多菌灵在玻碳电极上的伏安行为及其应用

应用循环伏安法、微分脉冲伏安法对多菌灵在破碳电极上的电化学行为及其测定进行了研究。在ｐＨ＝９．０的２ｍｏｌ／Ｌ ＮＨ３－ＮＨ４Ｃｌ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。微分脉冲伏安法殉菌灵的检测限为４×１０＾－８ｍｏｌ／Ｌ。多菌灵的浓度在５．０×１０＾－７￣１．０×１０＾－５ｍｏｌ／Ｌ间与微分脉冲伏安峰电流呈线性关系（ｒ＝０．９９４２）。对于１×

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

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%.