title: Rapid residue analysis of four triazolopyrimidine herbicides in soil, water, and wheat by ultra-performance liquid chromatography coupled to tandem mass spectrometry.
abstract: A sensitive and effective method for simultaneous determination of triazolopyrimidine sulfonamide herbicide residues in soil, water, and wheat was developed using ultra-performance liquid chromatography coupled with tandem mass spectrometry. The four herbicides (pyroxsulam, flumetsulam, metosulam, and diclosulam) were cleaned up with an off-line C18 SPE cartridge and detected by tandem mass spectrometry using an electrospray ionization source in positive mode (ESI+). The determination of the target compounds was achieved in <2.0 min. The limits of detection were below 1 μg kg(-1), while the limits of quantification did not exceed 3 μg kg(-1) in different matrices. Quantitation was determined from calibration curves of standards containing 0.05-100 μg L(-1) with r(2) > 0.997. Recovery studies were conducted at three spiked levels (0.2, 1, and 5 μg kg(-1) for water; 5, 10, and 100 μg kg(-1) for soil and wheat). The overall average recoveries for this method in water, soil, wheat plants, and seeds at three levels ranged from 75.4% to 106.0%, with relative standard deviations in the range of 2.1-12.5% (n = 5) for all analytes.
authors.affiliation: Key Laboratory of Pesticide Chemistry and Application, Ministry of Agriculture, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China.
authors.forename: Xingang
authors.initials: X
authors.lastname: Liu
authors.forename: Jun
authors.initials: J
authors.lastname: Xu
authors.forename: Yuanbo
authors.initials: Y
authors.lastname: Li
authors.forename: Fengshou
authors.initials: F
authors.lastname: Dong
authors.forename: Jing
authors.initials: J
authors.lastname: Li
authors.forename: Wenchen
authors.initials: W
authors.lastname: Song
authors.forename: Yongquan
authors.initials: Y
authors.lastname: Zheng
mesh_terms: D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D005506:Food Contamination / Q000032:analysis; D006540:Herbicides / Q000032:analysis*; D057230:Limit of Detection; D011743:Pyrimidines / Q000032:analysis; D012989:Soil Pollutants / Q000032:analysis; D052616:Solid Phase Extraction / Q000379:methods; D053719:Tandem Mass Spectrometry / Q000379:methods*; D014230:Triazoles / Q000032:analysis; D014873:Water Pollutants / Q000032:analysis
chemical_list: D006540:Herbicides; D011743:Pyrimidines; D012989:Soil Pollutants; D014230:Triazoles; D014873:Water Pollutants