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Auswahl der wissenschaftlichen Literatur zum Thema „Ion-selective electrode (ISE)“
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Zeitschriftenartikel zum Thema "Ion-selective electrode (ISE)"
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Thomas, J. D. R. „Devices for ion-sensing and pX measurements“. Pure and Applied Chemistry 73, Nr. 1 (01.01.2001): 31–38. http://dx.doi.org/10.1351/pac200173010031.
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Thirty years of ion-selective electrode (ISE) researches at the University of Wales, Cardiff are outlined. They summarize developments of PVC membrane ISEs, first for calcium and then of other systems, including the improved calcium dioctyl-phenyl-phosphate sensor for calcium and those of ion-exchangers, polyalkoxylates, and cyclic and acyclic polyethers for various anions and cations. Electrodes based on polyalkoxylates have interesting properties toward the polyethers themselves. Some ISE failure causes are discussed. Attention is given to applications, including analysis of wash liquors and nonionic surfactants, biomedical roles, and studies of sulfate-reducing bacteria activity. Coated-wire ISEs and ion-selective field effect transistors (ISFETs) are mentioned, as are other modes of ISE deployment. The review concludes with some fundamental features of PVC electrode membranes as determined by radiotracer, applied potential, and potentiostatic approaches.
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Saefurohman, Asep, Buchari und Indra Noviandri. „La(III) Ion Selective Electrode with PTFE Membrane Containing Tributyl Phosphate Ionophore“. Key Engineering Materials 874 (Januar 2021): 50–57. http://dx.doi.org/10.4028/www.scientific.net/kem.874.50.
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Methods for the quantitative determination of lanthanum that have been developed are generally spectroscopic methods such as inductively coupled plasma mass spectrometry (ICP-MS), inductively coupled plasma atomic emission spectrometry (ICP-AES), and X-ray fluorescence spectrometry, which has relatively high operational costs. The feasibility of the potentiometric method using ion selective electrode (ISE) as an alternative method for lanthanum (III) determination needs to be studied because it is simple, easy to use, and has high sensitivity and selectivity. In this study, we developed ion selective electrode using PTFE membrane impregnated with tributyl phosphate (TBP) as ionophore. TBP is commonly used as a complexing agent for rare-earth ions in supported liquid membrane (SLM) separation process. We found that the compound can be used as an ionophore for ISE. This study aims to make a lanthanum ion selective electrode (III) (La-ISE) which has a Nernstian response. The parameters studied in the construction of this electrode were the effects of PTFE membrane immersion ionophore solution, ionic strength adjuster (ISA), and the inner solution composition. The performance parameters studied for the La-ISE were linear range, response time, detection limit, selectivity, and the lifetime of the electrode. Construction of the electrode begins with the preparation of the PTFE membrane as the main component. PTFE membrane was impregnated for 12 hours in the TBP solution having a concentration of 0.25 M or 0.50 M in kerosene. After it was dried, the membrane was attached to the end of the electrode tube with adhesive. Then, the electrode was filled with an internal solution containing a mixture of KCl 10-3 M with La (III) 10-3 M. The internal reference electrode was Ag/AgCl electrode. Before it was used, the electrode was soaked in a solution of La (III) 10-3 M for 12 hours.The effect of TBP concentration on the electrode performance was studied using two concentrations of TBP: 0.25 M and 0.50 M. The calibration curves obtained using both electrodes have good linearity. Nernst factor obtained from both electrodes is similar, although the Nernst factor obtained with an electrode having 0.50 M TBP closer to the theoretical value.ISA used in the measurement was KNO3. The effect of ISA on the performance of the electrode was studied using electrodes containing TBP with the concentration of 0.25 M or 0.50 M. The concentration of KNO3 used in this study was 0.01 M and 0.10 M. The Nernst factors obtained with electrodes containing 0.25 M TBP, in general, higher than those obtained with electrodes containing 0.50 M TBP in the same ISA. Electrode containing 0.50 M TBP resulted in the Nernst factor close to theoretical value when a measurement was conducted in 0.10 M KNO3.
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Wu, Rongrong, Xue-Gang Chen, Chunhui Tao, Yuanfeng Huang, Ying Ye, Qiujin Wang, Yifan Zhou, Quan Jin und Wei Cai. „An All-Solid-State Silicate Ion-Selective Electrode Using PbSiO3 as a Sensitive Membrane“. Sensors 19, Nr. 3 (27.01.2019): 525. http://dx.doi.org/10.3390/s19030525.
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Ion-Selective Electrode (ISE) is an emerging technology for in situ monitoring of the chemical concentrations of an aqueous environment. In this work, we reported a novel all-solid-state silicate ISE, using an Ag/Pb/PbSiO3 electrode. This electrode responded to aqueous SiO32− with a reasonable slope of −31.34 mV/decade and a good reproductivity. The linear range covered from 10−5 M to 10−1 M, for the Na2SiO3 solutions and the response time was generally less than 5 s. Its potentiometric response to pH and silicate indicated that the prepared electrode was sensitive to silicate, rather than pH. Compared to the traditional liquid ISE, our all-solid-state silicate electrode was resistant to high pressure and could be used in situ, in deep water. In addition, the miniaturized electrodes (diameter of 0.4 mm and a length of 2–3 cm) could be easily integrated into a multi-modal sensor, which could simultaneously determine multiple parameters. Our prepared silicate ISE could potentially be used to determine the presence of silicate in a low-chloride aqueous environment, where the ISE exhibited better selectivity for silicate, over interfering ions such as, SO42−, NO3−, CH3COO−, CO32−, and PO43−.
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Urbanowicz, Marcin, Kamila Sadowska, Dorota G. Pijanowska, Radosław Pomećko und Maria Bocheńska. „Potentiometric Solid-Contact Ion-Selective Electrode for Determination of Thiocyanate in Human Saliva“. Sensors 20, Nr. 10 (15.05.2020): 2817. http://dx.doi.org/10.3390/s20102817.
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A new solid-contact potentiometric ion-selective electrode for the determination of SCN− (SCN-ISE) has been described. Synthesized phosphonium derivative of calix[4]arene was used as a charged ionophore. The research included selection of the ion-selective membrane composition, determination of the ISEs metrological parameters and SCN-ISE application for thiocyanate determination in human saliva. Preparation of the ISEs included selection of a plasticizer for the ion-selective membrane composition and type of the electrode material. The study was carried out using ISE with liquid internal electrolyte (LE-ISE) and solid-contact electrodes made of glassy carbon (GC-ISE) and gold rods (Au-ISE). The best parameters were found for GC sensors for which the ion-selective membrane contained chloroparaffin as a plasticizer (S = 59.9 mV/dec, LOD = 1.6 × 10−6 M). The study of potentiometric selectivity coefficients has shown that the thiocyanate-selective sensor could be applied in biomedical research for determination of SCN− concentration in human saliva. The accuracy of the SCN− determination was verified by testing 59 samples of volunteers’ saliva by potentiometric sensors and UV-Vis spectrophotometry as a reference technique. Moreover, SCN− concentrations in the smokers’ and non-smokers’ saliva were compared. In order to investigate the influence of various factors (sex, health status, taken medications) on the thiocyanate level in the saliva, more extensive studies on a group of 100 volunteers were carried out. Additionally, for a group of 18 volunteers, individual profiles of SCN− concentration in saliva measured on a daily basis for over a month were collected.
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Hassan, Eldin, Amr, Al-Omar, Kamel und Khalifa. „Improved Solid-Contact Nitrate Ion Selective Electrodes Based on Multi-Walled Carbon Nanotubes (MWCNTs) as an Ion-to-Electron Transducer“. Sensors 19, Nr. 18 (09.09.2019): 3891. http://dx.doi.org/10.3390/s19183891.
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Possible improvement of the performance characteristics, reliability and selectivity of solid-contact nitrate ion-selective electrodes (ISE) (SC/NO3−-ISE) is attained by the application of a nitron-nitrate (Nit+/NO3−) ion association complex and inserting multi-walled carbon nanotubes (MWCNTs) as an ion-to-electron transducer between the ion sensing membrane (ISM) and the electronic conductor glassy carbon (GC) substrate. The potentiometric performance of the proposed electrode revealed a Nernstian slope −55.1 ± 2.1 (r² = 0.997) mV/decade in the range from 8.0 × 10−8–1 × 10−2 M with a detection limit of 2.8 × 10−8 (1.7 ng/mL). Selectivity, repeatability and reproducibility of the proposed sensors were considerably improved as compared to the coated disc electrode (GC/NO3−-ISE) without insertion of a MWCNT layer. Short-term potential stability and capacitance of the proposed sensors were tested using a current-reversal chronopotentiometric technique. The potential drift in presence of a MWCNT layer decreased from 167 μVs−1 (i.e., in absence of MWCNTs) to 16.6 μVs−1. In addition, the capacitance was enhanced from 5.99 μF (in absence of MWCNTs) to 60.3 μF (in the presence of MWCNTs). The presented electrodes were successfully applied for nitrate determination in real samples with good accuracy.
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Brackett, J., B. Durley, R. Janczak, V. Kazlauskas, J. Kmiec, J. Norlie, R. Rosencranz, S. Schultz, T. Spring und W. Theusch. „Centrifugal ion-selective electrode system for potassium in whole blood“. Clinical Chemistry 36, Nr. 12 (01.12.1990): 2126–30. http://dx.doi.org/10.1093/clinchem/36.12.2126.
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Abstract We describe a novel ion-selective electrode (ISE) system that can be used in the Abbott Vision analyzer. A reusable sensor pack and a disposable test pack have been miniaturized to approximately the size and weight of a conventional Vision test pack, thus eliminating the need for a separate ISE module. The sensor pack contains a fluid path, battery-powered electronics, and screw-in electrodes. The test pack contains separate chambers and fluid channels for a blood specimen and two aqueous calibrators. During a run, plasma is separated from blood cells and is moved sequentially, along with the two calibrators, into and out of the sensor pack by centrifugal force. Each run includes checks for electromechanical integrity, fluid contamination, calibration slope and intercept, and specimen hemolysis. The system operates with CVs of less than 2% and gives results that correlate well with those by flame photometry and direct ISE methods. Either skin-puncture or venipuncture whole blood can be assayed, as well as serum or plasma.
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Zhang, Chuqing, Yang He, Jianbo Wu, Manqing Ai, Wei Cai, Ying Ye, Chunhui Tao, Pingping Zhang und Quan Jin. „Fabrication of an All-Solid-State Carbonate Ion-Selective Electrode with Carbon Film as Transducer and Its Preliminary Application in Deep-Sea Hydrothermal Field Exploration“. Chemosensors 9, Nr. 8 (23.08.2021): 236. http://dx.doi.org/10.3390/chemosensors9080236.
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Real-time measurements of carbonate ion concentrations in the ocean are critical to advancing marine environmental monitoring and research into deep-sea hydrothermal activity. Herein, we report the first example of deep-sea hydrothermal field exploration using a carbonate ion-selective electrode (ISE). The novel carbonate ISE was composed of a Ni wire as substrate, carbon film as transducers and carbonate-selective membrane layers. This paper describes the preparation process of the electrode and characterises its performance via scanning electron microscopy (SEM) and electrochemical analysis. The detection limit of the electrode for CO32− is 2.821 × 10−6 mol/L, the linear response range is 1.0 × 10−5–1.0 × 10−1 mol/L and the Nernst slope was −30.4 mV/decade. In April 2021, the carbonate ISE was mounted on multi-parameter sensors with pH and Eh (redox) electrodes for the search of hydrothermal activity at the Southwest Indian Ridge. The simultaneous potential anomalies appeared at this carbonate electrode with the pH and Eh electrodes when passing through the hydrothermal field. The study of the hydrothermal field was supported by the in situ camera video and the sulphide samples. Additionally, the carbonate electrode provides enhanced information of water chemistry for the study of the hydrothermal field.
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WANG, JIAN, RICHARD E. FARRELL und A. DUNCAN SCOTT. „COMPARISON OF ION-SELECTIVE ELECTRODE METHODS FOR DETERMINING POTASSIUM Q/I RELATIONSHIPS“. Canadian Journal of Soil Science 70, Nr. 4 (01.11.1990): 693–704. http://dx.doi.org/10.4141/cjss90-071.
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Methods of characterizing the K + status of soils in terms of quantity-intensity (Q/I) relationships usually entail lengthy equilibration periods, filtrations, and multiple analyses of the filtrates. It has been established, however, that simpler and less time-consuming methods of determining Q/I parameters can be devised with ion-selective electrodes (ISEs). To this end, different ISE methods were developed and evaluated with suspensions of three Iowa soils and a successive-additions method of varying the added K+. The ISE methods, which were categorized on the basis of the electrochemical cell involved, were tested for their applicability to soil suspensions. Specifically, single-ISE (K- and Ca-ISEs vs. a double-junction reference electrode assembly with a 10 M LiOAc salt bridge), dual-ISE (K-ISE vs. Ca-ISE), and triple-ISE (K- and Ca-ISEs vs. Cl-ISE) methods were compared to ascertain the best means of determining the ΔK (gain or loss of dissolved K) and CR [concentration ratio: CK/(CCa+Mg)1/2] terms of the Q/I relationships. The Q/I curves for the three soils and the specific parameters of Q/I relationships were also determined with the different ISE methods. It was concluded that the combined approach of using the triple-ISE method with soil suspensions offers the best means of carrying out simple, rapid, and liquid junction free determinations of potassium Q/I relationships. Key words: Electrochemical cell, liquid junction, concentration ratio, potential buffering capacity
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Bertholf, R. L., M. G. Savory, K. H. Winborne, J. C. Hundley, G. M. Plummer und J. Savory. „Lithium determined in serum with an ion-selective electrode.“ Clinical Chemistry 34, Nr. 7 (01.07.1988): 1500–1502. http://dx.doi.org/10.1093/clinchem/34.7.1500.
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Abstract We evaluated the performance of the lithium ion-selective electrode (ISE) in the Du Pont Na/K/Li analyzer. Lithium concentrations in 106 serum samples from patients being treated with lithium were measured in duplicate with the ISE and by flame photometry. The slope of the regression line for the two methods was 1.004 with a standard error of the estimate of 0.049 mmol/L (x = flame photometry, y = ISE). Lithium measurements by the ISE method in serum or aqueous standards were linear to greater than 2.0 mmol/L. Within-run CVs for low (0.31 mmol/L) and high (1.15 mmol/L) lithium controls were 5.9% and 1.7%, respectively (n = 20). Day-to-day CVs for the same controls were 9.8% and 3.3%, respectively (n = 20). There was no significant interference when the concentrations of sodium, potassium, calcium, or magnesium were varied, nor did intervening urinary lithium analyses affect the measurement of serum lithium. Results for lithium measurement in four serum-based survey materials compared well with results by isotope dilution/mass spectrometry.
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Hu, Shihui, Rong Zhang und Yunfang Jia. „Porous Graphene Oxide Decorated Ion Selective Electrode for Observing Across-Cytomembrane Ion Transport“. Sensors 20, Nr. 12 (21.06.2020): 3500. http://dx.doi.org/10.3390/s20123500.
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The technology for measuring cytomembrane ion transport is one of the necessities in modern biomedical research due to its significance in the cellular physiology, the requirements for the non-invasive and easy-to-operate devices have driven lots of efforts to explore the potential electrochemical sensors. Herein, we would like to evidence the exploitation of the porous graphene oxide (PGO) decorated ion selective electrode (ISE) as a detector to capture the signal of cytomembrane ion transport. The tumor cells (MDAMB231, A549 and HeLa) treated by iodide uptake operation, with and without the sodium-iodide-symporter (NIS) expression, are used as proofs of concept. It is found that under the same optimized experimental conditions, the changed output voltages of ISEs before and after the cells’ immobilization are in close relation with the NIS related ion’s across-membrane transportation, including I−, Na+ and Cl−. The explanation for the measured results is proposed by clarifying the function of the PGO scaffold interfacial micro-environment (IME), that is, in this spongy-like micro-space, the NIS related minor ionic fluctuations can be accumulated and amplified for ISE to probe. In conclusion, we believe the integration of the microporous graphene derivatives-based IME and ISE may pave a new way for observing the cytomembrane ionic activities.
Dissertationen zum Thema "Ion-selective electrode (ISE)"
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Berg, Josephine. „An Ion-Selective Electrode for Detection of Ammonium in Wastewater Treatment Plants“. Thesis, KTH, Kemi, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-298183.
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Att följa ammonium i reningsverk är avgörande för att förbättra reningsprocessen och kontrollera flödet av föroreningar ut till ekosystemet. Jonselektiva elektroder (ion-selective electrodes, ISEs) är en lovande teknik inom området, där polymermembran baserade på nonactin är de mest studerade membranen för ammoniumsensorer. Membranet droppas tillsammans med ett jon-till-elektron transducerande material på ett elektrodsubstrat av grafit eller glasartat kol. Nonactin-baserade jonselektiva elektroder har typiskt en detektionsgräns inom storleksordningen 10-5 M, men uppvisar betydande kaliuminterferenser. Ett elektrodsystem baserat på grafitelektroder, inkluderande en ISE och en referenselektrod (RE), studerades i detta examensarbete. De jonselektiva elektroderna producerades genom att droppa jon-till-elektron trandsducerande funktionella flerväggiga kolnanotuber (functional multiwalled carbon nanotubes, f-MWCNTs) lösta i tetrahydrofuran (THF) och en membrancocktail innehållande polyvinylklorid (PVC), mjukgörare och nonactin löst i THF på grafitelektroder. Membranet täcktes sedan med en buffrad polyvinylalkohol (PVA) hydrogel med pH 7 och ett gas-permeabelt membran. Referenselektroderna producerades genom att droppa en membrancocktail av polyvinylbutyral (PVB) mättat med NaCl på grafitelektroder. Jonselektiva elektroder med f-MWCNTs som jon-till-elektron transducerande lager och ett PVC-baserat ammonium-selektivt membran med nonactin producerades framgångsrikt. Elektroderna hade en detektionsgräns i storleksordningen 10-5 M, vilket kan jämföras med tidigare artiklar publicerade inom området. Ytterligare producerades PVB-baserade referenselektroder mättade med NaCl framgångsrikt. Referenselektroderna uppvisade små variationer när koncentrationer av olika salt varierades. Arbetet visade att det gaspermeabla membranet Hyflon AD i kombination med en PVA hydrogel inte var lämplig i den föreslagna konfigurationen, då hålrum formades i torkningsprocessen av det gaspermeabla membranet och membranet delaminerade. Det föreslogs att beteendet kunde vara en konsekvens av inkompatibilitet mellan PVC och det gaspermeable membranet, till följd av deras skillnad i polaritet.Monitoring ammonium in wastewater is vital to improve the treatment process and monitor the release of the pollutant into the ecosystem. Ion-selective electrodes (ISEs) is a promising technique in the area where the ISE is often based on a polymeric membrane containing the ionophore nonactin. The polymeric ion-selective membrane is drop-cast onto graphite or glassy carbon electrode substrates together with an ion-to-electron transducing layer. Nonactin-based ISEs typically demonstrate a limit of detection (LOD) in the range of 10-5 M, but exhibit significant potassium interferences. A solid-state system based on graphite electrodes, including an ISE and a reference electrode (RE), was investigated in this study. The ISEs were produced by drop-casting ion-to-electron transducing functional multi-walled carbon nanotubes (f-MWCNTs) dispersed in tetrahydrofuran (THF) and a membrane cocktail comprising poly(vinyl chloride) (PVC), plasticizer, and nonactin dispersed in THF onto graphite electrodes. The membrane was then covered with a buffered poly(vinyl alcohol) (PVA) hydrogel of pH 7 and a gas-permeable membrane (GPM). The solid-state RE was produced by drop-casting a poly(vinyl butyral) (PVB) membrane cocktail saturated with NaCl onto the graphite electrode. ISEs using f-MWCNTs as ion-to-electron transducers and a PVC-based ammonium-sensitive membrane with nonactin were successfully produced. The electrodes exhibited LODs in the range of 10-5 M, which is comparable to previous articles published on the subject. Additionally, PVB-based solid-state REs saturated with NaCl were successfully produced. The reference electrodes exhibited minor influences when varying the concentrations of various salts. The study showed that the GPM Hyflon AD combined with a PVA hydrogel was not suitable in this configuration, as air voids were formed in the drying process, and the membrane was easily delaminated. It was suggested that this behavior could be a consequence of the incompatibility of PVC and the GPM due to their difference in polarity.
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Kronborg, Anne Ingelill Engvik. „Trace Elements in Norwegian and Polish Tea Infusions : Determined by High-Resolution Inductively Coupled Plasma Mass Spectrometry (HR ICP-MS) and Ion Selective Electrode (ISE)“. Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for kjemi, 2013. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-21166.
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AbstractTea from the plant Camellia sinensis is the world’s most popular non-alcoholic beverage, next to water. Tea can be divided into six types, and the most popular teas are black tea, green tea and oolong. In this study infusions of 85 Norwegian and Polish tea samples were analysed to investigate the content of trace elements. 40 samples from Norwegian supermarkets, 30 from the local tea and coffee shop and 15 Polish samples were infused for 5 minutes with ultrapure boiling water (1 gram tea/100 mL). The fluoride content in the tea infusions was determined using an ion selective electrode (ISE), and the rest of the elements were determined by high-resolution inductively coupled plasma mass spectrometry (HR ICP-MS). Tea is a rich source of essential elements as calcium (Ca), phosphorus (P), potassium (K), magnesium (Mg), manganese (Mn), iron (Fe), copper (Cu) and zinc (Zn). The infusions also contain non essential elements as nickel (Ni),lead (Pb), fluoride (F) and aluminium (Al). The average concentrations in one cup of tea from the Norwegian market contains among other elements average concentrations of 0.6 mg Ca/L, 2.8 mg P/L, 37.1 mg K/L, 2.0 mg Mg/L, 5.9 µg Fe/L, 14.1 µg Cu/L, 26.4 µg Zn/L, 0.6 mg Mn/L, 9.9 µg Ni/L, 0.16 µg Pb/L, 0.5 µg Cr/L, 1.0 mg F/L and 1.1 mg Al/L. For the essential elements Ca, P, K, Mg, Fe, Cu and Zn the tea infusions will not contribute to attain the recommended dietary allowances (RDAs) in any extent, but for Mn where the AI are 2.3 mg/day (men) and 1.8 mg/day (women) a few cups of tea can exceed the given AI level. The amount of Pb in the infusions is sustainable lower than the provisional tolerable weekly intake (PTWI) of 25 µg/kg body weight. Drinking tea will therefore not contribute in any high extent to the PTWI.There were on the other hand obtained vast variations of F concentrations in different types of tea and tea contributes also in huge extent to AI of F - 3 mg/day (women), 4 mg/day (men) and from 0.5- 1 mg/day (0 -12 year olds). One cup of tea could easily exceed the AI, at least considering children drinking tea. The Al content in tea is high, and for heavy tea drinkers may tea be the largest single source of Al to contribute to the total weekly intake (TWI) of 1 mg/ kg body weight/ week.The study showed higher concentrations of elements in tea infusions made of tea bags than infusions made of loose tea. Suggesting that the elements in the crushed leaves in tea bags are more extractable than in the loose tea leaves. One other explanation is that the tea bags contain older tea leaves with lower quality and therefore older leaves with higher concentrations of e.g. Al. There was also seen a significant difference in the element composition in Norwegian and Polish infusion, with higher concentrations of elements in the Norwegian infusions.
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Lin, Kao Ning, und 林國甯. „Direct Ion-Selective Electrode （ISE） Determination of Sodium, Potassium and Chloride in Serum Samples Compared withvIndirect Ion-Selective Electrode Determination“. Thesis, 2005. http://ndltd.ncl.edu.tw/handle/69109622228212445721.
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碩士臺北醫學大學
醫學技術學系
93
There are substances common as well as electrolyte can not detect by colorimetry method. Determination of Sodium, Potassium and Chloride can process by Flame Photometry、Atomic absorption spectrophotometry and Ion-Selective Electrode. Ion selective electrode is one kind of electrochemical half-reaction cell, its electrode potential varies with the ion concentration in the testing solution. It is used to measure the concentration of one specific ion in the solution. The electrolyte analyzer has been used as a practical ion concentration detect sensor because of its simplicity of device constructing, simple operation, high accuracy and precision. The ion selective electrodes are used in the clinical chemistry electrolyte analyzer to test the concentrations of sodium and potassium ion in the serum sample in Taiwan commonly. There are many hospitals applied Indirect Ion-Selective Electrode（Indirect ISE）clinical chemistry analyzer. Are there significant differences between Indirect ISE and Direct Ion-Selective Electrode（Direct ISE）？ Are the Direct ISE more accuracy routine clinical chemistry analysis method？ Are there some methods to eliminate the common interferences as well as lipid in routine serum sample？ We investigate the determination of sodium and potassium ion and focus on differences between Indirect ISE and Direct ISE in this thesis. We collect two hundred and thirty-three serum samples. Each sample splits into two aliquots. One aliquot process Indirect ISE electrolyte analysis and the other test by Direct ISE in Roche Integra and Hitachi clinical chemistry instrument. We get some results from this study： 1.There are significant differences between Indirect ISE and Direct ISE to analyze electrolyte. If the electrolytes are measured by Indirect ISE analyzer, there is a predictable decrease data results. 2.HDL-C and LDL-C two valuables have no significant correlations with differences between Indirect ISE and Direct ISE electrolyte analyzer. TG and T-cho two valuables have significant correlations with differences between Indirect ISE and Direct ISE electrolyte analyzer. 3.We apply organic reagent（Ethyl Acetate） to eliminate serum lipid and correct bias which from Indirect ISE analysis. 4.We apply ultracentrifuge method to eliminate serum lipid and correcte bias from Indirect ISE analyzer. The results of this research shows the valuable mode in practical clinical chemistry field. Because this research is only small scope initial study about ISE, samples are minor and only apply one kind of clinical chemistry analyzer. We can not get a better precise score. As a consequence and extinguish predicting model is set up for clinical chemistry analysis field increasing personal health and clinical diagnosis abilities.
Bücher zum Thema "Ion-selective electrode (ISE)"
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Dixon, Lois Anna. The measurement and validity of ion-selectivity [i.e., selective] electrode selectivity coefficients under non-Nernstian conditions. 1986.
Den vollen Inhalt der Quelle findenBuchteile zum Thema "Ion-selective electrode (ISE)"
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„ISE (Ion-Selective Electrode)“. In Encyclopedia of Biophysics, 1156. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-16712-6_100503.
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SENDA, MITSUGI, TAKASHI KAKIUCHI, TOSHIHARU NUNO, TOSHIYUKI OSAKAI und TADAAKI KAKUTANI. „THEORY OF ION-SELECTIVE ELECTRODES, AMPEROMETRIC ISE AND POTENTIOMETRIC ISE“. In Ion-Selective Electrodes, 559–68. Elsevier, 1989. http://dx.doi.org/10.1016/b978-0-08-037933-3.50040-5.
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CAMMANN, K., und S. L. XIE. „ISE SELECTIVITY AND ION-EXCHANGE KINETICS“. In Ion-Selective Electrodes, 43–64. Elsevier, 1989. http://dx.doi.org/10.1016/b978-0-08-037933-3.50008-9.
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„Ion-selective Electrodes (ISE)“. In Analysis and Analyzers, 458–73. Taylor & Francis Group, 6000 Broken Sound Parkway NW, Suite 300, Boca Raton, FL 33487-2742: CRC Press, 2016. http://dx.doi.org/10.1201/9781315370323-34.
Der volle Inhalt der QuelleKonferenzberichte zum Thema "Ion-selective electrode (ISE)"
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David Hernandez-Varela, Josue, Francisco J. Bejarano Santiago, Jose Jorge Chanona-Perez und Juan Vicente Mendez Mendez. „Development and Characterization of a Recycled Plastic Based Ion-Selective Electrode (PB-ISE) Using CNT Ink as Ion-To-Electron Transducer“. In 2019 16th International Conference on Electrical Engineering, Computing Science and Automatic Control (CCE). IEEE, 2019. http://dx.doi.org/10.1109/iceee.2019.8884486.
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Stelzle, M., C. Bieg, K. Fuchsberger, G. Linke, R. Samba und S. Werner. „A3.3 - Solid contact ion selective electrodes (ISE) for applications in life sciences, biotechnology and environmental monitoring – Technology and Performance“. In AMA Conferences 2017. AMA Service GmbH, Von-Münchhausen-Str. 49, 31515 Wunstorf, Germany, 2017. http://dx.doi.org/10.5162/sensor2017/a3.3.
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Nottoli, Emmanuelle, Philippe Bienvenu, Didier Bourlès, Alexandre Labet, Maurice Arnold und Maité Bertaux. „Determination of Long-Lived Radionuclide (10Be, 41Ca, 129I) Concentrations in Nuclear Waste by Accelerator Mass Spectrometry“. In ASME 2013 15th International Conference on Environmental Remediation and Radioactive Waste Management. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/icem2013-96054.
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Radiological characterization of nuclear waste is essential for storage sites management. However, most of Long-Lived RadioNuclides (LLRN), important for long-term management, are difficult to measure since concentration levels are very low and waste matrices generally complex. In an industrial approach, LLRN concentrations are not directly measured in waste samples but assessed from scaling factors with respect to easily measured gamma emitters. Ideally, the key nuclide chosen (60Co, 137Cs) should be produced by a similar mechanism (fission or activation) as the LLRN of interest and should have similar physicochemical properties. However, the uncertainty on the scaling factors, determined from experimental and/or calculation data, can be quite important. Consequently, studies are performed to develop analytical procedures which would lead to determine precisely the concentration of LLRN in nuclear waste. In this context, the aim of this study was to determine the concentrations of three LLRN: 129I (T1/2 = 15.7×106 a), 41Ca (T1/2 = 9.94×104 a) and 10Be (T1/2 = 1.387×106 a) in spent resins used for primary fluid purification in Pressurized Water Reactors using Accelerator Mass Spectrometry (AMS) for measurement. The AMS technique combined mass spectrometry and nuclear physics to achieve highly efficient molecular and elemental isobars separation. Energies of several Million Electron-Volt transferred to the ions in the first accelerating part of specifically developed tandem accelerators lead to molecular isobars destruction through interaction with the argon gas used to strip the injected negative ions to positive ones. At the exit of the tandem accelerator, the energy acquired in both accelerating parts allows an elemental isobars separation based on their significantly different energy loss (dE) while passing through a thickness of matter dx that is proportional to their atomic number (Z) and inversely proportional to ions velocity (ν) according to the Bethe-Block law (1). (1)dEdx=k*Z2ν2 The use of a particle accelerator in conjunction with a selective ion source, mass and energy filters and a high-performance detector thus allow unambiguously identifying and measuring analyte concentration against much more abundant interfering isobars. The development of AMS and of related applications have recently been extensively reviewed [1–3]. Up to now, the potentialities of the accelerator mass spectrometry technique were explored for the measurement of cosmogenic radionuclides produced in the Earth’s environment either in the atmosphere or in the Earth’s crust (in situ-production). Many applications aiming to date and/or quantify Earth surface processes have been developed in the fields of geology, geomorphology and planetary sciences as well as archeology paleoanthropology and biomedicine. The present study extends the scope of AMS to nuclear industry. Because AMS facilities are not widely accessible and difficult to handle, LLRN concentrations in nuclear waste are usually determined using Inductively Coupled Plasma Mass Spectrometry (ICP-MS) and radiometric techniques. However for the measurement of very low LLRN concentrations, AMS becomes the most effective measurement method with detection limits of 105–106 atoms per sample. In this study, AMS measurements were performed using the French AMS national facility ASTER located at the Centre Européen de Recherche et d’Enseignement des Géosciences de l’Environnement (CEREGE). The challenge was to define a chemical treatment procedure allowing the measurement of the three nuclides, 10Be, 41Ca and 129I, by AMS. Each method selection was based on three main requirements: 1) a quantitative recovery in solution of Be, Ca, I and key radionuclides after resin mineralization, 2) a selective extraction from the sample matrix and the separation from β-γ emitters (3H, 14C, 55Fe, 59Ni, 60Co, 63Ni, 90Sr, 125Sb, 134Cs, 137Cs) and isobars, 3) the precipitation of each element under the best suited forms (i.e. AgI, CaF2, BeO) for AMS measurements. The chosen methods were optimized on synthetic solutions and finally applied for the determination of the three LLRN concentrations in spent resins from a 900 MWe Nuclear Power Reactor.