Determination of Chlorantraniliprole in Vegetables, Fruits and Grains by SPE Clean-Up and LC-UV

A method for the determination of chlorantraniliprole in six foodstuffs (including vegetables, fruits and grains) has been developed. The analyte was extracted with acetonitrile from foodstuffs and for the clean-up of raw extracts a florisil cartridge was used. Determination and quantification of chlorantraniliprole were performed by LC with an UV detector. The calibration graphs of chlorantraniliprole in solvent or six blank matrixes were linear within the tested interval 0.01-2 mg L-1, with correlation coefficients of determination over 0.9990. With the exception of some cruciferous vegetables, average recoveries of chlorantraniliprole in tested foodstuffs were between 94.6 and 101.1% at spiking levels of 0.01, 0.05 and 0.1 mg kg(-1), with relative standard deviations ranging from 0.9 to 9.2%. The limit of detection (LOD) of the LC-UV system was 200 pg. The limit of quantification of the entire method was < 0.01 mg kg(-1).