Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/322967
Type: Artigo
Title: Revisiting Quick, Easy, Cheap, Effective, Rugged, And Safe Parameters For Sample Preparation In Pesticide Residue Analysis Of Lettuce By Liquid Chromatography–tandem Mass Spectrometry
Revisiting quick, easy, cheap, effective, rugged, and safe parameters for sample preparation in pesticide residue analysis of lettuce by liquid chromatography–tandem mass spectrometry
Author: Konatu, Fernanda Ribeiro Begnini
Breitkreitz, Márcia Cristina
Jardim, Isabel Cristina Sales Fontes
Abstract: A new analytical method using a quick, easy, cheap, effective, rugged, and safe (QuEChERS) procedure for multi-residue determination of 16 multiclass pesticides in five different types of lettuce was developed using high-performance liquid chromatography coupled to electrospray ionization tandem mass spectrometry. The QuEChERS procedure was optimized in terms of extractor solvent, partitioning salts and clean-up salts, through recovery, gravimetric analysis and matrix-effect studies. Microwave extraction and the use of disposable pipette extraction in the clean-up step were also tested, providing interesting alternatives to the traditional QuEChERS method, depending on the pesticides properties. The use of a laboratory-made phenyl-type sorbent, based on silica and poly(2-phenylpropyl)methylsiloxane, was studied in the clean-up step, presenting promising results as a substitute for primary secondary amine (PSA). The optimized QuEChERS method was defined employing acetonitrile, citrate buffer and clean-up with PSA, MgSO4 and graphitized carbon black. The method developed was validated according to Document SANTE/11945/2015 and proved to be selective, accurate and precise, obtaining limits of quantification from 5 μg kg−1 and recoveries in the range of 70–120% with relative standard deviation ≤20%. The method was applied on 14 real samples from commercial markets in Brazil and 21% of the samples analyzed presented irregularities, according to local pesticides regulations. © 2016 Elsevier B.V.
A new analytical method using a quick, easy, cheap, effective, rugged, and safe (QuEChERS) procedure for multi-residue determination of 16 multiclass pesticides in five different types of lettuce was developed using high-performance liquid chromatography
Subject: Lettuce
Liquid Chromatography
Pesticides
Quechers
Tandem Mass Spectrometry
Alface
Agrotóxicos
QuEChERS, Método de
Cromatografia líquida
Espectrometria de massas sequencial
Country: Países Baixos
Editor: Elsevier
Citation: Journal Of Chromatography A. Elsevier B.v., v. 1482, p. 11 - 22, 2017.
Rights: fechado
Identifier DOI: 10.1016/j.chroma.2016.12.061
Address: https://www.sciencedirect.com/science/article/pii/S0021967316317113
Date Issue: 2017
Appears in Collections:IQ - Artigos e Outros Documentos

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