二氯喹啉酸在玻碳电极上的伏安行为及测定  

Voltammetric Behaviors of Quinclorac at a Glassy Carbon Electrode and Its Practical Application

作　　者：杨春英[1] 王桂芬[1] 林晓华[1] 王爽[1] 李春哲[1] 

机构地区：[1]延边大学理学院化学系,吉林延吉133002

出　　处：《分析科学学报》2008年第5期569-572,共4页Journal of Analytical Science

摘　　要：应用循环伏安法（CV）和微分脉冲溶出伏安法（DPSV）在玻碳电极（GCE）上对二氯喹啉酸进行了研究，发现二氯喹啉酸在pH=2的B-R（Britton-Robinson）缓冲底液中于＋0．954V（vs．SCE）左右产生一个尖锐的阳极氧化峰。实验考察了pH值、富集时间、扫速、静止时间的影响。该法二氯喹啉酸在1．0×10^-6～1．0×10^-4mol／L范围内与峰电流呈线性关系（r=0．9988），检出限为6．0×10^-7mol／L。用该方法对二氯喹啉酸进行了实际测定；对二氯喹啉酸的电极反应机理进行了初步探讨。The voltammetric behaviors of quinclorac at a glassy carbon electrode was studied by cyclic voltammetry and differential-pulse stripping voltammetry. A oxidative peak of quinclorac was obtained at the potential of ＋0. 954 V（vs. SCE） in pH 2 B-R buffer solution. The impact of pH, accumulation time and scan rate were discussed. The peak current was linear to the concentration of quinclorac ranging from1. 0×10^-6 to 1.0×10^-4 mol/L （r=0.9988） and the detection limit was 6.0×10^-7mol/L. The determination of quinclorac has been performed and the mechanism for the electrode process was also proposed.

关 键 词：二氯喹啉酸 循环伏安法 微分脉冲溶出伏安法 玻碳电极 

分 类 号：O657.1[理学—分析化学]