示波极谱法测定环境中痕量叶蝉散

Determinatiou of Trace Amount or Etrofolan in Envirinment by Oscillopolarography

本文研究了叶蝉散的水解产物邻异丙基酚在硼酸-NaOH－EDTA底液中与MBTH偶合生成物，在电位-0.35V（VS、S、C、E）处的极谱行为，加入等体积的乙醇可提高方法灵敏度和稳定性。方法灵敏度高，较比色法高一个多数量级；线性范围广，0．04～1．5PPm与峰高成正比；合并变异系数4.1％；平均回收率96％～99．2％；方法操作简便、快速，干扰少；样品分析结果与比色法无差异。

The polarographie behaviour of ayocompound formed MBTH with O- isopropenyl- phenol of Etrofolan hydrolysate in the boron-hydroxide-NaOH- EDTA sestem at the potential of- 0. 35V(Vs. S. C. E)has been studied. The sensitivity and stability has been in-creased by the addition of ethanal(1 + 1). The method is hight sensitive. It is higher ten times that colorimetry. The Peak current wasdirectty proportional concentration of Etrofolan in the range of 0.04 - 1. 5ppm. The ralative standard deviation and recovery is 4. 1%and 96% ~ 99. 2% respectively. The method is simple and reproducible. it gives almost the same resultsas those of the colorimetry.