Analysis of Tolfenpyrad in Soils and Cabbage by GC

Tolfenpxrad residues in the samples were extracted by acetone, and determined by GC equipped with NPD detector. The average recoveries ranged from 83.63-105.26% for soils and 83.33-107.14% for cabbage, the coefficient of variation were for 3.87-6.31% for soils and 5.71-6.04% for cabbage. the minimum detectable level in standard samples was 2×10-11 g, the lowest detectable concentration in soils and cabbage was 0.003 mg/kg.