Determination of trifluralin residue in aquatic products and edible oils by gas chromatography-negative chemical ionization mass spectrometry

doi:10.3724/SP.J.1123.2013.12013

Abstract

Abstract:

A confirmatory method was established for the determination of trifluralin residue in aquatic products and edible oils with the technique of offline disperse solid phase extraction and gas chromatography-negative chemical ionization mass spectrometry (DSPE-GC-MS/NCI). Trifluralin was extracted from aquatic products and edible oils with acetonitrile, and liquid-liquid partitioning formed by adding anhydrous magnesium sulfate followed by a simple cleanup step known as dispersive solid-phase extraction. The aliquot was analyzed by GC-MS/NCI using isotope internal standard method. The method was reliable and stable. The recoveries of trifluralin were in the range from 80% to 100% at three spiked levels of 1.0, 2.0, and 3.0 μg/kg, and the RSDs were not more than 10.3%. The linearity of method was good from 1 to 40 μg/L, and the LOD was 0.02 μg/kg. This method can be used as a conclusive evidence method for the determination of trifluralin residue in aquatic products and edible oils.

Key words: aquatic products, disperse solid phase extraction (DSPE), edible oils, gas chromatography-negative chemical ionization mass spectrometry (GC-MS/NCI), selected ion monitoring (SIM), trifluralin

CLC Number:

O658

WANG Li, XIA Guanghui, SHEN Weijian, WU Bin, ZHANG Rui, LU Huiyuan, SHEN Chongyu, ZHAO Zengyun. Determination of trifluralin residue in aquatic products and edible oils by gas chromatography-negative chemical ionization mass spectrometry[J]. Chinese Journal of Chromatography, 2014, 32(3): 314-317.

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