Relevant bibliographies by topics / Solid-phase micro-extraction

Academic literature on the topic 'Solid-phase micro-extraction'

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Published: 4 June 2021
Last updated: 5 February 2022

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Journal articles on the topic "Solid-phase micro-extraction"

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Kanafusa, Sumiyo. "Solid Phase Micro Extraction: SPME." Nippon Shokuhin Kagaku Kogaku Kaishi 65, no. 4 (2018): 215. http://dx.doi.org/10.3136/nskkk.65.215.

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Chisvert, Alberto, Soledad Cárdenas, and Rafael Lucena. "Dispersive micro-solid phase extraction." TrAC Trends in Analytical Chemistry 112 (March 2019): 226–33. http://dx.doi.org/10.1016/j.trac.2018.12.005.

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Zarabi, Sanaz, Rouhollah Heydari, and Sayed Zia Mohammadi. "Dispersive micro-solid phase extraction in micro-channel." Microchemical Journal 170 (November 2021): 106676. http://dx.doi.org/10.1016/j.microc.2021.106676.

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Lasarte-Aragonés, Guillermo, Rafael Lucena, Soledad Cárdenas, and Miguel Valcárcel. "Effervescence-assisted dispersive micro-solid phase extraction." Journal of Chromatography A 1218, no. 51 (December 2011): 9128–34. http://dx.doi.org/10.1016/j.chroma.2011.10.042.

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Otu, Emmanuel O., and Janusz Pawliszyn. "Solid phase micro-extraction of metal ions." Mikrochimica Acta 112, no. 1-4 (January 1993): 41–46. http://dx.doi.org/10.1007/bf01243319.

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Jayasinghe, G. D. Thilini Madurangika, and Antonio Moreda-Piñeiro. "Molecularly Imprinted Polymers for Dispersive (Micro)Solid Phase Extraction: A Review." Separations 8, no. 7 (July 6, 2021): 99. http://dx.doi.org/10.3390/separations8070099.

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The review describes the development of batch solid phase extraction procedures based on dispersive (micro)solid phase extraction with molecularly imprinted polymers (MIPs) and magnetic MIPs (MMIPs). Advantages and disadvantages of the various MIPs for dispersive solid phase extraction and dispersive (micro)solid phase extraction are discussed. In addition, an effort has also been made to condense the information regarding MMIPs since there are a great variety of supports (magnetite and magnetite composites with carbon nanotubes, graphene oxide, or organic metal framework) and magnetite surface functionalization mechanisms for enhancing MIP synthesis, including reversible addition-fragmentation chain-transfer (RAFT) polymerization. Finally, drawbacks and future prospects for improving molecularly imprinted (micro)solid phase extraction (MIMSPE) are also appraised.
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Snow, Nicholas H. "Solid-phase micro-extraction of drugs from biological matrices." Journal of Chromatography A 885, no. 1-2 (July 2000): 445–55. http://dx.doi.org/10.1016/s0021-9673(00)00192-8.

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Erdem-Şenatalar, Ayşe, John A. Bergendahl, and Robert W. Thompson. "Observations on solid phase micro-extraction for MTBE analysis." Chemosphere 57, no. 6 (November 2004): 523–27. http://dx.doi.org/10.1016/j.chemosphere.2004.06.031.

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Famiglini, Giorgio, Helga Trufelli, Elisabetta Pierini, Elisa De Simoni, Filippo Mangani, and Achille Cappiello. "Comparison of Solid-Phase Extraction and Micro-Solid-Phase Extraction for Liquid Chromatography/Mass Spectrometry Analysis of Pesticides in Water Samples." Journal of AOAC INTERNATIONAL 86, no. 5 (September 1, 2003): 941–46. http://dx.doi.org/10.1093/jaoac/86.5.941.

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Abstract Our recent on-line solid-phase extraction (SPE) device for micro-liquid chromatography, known as micro-solid-phase extraction (μSPE), was compared with traditional SPE for the analysis, from aqueous samples, of 4 pesticides belonging to different classes. Two different kinds of adsorbents, C18 and graphitized carbon black, were tested. A 2-stage ion trap mass spectrometer, equipped with homemade microflow electrospray ion (ESI) source, was used. Detection limits with a signal-to-noise ratio of 3:1 for both extraction methods were in the range of 0.1 μg/L for all compounds. However, better recoveries were obtained when μSPE traps were used.
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Arghavani-Beydokhti, Somayeh, Maryam Rajabi, and Alireza Asghari. "Application of syringe to syringe dispersive micro-solid phase extraction using a magnetic layered double hydroxide for the determination of cadmium(ii) and lead(ii) ions in food and water samples." Analytical Methods 10, no. 11 (2018): 1305–14. http://dx.doi.org/10.1039/c7ay01857f.

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In this work, a new mode of dispersive solid-phase extraction named syringe to syringe magnetic dispersive micro-solid phase extraction is presented as an efficient and eco-friendly sample extraction method.
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Dissertations / Theses on the topic "Solid-phase micro-extraction"

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Lang, Susann-Cathrin. "Bioavailability of HOCs in marine sediments : application of solid phase micro-extraction." Thesis, University of the West of Scotland, 2015. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.731775.

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CEYLAN, OZCAN. "ELECTROCHEMICALLY-AIDED CONTROL OF SOLID PHASE MICRO-EXTRACTION (EASPME) USING CONDUCTING POLYMER COATED FIBER." University of Cincinnati / OhioLINK, 2003. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1069853643.

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Ahmadi, Svensson Mozhgan. "Sampling and Analysis of Tars by Means of Photo Ionization Detection and Solid Phase Micro Extraction." Doctoral thesis, KTH, Kemisk apparatteknik, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-131115.

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Gasification of biomass will likely play an important role in the production of energy and chemicals in a future sustainable society. However, during gasification impurities, such as tars, will be formed. Tars may cause fouling and blockages of equipment downstream the gasifier. It is therefore important to minimize the formation of tars, alternatively to remove the formed tars. These processes need to be monitored, which makes it necessary to develop tar analysis methods suitable for this task. This work describes the development of two tar analysis methods, an on-line method based on a photoionization detector (PID) and an off-line method based on solid phase microextraction (SPME). Both methods were successfully validated against the established solid phase adsorption (SPA) method. The method based on PID was shown to have a very fast response time. Furthermore, the PID method is selective towards tar, but only limited information will be obtained regarding the composition of the tar compounds. The PID method is suitable for applications where it is important to detect fast changes of the tar concentration, i.e. process monitoring. The SPME method was shown to be a very sensitive method for qualitative and quantitative tar analysis. The sampling temperature was shown to be crucial for obtaining analysis results with the wanted detection limit. The SPME method is suitable for applications where extremely low detection and quantification limits are needed, i.e. for syngas production.

QC 20131009

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Silva, Ana Claudia Lemes da. "Tipificação de meis brasileiros por micro-extração em fase solida combinada com cromatografia gasosa (SPME-CG)." [s.n.], 2006. http://repositorio.unicamp.br/jspui/handle/REPOSIP/250209.

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Orientador: Fabio Augusto
Tese (doitorado) - Universidade Estadual de Campinas, Instituto de Quimica
Made available in DSpace on 2018-08-11T06:52:57Z (GMT). No. of bitstreams: 1 Silva_AnaClaudiaLemesda.pdf: 2973527 bytes, checksum: 8d640c252ae8364f2e60128332ab484c (MD5) Previous issue date: 2006
Resumo: O mel é uma das misturas mais complexas de carboidratos produzida pela natureza. É um alimento energético muito importante pelas suas propriedades nutritivas, pelo seu aroma e sabor que dependem fortemente das plantas, flores e condições climáticas presentes na região geográfica onde está localizada a colméia. Não existem metodologias que possibilitem identificação não subjetiva, rápida e confiável da origem floral do mel. O objetivo deste trabalho foi desenvolver uma metodologia que permitisse a identificação da origem floral de méis brasileiros a partir da caracterização química de sua fração de voláteis utilizando micro-extração em fase sólida através do headspace e cromatografia gasosa (HS-SPME-CG). Para o desenvolvimento da metodologia, foram avaliadas 90 amostras de méis brasileiros de vinte origens florais diferentes e variadas procedências geográficas. Onze destas amostras eram unitárias e permitiram apenas um estudo exploratório. Cada tipo de mel apresentou um perfil cromatográfico diferente. Foram identificados potenciais marcadores para os méis de eucalipto (Eucalyptus sp), laranja (Citrus sp), assa-peixe (Vernonia polianthes), cambará (Lantana montevidensis), morrão de candeia (Croton sp) e marmeleiro (Cydonia vulgaris). Os resultados obtidos mostraram que SPME-CG é útil na tipificação de méis e pode eventualmente ser utilizada na sua certificação
Abstract: Honey is one of the most complex mixtures of carbohydrates produced by Nature. It is a very important energetic food for its nutritional properties and for its aroma and flavor that depend strongly on the fauna, flowers and on the climatic conditions in the geographic region where the beehive is located. There are no objective, fast and reliable methodologies for the identification of the floral source of honeys. The objective of this work was to develop a methodology to allow identification of the floral source of Brazilian honeys through characterization of its volatile fraction using headspace solid phase microextraction and gas chromatography (HS-SPME-GC). To develop the methodology, 90 samples of Brazilian honeys of twenty different botanical sources and several geographic locations were employed. Eleven honey types had just one sample, allowing only exploratory studies. Different chromatographic profiles were obtained for honeys from different floral sources. Potential chemical markers were identified for the honeys of eucaliptus (Eucalyptus sp), orange (Citrus sp), assa-peixe (Vernonia polianthes), lantana (Lantana montevidensis), morrão of candeia (Croton sp) and quince (Cydonia vulgaris). The results obtained showed that SPME-GC is useful to identify the floral origin of honey and may eventually be used for its certification
Tese (doitorado) - Universidad
Quimica Analitica
Doutor em Ciências
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Schebywolok, Tomi. "Application of Relative Response Factors in Solid-Phase Micro Extraction GC/MS for the Determination of Polycyclic Aromatic Hydrocarbons in Water." Thesis, Université d'Ottawa / University of Ottawa, 2018. http://hdl.handle.net/10393/37860.

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Solid-phase microextraction (SPME) coupled with gas chromatography/mass spectrometry (GC/MS) is routinely used to analyze polycyclic aromatic hydrocarbons (PAHs) in water. A common SPME-GC/MS approach quantifies target analytes using isotopically labeled standards (IISs); one IIS is needed for each target analyte. This approach is challenging, even prohibitive since IISs are often expensive; moreover, they are generally not available for each analyte of interest. This study developed a novel SPME-GC/MS approach for the quantification of PAHs in water. The new method, which employs only a small number of IISs, uses relative response factor (RRF) (i.e., analyte corresponding to IIS) to quantify PAHs in water. Possible matrix dependency of RRFs values was examined using water that was modified concerning different physical-chemical characteristics (i.e., ionic strength, pH, suspended solids, humic acid, and biological organic carbon represented by hemoglobin). The results revealed that RRFs are not noticeably affected by changing ionic strength and pH; the other three parameters did affect the RRFs. However, the results also showed that the effect is minimal when the solution is dilute (i.e., low concentrations of suspended solids, humic acid or hemoglobin). Relatively stable RRFs for dilute water solutions indicates that this approach can be used for routine quantification of water that does not contain prohibitive amounts of suspended solids, humic acid, and biological organic matter. The developed method was employed to quantify trace levels of PAHs in three different types of water, namely river water, well water, and bottled water. PAH levels in every kind of water were less than 100 ng/L level (i.e., 0.1 ppb). Analyses of spiked water samples containing 2 ng PAHs revealed correlations between calculated RRFs and the physical-chemical properties of the PAHs investigated (i.e., vapor pressure, boiling point, octanol/water partition coefficient, octanol/air partition coefficient, GC retention time). This implies that RRFs for PAHs not examined in this study can be predicted. Overall, the results presented herein constitute a meaningful contribution to the development of SPME-GC/MS methods for quantitative analysis of PAHs and other chemicals in dilute aqueous solutions. Moreover, the development of methods that alleviate the need for IISs corresponding to each target analyte.
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Andersson, Johan. "Odour Communication in Pieris Butterflies." Doctoral thesis, KTH, Chemistry, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3699.

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Jajuli, Maizatul Najwa. "Extraction liquid-liquide modulée électrochimiquement et microextraction en phase solide de composés pharmaceutiques sélectionnés." Electronic Thesis or Diss., Université de Lorraine, 2019. http://www.theses.fr/2019LORR0127.

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Les méthodes classiques de préparation d'échantillons pour la détermination de composés polaires, telles que l'extraction liquide-liquide (LLE) et l'extraction en phase solide (SPE), ne sont généralement pas efficaces en raison de multiples étapes, d’une faible récupération et d’une consommation élevée de solvants organiques. Cette thèse traite du développement de nouvelles méthodes de préparation d’échantillons, à savoir l’extraction par voie liquide-liquide modulée électrochimiquement (EMLLE) et l’extraction bar-micro en phase solide (bar-μ-SPE) afin de déterminer les composés pharmaceutiques metformine (MET), buformine (BUF), phénformine (PHEN) et propranolol (PROP). Dans la méthode EMLLE, un champ électrique a été appliqué pour extraire les composés pharmaceutiques ionisés à travers l’interface entre deux solutions électrolytiques non miscibles (ITIES). Des ITIES se forment lorsque deux solvants en vrac en phase aqueuse (chlorure de lithium) et en phase organique (I, 2-dichloroéthane), contenant l’électrolyte, sont mis en contact. Le potentiel de transfert pour chaque analyte a été analysé par voltamétrie. Le potentiel de transfert varie avec leur lipophilie; propranolol
Conventional sample preparation methods for the determination of polar compounds such as liquid-liquid extraction (LLE) and solid phase extraction (SPE) are generally not effective because of their multiple steps, low recovery and high consumption of organic solvents. Thus, this thesis deals with the development of new sample preparation methods, i.e, electrochemically modulated liquid-liquid extraction (EMLLE) and bar-micro solid phase extraction (bar-μ-SPE) to determine selected pharmaceutical compounds, i.e., metformin (MET), buformin (BUF), phenformin (PHEN), and propranolol (PROP) having varied lipophilicity in biological samples. In the EMLLE method, the aid of electric field was utilized to extract the pharmaceutical compounds across the interface between two immiscible electrolyte solutions (ITIES). ITIES formed when two bulk solvents aqueous phase (lithium chloride) and organic phase (I,2-dichloroethane), both containing electrolytes are brought into contact. Transfer potential for each analyte was analysed by voltammetry. The trend of transfer potential followed their lipophilicity; propranolol < phenformin < phenyl biguanide < metformin. Extraction of the analytes was performed by applying fixed potential to the biphasic system using potentiostat for 15 mins. The extraction performance was poor. Design of another ITIES cell and imposing interfacial potential by chemical polarization was done to enhance the extraction performance of this method. Thus, the EMLLE technique based on application of interfacial potential due to the presence of different concentrations of tetramethylammonium ion (TMA+) as common ion in each phase was studied. The optimum extraction conditions for this method are, [TMA+]o = 10 mM, [TMA+]w = 0.001 mM, Vorg = 2 mL, pHsample = 9, rotation speed = 900 rpm, extraction time = 600 s. The optimised parameters for back-extraction are: [TMA+]back = 50 mM, Vfinal = 0.1 mL, pHback = 2 . Nearly 100 % extraction of targeted analytes was achieved, and the enrichment factor obtained was up to ~ 60 for biguanide compounds. In the bar-μ -SPE method, adsorbent and a tiny metal rod was placed in a polypropylene membrane bag. Among the various adsorbents studied, graphene and zeolite showed some potential. Thus, extraction conditions were optimised for each adsorbent and adsorbent mixture. Despite the optimisations, the extraction was low (5.03-39.2 %). Nevertheless, enrichment factors of 1.49 -14.9 were obtained. Both proposed methods were applied to the determination of the analytes in urine. On the whole, the newly proposed methods are simple and markedly reduced consumption of organic solvents
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Huertas-Rivera, Adhly M. "Identification of the Active Odors From Illicit Substances for the Development of Optimal Canine Training Aids." FIU Digital Commons, 2016. http://digitalcommons.fiu.edu/etd/2990.

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The exploitation of illicit substances, such as drugs and explosives, is on the rise. Special attention must therefore be considered to reduce the transportation and storage of these illicit substances by improving the capability of detection, even when hidden from view. Although analytical methods of detection for both drugs and explosives have improved over time, biological detectors, such as canines, are still commonly used. In comparison to humans, these canines have a larger number of olfactory receptors and a greater olfactory epithelium surface area, providing them with a more enhanced olfaction than that of humans. The premise for the detection of illicit drugs and explosives is based on the premise that these substances though hidden, will emit volatile organic compounds (VOCs). These VOCs are not often the parent drug or explosive, they are essentially a chemical associated with the source and provide a reliable indication of the illicit substance. Previous successful research has been conducted on the identification of the active odors present in the headspace of cocaine, methamphetamine, and MDMA but instead for marijuana and heroin there have been minimum success. Thus, in the present research a method using headspace solid-phase microextraction coupled to gas chromatography-mass spectrometry (HS-SPME-GC-MS) was optimized to identify the VOCs makeup of heroin and marijuana to further identify the active odor compound(s) responsible for the alert response of biological detectors (canines). A mixture of acetic acid and acetylsalicylic acid was identified as target odor mimic for heroin by certified detector canines, while a mixture of limonene and caryophyllene was recognized as odor mimic for marijuana by conducting ORTs. The training aids developed successfully mimic the scent of the actual illicit substance and can be used to improve the capabilities of both drug and explosive detection canines. Additionally, as growing threat of improvised explosives has created a worldwide concern and emphasized the requirement of a greater spectra of canine training aids that covers the complete range of explosives available, a new approach for the creation of training aids for IEDs have been evaluated. The use of a dynamic collection system have proved to be an option to develop fast and reliable canine training aids for IEDs.
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Rohanifar, Ahmad. "Conductive Polymers for Electrochemical Analysis and Extraction." University of Toledo / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1544809010837595.

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Ribeiro, Aline Larissa Campos Fernandes. "Estudo de aromas de algumas espécies frutíferas Amazônicas pela técnica de HS-SMPE-GC-MS." Universidade Federal do Amazonas, 2015. http://tede.ufam.edu.br/handle/tede/5676.

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The need to identify the volatile composition of food is growing every year, mainly driven by the industry. The volatile compounds present in food is very important because they are responsible for their characteristic aroma, which in turn contributes to the taste and consequently to the attraction for the food. The attractive taste of tropical fruits is increasing the consumption of these fruits worldwide, and hence the aroma and flavor of these fruits are getting attention of the industry. Considering this growing interest and the fact that the aroma of most amazonian fruits have not yet been studied, the aim of this study was the characterization of the aroma of three Amazon edible fruits consumed in Manaus region: banana pacovan (Musa paradisiaca L), cajarana (Spondias dulcis Park) and cubiu (Solanum sessiliflorum Dunal). The volatile compounds were extracted by Headspace Solid Phase Microextraction technique and the components were separated and identified by high resolution gas chromatography coupled to mass spectrometry. Two types of commercial SPME fibers were used, CAR-PDMS and PDMS, to compare their efficiency. The extraction capability for each fiber has varied, PDMS fiber was able to extract more components for banana and cubiu, whereas CAR-PDMS for cajarana. Alcohols, aldehydes and esthers were identified in all three fruits, and esthers were more present in cubiu. Terpenes were identified solely in cajarana and carboxylic acids were present only in banana pacova aroma.
A necessidade do conhecimento da composição dos voláteis em alimentos vem crescendo a cada ano, principalmente impulsionada pela indústria. As substâncias voláteis presentes em um alimento são importantes, pois são elas que conferem o seu aroma característico, que por sua vez contribui para o sabor e consequentemente pela atração pelo alimento. O sabor atrativo das frutas tropicais está estimulando o consumo destas frutas em todo o mundo e, devido a isso, o aroma e sabor destes frutos vêm chamando a atenção das indústrias, demonstrando o interesse na caracterização de cada uma delas. Tendo em vista esse grande interesse e o fato do aroma da maioria dos frutos exóticos amazônicos não terem sido estudados ainda, este trabalho teve como objetivo a caracterização do aroma de três frutos comestíveis adquiridos na região de Manaus: banana pacovan (Musa paradisiaca L), cajarana (Spondias dulcis Park) e cubiu (Solanum sessiliflorum Dunal). Os componentes voláteis foram extraídos utilizando a técnica de microextração em fase sólida por “headspace” e a identificação foi realizada através de análises por cromatografia gasosa de alta resolução acoplada com espectrometria de massas. Para a extração dos voláteis, dois tipos de recobrimento de fibra foram utilizados, CAR-PDMS e PDMS, que são normalmente utilizadas nas análises de voláteis. Os resultados obtidos para análise dos aromas de todos os frutos estudados mostraram que a quantidade de substâncias extraídas variou entre as fibras. Os resultados para a banana e para o cubiu apresentaram maior quantidade de componentes extraídos com a fibra PDMS, enquanto para a cajarana foi obtido com a fibra CAR-PDMS. Nos três frutos foram identificadas substâncias voláteis pertencentes à classe de álcoois, aldeídos e ésteres, que foi a principal classe encontrada em todas as análises, principalmente no cubiu. Terpenos foram identificados apenas no aroma da cajarana e ácidos carboxílicos apenas no aroma da banana pacovan.
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Book chapters on the topic "Solid-phase micro-extraction"

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Vidal, C., and W. R. Külpmann. "Solid-phase Micro-Extraction." In Springer Reference Medizin, 2180. Berlin, Heidelberg: Springer Berlin Heidelberg, 2019. http://dx.doi.org/10.1007/978-3-662-48986-4_2843.

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Vidal, C., and W. R. Külpmann. "Solid-phase Micro-Extraction." In Lexikon der Medizinischen Laboratoriumsdiagnostik, 1. Berlin, Heidelberg: Springer Berlin Heidelberg, 2018. http://dx.doi.org/10.1007/978-3-662-49054-9_2843-1.

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Say, R&imathdvan, Rüstem Keçili, and Arzu Ersöz. "Molecularly Imprinted Polymer-based Micro- and Nanotraps for Solid-phase Extraction." In Advanced Molecularly Imprinting Materials, 129–63. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2016. http://dx.doi.org/10.1002/9781119336181.ch4.

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Kader, Mohammad Salauddin, and Md Ramim Tanver Rahman. "Supercritical Fluid Extraction (SFE), Solid-Phase Micro Extraction (SPME), and Stir Bar Sorption Extraction (SBSE) Techniques." In Techniques to Measure Food Safety and Quality, 219–27. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-68636-9_10.

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Grimm, Casey C., Mary An Godshall, Terry J. Braggins, and Steven W. Lloyd. "Screening for Sensory Quality in Foods Using Solid Phase Micro-Extraction Tandem Mass Spectrometry." In Advances in Experimental Medicine and Biology, 167–74. Boston, MA: Springer US, 2004. http://dx.doi.org/10.1007/978-1-4419-9090-7_11.

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Araniti, Fabrizio, Sebastiano Pantò, Antonio Lupini, Francesco Sunseri, and Maria Rosa Abenavoli. "Chemical Characterization of Volatile Organic Compounds (VOCs) Through Headspace Solid Phase Micro Extraction (SPME)." In Advances in Plant Ecophysiology Techniques, 401–17. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-93233-0_24.

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Verhoeven, Harrie A., Harry Jonker, Ric C. H. De Vos, and Robert D. Hall. "Solid Phase Micro-Extraction GC–MS Analysis of Natural Volatile Components in Melon and Rice." In Methods in Molecular Biology, 85–99. Totowa, NJ: Humana Press, 2011. http://dx.doi.org/10.1007/978-1-61779-594-7_6.

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Jayasinghe, G. D. Thilini Madurangika, and Antonio Moreda-Piñeiro. "Molecularly Imprinted Polymer for a Smart Dispersive Micro-Solid Phase Extraction Technique for Assessing Trace Level in." In Molecularly Imprinted Polymers, 141–52. New York, NY: Springer US, 2021. http://dx.doi.org/10.1007/978-1-0716-1629-1_12.

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Snyder, Janet M., Jerry W. King, and Zhouyao Zhang. "Comparison of Volatile Analysis of Lipid-Containing and Meat Matrices by Solid Phase Micro- and Supercritical Fluid-Extraction." In ACS Symposium Series, 107–15. Washington, DC: American Chemical Society, 1998. http://dx.doi.org/10.1021/bk-1998-0705.ch010.

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Senkans, Paul D., Vern de Biasi, and David A. Barrow. "Computational Simulations of Fluid Flow Dynamics, and Bead Packing in Solid Phase Extraction Microsystems." In Micro Total Analysis Systems 2002, 76–78. Dordrecht: Springer Netherlands, 2002. http://dx.doi.org/10.1007/978-94-010-0295-0_25.

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Conference papers on the topic "Solid-phase micro-extraction"

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Zia, Asif I., Nasrin Afsarimanesh, Li Xie, Anindya Nag, I. H. Al-Bahadly, P. L. Yu, and Jurgen Kosel. "Improved detection limits for phthalates by selective solid-phase micro-extraction." In 2015 9th International Conference on Sensing Technology (ICST). IEEE, 2015. http://dx.doi.org/10.1109/icsenst.2015.7438493.

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Han, Song-I., Hwanyoung Lee, and Ki-Ho Han. "A Fully Automated Micro-Solid Phase Extraction Chip for Genetic Sample Preparation System." In 2009 IEEE 22nd International Conference on Micro Electro Mechanical Systems. MEMS 2009. IEEE, 2009. http://dx.doi.org/10.1109/memsys.2009.4805380.

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Lozano, Jesus, Jose Ignacio Suarez, Jose Manuel Ordiales, and Teodoro Aguilera. "Detection of TATP precursors with MOX gas sensors combined with Solid Phase Micro Extraction." In 2013 IEEE Sensors. IEEE, 2013. http://dx.doi.org/10.1109/icsens.2013.6688527.

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Zhang, Yan, Jiao Chen, Yanling Yang, and Xing Li. "Determination of Odor Compounds by Using Headspace Solid-Phase Micro Extraction Combined with GC-MS." In 2010 International Conference on E-Product E-Service and E-Entertainment (ICEEE 2010). IEEE, 2010. http://dx.doi.org/10.1109/iceee.2010.5660538.

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Zhang, Yi, and Tza-Huei Wang. "Geomorphology-assisted manipulation of magnet-actuated droplet for solid phase DNA extraction and droplet-in-oil PCR." In 2010 IEEE 23rd International Conference on Micro Electro Mechanical Systems (MEMS). IEEE, 2010. http://dx.doi.org/10.1109/memsys.2010.5442389.

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Zhang, Yi, and Tza-Huei Wang. "An automated all-in-one microfludic device for parallel solid phase DNA extraction and droplet-inoil PCR analysis." In 2010 IEEE 23rd International Conference on Micro Electro Mechanical Systems (MEMS). IEEE, 2010. http://dx.doi.org/10.1109/memsys.2010.5442370.

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Nguyen, ThaiHuu, and Qiao Lin. "Thermally Responsive Aptamer Surfaces for Microfluidic Sample Preparation." In 2008 Second International Conference on Integration and Commercialization of Micro and Nanosystems. ASMEDC, 2008. http://dx.doi.org/10.1115/micronano2008-70264.

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For many bioanalytical systems, the quality of the sample under scrutiny greatly affects the success of its analysis by the analytical instrument. Thus, sample preparatory techniques such as solid-phase extraction (SPE), purification and concentration are used to improve the quality of the sample before introduction into the equipment. This work overviews our effort in developing microdevices which exploit thermally responsive aptamers for biomolecular sample extraction, purification and concentration. We demonstrate the feasibility of this approach with a model system which consists of an adenosine monophosphate (AMP) analyte and adenosine triphosphate derived aptamer. Through systematic experimentation, we demonstrate the extraction and enrichment of AMP at physiologically relevant concentrations, release of AMP and regeneration of the aptamer through thermal stimulation, and detection of AMP by either fluorescence or mass spectrometry. In addition, completely aqueous operation of the device eliminates the use of potentially harsh reagents.
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Ou, Junjie, Shuwen Wang, Carolyn L. Ren, and Janusz Pawliszyn. "Preparation of Poly(Dimethylsiloxane) Chip-Based Cartridge for Isoelectric Focusing and Whole-Channel Imaging Detection." In 2008 Second International Conference on Integration and Commercialization of Micro and Nanosystems. ASMEDC, 2008. http://dx.doi.org/10.1115/micronano2008-70303.

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A poly(dimethylsiloxane) (PDMS) microfluidic chip-based cartridge was fabricated by sandwiching commercial dialysis membrane and inserting fused-silica capillary into the end of channel according to the principle and structure of a commercial fused-silicon capillary-based cartridge, which can adapt to an IEF analyzer for isoelectric focusing with whole channel imaging detection (IEF-WCID). The novel design of sandwiching membrane in this chip not only eliminated the unfavorable hydrodynamic pressure, leading to poor IEF reproducibility, but made the sample injection much easy. Thus the reproducibility of analysis was very good. The prepared microfluidic chips were applied for qualitative and quantitative analysis of proteins. The six pI markers in the range of 3–10 were separated by IEF under the optimized conditions. The pH gradients exhibited good linear by plotting the pI versus peak position, and the correlation coefficient reached to 0.9994 and 0.9995. The separation of more complicated human hemoglobin control and myoglobin sample could be achieved. By comparison with the separation efficiency obtained on the microfluidic chip and commercial cartridge, the results were similar, which indicates the capillary cartridge may be replaced with the cost-efficient PDMS microfluidic chip. It is anticipated the high throughput analysis can be easily performed on this microfluidic chip patterned multi-channels. The techniques of capillary electrophoresis (CE) have been extensively explored for the chip-based separation. Isoelectric focusing (IEF) as one of high-resolution CE techniques has been widely applied for the separation of zwitterionic biomolecules, such as proteins and peptides. After the samples were focused at their corresponding pIs, the focused zones were mobilized to pass through the detection point for obtaining an electropherogram. This single-point detection imposes extensive restriction for chip-based IEF because a mobilization process requires additional time and lowers resolution and reproducibility of the separation [1]. An alternative is whole-column imaging detection developed by Pawliszyn et al [2] is an ideal detection method for IEF because no mobilization is required, which avoids the disadvantages as mentioned previously. Most microfluidic systems could be fabricated in glass/silicon or polymers in which the channels are defined using photolithography and micromachining. Mao and Pawliszyn [3] have developed a method for IEF on an etched quartz chip following whole-channel imaging detection (WCID). Ren et al [4] presented an integrated WCID system on glass microfluidic chip. However, these materials have some disadvantages such as expensive and fragile and so on. An attractive alternative for fabrication of microfluidic devices is using poly(dimethylsiloxane) (PDMS) as material, which has unique properties such as nontoxic, optical transparent down to 280 nm, elastomeric, hydrophobic surface chemistry Yao et al. [5] designed the glass/PDMS microchip integrated whole-column fluorescence imaging detection for IEF of R-phycoerythrin. Our preliminary studies have successfully developed a PDMS chip-based cartridge for IEF-WCID. It is due to hydrodynamic flow between two reservoirs that the focused zones were mobilized, thus gave poor reproducibility and difficulty in sample infusion. As membranes have been integrated into microchips for microdialysis, protein digestion, solid-phase extraction, desalting, pumping and so on, it could minimize hydrodynamic flow by using membranes as a filter. Although a simple PDMS chip-based cartridge has been successfully fabricated in our labs according to the principle of commercial capillary-based cartridge, it is difficult to introduce the sample into channel for IEF-WCID. As the vacuum was applied in one end of channel for infusing of solution into channel, the lifetime of this chip-based cartridge is shortened. Additionally, the hydrodynamic flow is occurred due to the different heights of anolyte and catholyte in two reservoirs, respectively. The IEF separation was deteriorated by the infusion of anolyte or catholyte, thus leading to poor reproducibility of IEF-WCID analysis. Similar to the hollow fiber in the commercial capillary-based cartridge in which it is aimed to separate the sample in the capillary and electrolytes in the reservoirs, porous membrane was integrated into PDMS chips for decrease of hydrodynamic flow [6]. As a result, integration of dialysis membrane is considered into the design of our new chip-based cartridge. Up to now, many approaches have been described to integrate membranes into glass/quartz or polymeric microfluidic chips. A simple method is direct incorporation by gluing or clamping commercial flat membranes. A major problem of this method is sealing, otherwise, a phenomenon of leakage around the membranes is always occurred due to the capillary force. A novel approach of sandwiching dialysis membrane was developed as schematically indicated in Figure 1. After optimizing IEF conditions, the separation of pI markers was performed on the obtained PDMS microfluidic chip. As exhibited in Figure 2a, six pI markers could be well separated on the PDMS chips patterned the channel of 100 μm deep, 100 μm wide by IEF-WCID. All the peaks were sharp and symmetric, indicating that both EOF and analytes adsorption were completely suppressed by the dynamic coating of PVP. The plots of peak position versus pI of these pI markers suggested good linearity of pH gradient (as shown in Figure 2b). The linear correlation coefficient was 0.9995 (n = 6). As expected to the capillary-based cartridge, the PDMS microfluidic chips could be applied for qualitative and quantitative analysis of proteins. Figure 3a exhibited that human hemoglobin control AFSC contains four known isoforms (HbA, HbF, HbS and HbC) mixed with two pI marker 6.14 and 8.18 were well separated on the PDMS chip by IEF-WCID, indicating the strong separation ability of chip similar to the commercial capillary-based cartridge. According to the linearity of pH gradient, these four isoforms with the pIs of 7.0, 7.1, 7.3 and 7.5, respectively, could be detected. An unknown isoform in human hemoglobin control marked asterisk in Figure 3A observed besides the definite four isoforms A, F, S and C. The myoglobin from horse heart contains two isoforms, whose pIs are 6.8 and 7.2, respectively. It can be seen from Figure 3b that these two isoforms were separated on PDMS chip by IEF-WCID. The peak 1 and 2 could be assigned to the two isoforms according to their pI. The pI of unknown peak marked asterisk could be measured to 6.25.
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