Journal of Chemical Sciences

, Volume 120, Issue 5, pp 493–498

A study of nanostructured gold modified glassy carbon electrode for the determination of trace Cr(VI)

Article

DOI: 10.1007/s12039-008-0077-1

Cite this article as:
Liu, B., Lu, L., Wang, M. et al. J Chem Sci (2008) 120: 493. doi:10.1007/s12039-008-0077-1

Abstract

A nanostructured gold modified glassy carbon electrode (Aunano/GCE) was employed for the determination of trace chromium(VI). To prepare Aunano/GCE, the GCE was immersed into KAuCl4 solution and electrodeposition was conducted at the potential of −0·4 V (vs Ag/AgCl) for 600 s. Scanning electron microscopy measurements show that the electrochemically synthesized gold nanoparticles were deposited in aggregated form. Any undue effects caused by the presence of foreign ions in the solution were also analysed to ensure that common interference in the determination of chromium(VI) by square wave voltammetry, do not influence the electrochemical response of the latter element. The results show that this method allows for Cr(VI) determinations with a much lower detection limit (0·01 µg L−1) in the presence of excess of Cr(III) than the commonly used diethylenetriammine pentaacetic acid (DTPA) method. The method was applied to determine levels of chromium(VI) in tap water and sewage water.

Keywords

Nanostructured gold modified glassy carbon electrode square wave voltammetry Cr(VI) 

Copyright information

© Indian Academy of Sciences 2008

Authors and Affiliations

  1. 1.Department of ChemistryHuaibei Coal Normal CollegeHuaibeiChina

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