碳纳米管修饰电极上辣椒粉中痕量苏丹红I污染物的电化学测定

Ming Liang, Xi Xia, Chen Tingting, Liu Jie

The School of Chemistry and Chemical Technology, Nantong University, Nantong, Jiangsu 226001, P.R. China.

Jiangsu Key Laboratory of Neuroregeneration, Nantong University, Nantong, Jiangsu 226001, P.R. China.

Sensors (Basel). 2008 Mar 17;8(3):1890-1900. doi: 10.3390/s8031890.

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 to 7.5×10 M, r = 0.9967), detection limit (2.0×10 M) and reproducibility (RSD = 4.6%, n=10, for 2.0×10 M Sudan I).

我们基于苏丹红I在碳纳米管修饰电极上的催化电化学还原，开发了一种简单、便捷且廉价的伏安法，用于测定辣椒粉中痕量苏丹红I的污染情况。在优化条件下，该方法在线性度（浓度范围为6.0×10至7.5×10 M，r = 0.9967）、检测限（2.0×10 M）和重现性（对于2.0×10 M苏丹红I，RSD = 4.6%，n = 10）方面表现出可接受的分析性能。