Determination of 31 Triazine Herbicides in Farmland Soils by High Performance Liquid Chromatography-Tandem Mass Spectrometry / 分析化学

ABSTRACT

A high performance liquid chromatography-tandem mass spectrometric method ( HPLC-MS/MS ) was developed for the simultaneous determination of 31 kinds of triazine herbicides in farmland soils. Samples were extracted by accelerated solvent extraction ( ASE ) and purified by Oasis MCX solid phase extraction ( SPE) cartridges, and then analyzed by HPLC-MS/MS in multiple reaction monitoring ( MRM) mode with positive electrospray ionization. The analytical column was Phenomenex Luna C18 ( 150 mm í 2. 0 mm í3 μm) and the mobile phases were acetonitrile and water containing 0. 1% (V/V) formic acid. The limits of detection (S/N≥3) were 0. 008-0. 440 μg/L. All of the triazine herbicides had good linear responses with r≥0 . 996 and the average recoveries in the spiked levels of 0 . 40-40 . 0 μg/kg ranged from 76 . 9%-102 . 0%with the RSDs of 3 . 4%-10 . 3%. The HPLC-MS/MS method had been applied for the detection of the triazine herbicide residues in farmland soils from Shenyang region and the results showed that atrazine, simazine, prometryne and atrazine-desethyl were the main triazine herbicides in the region.