This study was carried out to establish a multiresidue analysis method of pesticides applicable to the Positive List System (PLS) in Korea. A simple, sensitive and selective, method with liquid chromatography-tandem mass spectrometry (LC-MS/MS) was developed to detect 52 pesticides in brown rice, orange and green pepper using the QuEChERS European standard (EN) method. Sample preparation was performed by extracting with acetonitrile, followed by salting-out with sodium chloride, and a cleanup step using dispersive solid phase extraction. The limits of quantification were in the range 0.003-0.01 mg/kg by matrix-matched calibration curves. The recoveries at 0.01 and 0.1 mg/kg were within 60-130% (n=6) associated relative standard deviations <25%. Based on these results, this multiresidue analysis method proved to be a highly efficient, robust and accurate approach suitable for the monitoring of LC amenable pesticides in accordance with PLS requirements. This method can surely be used as the official method for monitoring pesticides applicable to the PLS of imported agricultural products in Korea.

Multiresidue pesticides analysis in agricultural products by liquid chromatography - tandem mass spectrometry for positive list system in Korea

248th National Meeting (2014)

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