TLC-EI测定杀虫烟剂残留量的研究

应用TLC-EI(薄层-酶抑制)技术并采用CS-910型仪,对有机磷类及氨基甲酸酯类某些农药混合组成的杀虫烟剂燃烧后的残留量进行测定,结果一般可达ng级.经测定,能把Ⅲ-SMD烟剂中的西维因、马拉硫磷、敌敌畏三种农药分开.色斑可长期保留,Rf值分别为0.710、0.875、0.538.在大气烟雾中的有效烟率分别为4.16％、2.13％、0.76％.3h内松针上最高残留量分别为102.715、19.332、6.701ppm.12h后残渣中农药残留量分别为76、13.42、4.56ppm.用大白鼠肝酯酶测定农药的最小检出量分别为1.21、7.45、0.112ng.

DETERMINATION OF INSECTICIDE SMOKE RESIDUE BY TLC-EI TECHNIQUE

The TLC-EI technique was selected to analyze the smoke residue from combustion of an insecticides mixture consisting of organophos-phorus and carbamate. The sensitivity of the technique could usually reach ng grade.Under the designed experimental conditions, three insecticides in the smoke residue could be separated and the color spots of these insecticides would stay for a relatively long time. The Rf values for these insecticides are 0.71,0.875 and 0.538 respectively.By using the procedure, the residual concentrations in pine needles within threehours after insecticide application were 102.715,19.3315 and 6.701 ppm respectively.