期刊
FOOD CHEMISTRY
卷 121, 期 1, 页码 251-256出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2009.11.080
关键词
Pesticide; Tomato; Food analysis; Extraction methods; Gas chromatography
资金
- Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq)
- Fundacao de Amparo A Pesquisa do Estado de Minas Gerais (FAPEMIG)
In this work, a simple and low cost method, based on solid-liquid extraction with low temperature purification (SLE-LTP), was optimized and validated for the determination of chlorpyrifos,;,lambda-cyhalothrin, cypermethrin and deltamethrin in tomato samples. The analyses were performed by the GC-ECD and confirmed by the GC-MS. The method requires 4 g of tomato and an extraction mixture (8.0 mL acetonitrile, 0.5 mL water and 1.5 mL ethyl acetate), which was established by mixture experimental design. After optimization, pesticide recovery rates ranged from 79% to 97%, with a standard deviation of less than 5%. The SLE-LTP analytical characteristics were compared very favorably to the matrix solid phase dispersion technique, which used ethyl acetate and Florisil for extraction. (C) 2009 Elsevier Ltd. All rights reserved.
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