期刊
FOOD CHEMISTRY
卷 125, 期 4, 页码 1436-1442出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2010.10.041
关键词
Cereals; Pesticides; Sample preparation; Chromatography; GC-MS
资金
- Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq)
- Coodernacao de Aperfeicoamento de Pessoal de Nivel Superior (CAPES) Brazil
In this study a multiresidue method for the determination of 24 pesticides in wheat white flour and bran using gas chromatography coupled to mass spectrometry with negative chemical ionisation and selected ion monitoring (GC-MS (NCI-SIM)) was developed and validated The QuEChERS method was used for the extraction of different pesticides The method was validated evaluating the following parameters linearity limit of detention limit of quantification matrix effect as well as precision and accuracy evaluating the percentage of recovery at four different spike levels The linear range used in the calibration curves was from 1 0 to 100 mu g L-1 for wheat and 2 0 to 200 mu g L-1 for flour and bran both with values of r(2) > 0 99 The recoveries had been considered satisfactory presenting values between 70% and 120% with RSD < 20% for the majority of compounds (C) 2010 Elsevier Ltd All rights reserved
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