Determination of 31 Sulfonylurea Herbicide Residues in Soil by QuEChERS/Ultra High Performance Liquid Chromatography-Tandem Mass Spectrometry

KeyWord:QuEChERS  ultra high performance liquid chromatography-tandem mass spectrometry£¨UHPLC-MS/MS£©  soil  sulfonylurea herbicides

Abstract:

      A method based on QuEChERS pretreatment technique and ultra high performance liquid chromatography-tandem mass spectrometry£¨UHPLC-MS/MS£© was developed for the simultaneous determination of 31 sulfonylurea herbicide residues in soil.After optimizing the pretreatment and chromatographic conditions,methanol and 0.1% formic acid +5 mmol/L ammonium acetate,1% acetic acid-acetonitrile and 25.00 mg/mL C18 were used as the mobile phases,extraction solvents and purification agents,respectively.There were good linear relations for 31 sulfonylurea herbicides with their correlation coefficients£¨r2£© no less than 0.998 0.The limits of quantitations£¨S/N=10£© were in the range of 0.012-2.321 ¦Ìg/kg.Average recoveries for the analytes at three spiked levels of 10,100 and 400 ¦Ìg/kg ranged from 71.8% to 119% with their relative standard deviations£¨RSD£© of 0.62%-13%.Except for nicosulfuron,trifloxysulfuron sodium,rimsulfuron,flazasulfuron and halosulfuron methyl,other compounds showed weak matrix effects.With easy operation,good sensitivity and accuracy,this method is suitable for the simultaneous detection of 31 sulfonylurea herbicide residues in soil.