Determination of pesticides in lettuce using solid-liquid extraction with low temperature partitioning

Food Chemistry
Anna I G CostaLaércio Zambolim

Abstract

This work describes the optimization and validation of a method employing solid-liquid extraction with low temperature partitioning (SLE/LTP) together with analysis by gas chromatography with electron capture detection (GC/ECD) for the determination of nine pesticides (chlorothalonil, methyl parathion, procymidone, endosulfan, iprodione, λ-cyhalothrin, permethrin, cypermethrin, and deltamethrin) in lettuce. The method was found to be selective, accurate, and precise, with means recovery values in the range of 72.3-103.2%, coefficients of variation ⩽ 12%, and detection limits in the range 0.4-37 μg kg(-1). The matrix components significantly influence the chromatographic response of the analytes (above 10%). The optimized and validated method was applied to determine the residual concentrations of the fungicides iprodione and procymidone that had been applied to field crops of lettuce. The maximum residual concentrations of the pesticides in the lettuce samples were 13.6 ± 0.4 mg kg(-1) (iprodione) and 1.00 ± 0.01 mg kg(-1) (procymidone), on the day after application of the products.

References

Dec 31, 1997·Journal of Chromatography. a·S J Lehotay
Feb 24, 2001·Journal of Chromatography. a·C S Eskilsson, E Björklund
Jul 25, 2003·Journal of Chromatography. a·Jana Hajslová, Jitka Zrostlíková
Aug 4, 2005·Journal of Pharmaceutical and Biomedical Analysis·Sarah K Branch
Mar 4, 2008·Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment·Yanxue HuZhi Wang
Jul 28, 2010·Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes·Rogério Luiz Da SilvaSandro Navickiene

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