Residues of Methamidofos, Malathion, and Methiocarb in Greenhouse Crops

The diminution of methamidofos, malathion, and methiocarb in different crops grown in greenhouses has been studied, including the presence of metabolites such as malaoxon, methiocarb sulfoxide, and methiocarb sulfone. The analytical method is based on dichloromethane extraction and GC−PFPD analysis....

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Published in:Journal of agricultural and food chemistry 2002-02, Vol.50 (5), p.1172-1177
Main Authors: Hernández Torres, M. E., Egea González, F. J., Castro Cano, M. L., Moreno Frías, M., Martínez Vidal, J. L.
Format: Article
Language:English
Subjects:
Biological and medical sciences
Capsicum - growth & development
Chromatography, Gas
Cucumis sativus - growth & development
Food industries
Fruit and vegetable industries
Fundamental and applied biological sciences. Psychology
Malathion - analysis
Malathion - pharmacokinetics
Methiocarb - analysis
Methiocarb - pharmacokinetics
Organothiophosphorus Compounds - analysis
Organothiophosphorus Compounds - pharmacokinetics
Pesticide Residues - analysis
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Summary:The diminution of methamidofos, malathion, and methiocarb in different crops grown in greenhouses has been studied, including the presence of metabolites such as malaoxon, methiocarb sulfoxide, and methiocarb sulfone. The analytical method is based on dichloromethane extraction and GC−PFPD analysis. It has been validated establishing performance parameters such as recovery rates, precision, linear ranges, and limits of detection and quantification, which are low enough for ensuring that their corresponding MLRs can be adequately quantified. Samples of treated cucumbers and peppers grown in greenhouses were collected and analyzed during a 15-day period for obtaining the diminution rates of methamidofos and malathion. The behavior of methiocarb in treated green beans and tomatoes has been studied using analysis of variance (ANOVA) as the statistical tool, for establishing the influence of crop, season, application dose, and greenhouse design. Keywords: Pesticide; residue; methamidofos; malathion; methiocarb; greenhouse
ISSN:0021-8561
1520-5118
DOI:10.1021/jf0108112