铋膜电极测定辣椒制品中苏丹红Ⅱ的研究  

Determination of sudan II in chile with bisthmuth film electrode

作　　者：魏敏[1] 杜美菊[1] 吴家锴[1] 

机构地区：[1]商丘师范学院化学系,河南商丘476000

出　　处：《应用化工》2007年第8期830-832,共3页Applied Chemical Industry

摘　　要：用循环伏安法（CV）、线性扫描伏安法（LSV）研究了苏丹红Ⅱ在铋膜电极上的电化学行为。结果表明,在最佳条件下,BR缓冲溶液（pH=2）,无水乙醇作助溶剂（体积分数27.5%）,苏丹红Ⅱ在-0.50附近有一灵敏还原吸收峰。用线性扫描伏安法测定标准品,扫描速度为100 mV/s,浓度在7.49×10^-6-1.87×10^-5范围内和峰高呈线性关系。回归线方程：íp=1.722 2＋0.751 7c（×10^-3mmol/L）,r=0.994 8。检出限为3.74×10^-4mmol/L。据此建立了一种快速、简便测定苏丹红Ⅱ的方法。The electrochemical of sudan Ⅱ at a bisthmuth film electrode by cyclic voltammetry and linear sweep voltammetry has been studied. In the buffer solution of BR （ pH = 2.0） and ethanol （ Cv = 27.5% ） ,sudan Ⅱ produced a reductive peak at -0.5 V,peak current showed a well linear relationship with concentration of sudan l[ in the range of 7.49 ×10^-6-1.87×10^-5mol/L,and regression equation ip =1.722 2＋0.751 7c（×10^-3mmol/L）. The limit detection is 3.74× 10^-4 mmol/L,with the correlation coefficient of 0.994 8. This method can be applied to determine sudan Ⅱ.

关 键 词：苏丹红Ⅱ 铋膜电极 循环伏安法 线性扫描伏安法 

分 类 号：O657[理学—分析化学]