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Development of Analytical Method for Fipronil Residues in Agricultural Commodities Using GC-ECD/MS
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 Title & Authors
Development of Analytical Method for Fipronil Residues in Agricultural Commodities Using GC-ECD/MS
Ahn, Kyung-Geun; Kim, Gyeong-Ha; Kim, Gi-Ppeum; Hwang, Young-Sun; Kang, In-Kyu; Lee, Young Deuk; Choung, Myoung-Gun;
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 Abstract
BACKGROUND: An analytical method was developed using GC-ECD/MS to precisely determine the residue of fipronil, a phenylpyrazole insecticide used to control a wide range of foliar and soil-borne pests.METHOD AND RESULTS: Fipronil residue was extracted with acetone from representative samples of five raw products which comprised hulled rice, soybean, Kimchi cabbage, green pepper, and apple. The extract was diluted with saline water, and fipronil was partitioned into n-hexane/dichloromethane (20/80, v/v) to remove polar co-extractives in the aqueous phase. Florisil column chromatography was additionally employed for final purification of the extract. Fipronil was separated and quantitated by GC-ECD using a DB-17 capillary column. Accuracy of the proposed method was validated by the recovery from crop samples fortified with fipronil at 3 levels per crop in each triplication.CONCLUSION: Mean recoveries ranged from 86.6% to 106.0% in five representative agricultural commodities. The coefficients of variation were less than 10%. Limit of quantitation of fipronil was 0.004 mg/kg as verified by the recovery experiment. A confirmatory technique using GC/MS with selected-ion monitoring was also provided to clearly identify the suspected residue. Therefore, this analytical method was reproducible and sensitive enough to determine the residue of fipronil in agricultural commodities.
 Keywords
Fipronil;GC-ECD/MS;Residue;
 Language
Korean
 Cited by
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