A method was developed to determine pesticides in wines. The pesticides were extracted from the wine using solid-phase extraction on a polymeric cartridge, and the coextractives were removed with an aminopropyl-MgSO(4) cartridge. Analysis was performed using capillary gas chromatography with electron impact mass spectrometric detection in selective ion monitoring mode (GC-MSD/SIM). Three injections are required to analyze all 153 organohalogen, organonitrogen, organophosphate, and organosulfur pesticides and residues. Pesticides were confirmed by retention times of the target ions and three qualifier-to-target ion ratios. Detection limits for most of the pesticides were less than 0.005 mg/L, and quantitation was determined from approximately 0.01 to 5 mg/L. Spike recoveries were performed by fortifying red and white wines at 0.01 and 0.10 mg/L. At the 0.01 ppm level, the spike recoveries were greater than 70% for 116 and 124 pesticides (out of 153) in red and white wines, respectively, whereas at the higher spike concentration of 0.10 mg/L, the recoveries were greater than 70% for 123 and 128 pesticides in red and white wines, respectively. The recoveries of less than 70% were most likely from pesticide polarity or lability, resulting in the inefficient adsorption of the pesticide to the polymeric sorbent, ineffective elution of the pesticide from the sorbent, or thermal degradation of the pesticide under GC-MSD conditions.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.