Use of a polymer modified electrode for arsenic determination

María Del Valle, Fabiola Bustos, Fernando R. Díaz, Gean C. Arteaga, Loreto A. Hernández and Andrea C. Ramos

International Journal of Sciences, 2013, vol. 2, issue 01, 27-39

Abstract: This paper presents the optimization of a polypyrrole-modified steel electrode (SS/PPy) to be used as arsenic(V) amperometric sensor using electrochemical techniques. The electrode response is based on the doping/undoping ability of the polymer matrix that involves anions incorporation and removal, generating thus a charge or current that correlates to the analyte concentration.Once the electrode was optimized, analytical parameters were established. A linear response in the range 5 - 250 ppm As(V) was found, with a response time 5 s. Besides, it is noteworthy that the response obtained with a freshly prepared SS/Ppy electrode before each measurement is highly reproducible. Therefore the SS/Ppy electrode is proposed as a sensor that may be utilized as disposable device.

Keywords: polypyrrole electrode; arsenic; arsenic quantitation; amperometric sensor; arsenic sensor. (search for similar items in EconPapers)
Date: 2013
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