Article Variability of pesticide residues in mango and guava

DOCUMENT DESCRIPTION

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