负载纳米金的聚3-甲基噻吩修饰电极测定亚硫酸根  

Determination of sulfite using Nano-Au and poly-3-methylthiophene modified electrodes

作　　者：郝玉翠[1] 

机构地区：[1]唐山学院环境与化学工程系,唐山063000

出　　处：《分析试验室》2015年第7期798-802,共5页Chinese Journal of Analysis Laboratory

基　　金：河北省高等学校科学技术研究项目(z2014016);唐山市科技局项目(13130248z);唐山市微纳米材料制备及应用重点实验室资助

摘　　要：采用电化学聚合和恒电位沉积方法制备了负载纳米金的聚3-甲基噻吩（P3MT）修饰玻碳电极（Nano-Au/P3MT/GCE）。采用循环伏安法（CV）研究了SO2-3在Nano-Au/P3MT/GCE上的电化学行为,并优化了实验参数,以此为基础建立了用差分脉冲伏安法（DPV）测定SO2-3的新方法。SO2-3的氧化峰电流和SO2-3的浓度在5.0×10^-6-8.0×10^-3mol/L范围内呈较好的线性关系（r=0.9989）,检测限1.0×10^-6mol/L（S/N=3）,红酒中SO2-3的加标回收率在97%-103%之间。Nano-gold and poly-3-methyhhiophene modified glassy carbon electrodes （Nano-Au/P3MT/GCE） were prepared by electro polymerization and potentiostatic electrochemical deposition. The electrochemical behaviors of sulfite on Nano-Au/P3MT/GCE were studied by cyclic vohammetry （CV）. The experimental parameters were optimized and differential pulse voltammetry （DPV） was used to determine sulfite. The oxidation peak current of sulfite was proportional to the concentration of sulfite over the range of 5.0 ×10^-6-8.0×10^-3 mol/L（r = 0. 9989）, and the limit of detection is 1.0 ×10^-6mol/L （S/N = 3 ）. The recovery of sulfite in red wine samples was found to be in the range of 97% ~ 103%.

关 键 词：纳米金 聚3-甲基噻吩 修饰电极 测定 亚硫酸根 

分 类 号：TS261[轻工技术与工程—发酵工程]