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Sensors 2008, 8(3), 1890-1900; doi:10.3390/s8031890

Electrochemical Determination of Trace Sudan I Contamination in Chili Powder at Carbon Nanotube Modified Electrodes

1
The School of Chemistry and Chemical Technology, Nantong University, Nantong, Jiangsu 226001, P.R. China
2
Jiangsu Key Laboratory of Neuroregeneration, Nantong University, Nantong, Jiangsu 226001, P.R. China
*
Author to whom correspondence should be addressed.
Received: 23 January 2008 / Accepted: 20 February 2008 / Published: 17 March 2008
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Abstract

We have developed a simple, convenient and inexpensive voltammetric method for determining trace Sudan I contamination in chili powder, based on the catalyzed electrochemical reduction of Sudan I at the carbon nanotube modified electrode. Under optimized conditions, the method exhibited acceptable analytical performance in terms of linearity (over the concentration range 6.0×10–7 to 7.5×10–5 M, r = 0.9967), detection limit (2.0×10–7 M) and reproducibility (RSD = 4.6%, n=10, for 2.0×10–5 M Sudan I).
Keywords: Sudan I; Chili powder; Multi-wall carbon nanotubes; Modified electrodes; Voltammetric determination Sudan I; Chili powder; Multi-wall carbon nanotubes; Modified electrodes; Voltammetric determination
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Ming, L.; Xi, X.; Chen, T.; Liu, J. Electrochemical Determination of Trace Sudan I Contamination in Chili Powder at Carbon Nanotube Modified Electrodes. Sensors 2008, 8, 1890-1900.

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