Artículos de revistas: "Single particle inductively coupled plasma mass spectrometry (SP-ICPMS)"

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Tuoriniemi, Jani, Timothy R. Holbrook, Geert Cornelis, Melanie Schmitt, Hans-Joachim Stärk y Stephan Wagner. "Measurement of number concentrations and sizes of Au nano-particles spiked into soil by laser ablation single particle ICPMS". Journal of Analytical Atomic Spectrometry 35, n.º 8 (2020): 1678–86. http://dx.doi.org/10.1039/d0ja00243g.

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Metarapi, Dino, Johannes T. van Elteren y Martin Šala. "Studying gold nanoparticle degradation during laser ablation–single particle-inductively coupled plasma mass spectrometry analysis". Journal of Analytical Atomic Spectrometry 36, n.º 9 (2021): 1879–83. http://dx.doi.org/10.1039/d1ja00150g.

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This work is a study of gold nanoparticle (NP) degradation upon laser ablation and provides guidelines for the optimal laser fluence for NP analysis by laser ablation single particle inductively coupled plasma mass spectrometry (LA-sp-ICPMS).

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Metarapi, Dino y Johannes T. van Elteren. "Fundamentals of single particle analysis in biomatrices by laser ablation-inductively coupled plasma mass spectrometry". Journal of Analytical Atomic Spectrometry 35, n.º 4 (2020): 784–93. http://dx.doi.org/10.1039/d0ja00003e.

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Metarapi, Dino, Johannes T. van Elteren, Martin Šala, Katarina Vogel-Mikuš, Iztok Arčon, Vid S. Šelih, Mitja Kolar y Samo B. Hočevar. "Laser ablation-single-particle-inductively coupled plasma mass spectrometry as a multimodality bioimaging tool in nano-based omics". Environmental Science: Nano 8, n.º 3 (2021): 647–56. http://dx.doi.org/10.1039/d0en01134g.

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Huang, Yingyan, Judy Tsz-Shan Lum y Kelvin Sze-Yin Leung. "Single particle ICP-MS combined with internal standardization for accurate characterization of polydisperse nanoparticles in complex matrices". Journal of Analytical Atomic Spectrometry 35, n.º 10 (2020): 2148–55. http://dx.doi.org/10.1039/d0ja00180e.

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Lee, Wan-Waan y Wing-Tat Chan. "Calibration of single-particle inductively coupled plasma-mass spectrometry (SP-ICP-MS)". Journal of Analytical Atomic Spectrometry 30, n.º 6 (2015): 1245–54. http://dx.doi.org/10.1039/c4ja00408f.

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Suwanroek, Wanida, Jitapa Sumranjit, Tuksadon Wutikhun y Atitaya Siripinyanond. "Use of single particle inductively coupled plasma mass spectrometry for the study of zinc oxide nanoparticles released from fabric face masks". Journal of Analytical Atomic Spectrometry 37, n.º 4 (2022): 759–67. http://dx.doi.org/10.1039/d1ja00447f.

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An analytical method based on single particle inductively coupled plasma mass spectrometry (SP-ICP-MS) was developed to study the release of ZnO nanoparticles from fabric face mask samples upon washing.

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Iglesias, Mònica y Laura Torrent. "Silver Nanoparticles and Ionic Silver Separation Using a Cation-Exchange Resin. Variables Affecting Their Separation and Improvements of AgNP Characterization by SP-ICPMS". Nanomaterials 11, n.º 10 (6 de octubre de 2021): 2626. http://dx.doi.org/10.3390/nano11102626.

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Silver nanoparticles (AgNPs) are frequently found in everyday products and, as a consequence, their release into the environment cannot be avoided. Once in aquatic systems, AgNPs interact with natural constituents and undergo different transformation processes. Therefore, it is important to characterize and quantify AgNPs in environmental waters in order to understand their behavior, their transformation, and their associated toxicological risks. However, the coexistence of ionic silver (Ag+) with AgNPs in aquatic systems is one of the greatest challenges for the determination of nanosilver. Ion-exchange resins can be used to separate Ag+ from AgNPs, taking advantage of the different charges of the species. In this work, Dowex 50W-X8 was used to separate Ag+ and AgNPs in order to easily determine AgNP concentrations using inductively coupled plasma optical emission spectroscopy. The separation methodology was successfully applied to river water samples with different ratios of Ag+ and AgNPs. However, the methodology is not useful for wastewater samples. The described methodology also demonstrated an improvement in the determination of the particle size of AgNPs present in river waters by single particle inductively coupled plasma mass spectrometry when a significant amount of Ag+ is also present.

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Meng, Ziwei, Lingna Zheng, Hao Fang, Pu Yang, Bing Wang, Liang Li, Meng Wang y Weiyue Feng. "Single Particle Inductively Coupled Plasma Time-of-Flight Mass Spectrometry—A Powerful Tool for the Analysis of Nanoparticles in the Environment". Processes 11, n.º 4 (17 de abril de 2023): 1237. http://dx.doi.org/10.3390/pr11041237.

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Single-particle inductively coupled plasma-mass spectrometry (SP-ICP-MS) has emerged as an important tool for the characterization of inorganic nanoparticles (NPs) in the environment. Although most SP-ICP-MS applications rely on the quadrupole ICP-MS (ICP-QMS), it is limited by the slow scanning speed of the quadrupole. Recent advancements in instrumentation have led to the development of inductively coupled plasma time-of-flight mass spectrometry (ICP-TOF-MS) which offers a viable solution. In this review, we discuss the recent advances in instrumentation and methodology of ICP-TOF-MS, followed by a detailed discussion of the applications of SP-ICP-TOFMS in analyzing NPs in the environment. SP-ICP-TOFMS has the potential to identify and quantify both anthropogenic and natural NPs in the environment, providing valuable insights into their occurrence, fate, behavior, and potential environmental risks.

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Trujillo, Celia, Josefina Pérez-Arantegui, Ryszard Lobinski y Francisco Laborda. "Improving the Detectability of Microplastics in River Waters by Single Particle Inductively Coupled Plasma Mass Spectrometry". Nanomaterials 13, n.º 10 (9 de mayo de 2023): 1582. http://dx.doi.org/10.3390/nano13101582.

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Detection of microplastics in environmental samples requires fast, sensitive and selective analytical techniques, both in terms of the size of the microparticles and their concentration. Single particle inductively coupled plasma mass spectrometry (SP-ICP-MS) allows the detection of plastic particles down to ca. 1 µm and down to concentrations of 100 particles per mL. In SP-ICP-MS, detection of carbon-containing particles is hampered by the presence of other forms of carbon (carbonates, organic matter, microorganisms…). An acidic pre-treatment of river water samples with 10% (v/v) nitric acid for 24 h allowed the reduction of the presence of dissolved carbon to ultrapure water levels and the digestion of potential microorganisms in the samples, recovering polystyrene microparticles up to 80%. Carbon-containing particles were detected in most of the samples analysed from Spanish and French Pyrenean rivers. The presence of microplastics in these samples was confirmed by Raman microscopy and their morphology was defined by electron microscopy combined with energy-dispersive X-ray spectroscopy. The developed SP-ICP-MS method is suitable for the rapid screening of river waters for the presence of microplastics, which can then be analysed by inherently slower but more selective techniques (e.g., Raman microscopy).

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Donahue, Nathan D., Emmy R. Francek, Emi Kiyotake, Emily E. Thomas, Wen Yang, Lin Wang, Michael S. Detamore y Stefan Wilhelm. "Assessing nanoparticle colloidal stability with single-particle inductively coupled plasma mass spectrometry (SP-ICP-MS)". Analytical and Bioanalytical Chemistry 412, n.º 22 (6 de julio de 2020): 5205–16. http://dx.doi.org/10.1007/s00216-020-02783-6.

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Bolea-Fernandez, Eduardo, Diego Leite, Ana Rua-Ibarz, Lieve Balcaen, Maite Aramendía, Martín Resano y Frank Vanhaecke. "Characterization of SiO2nanoparticles by single particle-inductively coupled plasma-tandem mass spectrometry (SP-ICP-MS/MS)". Journal of Analytical Atomic Spectrometry 32, n.º 11 (2017): 2140–52. http://dx.doi.org/10.1039/c7ja00138j.

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Flores, Kenneth, Reagan S. Turley, Carolina Valdes, Yuqing Ye, Jesus Cantu, Jose A. Hernandez-Viezcas, Jason G. Parsons y Jorge L. Gardea-Torresdey. "Environmental applications and recent innovations in single particle inductively coupled plasma mass spectrometry (SP-ICP-MS)". Applied Spectroscopy Reviews 56, n.º 1 (27 de noviembre de 2019): 1–26. http://dx.doi.org/10.1080/05704928.2019.1694937.

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Chalifoux, Alexandre, Madjid Hadioui, Nesrine Amiri y Kevin J. Wilkinson. "Analysis of Silver Nanoparticles in Ground Beef by Single Particle Inductively Coupled Plasma Mass Spectrometry (SP-ICP-MS)". Molecules 28, n.º 11 (30 de mayo de 2023): 4442. http://dx.doi.org/10.3390/molecules28114442.

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The regulation and characterization of nanomaterials in foods are of great interest due to the potential risks associated with their exposure and the increasing number of applications where they are used within the food industry. One factor limiting the scientifically rigorous regulation of nanoparticles in foods is the lack of standardized procedures for the extraction of nanoparticles (NPs) from complex matrices without alteration of their physico-chemical properties. To this end, we tested and optimized two sample preparation approaches (enzymatic- and alkaline-based hydrolyses) in order to extract 40 nm of Ag NP, following their equilibration with a fatty ground beef matrix. NPs were characterized using single particle inductively coupled plasma mass spectrometry (SP-ICP-MS). Fast sample processing times (<20 min) were achieved using ultrasonication to accelerate the matrix degradation. NP losses during the sample preparation were minimized by optimizing the choice of enzymes/chemicals, the use of surfactants, and the product concentration and sonication. The alkaline approach using TMAH (tetramethylammonium hydroxide) was found to have the highest recoveries (over 90%); however, processed samples were found to be less stable than the samples processed using an enzymatic digestion based upon pork pancreatin and lipase (≈60 % recovery). Low method detection limits (MDLs) of 4.8 × 106 particles g−1 with a size detection limit (SDL) of 10.9 nm were achieved for the enzymatic extraction whereas an MDL of 5.7 × 107 particles g−1 and an SDL of 10.5 nm were obtained for the alkaline hydrolysis.

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Mehrabi, Kamyar, Ralf Kaegi, Detlef Günther y Alexander Gundlach-Graham. "Quantification and Clustering of Inorganic Nanoparticles in Wastewater Treatment Plants across Switzerland". CHIMIA International Journal for Chemistry 75, n.º 7 (25 de agosto de 2021): 642–46. http://dx.doi.org/10.2533/chimia.2021.642.

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Single particle Inductively Coupled Plasma Time-of-Flight Mass Spectrometry (sp-ICP-TOFMS), in combination with online microdroplet calibration, allows the determination of particle number concentrations (PNCs) and the masses of elements in individual particles. Because sp-ICP-TOFMS analyses of environmental samples produce rich datasets composed of both single-metal nanoparticles (smNPs) and many types of multimetal NPs (mmNPs), interpretation of these data is well suited to automated analysis schemes. Here, we present a data analysis approach that includes automatic particle detection and elemental mass determinations based on online microdroplet calibration, and unsupervised clustering analysis of mmNPs to identify unique classes of NPs based on their element compositions. To demonstrate the potential of our approach, we analyzed wastewater samples collected from the influent and effluent of five wastewater treatment plants (WWTPs) across Switzerland. We determined elemental masses in individual NPs, as well as PNCs, to estimate the NP removal efficiencies of the individual WWTPs. Through hierarchical clustering, we identified NP classes conserved across all WWTPs; the most abundant particle types were those rich in Ce-La, Fe-Al, Ti-Zr, and Zn-Cu. In addition, we found particle types that are unique to one or a few WWTPs, which could indicate point sources of anthropogenic NPs.

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Li, Bin, Sew Lay Chua, Dingyi Yu, Sheot Harn Chan y Angela Li. "Detection, Identification and Size Distribution of Silver Nanoparticles (AgNPs) in Milk and Migration Study for Breast Milk Storage Bags". Molecules 27, n.º 8 (14 de abril de 2022): 2539. http://dx.doi.org/10.3390/molecules27082539.

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The engineered silver nanoparticles (AgNPs) have been widely used in various food contact materials (FCMs) based on their antibacterial properties. This widespread use of nanosilver has, however, increased the risk of exposure of AgNPs to human due to their migration from FCMs causing a potential hazard present in foods. Therefore, it is important to establish a reliable and practical method for the detection of AgNPs in food matrices to support risk assessment on AgNPs exposure. Taking the examples of milk and AgNPs-containing breast milk storage bags, this study established an approach for size characterization and quantification of AgNPs in milk and evaluated the relevant silver migration, based on enzymatic digestion and the analysis by asymmetric flow field–flow fractionation (AF4) hyphenated with inductively coupled plasma mass spectrometry (ICP-MS) and single particle inductively coupled plasma mass spectrometry (SP-ICP-MS). No migration of AgNPs was found from breast milk storage bags under various simulated storage conditions as well as extreme scenarios. The suitability and reliability of this method were also validated by the determination of multiple parameters, including accuracy, repeatability, limit of detection (LOD), limit of quantification (LOQ), and recovery, for AF4-ICP-MS and SP-ICP-MS, respectively, with good and overall acceptable evaluation results obtained for all. The established and validated approach was demonstrated to be suitable for the characterization and quantitation of AgNPs in milk as well as the analysis of their migration from breast milk storage bags.

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Semenova, Daria y Yuliya E. Silina. "The Role of Nanoanalytics in the Development of Organic-Inorganic Nanohybrids—Seeing Nanomaterials as They Are". Nanomaterials 9, n.º 12 (23 de noviembre de 2019): 1673. http://dx.doi.org/10.3390/nano9121673.

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The functional properties of organic-inorganic (O-I) hybrids can be easily tuned by combining system components and parameters, making this class of novel nanomaterials a crucial element in various application fields. Unfortunately, the manufacturing of organic-inorganic nanohybrids still suffers from mechanical instability and insufficient synthesis reproducibility. The control of the composition and structure of nanosurfaces themselves is a specific analytical challenge and plays an important role in the future reproducibility of hybrid nanomaterials surface properties and response. Therefore, appropriate and sufficient analytical methodologies and technical guidance for control of their synthesis, characterization and standardization of the final product quality at the nanoscale level should be established. In this review, we summarize and compare the analytical merit of the modern analytical methods, viz. Fourier transform infrared spectroscopy (FTIR), RAMAN spectroscopy, surface plasmon resonance (SPR) and several mass spectrometry (MS)-based techniques, that is, inductively coupled plasma mass spectrometry (ICP-MS), single particle ICP-MS (sp-ICP-MS), laser ablation coupled ICP-MS (LA-ICP-MS), time-of-flight secondary ion mass spectrometry (TOF-SIMS), liquid chromatography mass spectrometry (LC-MS) utilized for characterization of O-I nanohybrids. Special attention is given to laser desorption ionization mass spectrometry (LDI-MS) as a reliable nanoanalytical platform for characterization of O-I hybrid nanomaterials, their quality, design verification and validation.

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Bazo, Antonio, Maite Aramendía, Flávio V. Nakadi y Martín Resano. "An Approach Based on an Increased Bandpass for Enabling the Use of Internal Standards in Single Particle ICP-MS: Application to AuNPs Characterization". Nanomaterials 13, n.º 12 (10 de junio de 2023): 1838. http://dx.doi.org/10.3390/nano13121838.

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This paper proposes a novel approach to implement an internal standard (IS) correction in single particle inductively coupled plasma mass spectrometry (SP ICP-MS), as exemplified for the characterization of Au nanoparticles (NPs) in complex matrices. This approach is based on the use of the mass spectrometer (quadrupole) in bandpass mode, enhancing the sensitivity for the monitoring of AuNPs while also allowing for the detection of PtNPs in the same measurement run, such that they can serve as an internal standard. The performance of the method developed was proved for three different matrices: pure water, a 5 g L−1 NaCl water solution, and another water solution containing 2.5% (m/v) tetramethylammonium hydroxide (TMAH)/0.1% Triton X-100. It was observed that matrix-effects impacted both the sensitivity of the NPs and their transport efficiencies. To circumvent this problem, two methods were used to determine the TE: the particle size method for sizing and the dynamic mass flow method for the determination of the particle number concentration (PNC). This fact, together with the use of the IS, enabled us to attain accurate results in all cases, both for sizing and for the PNC determination. Additionally, the use of the bandpass mode provides additional flexibility for this characterization, as it is possible to easily tune the sensitivity achieved for each NP type to ensure that their distributions are sufficiently resolved.

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Manard, Benjamin T., Veronica C. Bradley, C. Derrick Quarles, Lyndsey Hendriks, Daniel R. Dunlap, Cole R. Hexel, Patrick Sullivan y Hunter B. Andrews. "Towards Automated and High-Throughput Quantitative Sizing and Isotopic Analysis of Nanoparticles via Single Particle-ICP-TOF-MS". Nanomaterials 13, n.º 8 (9 de abril de 2023): 1322. http://dx.doi.org/10.3390/nano13081322.

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The work described herein assesses the ability to characterize gold nanoparticles (Au NPs) of 50 and 100 nm, as well as 60 nm silver shelled gold core nanospheres (Au/Ag NPs), for their mass, respective size, and isotopic composition in an automated and unattended fashion. Here, an innovative autosampler was employed to mix and transport the blanks, standards, and samples into a high-efficiency single particle (SP) introduction system for subsequent analysis by inductively coupled plasma–time of flight–mass spectrometry (ICP-TOF-MS). Optimized NP transport efficiency into the ICP-TOF-MS was determined to be >80%. This combination, SP-ICP-TOF-MS, allowed for high-throughput sample analysis. Specifically, 50 total samples (including blanks/standards) were analyzed over 8 h, to provide an accurate characterization of the NPs. This methodology was implemented over the course of 5 days to assess its long-term reproducibility. Impressively, the in-run and day-to-day variation of sample transport is assessed to be 3.54 and 9.52% relative standard deviation (%RSD), respectively. The determination of Au NP size and concentration was of <5% relative difference from the certified values over these time periods. Isotopic characterization of the 107Ag/109Ag particles (n = 132,630) over the course of the measurements was determined to be 1.0788 ± 0.0030 with high accuracy (0.23% relative difference) when compared to the multi-collector–ICP-MS determination.

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Marigliano, Lucile, Bruno Grassl, Joanna Szpunar, Stéphanie Reynaud y Javier Jiménez-Lamana. "Nanoplastic Labelling with Metal Probes: Analytical Strategies for Their Sensitive Detection and Quantification by ICP Mass Spectrometry". Molecules 26, n.º 23 (24 de noviembre de 2021): 7093. http://dx.doi.org/10.3390/molecules26237093.

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The detection and quantification of nanoplastics in aquatic environments is one of the major challenges in environmental and analytical research nowadays. The use of common analytical techniques for this purpose is not only hampered by the size of nanoplastics, but also because they are mainly made of carbon. In addition, the expected concentrations in environmental samples are below the detection limit of the majority of analytical techniques. In this context, the great detection capabilities of Inductively Coupled Plasma Mass Spectrometry (ICP-MS) in its Single Particle mode (SP-ICP-MS) have made of this technique a good candidate for the analysis of nanoplastics. Since the monitoring of carbon by ICP-MS faces several difficulties, the use of metal tags, taking advantage of the great potential of nanoplastics to adsorb chemical compounds, has been proposed as an alternative. In this perspectives paper, three different strategies for the analysis of polystyrene (PS) nanoplastics by SP-ICP-MS based on the use of metals species (ions, hydrophobic organometallic compound, and nanoparticles) as tags are presented and discussed. Advantages and disadvantages of each strategy, which rely on the labelling process, are highlighted. The metal nanoparticles labelling strategy is shown as a promising tool for the detection and quantification of nanoplastics in aqueous matrices by SP-ICP-MS.

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Temerdashev, Zaual A., Olga A. Galitskaya y Mikhail A. Bolshov. "A Novel Method for the Background Signal Correction in SP-ICP-MS Analysis of the Sizes of Titanium Dioxide Nanoparticles in Cosmetic Samples". Molecules 27, n.º 22 (10 de noviembre de 2022): 7748. http://dx.doi.org/10.3390/molecules27227748.

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We discuss the features involved in determining the titanium dioxide nanoparticle (TiO2NP) sizes in cosmetic samples via single particle inductively coupled plasma mass spectrometry (SP-ICP-MS) in the millisecond-time resolution mode, and methods for considering the background signal. In the SP-ICP-MS determination of TiO2NPs in cosmetics, the background signal was recorded in each dwell time interval due to the signal of the Ti dissolved form in deionized water, and the background signal of the cosmetic matrix was compensated by dilution. A correction procedure for the frequency and intensity of the background signal is proposed, which differs from the known procedures due to its correction by the standard deviation above the background signal. Background signals were removed from the sample signal distribution using the deionized water signal distribution. Data processing was carried out using Microsoft Office Excel and SPCal software. The distributions of NP signals in cosmetic product samples were studied in the dwell time range of 4–20 ms. The limit of detection of the NP size (LODsize) with the proposed background signal correction procedure was 71 nm. For the studied samples, the LODsize did not depend on the threshold of the background signal and was determined by the sensitivity of the mass spectrometer.

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Bocca, B., S. Caimi, CM Failla, E. Dellambra, D. Lulli, ML Carbone, F. Scatozza, I. De Angelis y B. Battistini. "A SP-ICP-MS protocol for the detection of metal nanoparticles composition and size in tattooed ex vivo human skin explants". Journal of Physics: Conference Series 2579, n.º 1 (1 de agosto de 2023): 012008. http://dx.doi.org/10.1088/1742-6596/2579/1/012008.

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Abstract We developed and validated a protocol based on Single Particle Inductively Coupled Plasma Mass Spectrometry (SP ICP-MS) to detect composition and size of metal nanoparticles (MNPs) in tattoo inks end ex vivo tattooed human skin explants. The explants were tattooed with different inks using an ordinary tattoo machine. Then, 72 hours after tattooing, skin explants were subjected to alkaline extraction by tetramethylammonium hydroxide solution and MNPs of Ag, Al2O3, Au, Cr2O3, CuO, Fe2O3, TiO2 and ZnO were analysed for particle composition and size by SP ICP-MS. The method was validated by assessing the limit of detection, accuracy, precision, and size stability over 72 hours. Particles of Al2O3, Cr2O3, CuO, Fe2O3, TiO2 and ZnO were observed in human skin in the range from 27 nm to 153 nm, and from 26 nm to 228 nm in tattoo inks. Ag and Au NPs were not found neither in inks nor in the skin. Advantages of the protocol were the ability to simultaneously detect the composition of particles and their size, the straightforward sample preparation, the high sensitivity and precision, and the speed of execution of the analysis. The developed methodology can be applied to skin exposed to other consumer products topically applied, such as sunscreens, cosmetics, personal care products and medical devices, which can be all sources of MNPs, in order to improve knowledge and support the human exposure assessment process.

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Sampath, Siddarth, Kusum Maharjan, Anthony Ozzello y Ashutosh Bhabhe. "Characterization and Removal of Metallic Contamination in H₂O and H₂O₂ Using Single Particle Inductively Coupled Plasma Mass Spectrometry". Solid State Phenomena 314 (febrero de 2021): 9–16. http://dx.doi.org/10.4028/www.scientific.net/ssp.314.9.

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Metallic contamination is a major challenge in multiple semiconductor processes, including photolithography and wet etch and cleans (WEC). Though there are several contributors to metallic contamination, significant efforts have focused on improving the incoming quality of process chemicals, especially commodity chemicals. Another key contributor to on-wafer metallic contamination is water (H2O), which is used to dilute most aqueous chemicals. Single Particle Inductively Coupled Plasma Mass Spectroscopy (SP-ICP-MS), a technique relying on time-based resolution of pulses generated during a standard ICP-MS analysis, is used to aid the understanding of metal particle contamination in water and process chemicals.In this paper, we studied water and 30% Hydrogen Peroxide (H2O2), two of the most widely used chemicals across all WEC processes. We used a high purity grade of 30% H2O2, further diluted to a typical use concentration (5% by volume) using two grades of Deionized Water (unfiltered and filtered) where the concentration of metallic particles was the key variable. The metals studied included Iron (Fe), Chromium (Cr), Zinc (Zn), Titanium (Ti), Nickel (Ni) and Aluminum (Al), representing some of the most commonly observed metallic contaminants in H2O2 and water. After analyzing the distribution of contaminants in the chemicals, filters were introduced into the system to observe the impact of filtration on metal removal. The importance of filtration on the overall quality of the diluted process chemical was demonstrated by using a Polysulfone (PS) membrane to filter the lower grade Deionized Water (DIW).

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Proulx, Kim y Kevin J. Wilkinson. "Separation, detection and characterisation of engineered nanoparticles in natural waters using hydrodynamic chromatography and multi-method detection (light scattering, analytical ultracentrifugation and single particle ICP-MS)". Environmental Chemistry 11, n.º 4 (2014): 392. http://dx.doi.org/10.1071/en13232.

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Environmental context The effects of engineered nanoparticles on the environment and on human health are difficult to evaluate largely because nanoparticles are so difficult to measure. The main problems are that concentrations are low and the engineered nanoparticles are often difficult to distinguish from the environmental matrices in which they are found. We report a separation technique that facilitates the detection of engineered nanoparticles in natural waters. Abstract Few analytical techniques are presently able to detect and quantify engineered nanoparticles (ENPs) in the environment. The major challenges result from the complex matrices of environmental samples and the low concentrations at which the ENPs are expected to be found. Separation techniques such as asymmetric flow field flow fractionation (AF4) and more recently, hydrodynamic chromatography (HDC) have been used to partly resolve ENPs from their complex environmental matrices. In this paper, HDC was first coupled to light scattering detectors in order to develop a method that would allow the separation and detection of ENPs spiked into a natural water. Size fractionated samples were characterised using off-line detectors including analytical ultracentrifugation (AUC), dynamic light scattering (DLS) and single particle inductively coupled plasma mass spectrometry (SP-ICP-MS). HDC was able to separate a complex mixture of polystyrene, silver and gold nanoparticles (radii of 60, 40, 20 and 10nm) contained within a river water matrix. Furthermore, the feasibility of using HDC coupled to SP-ICP-MS was demonstrated by detecting 4µgL–1 of a 20-nm (radius) nAg in a river water sample.

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Bocca, Beatrice, Beatrice Battistini, Veruscka Leso, Luca Fontana, Stefano Caimi, Mauro Fedele y Ivo Iavicoli. "Occupational Exposure to Metal Engineered Nanoparticles: A Human Biomonitoring Pilot Study Involving Italian Nanomaterial Workers". Toxics 11, n.º 2 (26 de enero de 2023): 120. http://dx.doi.org/10.3390/toxics11020120.

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Advances in nanotechnology have led to an increased use of engineered nanoparticles (ENPs) and the likelihood for occupational exposures. However, how to assess such exposure remains a challenge. In this study, a methodology for human biomonitoring, based on Single Particle Inductively Coupled Plasma Mass Spectrometry (SP-ICP-MS), was developed as a tool to assess the ENPs exposure of workers involved in nanomaterial activities in two Italian Companies. The method was validated for size and number concentration determination of Ag, Au, In2O3, Ir, Pd, Pt, and TiO2 NPs in urine and blood samples. The results showed the presence of In2O3 NPs in blood of exposed workers (mean, 38 nm and 10,371 particles/mL), but not in blood of controls. Silver, Au, and TiO2 NPs were found in urine (mean, Ag 29 nm and 16,568 particles/mL) or blood (mean, Au 15 nm and 126,635 particles/mL; TiO2 84 nm and 27,705 particles/mL) of workers, though these NPs were found also in controls. The presence of ENPs in both workers and controls suggested that the extra-professional exposure is a source of ENPs that cannot be disregarded. Iridium, Pd, and Pt NPs were not detected neither in blood nor in urine. Overall, the findings provided a rational basis to evaluate the exposure assessment to ENPs in cohorts of workers as part of risk assessment and risk management processes in workplaces.

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Singh, Priyanka y Ivan Mijakovic. "Rowan Berries: A Potential Source for Green Synthesis of Extremely Monodisperse Gold and Silver Nanoparticles and Their Antimicrobial Property". Pharmaceutics 14, n.º 1 (29 de diciembre de 2021): 82. http://dx.doi.org/10.3390/pharmaceutics14010082.

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Rowanberries (Sorbus aucuparia) are omnipresent in Europe. The medicinal importance of rowanberries is widely known and corresponds to the active ingredients present in the fruits, mainly polyphenols, carotenoids, and organic acids. In the current study, we explored rowanberries for the reduction of gold and silver salts into nanoparticles. Rowanberries-mediated gold nanoparticles (RB-AuNPs) formed within 5 s at room temperature, and silver nanoparticles (RB-AgNPs) formed in 20 min at 90 °C. The produced nanoparticles were thoroughly characterized by UV-Vis spectroscopy, scanning electron microscopy (SEM), energy dispersive X-ray (EDX), transmission electron microscopy (TEM), dynamic light scattering (DLS), single-particle inductively coupled plasma–mass spectrometry (sp-ICP-MS), thermogravimetric analysis (TGA), Fourier transform-infrared spectroscopy (FT-IR) and matrix-assisted laser desorption/ionization time of flight mass spectrometry (MALDI-TOF). The characterization confirmed that the nanoparticles are highly monodisperse, spherical, stable over long periods, and exhibit a high negative zeta potential values. The produced RB-AuNPs and RB-AgNPs were 90–100 nm and 20–30 nm in size with a thick biological corona layer surrounding them, providing extreme stability but lowering the antimicrobial activity. The antimicrobials study of RB-AgNPs revealed that the nanoparticles have antimicrobial potential with an MBC value of 100 µg/mL against P. aeruginosa and 200 µg/mL against E. coli.

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Hachenberger, Yves Uwe, Daniel Rosenkranz, Charlotte Kromer, Benjamin Christoph Krause, Nadine Dreiack, Fabian Lukas Kriegel, Ekaterina Koz’menko et al. "Nanomaterial Characterization in Complex Media—Guidance and Application". Nanomaterials 13, n.º 5 (2 de marzo de 2023): 922. http://dx.doi.org/10.3390/nano13050922.

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A broad range of inorganic nanoparticles (NPs) and their dissolved ions possess a possible toxicological risk for human health and the environment. Reliable and robust measurements of dissolution effects may be influenced by the sample matrix, which challenges the analytical method of choice. In this study, CuO NPs were investigated in several dissolution experiments. Two analytical techniques (dynamic light scattering (DLS) and inductively-coupled plasma mass spectrometry (ICP-MS)) were used to characterize NPs (size distribution curves) time-dependently in different complex matrices (e.g., artificial lung lining fluids and cell culture media). The advantages and challenges of each analytical approach are evaluated and discussed. Additionally, a direct-injection single particle (DI sp)ICP-MS technique for assessing the size distribution curve of the dissolved particles was developed and evaluated. The DI technique provides a sensitive response even at low concentrations without any dilution of the complex sample matrix. These experiments were further enhanced with an automated data evaluation procedure to objectively distinguish between ionic and NP events. With this approach, a fast and reproducible determination of inorganic NPs and ionic backgrounds can be achieved. This study can serve as guidance when choosing the optimal analytical method for NP characterization and for the determination of the origin of an adverse effect in NP toxicity.

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Wei, Wen-Jing, Yuan Yang, Xin-Yuan Li, Peng Huang, Qiang Wang y Ping-Jian Yang. "Cloud point extraction (CPE) combined with single particle -inductively coupled plasma-mass spectrometry (SP-ICP-MS) to analyze and characterize nano-silver sulfide in water environment". Talanta 239 (marzo de 2022): 123117. http://dx.doi.org/10.1016/j.talanta.2021.123117.

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Pinheiro, Ivone, Monica Quarato, Antonio Moreda-Piñeiro, Ana Vieira, Virginie Serin, David Neumeyer, Nicolas Ratel-Ramond et al. "Acute Aquatic Toxicity to Zebrafish and Bioaccumulation in Marine Mussels of Antimony Tin Oxide Nanoparticles". Nanomaterials 13, n.º 14 (20 de julio de 2023): 2112. http://dx.doi.org/10.3390/nano13142112.

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Antimony tin oxide (Sb2O5/SnO2) is effective in the absorption of infrared radiation for applications, such as skylights. As a nanoparticle (NP), it can be incorporated into films or sheets providing infrared radiation attenuation while allowing for a transparent final product. The acute toxicity exerted by commercial Sb2O5/SnO2 (ATO) NPs was studied in adults and embryos of zebrafish (Danio rerio). Our results suggest that these NPs do not induce an acute toxicity in zebrafish, either adults or embryos. However, some sub-lethal parameters were altered: heart rate and spontaneous movements. Finally, the possible bioaccumulation of these NPs in the aquacultured marine mussel Mytilus sp. was studied. A quantitative analysis was performed using single particle inductively coupled plasma mass spectrometry (sp-ICP-MS). The results indicated that, despite being scarce (2.31 × 106 ± 9.05 × 105 NPs/g), there is some accumulation of the ATO NPs in the mussel. In conclusion, commercial ATO NPs seem to be quite innocuous to aquatic organisms; however, the fact that some of the developmental parameters in zebrafish embryos are altered should be considered for further investigation. More in-depth analysis of these NPs transformations in the digestive tract of humans is needed to assess whether their accumulation in mussels presents an actual risk to humans.

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Heilgeist, Simone, Ryo Sekine, Oz Sahin y Rodney A. Stewart. "Finding Nano: Challenges Involved in Monitoring the Presence and Fate of Engineered Titanium Dioxide Nanoparticles in Aquatic Environments". Water 13, n.º 5 (8 de marzo de 2021): 734. http://dx.doi.org/10.3390/w13050734.

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In recent years, titanium dioxide (TiO2) has increasingly been used as an inorganic ultraviolet (UV) filter for sun protection. However, nano-TiO2 may also pose risks to the health of humans and the environment. Thus, to adequately assess its potential adverse effects, a comprehensive understanding of the behaviour and fate of TiO2 in different environments is crucial. Advances in analytical and modelling methods continue to improve researchers’ ability to quantify and determine the state of nano-TiO2 in various environments. However, due to the complexity of environmental and nanoparticle factors and their interplay, this remains a challenging and poorly resolved feat. This paper aims to provide a focused summary of key particle and environmental characteristics that influence the behaviour and fate of sunscreen-derived TiO2 in swimming pool water and natural aquatic environments and to review the current state-of-the-art of single particle inductively coupled plasma mass spectrometry (SP-ICP-MS) approaches to detect and characterise TiO2 nanoparticles in aqueous media. Furthermore, it critically analyses the capability of existing fate and transport models to predict environmental TiO2 levels. Four particle and environmental key factors that govern the fate and behaviour of TiO2 in aqueous environments are identified. A comparison of SP-ICP-MS studies reveals that it remains challenging to detect and characterise engineered TiO2 nanoparticles in various matrices and highlights the need for the development of new SP-ICP-MS pre-treatment and analysis approaches. This review shows that modelling studies are an essential addition to experimental studies, but they still lack in spatial and temporal resolution and mostly exclude surface transformation processes. Finally, this study identifies the use of Bayesian Network-based models as an underexplored but promising modelling tool to overcome data uncertainties and incorporates interconnected variables.

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Lee, Woo-Chun, Byung-Tae Lee, Seungho Lee, Yu Sik Hwang, Eunhye Jo, Ig-Chun Eom, Sang-Woo Lee y Soon-Oh Kim. "Optimisation, evaluation and application of asymmetrical flow field-flow fractionation with single particle inductively coupled plasma mass spectrometry (SP-ICP-MS) to characterise silver nanoparticles in environmental media". Microchemical Journal 129 (noviembre de 2016): 219–30. http://dx.doi.org/10.1016/j.microc.2016.06.030.

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Mozhayeva, Darya, Ingo Strenge y Carsten Engelhard. "Implementation of Online Preconcentration and Microsecond Time Resolution to Capillary Electrophoresis Single Particle Inductively Coupled Plasma Mass Spectrometry (CE-SP-ICP-MS) and Its Application in Silver Nanoparticle Analysis". Analytical Chemistry 89, n.º 13 (23 de junio de 2017): 7152–59. http://dx.doi.org/10.1021/acs.analchem.7b01185.

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Weigel, Stefan, Ruud Peters, Katrin Loeschner, Ringo Grombe y Thomas P. J. Linsinger. "Results of an interlaboratory method performance study for the size determination and quantification of silver nanoparticles in chicken meat by single-particle inductively coupled plasma mass spectrometry (sp-ICP-MS)". Analytical and Bioanalytical Chemistry 409, n.º 20 (20 de junio de 2017): 4839–48. http://dx.doi.org/10.1007/s00216-017-0427-2.

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Makama, Sunday, Ruud Peters, Anna Undas y Nico W. van den Brink. "A novel method for the quantification, characterisation and speciation of silver nanoparticles in earthworms exposed in soil". Environmental Chemistry 12, n.º 6 (2015): 643. http://dx.doi.org/10.1071/en15006.

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Environmental context Increasing production and application of engineered nanoparticles has led to an increased potential for their environmental release, raising ecotoxicological concerns. To appropriately characterise the fate, effects and risks of engineered nanoparticles in environmental systems, methods are essential to characterise nanoparticles in complex biological matrices. This study reports a method that extracts nanoparticles from tissues of organisms, enabling their detection, quantification and characterisation. Abstract Currently, metal engineered nanoparticles (ENPs) in tissues are generally quantified based on total concentrations after acid digestion of samples. Electron microscopy has also been used for non-quantitative characterisation of NPs in situ, and can be enhanced with tissue-processing methods that can extract NPs with minimal destruction. For a proper risk assessment, it is essential to quantify and characterise the ENPs in both exposure media and organisms. For this, we developed a method using a combination of enzymatic tissue processing, followed by single particle inductively coupled plasma–mass spectrometry (sp-ICP-MS) to characterise and quantify AgNPs in tissues of earthworms after in vivo exposure in soil to 50-nm AgNPs or AgNO3. Tissue concentration of Ag in worms exposed to 250mg AgNP kg–1 soil (dry weight) was 0.502±0.219mgkg–1 (dry weight) reflecting a bioaccumulation factor of 0.002. In both AgNP- and AgNO3-treated groups, the metal-rich granule fraction contained the highest Ag concentrations (77 and 64% respectively). Total Ag contained in the earthworm tissue of the AgNP- and AgNO3-treated groups comprised ~34 and <5% particulate Ag respectively. Average particle size of AgNPs extracted from tissues was consistent with exposure material (44 v. 43nm respectively). High resolution field-emission gun scanning electron microscopy in combination with energy-dispersive X-ray (FEG-SEM/EDX) identified individual AgNPs in tissue extracts with corresponding spectral elemental peaks, providing further evidence of tissue particle uptake and composition.

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Schwertfeger, Dina, Jessica Velicogna, Alexander Jesmer, Heather McShane, Richard Scroggins y Juliska Princz. "Ion exchange technique (IET) to characterise Ag+ exposure in soil extracts contaminated with engineered silver nanoparticles". Environmental Chemistry 14, n.º 2 (2017): 123. http://dx.doi.org/10.1071/en16136.

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Environmental contextBiosolid-amended soils are likely sinks for manufactured silver nanoparticles, the environmental toxicity of which is believed to be related to the release and accumulation of Ag+ ions. This study demonstrates how an ion exchange technique can be applied to soil extracts to provide Ag+ measurements at low, environmentally relevant levels. The technique is a valuable addition to existing analytical methods for tracking the behaviour of Ag nanoparticles and Ag+ ions in the terrestrial environment. AbstractThe lack of silver speciation exposure data in toxicity studies investigating the effects of manufactured silver nanoparticles (AgNPs) in natural soil media limits the ability to discern nano-specific effects from effects of the toxic Ag+ form, which may be released from the manufactured AgNPs contained in wastewater, biosolids or soil environment. Using samples containing Ag+ or mixtures of Ag+ and AgNPs, ranging in total Ag concentrations of 10–5 to 10–9 M, and prepared in de-ionised water and filtered soil extracts, the validity of the ion exchange technique (IET) to quantify Ag+ was investigated by comparing measurements to those of an Ag+ ion selective electrode (ISE) and to the dissolved fraction from single particle inductively coupled plasma–mass spectrometry (SP-ICP-MS) analysis (SP-dissolved). When analysing samples in the filtered soil extract, IET and ISE gave comparable results down to 10–7 M, below which Ag+ activities were below the ISE detection limit. For water samples, SP-dissolved values were generally comparable or slightly greater (on average 65%) compared with IET-Ag+ at all concentrations. The high bias was likely due to inclusion of unresolved particles below the SP-ICP detection limit of 19nm. However, when analysing samples in the soil extract, SP-dissolved values were on average eight-fold greater than IET-Ag+, highlighting the effect that natural colloidal and dissolved soil constituents have on complexing Ag+, as well as the lack of specificity of the SP-dissolved analysis for the Ag+ species. IET is shown here to be a valid procedure to quantify Ag+ activity in soil extracts, and while the study highlights the limitations of using the SP-dissolved fraction to estimate this biologically relevant Ag fraction, it shows that combined, IET and SP-ICP-MS provide a valuable approach for investigating the behaviour of manufactured AgNPs in different matrixes.

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Zhou, Zichao, Ahmed Al Hejami, Mirah Burgener, John A. Burgener y Diane Beauchemin. "A total consumption infrared heated sample introduction system for nanoparticle measurement using single particle inductively coupled plasma mass spectrometry". Journal of Analytical Atomic Spectrometry, 2022. http://dx.doi.org/10.1039/d2ja00059h.

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Single particle inductively coupled plasma mass spectrometry (sp-ICPMS) is a fast technique for measuring the mass and concentration of nanoparticles (NPs) suspended in solution, which requires measurement of the sample...

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Elinkmann, Matthias, Sarah Reuter, Michael Holtkamp, Steffen Heuckeroth, Alexander Köhrer, Katharina Kronenberg, Michael Sperling et al. "Improving detection thresholds and robust event filtering in single-particle and single-cell ICP-MS analysis". Journal of Analytical Atomic Spectrometry, 2023. http://dx.doi.org/10.1039/d3ja00292f.

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Ojeda, David, Eduardo Bolea, Josefina Perez-Arantegui y Francisco Laborda. "Exploring the boundaries in the analysis of large particles by single particle inductively coupled plasma mass spectrometry: Application to nanoclays". Journal of Analytical Atomic Spectrometry, 2022. http://dx.doi.org/10.1039/d2ja00026a.

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The analysis of microparticles by single particle inductively coupled plasma mass spectrometry (SP-ICP-MS) requires sample introduction systems that guarantee transport efficiencies similar to those obtained with dissolved standards along the...

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Bolea, Eduardo, Maria Sierra Jimenez, Josefina Perez-Arantegui, Juan C. Vidal, Mariam Bakir, Khaoula Ben-Jeddou, Ana Cristina Giménez, David Ojeda, Celia Trujillo y Francisco Laborda. "Analytical applications of single particle inductively coupled plasma mass spectrometry: A comprehensive and critical review". Analytical Methods, 2021. http://dx.doi.org/10.1039/d1ay00761k.

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Single particle inductively coupled plasma mass spectrometry (SP-ICP-MS) refers to the use of ICP-MS as a particle counting technique. When ICP-MS measurements are performed at very high data acquisition frequencies,...

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Peyneau, Pierre-Emmanuel y Martin Guillon. "Number of spikes in single particle ICP-MS time scans: from the very dilute to the highly concentrated range". Journal of Analytical Atomic Spectrometry, 2021. http://dx.doi.org/10.1039/d1ja00156f.

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The particle number concentration (PNC) of dilute nanoparticle dispersions can be determined by single particle inductively coupled plasma-mass spectrometry (sp-ICP-MS). Virtually equal to zero for very dilute dispersions, the difference...

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Peyneau, Pierre-Emmanuel. "Statistical properties of spikes in single particle ICP-MS time scans". Journal of Analytical Atomic Spectrometry, 2022. http://dx.doi.org/10.1039/d2ja00312k.

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Single particle inductively coupled plasma-mass spectrometry (sp-ICP-MS) is based on the detection of spikes in a time-resolved signal. Close to zero for very dilute dispersions, the probability for a given...

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Bradley, Veronica C., Benjamin T. Manard, Lyndsey Hendriks, Daniel R. Dunlap, Amber N. Bible, Ada Sedova, Patricia Saint-Vincent, Brian C. Sanders y Hunter B. Andrews. "Quantifying platinum binding on protein-functionalized magnetic microparticles using single particle-ICP-TOF-MS". Analytical Methods, 2024. http://dx.doi.org/10.1039/d4ay00268g.

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This work describes an analytical procedure, single particle-inductively coupled plasma-time-of-flight-mass spectrometry (SP-ICP-TOF-MS), that was developed to determine the platinum binding efficiency of protein-coated magnetic microparticles.

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Gupta, Soumya, Ahmed Allal y Hugues Preud’Homme. "Multi-screening analysis of single nanoparticles by the first multi-quadrupole ICPMS/MS". Green Technology, Resilience, and Sustainability 3, n.º 1 (26 de mayo de 2023). http://dx.doi.org/10.1007/s44173-023-00011-9.

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AbstractThe recent expansion in the use of nanomaterials in various fields has led to a growing concern over their impacts on environmental systems. Accurate detection, quantification, characterization, and tracking of the nanoparticles are essential for assessing the ecological risks and their implications for environmental health. Inductively coupled plasma mass spectrometry (ICP-MS) operated in single-particle mode is an attractive analytical tool for quantification and sizing very small nanoparticles in aqueous suspensions. The ICP-MultiQuad-MS/MS can rapidly detect (including highly interfered elements) and characterize a large number of particles, determine size and size distributions, the particle number concentration in a sample, and the elemental mass concentration of both dissolved and particulate species. This paper provides the first systematic review of the ICP-MultiQuad-MS/MS to perform NPs analysis applied to different structures and compositions while simultaneously comparing them with the current state of the art of ICP-(CRC)-MS available. This study is done on composite nanomaterials with different shapes for elements with high sensitivity and no interference, like Au, Ag, and Pt, and elements with high interferences and lower sensitivity, like Fe, Si, and Ti.

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Gimenez-Ingalaturre, Ana C., Khaoula Ben-Jeddou, Josefina Perez-Arantegui, María S. Jimenez, Eduardo Bolea y Francisco Laborda. "How to trust size distributions obtained by single particle inductively coupled plasma mass spectrometry analysis". Analytical and Bioanalytical Chemistry, 30 de julio de 2022. http://dx.doi.org/10.1007/s00216-022-04215-z.

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AbstractSingle particle inductively coupled plasma mass spectrometry (SP-ICP-MS) is a technique widely used to obtain direct information about the number concentration and the size distribution of nanoparticles in liquid suspensions. However, its methods still lack clear quality control strategies to confirm the validity of the information derived from them. Only the detection of the complete size distribution of the nanoparticles in a sample over the size critical value ensures obtaining unbiased quantitative information, otherwise information should be restricted to report the presence of nanoparticles over a certain size and number concentration since their actual total number concentration is underestimated and the size overestimated. Under the latter conditions, data processing produces histograms showing the tails of the incomplete size distributions, although apparently, complete distributions can also be obtained when particle events are recorded as peaks, as reported here for the first time. The occurrence of these misleading situations must be critically evaluated for each SP-ICP-MS analysis. An approach, based on estimation of size critical values and successive dilutions, is proposed for the assessment of the validity of the quantitative information obtained, together with specific criteria for reconsidering the information that can be derived from those measurements. The approach was verified with different case studies and applied to the analysis of complex nanomaterials, confirming the validity of the reported information by comparison with other techniques. A calculation tool is also included to facilitate the estimation of size critical values under experimental conditions. Graphical abstract

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Davison, Claire, Dany Beste, Melanie Bailey y Mónica Felipe-Sotelo. "Expanding the boundaries of atomic spectroscopy at the single-cell level: critical review of SP-ICP-MS, LIBS and LA-ICP-MS advances for the elemental analysis of tissues and single cells". Analytical and Bioanalytical Chemistry, 10 de mayo de 2023. http://dx.doi.org/10.1007/s00216-023-04721-8.

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AbstractMetals have a fundamental role in microbiology, and accurate methods are needed for their identification and quantification. The inability to assess cellular heterogeneity is considered an impediment to the successful treatment of different diseases. Unlike bulk approaches, single-cell analysis allows elemental heterogeneity across genetically identical populations to be related to specific biological events and to the effectiveness of drugs. Single particle-inductively coupled plasma-mass spectrometry (SP-ICP-MS) can analyse single cells in suspension and measure this heterogeneity. Here we explore advances in instrumental design, compare mass analysers and discuss key parameters requiring optimisation. This review has identified that the effect of pre-treatment of cell suspensions and cell fixation approaches require further study and novel validation methods are needed as using bulk measurements is unsatisfactory. SP-ICP-MS has the advantage that a large number of cells can be analysed; however, it does not provide spatial information. Techniques based on laser ablation (LA) enable elemental mapping at the single-cell level, such as laser-induced breakdown spectroscopy (LIBS) and laser ablation-inductively coupled plasma-mass spectrometry (LA-ICP-MS). The sensitivity of commercial LIBS instruments restricts its use for sub-tissue applications; however, the capacity to analyse endogenous bulk components paired with developments in nano-LIBS technology shows great potential for cellular research. LA-ICP-MS offers high sensitivity for the direct analysis of single cells, but standardisation requires further development. The hyphenation of these trace elemental analysis techniques and their coupling with multi-omic technologies for single-cell analysis have enormous potential in answering fundamental biological questions.

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Zhang, Chaoying, Qin Zhang, Yingchun Zhao, Dianquan Dong y Longjiang Huang. "Determination of Titanium (IV) Oxide Nanoparticles Released from Textiles by Single Particle – Inductively Coupled Plasma – Mass Spectrometry (SP-ICP-MS)". Analytical Letters, 5 de abril de 2023, 1–10. http://dx.doi.org/10.1080/00032719.2023.2195186.

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47

Pusuwan, Prawpan y Atitaya Siripinyanond. "Observing zinc oxide nanoparticles suspension stability in various media by using single particle inductively coupled plasma mass spectrometry (SP-ICP-MS)". Microchemical Journal, noviembre de 2023, 109705. http://dx.doi.org/10.1016/j.microc.2023.109705.

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Pirade, Februriyana, Kim Lompe, Javier Jimenez-Lamana, Sulalit Bandyopadhyay, Katharina Zürbes, Nesrine Bali, Dušan Materić y Jan Willem Foppen. "How suitable is the gold-labelling method for the quantification of nanoplastics in natural water?" AQUA — Water Infrastructure, Ecosystems and Society, 13 de noviembre de 2023. http://dx.doi.org/10.2166/aqua.2023.278.

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Abstract Nanoplastics are detected in surface water, yet accurately quantifying their particle number concentrations remains a significant challenge. In this study, we tested the applicability of a gold-labelling method to quantify nanoplastics in natural organic matter (NOM) containing water matrices. Gelatin-coated gold nanoparticles (Au-gel NPs) form conjugates with nanoplastics via electrostatic interaction which produces peak signals which can be translated into particle number concentration using single-particle inductively coupled plasma–mass spectrometry (SP-ICP-MS). We used water samples with various NOM concentrations, with and without the addition of 1 × 107 particles L−1 nanoplastics. Our results indicate that nanoplastics in low NOM samples (<1 mg·C L−1) could be successfully quantified. However, in high NOM samples (>15 mg·C L−1), only 13–19% of added nanoplastics were successfully quantified. Further digestion to remove NOM yielded only 10% of spiked nanoplastics. This discrepancy in high NOM samples could likely be attributed to the competition between nanoplastics and NOM existing in the water sample to bind with Au-gel NPs. Our study highlights the suitability of the Au-gel labelling method for quantifying nanoplastics in low NOM water samples. Nevertheless, further optimization, including pre-digestion steps, is essential to apply this method for high NOM water samples effectively.

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Jiménez, María S., Mariam Bakir, Khaoula Ben-Jeddou, Eduardo Bolea, Josefina Pérez-Arantegui y Francisco Laborda. "Comparative study of extraction methods of silver species from faeces of animals fed with silver-based nanomaterials". Microchimica Acta 190, n.º 6 (9 de mayo de 2023). http://dx.doi.org/10.1007/s00604-023-05777-0.

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AbstractExtractions methods based on ultrapure water, tetramethylammonium hydroxide (TMAH), and tetrasodium pyrophosphate (TSPP) were applied to faeces collected from two in vivo experiments of pigs and chickens fed with a silver-based nanomaterial to study the fate and speciation of silver. For TMAH extraction, cysteine and CaCl2 were used to evaluate their stabilization effect on the silver forms. The analytical techniques single-particle inductively coupled plasma mass spectrometry (SP-ICP-MS), hydrodynamic chromatography hyphenated to ICP-MS (HDC-ICP-MS) and asymmetric flow field flow fractionation coupled to ICP-MS (AF4-ICP-MS) were applied to the simultaneous detection of particulate and dissolved silver. Results have shown that water extraction was a suitable option to assess the environmental release of silver, with percentages of 3 and 9% for faeces of pigs and chickens, respectively. The use of TMAH extraction combined with SP-ICP-MS analysis was useful to characterize Ag-containing particles (less than 1%). Both stabilizers, cysteine and CaCl2, have a similar effect on silver nanoparticle preservation for chicken faeces, whereas cysteine-Triton was better for pig samples. In any case, silver extraction efficiency with TMAH was low (39–42%) for both types of faeces due to a matrix effect. TSPP followed by ICP-MS enabled the fractionation of the silver in the faeces, with silver sulphide (41%) and ionic silver (62%) being the most abundant fractions. Graphical Abstract

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López-Mayán, Juan José, Blanca Álvarez-Fernández, Elena Peña-Vázquez, María Carmen Barciela-Alonso, Antonio Moreda-Piñeiro, Julie Maguire, Mick Mackey et al. "Bioaccumulation of titanium dioxide nanoparticles in green (Ulva sp.) and red (Palmaria palmata) seaweed". Microchimica Acta 190, n.º 8 (7 de julio de 2023). http://dx.doi.org/10.1007/s00604-023-05849-1.

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AbstractA bioaccumulation study in red (Palmaria palmata) and green (Ulva sp.) seaweed has been carried out after exposure to different concentrations of citrate-coated titanium dioxide nanoparticles (5 and 25 nm) for 28 days. The concentration of total titanium and the number and size of accumulated nanoparticles in the seaweeds has been determined throughout the study by inductively coupled plasma mass spectrometry (ICP-MS) and single particle-ICP-MS (SP-ICP-MS), respectively. Ammonia was used as a reaction gas to minimize the effect of the interferences in the 48Ti determination by ICP-MS. Titanium concentrations measured in Ulva sp. were higher than those found in Palmaria palmata for the same exposure conditions. The maximum concentration of titanium (61.96 ± 15.49 μg g−1) was found in Ulva sp. after 28 days of exposure to 1.0 mg L−1 of 5 nm TiO2NPs. The concentration and sizes of TiO2NPs determined by SP-ICP-MS in alkaline seaweed extracts were similar for both seaweeds exposed to 5 and 25 nm TiO2NPs, which indicates that probably the element is accumulated in Ulva sp. mainly as ionic titanium or nanoparticles smaller than the limit of detection in size (27 nm). The implementation of TiO2NPs in Ulva sp. was confirmed by electron microscopy (TEM/STEM) in combination with energy dispersive X-Ray analysis (EDX). Graphical abstract

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