RESIDUE AND DIETARY RISK ASSESSMENT OF CHLORMEQUAT CHLORIDE IN LIAONING PEANUTS (ARACHIS HYPOGAEA L.)

A detection method for chlormequat chloride (CC) in peanuts was established using ultraperformance liquid chromatography tandem mass spectrometry (UPLC-MS/MS).The residual levels of CC in peanuts and its effects on peanut growth and yield were evaluated.The dietary risk of CC residues in peanuts was assessed according to the guidelines of the Pesticide Residue Joint Meeting (JMPR).The results indicate that the half-life of CC in peanut plants is 1.2 days.Assuming that the degradation of CC is 90%, it takes 7.4 days.The dietary exposure levels of CC residues in peanuts for various populations in China are 0.51-1.40g/(kg bwd), with no dietary risk.The recommended dosage for peanut application is 75 g ai/ha, sprayed once, the dietary intake risk is 0.0046-0.052.The application dose of 225 g ai/ha of CC was sprayed twice, and the residual amount of CC in peanut kernels was 0.2 mg/kg higher than the maximum residue limit (MRL), indicating a residual risk, but the dietary intake risk was at an acceptable level.This study provides an important basis for ensuring the safety of peanut consumption and formulating relevant regulatory policies.