Potentiostatic Activation of the Carbon Fiber Electrode and Its Application to the Determination of Metal Ions

Abstract

Abstract: Carbon fiber electrodes subjected to potentiostatic pretreatment exhibit electrochemical activity. The activated electrodes can be used for determining metal ions directly without mercury film. The pretreated carbon fiber electrode shows a high sensitivity and good reproducibility in stripping voltammetry. The detection limits for Cd, Pb and Bi are 0. 5, 0. 2 and 0. 8 ng/mLrespectively. The activation conditions are optimized and activation mechanism is explored by means of cyclic voltammetry, scanning electron microscopy and X-ray photoelectron spectroscopy.

Key words: Carbon fiber microelectrode, Potentiostatic activation, Stripping voltammetry

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Peng Tu-zhi, Yang Zhong-ping, Lu Rong-shan . Potentiostatic Activation of the Carbon Fiber Electrode and Its Application to the Determination of Metal Ions[J]. Chem. J. Chinese Universities, 1991, 12(9): 1178.

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Potentiostatic Activation of the Carbon Fiber Electrode and Its Application to the Determination of Metal Ions

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