✦ LIBER ✦

Polyaniline chemically modified electrode for detection of anions in flow-injection analysis and ion chromatography

✍ Scribed by Erkang Wang; Anhua Liu

Publisher: Elsevier Science
Year: 1991
Tongue: English
Weight: 548 KB
Volume: 252
Category: Article
ISSN: 0003-2670
DOI: 10.1016/0003-2670(91)87196-e

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✦ Synopsis

An electrochemical detector based on a polyaniline conducting polymer chemically modified electrode (PAn CME) was developed for use in bow-injection analysis and ion chromato~aphy. Iodide, bromide, thiocyanate and G&Jsulphate are detected by using ion chromatography with a PAn CME electrochemical detector. The detection limits are I, 5, 10 and 10 mgl-', respectively. The CME response for electroinactive anions varies selectively with the mobile phase composition in flow-injection analysis. By this approach, perchlorate, sulphate, nitrate, iodide, acetate and oxalate can be detected conveniently and reproducibly over a linear concentration range of at least 3 orders of magnitude. The electrode is stable for over 2 weeks with no evidence of chemical or mechanical deterioration.

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