Determination of organophosphorus and synthetic pyrethroid pesticide residues and their variability in large size fruit crops

Abstract

BACKGROUND Variability of pesticide residues in food item plays a key role for the evaluation of consumer food safety. However, variability factors (VFs) derived from the large size fruit crops are still scarce. Therefore, the present work was aimed to quantify pesticide residues and to estimate VFs in large size fruit crops of mango and guava. RESULTS A total of 140 mango and 130 guava samples from different marketplaces in Bangladesh were collected to estimate the variability of pesticide residues (acephate, diazinon, malathion, fenitrothion, chlorpyrifos, quinalphos, dimethoate and cypermethrin) by in‐house validated methods based on modified QuEChERS extraction and gas chromatography coupled with electron capture detector (ECD) and flame thermionic detector (FTD). The method was validated at three fortification levels (0.01, 0.10 and 0.30 mg kg−1) and satisfactory recoveries (80–111%) with relative standard deviation (RSDr) ≤ 13% were achieved. A wide variation of residues was found in the analyzed samples. In the case of mango, the ranges of residues were 0.011–0.314, 0.015–0.04, and 0.05–0.291 mg kg−1, respectively, for cypermethrin, chlorpyrifos, and dimethoate, while in the case of guava, the ranges were 0.04–0.113, and 0.03–0.290 mg kg−1, respectively, for cypermethrin and acephate. The average VF for mango was 4.06 and it was 5.70 for guava. CONCLUSION VFs originating from the marketed samples of mango and guava are reported in this study for the first time. The estimated VFs were higher than the default value of 3, therefore, the default VFs should be reconsidered when more data are obtained regarding large size crops. © 2021 Society of Chemical Industry

Development, validation and evaluation of matrix effect of a QuEChERS‐based multiresidue method with low temperature dispersive clean‐up for analysis of 104 pesticides in cumin (Cuminum cyminum) by LC‐MS/MS

“…ME has been proposed to be an integral part of method validation 13 . ME was calculated as the ratio percentage of difference of slope from solvent and matrix matched curve to that of the slope from the linearity curves of solvent 15‐17 . In order to highlight the importance of matrix matched standards in the quantitation, a comparison of quantification using a linearity graph from solvent and matrix matched standards was conducted.…”

Multiple pesticide residue determination in major vegetables purchased from Gazipur district of Bangladesh

“…Among these, the determination of pesticide residues is frequently done using gas chromatography. In Bangladesh, the measurement of pesticide residues is done using gas chromatography in conjunction with a flame thermionic detector in fruits and vegetables (Ahmed et al, 2021;Rahman et al, 2021;Prodhan et al, 2021;), fish and dry fish (Prodhan et al, 2018a;2010;2009;Hoque et al, 2021;), sugercane (Kabir et al, 2007), betel leaf and water (Prodhan et al, 2021a;2021b), because they are quite sensitive for the analysis of organophosphorus pesticides. Numerous studies have been done up to this point for the measurement of pesticide residues in vegetables in Bangladesh (Habib et al, 2021;Nahar et al, 2020;Islam et al, 2021;2019a;Prodhan et al, 2018b;2018c;Hossain et al, 2014;Alam et al, 2022;Parvin et al, 2021;Hasan et al, 2021;Islam et al, 2014;Kabir et al, 2008;2008a).…”

Determination of Organochlorine and Synthetic Pyrethroid Pesticide Residues in Water Samples Collected from Different Locations of Bangladesh

“…Till today, in Bangladesh several researchers have been detected pesticide residues in vegetables [4]- [16], fruits [17], betel leaf [18], sugarcane [19], dry fish [20] and fish [21] [22]. Therefore, it is inevitable that the pond water, fresh water as well as the ground water may be contaminated with the residues of such toxic chemical pesticides used in the above mentioned crops by the farmers of Bangladesh.…”

“…Gas Chromatography coupled with Electron Capture Detector (GC-ECD) is widely used for the quantification of organochlorine and synthetic pyrethroid pesticides as they are very sensitive for the above mentioned groups of pesticides. On the other hand, GC-ECD are cheaper and have lower maintenance costs, hence are more readily available in some countries than mass spectrometers [17]. Therefore, the QuECHERS extraction technique followed by Gas Chromatography is a valuable tool for the quantification of organochlorine and synthetic pyrethroid pesticide residues in water samples.…”