Determination and analysis of pesticide residues in fieldgrown and greenhouse-grown tomatoes using liquid chromatography-mass spectrometry

The present study aimed to extract pesticide residues in the field and greenhouse-grown tomatoes and homemade paste based on the  (QuEChERS) method before being determined by liquid chromatography-mass spectrometry (LC-MS). The mean difference in percentage reduction of deltamethrin (DLM) and acetamiprid (ACT) in raw tomatoes of greenhouse-grown was obtained at ۹۱.۴۲ and ۹۰.۰۰%, respectively, which was insignificantly more than filed condition (۸۴.۹۱% and ۸۶.۳۴%). Maximum reduction percentages of the DLM in paste under greenhouse and field tomato conditions were achieved by more than ۹۵.۸۶% and ۹۳.۱۱%, respectively. The residual concentration of both DLM (۹۱.۴۲%) and ACT (۹۰.۰۰%) in the greenhouse decreased more than the field (۸۴.۹۱% and ۸۶.۳۴%), respectively. Abamectin(ABA) reached below the MRL in a shorter time after spraying (۲ days). Considering the pre-harvest interval (PHI) period of deltamethrin and abamectin can reach their residual concentration to the MRL in both conditions, which were determined by LC-MS. According to the results of the current study, ۷ and ۵ days can be suggested as the PHI period of the acetamiprid for field and greenhouse-grown tomatoes, respectively. Therefore, using pesticides in the proper dosage, considering appropriate PHI, and harvesting can reduce their residues in agricultural products.

کلیدواژه ها:

Liquid Chromatography-Mass Spectrometry ، Analysis ، QuEchERs method ، Pesticide residues ، Field and Greenhouse-Grown Tomatoes