35%甲辛氟氯氰乳油中辛硫磷含量测定

Determination of the Content of Phoxim in 35% Parathion-methyl,Phoxim and Cyhlothrin EC

试样以丙酮溶解 ,并以薄层层析分离除去杂质 ,刮下有效成分谱带 ,溴化法定量。其变异系数为 1.40 ,平均回收率为 10 0 .11。

The specimen is dissolved by acetone,the impurity is removed through c hromatographic separation of thin layer,the band of active constituents is scrap ed, and the quantity is determined by bromination method. Its variation coeffici ent is 1.40, and average recovery ratio is 100.11.