Dissipation kinetics, decontamination and risk assessment of cyantraniliprole in/on cabbage using UHPLC

Abstract

A simple and steadfast analytical method was developed and validated for the determination of cyantraniliprole residues in cabbage by using Ultra High Performance Liquid Chromatography (UHLC) – photo diode array detector. The method developed had a valid specificity (RSD < 5%), good linearity (R2 = 0.999), recovery (90.96 – 95.92 %) and satisfactory repeatability. The Limit of Detection and Limit of Quantification values for cyantraniliprole in UHPLC were 0.015 and 0.05 μg g-1, respectively. Under the optimized specifications, the developed method was utilized to examine the dissipation kinetics of from the collected field samples. The mean initial deposit of cyantraniliprole after the second spray was 1.67 and 2.15μg g-1 and reached BDL (0.05 μg g-1) on 10 and 15 days with
the calculated half-lives of 1.47 to 1.84 days at 60 g a.i. ha-1 and 120 g a.i. ha-1 doses, respectively. Boiling the cabbage (100 oC for 10 min) reduced 78.06 % of cyantraniliprole residues as a result of decontamination study. The dietary Risk quotient (RQ) was also negligible to humans.