Validation of method for determination of organochlorine pesticides in grain and flour by GC-MS/MS using QuEChERS sample preparation
Abstract
A method for the determination of 9 organochlorine pesticides (a-HCH, β-HCH, γ-HCH, DDE, DDD, DDT, aldrin, heptachlor, hexachlorobenzene) in grain and flour has been validated using GC-MS/MS. The optimal conditions for chromatography and sample preparation based on the QuEChERS method have been selected. The degree of pesticide extraction ranged from 88 to 119%. The range of determined pesticide concentrations was evaluated at 0,002 – 0,020 mg/kg. The relative standard deviation of the analysis results did not exceed 16%. The LOD (limit of detection) values were 0,0003 – 0,0011 mg/kg, while the LOQ (limit of quantification) values were 0,0011 – 0,0034 mg/kg.
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Copyright (c) 2022 Yekatsiaryna М. Pliashak, Alena I. Palianskikh, Ludmila L. Belysheva, and Alina I. Baturevich
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