除草剂乙草胺、异丙甲草胺的光降解及其致突变性  

The photodegradation of acetochlor and metolachlor and their mutagenicity.

作　　者：王琪全[1] 刘维屏[1] 

机构地区：[1]浙江大学化学系环境与资源化学研究所

出　　处：《中国环境科学》1999年第1期1-4,共4页China Environmental Science

基　　金：国家自然科学基金

摘　　要：对两种常见的酰胺类除草剂乙草胺、异丙甲草胺的光降解进行了研究，采用Ａｍｅｓ试验方法对母体及其光降解产物的致突变性进行了检验．结果表明，初始ｐＨ值的变化对这两种除草剂的光降解速率无明显影响，异丙甲草胺比乙草胺更易于发生光降解．乙草胺在光降解前后均表现出无致突变性；异丙甲草胺本身具有致突变性，在光降解过程中未表现出有其它致突变性物质产生．The photodegradation of acetochlor and metolachlor was studied. The mutagenicity of photodegradation pro ducts were determined by Ames test. The results showed that the change of original pH performed no significant influence on the photodegradation rate of these two herbicides. Metolachlor was easier to be photodegradated than acetochlor. Aceto chlor and its photodegradation products existed no mutagenicity, while metolachlor showed mutagenicity. It seemed that there was no other mutagenic substance generated during the photodegradation of metolachlor.

关 键 词：乙草胺 异丙甲草胺 光降解 致突变性 除草剂 

分 类 号：TQ457[化学工程—农药化工]