A Simple LC-MS/MS Method for Estimation of Chlorantraniliprole Residues and its Dissipation Kinetics in/on Grape Berries and Cropped Soil

An analytical method for the estimation of chlorantraniliprole residue in grape berries and soil is reported and has been applied to study its dissipation kinetics. Acetonitrile (for grapes) and methanol (for soil) were used as the extracting solvents. Recoveries in grape berries and soil at 0.05, 0.25 and 0.50 μg kg⁻¹ fortification levels were in the range of 96.79–99.50 and 99–102 per cent respectively, with per cent RSD < 10 in both the matrices. A six point matrix match linearity performance from 0.05 to 10 μg kg⁻¹ showed r² = 0.999. Limit of detection (LOD) and limit of quantitation (LOQ) of the method were 0.016 and 0.05 μg kg⁻¹ for grapes and 0.01 and 0.03 μg kg⁻¹ for soil. The half life (T_1/2) of chlorantraniliprole in/on grapes was 8 d at T1 and 10 d at T2 doses respectively. Residues in soil were below detection limit.