本试验筛选了薄层析展开剂，使辛灭乳油中辛硫磷与灭多威分离良好。确定了灭多威的紫外分析波长为２４０纳米。灭多威分析方法的精密度试验（Ｓ）为００１２，ＣＶ％为０５９％；５次试验平均回收率达９８３％，（Ｓ）为１０８，ＣＶ％为１１％。本方法在１０微克／毫升至８０微克／毫升范围内线性关系良好。本项工作为灭多威的分析提供了一个简捷的方法 This test screening thin-layer developing agent, the symplectic eczema phoxim and methomyl separation well. Determination of methomyl UV analysis wavelength of 240 nm. The precision test (K) of Methomyl was 0.12 and the CV% was 059%. The average recovery of 5 times was 983%, (S) was 108 and CV% was 15. 1%. The method has good linearity in the range of 10 micrograms / milliliter to 80 micrograms / milliliter. This work provides a quick and easy way to analyze Methomyl