Wong_2004_J.Agric.Food.Chem_52_6361

Reference

Title : Multiresidue determination of pesticides in malt beverages by capillary gas chromatography with mass spectrometry and selected ion monitoring - Wong_2004_J.Agric.Food.Chem_52_6361
Author(s) : Wong JW , Webster MG , Bezabeh DZ , Hengel MJ , Ngim KK , Krynitsky AJ , Ebeler SE
Ref : Journal of Agricultural and Food Chemistry , 52 :6361 , 2004
Abstract :

A method was developed to determine pesticides in malt beverages using solid phase extraction on a polymeric cartridge and sample cleanup with a MgSO4-topped aminopropyl cartridge, followed by capillary gas chromatography with electron impact mass spectrometry in the selected ion monitoring mode [GC-MS(SIM)]. Three GC injections were required to analyze and identify organophosphate, organohalogen, and organonitrogen pesticides. The pesticides were identified by the retention times of peaks of the target ion and qualifier-to-target ion ratios. GC detection limits for most of the pesticides were 5-10 ng/mL, and linearity was determined from 50 to 5000 ng/mL. Fortification studies were performed at 10 ng/mL for three malt beverages that differ in properties such as alcohol content, solids, and appearance. The recoveries from the three malt beverages were greater than 70% for 85 of the 142 pesticides (including isomers) studied. The data showed that the different malt beverage matrixes had no significant effect on the recoveries. This method was then applied to the screening and analysis of malt beverages for pesticides, resulting in the detection of the insectide carbaryl and the fungicide dimethomorph in real samples. The study indicates that pesticide levels in malt beverages are significantly lower than the tolerance levels set by the United States Environmental Protection Agency for malt beverage starting ingredients. The use of the extraction/cleanup procedure and analysis by GC-MS(SIM) proved effective in screening malt beverages for a wide variety of pesticides.

PubMedSearch : Wong_2004_J.Agric.Food.Chem_52_6361
PubMedID: 15478993

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Citations formats

Wong JW, Webster MG, Bezabeh DZ, Hengel MJ, Ngim KK, Krynitsky AJ, Ebeler SE (2004)
Multiresidue determination of pesticides in malt beverages by capillary gas chromatography with mass spectrometry and selected ion monitoring
Journal of Agricultural and Food Chemistry 52 :6361

Wong JW, Webster MG, Bezabeh DZ, Hengel MJ, Ngim KK, Krynitsky AJ, Ebeler SE (2004)
Journal of Agricultural and Food Chemistry 52 :6361