Persistence and dissipation behavior of pesticide residues in parsley (Petroselinum crispum) under field conditions

Abstract

The residue level, dissipation behavior, and dietary intake risk of chlorpyrifos-methyl, dimethoate, permethrin, iprodione, metalaxyl, and propargite in parsley (Petroselinum crispum) were investigated under field conditions. Extraction and determination of pesticide residues were carried out by a quick, easy, cheap, effective, rugged, and safe (QuEChERS) method and a gas chromatography/tandem mass spectrometry (GC/MS/MS) system, respec-tively. Dissipation of chlorpyrifos-methyl, dimethoate, permethrin, iprodione, metalaxyl, and propargite in pars-ley followed the first-order kinetics with a half-life (t1/2) of 3.33, 3.30, 2.94, 3.52, 4.10, and 3.38 days, respectively. Based on the dissipation pattern and the maximum residue limits (MRL), preharvest intervals (PHI) of 25, 13, 18, 24, 1, and 16 days are suggested for chlorpyrifos-methyl, dimethoate, permethrin, iprodione, metalaxyl, and propargite in parsley, respectively. The estimated daily intake (EDI) of pesticides ranged from 7.37E-05 (dimeth-oate) to 8.00E-04 (metalaxyl) mg/kg. The chronic risk assessment showed that the hazard quotient (HQ) was <1 and Hazard Index (HI, indicating the cumulative exposure to pesticide residues) was <100%, demonstrating that an intake of pesticide residues from parsley was safe for humans.