Dissipation kinetics, residue determination and consumer risk assessment of acephate on green pea by gas chromatography–electron capture detector

Abstract

AbstractThe present study on “acephate persistence on green pea” was conducted in SKUAST‐Kashmir. The study aimed to determine the persistence, dissipation kinetics and waiting period of acephate on green pea. Acephate was sprayed at 75% soluble powder (SP) at 560 g a.i.ha−1 at the fruiting stage followed by another application at a 10 day interval. A rapid and accurate method (quick, easy, cheap, effective, rugged and safe, QuEChERS) was used for extraction and the residue was determined by gas chromatography–electron capture detection on a CPSIL‐8CB capillary column (0.25um film thickness, 0.25 mm i.d, 30 m length). At the fortification levels of 0.05, 0.1 and 0.5 mg kg−1, the percentage recovery of acephate on green pea was found in the range of 71–107%. The initial deposit of green pea was estimated to be 0.37 mg kg−1. At the indicated dose, the residue of acephate on green pea dissipated below the limit of quantification of 0.05 mg kg−1 after 10 days. Acephate degradation was quick in green pea, with a half‐life of 4.07 days. For safe eating of green peas, a 10 day waiting period is recommended. The gas chromatography–electron capture detection technique was validated by following the SANTE standards.