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Position: Home > Articles > Voltammetric Behavior and Determination of Sudan I at Nano-WO3 Modified Carbon Paste Electrode FOOD SCIENCE 2012,33 (14) 125-128

苏丹红I在纳米WO3修饰电极上的伏安行为及测定

作  者:
瞿万云;胡卫兵;朱杰
单  位:
湖北民族学院化学与环境工程学院
关键词:
苏丹红染料;纳米WO3;电化学测定;食品分析;Sudan dyes; nano-W03; electrochemistry detection; food analysis
摘  要:
优化各实验参数,建立一种测定苏丹红I含量的简捷、灵敏的电分析方法。用水热法制备纳米WO,,并用其修饰碳糊电极。利用循环伏安法、线性扫描伏安法和差分脉冲伏安法研究苏丹红I在此修饰电极上的伏安行为,发现纳米W03修饰电极能显著提高苏丹红I的氧化峰电流。该方法的线性范围为1.5×10^-7~2.0×10^-5mol/L,开路富集2min后柃出限为8.0×10^-8mol/L。该方法用于辣椒制品及番茄酱等食品中苏丹红I的测定,加标回收率在91.1%~102%之间,结果令人满意。
译  名:
Voltammetric Behavior and Determination of Sudan I at Nano-WO3 Modified Carbon Paste Electrode
摘  要:
A convenient and sensitive electrochemical method was developed for the determination of Sudan I. Various experimental parameters were optimized. Nano-WO3 was synthesized by a hydrothermal method and used to modify carbon paste electrode (CPE). The voltammetric behavior of Sudan I (1-phenylzo-2-naphthalenol) was investigated by cyclic voltammetry (CV), linear sweep voltammetry (LSV) and differential pulse voltammetry (DPV). The oxidation peak current of Sudan I remarkably increased at the nano-WO3 modified electrode and linearly proportional to the concentration of Sudan I from 1.5×10^-7 to 2.0 ×10^-5 mol]L. The detection limit was 8.0×10^-8 mol/L after 2 min accumulation. The recovery rate of this method for Sudan I was in the range of 9 l. 1% -- 102%. This method is suitable for the detection of Sudan I in hot pepper products and tomato ketchup. 引用
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