多菌灵在玻碳电极上的伏安行为及其应用  

Voltammetric Behavior of Bavistin on Glassy Carbon Electrode and Its Analytical Application

作　　者：王桂芬[1] 朴元哲[1] 朴承允 

机构地区：[1]延边大学化学系,延吉133002

出　　处：《分析化学》1998年第12期1490-1493,共4页Chinese Journal of Analytical Chemistry

摘　　要：应用循环伏安法、微分脉冲伏安法对多菌灵在玻碳电极上的电化学行为及其测定进行了研究。在 ｐＨ＝ ９． ０的 ２ ｍｏｌ／Ｌ ＮＨ３－ＮＨ４ Ｃｌ底液中，对其进行循环伏安扫描，发现于 ０． ６１Ｖ（ｖｓ　Ａｇ／ＡｇＣｌ）产生一灵敏的氧化峰。微分脉冲伏安法测定多菌灵的检测限为 ４ × １０－８ｍｏｌ／Ｌ。多菌灵的浓度在 ５．０ ｘ １０－７～１．０ ｘ １０－５ ｍｏｌ／Ｌ间与微分脉冲伏安峰电流呈线性关系（ ｒ＝０．９９４２）。对于 １× １０－６ ｍｏｌ／Ｌ多菌灵，平行测定 １０次的 ＲＳＤ为 ３．２％。测定了谷物中残留的痕量多菌灵，回收率为９１．０％～９５．８％。The voltammetric behavior of bavistin was investigated by cyclic voltammetry and differential pulse voltammetry on a glassy carbon electrode. In a base solution of 2 mol/L NH3-NH4Cl (pH = 9.0), a sensitive anodic peak was observed by cyclicvoltammetry. The detection limit was 4 x 10-8 mol/L by differential pulse voltammetry. There was a good linear relationship between the differential pulse anodic peak current and the concentration of bavistin in the range from 5.0 x 10-7 to 1. 0 x 10-5 mol/L(r = 0.9942). The relative standard deviation of 1 x 10-6 mol/L bavistin for 10 parallel determination was 3.2%. We also determined bavistin in grains by differential pulse voltammetry. The recoveries of standard addition were in the range of 91 .0 % ~ 95.8%.

关 键 词：多菌灵 玻碳电极 循环伏安法 微分脉冲伏安法 

分 类 号：S482.2[农业科学—农药学] TQ455[农业科学—植物保护]