title: Electrochemical Determination of Trace Sudan I Contamination in Chili Powder at Carbon Nanotube Modified Electrodes.
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 6.0×10-7to 7.5×10-5M, r = 0.9967), detection limit (2.0×10-7M) and reproducibility (RSD = 4.6%, n=10, for 2.0×10-5M Sudan I).
authors.affiliation: The School of Chemistry and Chemical Technology, Nantong University, Nantong, Jiangsu 226001, P.R. China. ml@ntu.edu.cn.
authors.forename: Liang
authors.initials: L
authors.lastname: Ming
authors.affiliation: The School of Chemistry and Chemical Technology, Nantong University, Nantong, Jiangsu 226001, P.R. China. xixia@ntu.edu.cn.
authors.forename: Xia
authors.initials: X
authors.lastname: Xi
authors.affiliation: The School of Chemistry and Chemical Technology, Nantong University, Nantong, Jiangsu 226001, P.R. China. ctt_1980@163.com.
authors.forename: Tingting
authors.initials: T
authors.lastname: Chen
authors.affiliation: Jiangsu Key Laboratory of Neuroregeneration, Nantong University, Nantong, Jiangsu 226001, P.R. China. jliu@ntu.edu.cn.
authors.forename: Jie
authors.initials: J
authors.lastname: Liu
keywords: Chili powder; Modified electrodes; Multi-wall carbon nanotubes; Sudan I; Voltammetric determination