敌百虫催化联苯胺-过硼酸钠体系的极谱行为及其应用  

Studies On Polarographic Behavior of Trichlorfon-Catalyzed Reaction of Benzidine-Sodium Perborate System and Its Application

作　　者：祝海珍[1] 杨明敏[1] 郑修文[1] 赵道远[1] 

机构地区：[1]南京农业大学理学院,南京210095

出　　处：《分析化学》2004年第12期1649-1652,共4页Chinese Journal of Analytical Chemistry

基　　金：江苏省科技攻关资助项目(No.BE20022350)

摘　　要：用单扫描极谱方法研究发现敌百虫催化联苯胺过硼酸钠体系产生一灵敏的还原峰,其峰电位为-0.7V(vs.SCE),峰电流与敌百虫的浓度在8×10-7～1×10-4mol/L范围内呈良好的线性关系(r=09991),据此提出了一种检测敌百虫的新方法。检出限为8×10-8mol/L。对8×10-5mol/L的敌百虫溶液进行6次平行实验,RSD为3.06%。研究了电极反应机理,并应用本方法测定植物样品中敌百虫的残留量,结果良好。Based on trichlorfon-catalyzed reaction of benzidine-sodium perborate by single sweep oscillopolarography, a new method is proposed for the determination of trichlorfon. The peak potential is - 0.7 V (vs. SCE). There is a good linear relationship between peak current and concentration of trichlorfon in the range from 8.0 x 10(-7) to 1.0 x 10(-4) mol/L ( r = 0.9991). The detection limit is 8.0 x 10(-8) mol/L. The relative standard deviation of 8.0 x 10(-5) mol/L trichlorfon for 6 parallel determinations is 3.1%. The mechanism of electrode reduction has been discussed. The method has been applied to the determination of residues of trichlorfon in plant with satisfactory result.

关 键 词：联苯胺 SCE 行为 RSD 过硼酸钠 极谱 峰电位 敌百虫溶液 定植 浓度 

分 类 号：O657.14[理学—分析化学] S858[理学—化学]