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Analytical Letters Volume 46, 2013 - Issue 6
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ELECTROCHEMISTRY

Determination of Sudan I Using Electrochemically Reduced Graphene Oxide

Lei Zhang National Hepatobiliary and Enteric Surgery Research Center, Central South University, Changsha Hunan, P. R. China
,
Xiaohong Zhang National Hepatobiliary and Enteric Surgery Research Center, Central South University, Changsha Hunan, P. R. China
,
Xiaoli Li National Hepatobiliary and Enteric Surgery Research Center, Central South University, Changsha Hunan, P. R. China
,
Ying Peng National Hepatobiliary and Enteric Surgery Research Center, Central South University, Changsha Hunan, P. R. China
,
Haiju Shen National Hepatobiliary and Enteric Surgery Research Center, Central South University, Changsha Hunan, P. R. China
&
Yangde Zhang National Hepatobiliary and Enteric Surgery Research Center, Central South University, Changsha Hunan, P. R. ChinaCorrespondence[email protected]
Pages 923-935 | Received 10 Sep 2012, Accepted 31 Oct 2012, Published online: 20 Mar 2013
 
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Abstract

Electrochemically reduced graphene oxide (ER-GO) was prepared by reducing exfoliated graphene oxide sheets on a glassy carbon electrode (GCE). The voltammetric responses of Sudan I-IV were studied at the ER-GO modified GCE (ER-GO/GCE). Compared with chemically reduced graphene oxide (CR-GO) modified electrode (CR-GO/GCE), ER-GO/GCE showed higher voltammetric responses to Sudan I. The electrode had a linear response to Sudan I in the range of 0.04–8.0 µmol L−1 and a detection limit of 0.01 µmol L−1. The real sample determination indicated that the proposed method was reliable, effective, and sufficient.

Notes

a Linear scan voltammetry.

b Square wave voltammetry.

c Differential pulse voltammetry.

a Added into 10 mL blank solution.

b Not detected.

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