DENG Hui-dan,HE Jia-ling,CHEN Yi-feng,CHENG Tie-yuan,HU Jiang-tao,XUE Kang.Determination of Pethoxamid,Pyrimisulfan and Ipfencarbazone in Grains by Ultra Performance Liquid Chromatography-Tandem Mass Spectrometry[J].Journal of Instrumental Analysis,2026,45(01):1-7.
DENG Hui-dan,HE Jia-ling,CHEN Yi-feng,CHENG Tie-yuan,HU Jiang-tao,XUE Kang.Determination of Pethoxamid,Pyrimisulfan and Ipfencarbazone in Grains by Ultra Performance Liquid Chromatography-Tandem Mass Spectrometry[J].Journal of Instrumental Analysis,2026,45(01):1-7. DOI: 10.12452/j.fxcsxb.25071003.
Determination of Pethoxamid,Pyrimisulfan and Ipfencarbazone in Grains by Ultra Performance Liquid Chromatography-Tandem Mass Spectrometry
A method was proposed for determination of 3 novel herbicides(pethoxamid,pyrimisulfan,ipfencarbazone) residues in grains by ultra performance liquid chromatography-tandem mass spectrometry(UPLC-MS/MS) in combination with QuEChERS pretreatment technology. Samples were extracted with 1% acetic acid in acetonitrile,cleaned up by developed QuEChERS method. The extracts were chromatographically separated using a Waters ACQUITY UPLC
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HSS T3 chromatographic column(2.1 mm×100 mm,1.8 μm) and a gradient elution was carried out using acetonitrile-0.1% formic acid in water. Confirmation was achieved using electrospray ionization(ESI)in positive mode with multiple reaction monitoring(MRM) and quantification by matrix-matched external standard method. The results showed that 3 analytes had good linearity in the concentration ranges of 0.5-100 ng/mL,with correlation coefficient more than 0.996. The limits of detection(LODs) of 3 herbicides were 0.005 mg/kg. The limits of quantitation(LOQs) for pethoxamid and pyrimisulfan were 0.01 mg/kg,and the LOQ of ipfencarbazone was 0.02 mg/kg. The recoveries ranged from 81.3%-107%,with relative standard deviations(RSDs) between 0.64%-6.0%. The method successfully identified pethoxamid residues at contents of 0.057 mg/kg and 0.15 mg/kg in two distinct grain sample batches,further validating its efficacy for detecting pethoxamid,pyrimisulfan,and ipfencarbazone in grain samples.
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