Application of Double Matrix Membrane Technology for Ion-Selective Electrodes

Double matrix membrane technology (DMM) is an excellent technique for creating inexpensive and robust electrochemical electrodes. In this report the use of DMM-electrodes to measure different ions (namely Ca 2+ , Mg 2+ , Cl − ) is described. The ion-selective membranes are basing on PVC and stabiliz...

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Vydáno v:Analytical letters Ročník 36; číslo 1; s. 21 - 39
Hlavní autoři: Wendzinski, Frank, Borchardt, Michael, Romberg, Bettina, Knoll, Meinhard
Médium: Journal Article
Jazyk:angličtina
Vydáno: Philadelphia, PA Taylor & Francis Group 03.01.2003
Taylor & Francis
Témata:
Analytical chemistry
Calcium-selective
Chemistry
Chloride-selective
DMM
Electrode
Exact sciences and technology
General, instrumentation
Magnesium-selective
PVC-membrane
Performance evaluation
Polymeric membrane
Membrane electrode
Electrode
Calcium-selective
Porous membrane
PVC-membranes DMM
Magnesium-selective
Chemical sensor
Alkaline earth metal Ions
Electrochemical detector
Ion selective electrode
Chloride-selective
Calcium ion
Ionic selectivity
Magnesium ion
ISSN:0003-2719, 1532-236X
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Popis
Shrnutí:Double matrix membrane technology (DMM) is an excellent technique for creating inexpensive and robust electrochemical electrodes. In this report the use of DMM-electrodes to measure different ions (namely Ca 2+ , Mg 2+ , Cl − ) is described. The ion-selective membranes are basing on PVC and stabilized by deposition on a porous matrix. The authors determined the following characteristics of the ion-selective electrodes (ISEs): sensitivity; detection limit; linear range and selectivity coefficients. When changing the analyte concentration response time was lower than 30 s (Ca 2+ , Cl − ) or 1 min (Mg 2+ ). In the case of the determination of the selectivity coefficients it was considered in which concentrations the interfering ions naturally occur in physiological matrices, e.g., blood. In case of the chloride-selective electrode the discrimination of ascorbic acid and salicylate was investigated. The coefficients were evaluated by using the fixed interference method (FIM). The reproducibility of electrochemical characteristic was determined by investigating 120 mass-produced ammonium-selective electrodes. Furthermore, it was discovered that DMM-based potassium-selective electrodes may be stored stable for at least 4.5 years.
ISSN:0003-2719
1532-236X
DOI:10.1081/AL-120017261