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%.
出处
《分析化学》
SCIE
EI
CAS
CSCD
北大核心
1998年第12期1490-1493,共4页
Chinese Journal of Analytical Chemistry
关键词
多菌灵
玻碳电极
循环伏安法
微分脉冲伏安法
Bavistin, glassy carbon electrode, cyclic voltammetry, differential pulse voltammetry
