Multiresidue method for the quantitation of 20 pesticides in aquatic products

As the consumption of aquatic products increased, the need for regulation of pesticide residues in aquatic products also emerged. Thus, in this study, a scheduled multiple reaction monitoring (sMRM) method employing a novel extraction and purification step based on QuEChERS with EDTA was developed for the simultaneous quantitation of 20 pesticides (alachlor, aldicarb, carbofuran, diazinon, dimethoate, dimethomorph, ethoprophos, ferimzone, fluridone, hexaconazole, iprobenfos, malathion, methidathion, methiocarb, phenthoate, phosalone, phosmet, phosphamidon, pirimicarb, and simazine) in aquatic products. Additionally, the present method was validated in the aspects of specificity, linearity (r a parts per thousand yenaEuro parts per thousand 0.980), sensitivity (the limit of quantitation (LOQ) a parts per thousand currency signaEuro parts per thousand 5 ng/g), relative standard deviation, RSD (1.0 % a parts per thousand currency signaEuro parts per thousand RSD a parts per thousand currency signaEuro parts per thousand 19.4 %), and recovery (60.1 % a parts per thousand currency signaEuro parts per thousand recovery a parts per thousand currency signaEuro parts per thousand 117.9 %). Finally, the validated method was applied for the determination of the 20 pesticide residues in eel and shrimp purchased from local food markets. In the present study, QuEChERS with EDTA was successfully expanded to residual pesticide analysis for the first time. The present method could contribute to the rapid and successful establishment of the positive list system in South Korea.