Electrochemical determination of L-cysteine using polyaniline/CuGeO3 nanowire modified electrode

Abstract

The 10 wt % polyaniline/CuGeO3 nanowire modified glassy carbon electrode has been used for the electrochemical determination of L-cysteine. The electrochemical behavior of L-cysteine at the 10 wt % polyaniline/CuGeO3 nanowire modified glassy carbon electrode has been investigated. The intensities of the anodic cyclic voltammogram (CV) peaks of L-cysteine at the modified electrode increase linearly with the increase of the L-cysteine content in the range of 0.001–2 mM and scan rate ranging from 25 to 200 mV s−1. 10 wt % polyaniline/CuGeO3 nanowire modified glassy carbon electrode exhibits good reproducibility, stability and low detection limit of 1.7 and 0.44 μM for cvpl and cvp2, respectively. The polyaniline combined with the CuGeO3 nanowires can improve the electrochemical detection ability of L-cysteine.