Electrocatalytic oxidation of hydrazine at the poly(glutamic acid) chemically modified electrode and its amperometric determination

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Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.3/150058

Title: Electrocatalytic oxidation of hydrazine at the poly(glutamic acid) chemically modified electrode and its amperometric determination
Author(s): Yu, Ai-Min; Chen, Hong-Yuan
Abstract: The electrochemical polymerization of glutamic acid at the glassy carbon electrode was investigated in phosphate buffer solution by cyclic voltammetry. The applied voltage range, pH of electrolyte, cyclic number were explored for optimal polymerization conditions. The resulting film exhibits an electrocatalytic ability to hydrazine, reducing the overpotential by 500mV. The electrocatalytic response of hydrazine is evaluated with regard to pH, scan rate, applied voltage, hydrazine concentration and other variables. The rate constant of the catalytic reaction was 1.2 x 10^4 M^-1.s^-1. When used as amperometric detector, the modified electrode yields a detection limit of 1 x 10^-8 M hydrazine. The electrode is rather stable even after use for a month and a reproducible response was obtained.
Publication type: Journal article
Source: Analytical Letters, Vol. 30, no. 3 (Feb 1997), pp. 599-607
Publication year: 1997
FOR Code(s): 0301 Analytical Chemistry
Keyword(s): Amperometric detection; Electrocatalytic oxidation; Hydrazine; Poly(glutamic acid)CME
Publisher: Marcel Dekker (now an imprint of Taylor & Francis)
ISSN: 0003-2719
Publisher URL: http://dx.doi.org/10.1080/00032719708001804
Peer reviewed