Abstract:

A simple and rapid method was developed for determining fenpropathrin and deltamethrin in tea. Pesticides were extracted with acetonitrile and cleaned up by solid phase extraction, detected by high-performance thin-layer chromatography. The results indicated that the detection limits of fenpropathrin (Rf=0.49) and deltamethrin (Rf=0.64) were 20ng and 10 ng, respectively. Recoveries of fenpropathrin and deltamethrin in tea with this analytical method (the concentrations of fenpropathrin and deltamethrin fortified were 0.50~10.0 mg/kg) were 94.8-108% and 90.5-102% respectively. The RSDs were 1.71-6.22% and 3.82-6.39 %, respectively. The precision and accuracy of this method were generally fit for analysis of fenpropathrin and deltamethrin residues in tea.