Abstract
In this study, the electroanalytical application of Tosflex, a perfluoro-anion-exchange membrane which has not been studied as much as Nafion and poly(4-vinylpyridine), is demonstrated using diethyldithiophosphoric acid (DEDTP) as an example. DEDTP dimerizes upon electrochemical oxidation at a glassy carbon electrode (GCE), but the current corresponding to this oxidation is rather small for analytical purpose. A Tosflex polymer film modified glassy carbon electrode (TFGCE) was fabricated to improve the detection of DEDTP. In a pH 5.5 solution, DEDTP deprotonated to DEDTP- anion which was accumulated onto TFGCE by the anion-exchange feature of Tosflex followed by square-wave voltammetric determination. With 3 min accumulation, the analytical signal versus concentration dependence was linear from 2 ppb (1.07 × 10-8 M) to 400 ppb (2.16 × 10-6 M) with a regression coefficient of 0.995 and a detection limit of 0.4 ppb (2.1 × 10-9 M). Unlike many other anion-exchange polymer modified electrodes, the TFGCE showed excellent stability over the studied pH range of 1-9.
| Original language | English |
|---|---|
| Pages (from-to) | 767-772 |
| Number of pages | 6 |
| Journal | Electroanalysis |
| Volume | 14 |
| Issue number | 11 |
| DOIs | |
| Publication status | Published - 2002 Jul 16 |
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All Science Journal Classification (ASJC) codes
- Analytical Chemistry
- Electrochemistry
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Electrochemical detection of O,O-Diethyldithiophosphoric acid at a Tosflex film modified glassy carbon electrode. / Cheng, Huei Lin; Kuei, Chun Hsiung; Sun, I-Wen.
In: Electroanalysis, Vol. 14, No. 11, 16.07.2002, p. 767-772.Research output: Contribution to journal › Review article
TY - JOUR
T1 - Electrochemical detection of O,O-Diethyldithiophosphoric acid at a Tosflex film modified glassy carbon electrode
AU - Cheng, Huei Lin
AU - Kuei, Chun Hsiung
AU - Sun, I-Wen
PY - 2002/7/16
Y1 - 2002/7/16
N2 - In this study, the electroanalytical application of Tosflex, a perfluoro-anion-exchange membrane which has not been studied as much as Nafion and poly(4-vinylpyridine), is demonstrated using diethyldithiophosphoric acid (DEDTP) as an example. DEDTP dimerizes upon electrochemical oxidation at a glassy carbon electrode (GCE), but the current corresponding to this oxidation is rather small for analytical purpose. A Tosflex polymer film modified glassy carbon electrode (TFGCE) was fabricated to improve the detection of DEDTP. In a pH 5.5 solution, DEDTP deprotonated to DEDTP- anion which was accumulated onto TFGCE by the anion-exchange feature of Tosflex followed by square-wave voltammetric determination. With 3 min accumulation, the analytical signal versus concentration dependence was linear from 2 ppb (1.07 × 10-8 M) to 400 ppb (2.16 × 10-6 M) with a regression coefficient of 0.995 and a detection limit of 0.4 ppb (2.1 × 10-9 M). Unlike many other anion-exchange polymer modified electrodes, the TFGCE showed excellent stability over the studied pH range of 1-9.
AB - In this study, the electroanalytical application of Tosflex, a perfluoro-anion-exchange membrane which has not been studied as much as Nafion and poly(4-vinylpyridine), is demonstrated using diethyldithiophosphoric acid (DEDTP) as an example. DEDTP dimerizes upon electrochemical oxidation at a glassy carbon electrode (GCE), but the current corresponding to this oxidation is rather small for analytical purpose. A Tosflex polymer film modified glassy carbon electrode (TFGCE) was fabricated to improve the detection of DEDTP. In a pH 5.5 solution, DEDTP deprotonated to DEDTP- anion which was accumulated onto TFGCE by the anion-exchange feature of Tosflex followed by square-wave voltammetric determination. With 3 min accumulation, the analytical signal versus concentration dependence was linear from 2 ppb (1.07 × 10-8 M) to 400 ppb (2.16 × 10-6 M) with a regression coefficient of 0.995 and a detection limit of 0.4 ppb (2.1 × 10-9 M). Unlike many other anion-exchange polymer modified electrodes, the TFGCE showed excellent stability over the studied pH range of 1-9.
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U2 - 10.1002/1521-4109(200206)14:11<767::AID-ELAN767>3.0.CO;2-Z
DO - 10.1002/1521-4109(200206)14:11<767::AID-ELAN767>3.0.CO;2-Z
M3 - Review article
VL - 14
SP - 767
EP - 772
JO - Electroanalysis
JF - Electroanalysis
SN - 1040-0397
IS - 11
ER -