تعیین باقیمانده 223 نوع آفت‌کش در تعدادی از محصولات گلخانه‌ای شهرستان جیرفت با استفاده از روش کچرز و کروماتوگرافی گازی-طیف سنجی‌جرمی

pesticides residue pose serious risks to human health and the environment, and in recent years, their high levels in agricultural products have led to the deport of exported crops in this industry. Considering the widespread use of pesticides in Iran greenhouses, especially in Kerman province, and the increasing concerns about pesticide residues in this group of products, an assessment was made on the residue levels of 223 types of pesticides using the QuEChERS method in some greenhouse products using gas chromatography-mass spectrometry (GC-MS). The study, carried out descriptively on 15 cucumber, tomato, and pepper samples to measure various types of organochlorine, organophosphate, pyrethroid, carbamate, triazine, and strobilurin pesticides. For residue extraction, acetonitrile and magnesium sulphate were used in the presence of sodium chloride for hydration and PSA for clean-up. An internal standard calibration curve was used to eliminate matrix effects. The calibration curve for most pesticides ranged from 10-150 μg/kg and a correlation coefficient (r2) equivalent to 0.9985 was obtained. To determine the recovery percentage from spiked samples at concentrations of 25, 10, 50, 100, and 150 nanograms per kilogram (ng/kg), and the addition of internal standard at a level of 150 ng/kg were used on 5 various days. The average recovery of pesticides was between 80 to 120 percent, showing a relative standard deviation of less than 20 percent. The limit of detection (LOD) and the limit of quantification (LOQs) were determined in the ranges of 5-15 and 15-40 μg/kg respectively. The results of this study showed that none of the samples contained pesticide residues above the maximum residue limit (MRLs) set by the Codex Alimentarius of the FAO/WHO.