Analysis Method for Residue of Thiamethoxam and Chlorantraniliprole in Soil

[Aims] An analytical method for simultaneously detecting thiamethoxam and chlorantraniliprole residue in soil was established.[Methods] The sample was extracted by acetonitrile and dichloromethane,cleaned by Florisil-SPE column and separated by liquid chromatography.The thiamethoxam and chlorantraniliprole were detected by PDA detector at 254 nm respectively and quantified with external standard method.[Results] The average recoveries of the method ranged from 77.18-107.27%,the relative standard deviation was 1.50-8.83%.The lowest detectable concentration of thiamethoxam and chlorantraniliprole in soil samples were 0.01 mg/kg,respectively.[Conclusions] The method was simple and reliable,met with the requirement of pesticide residues analysis,and could be applied for determining thiamethoxam and chlorantraniliprole residue in soil.