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《Agrochemicals》 2019-01
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Analysis of Quinotrione Residues in Sorghum by HPLC-MS/MS

FENG Yi-zhi;ZHANG Ai-juan;WANG Ci-ming;WANG Wei;QI Xiao-xue;PAN Jin-ju;HAN Ji-feng;LIANG Lin;LIU Wei;Key Laboratory for Chemical Pesticide of Shandong Province, Shandong Academy of Pesticide Sciences;Shandong Cynda Chemical Co., Ltd.;  
[Aims] A rapid and sensitive analytical method for the determination of quinotrione residues in sorghum and straw was established based on high performance liquid chromatography tandem mass spectrometry(HPLC-MS/MS).[Methods] The samples were extracted with acetonitrile and purified with octadecylsilane(C_(18)). The mass spectrometer was performed under multi-reaction monitoring mode. The quinotrione residues were quantified by the external standard method using the matched standard solution to compensate for matrix effect. [Results] The calibration curves for quinotrione were linear in the range of 0.01-5 mg/L with correlation coefficients of more than 0.9992. When the addition level ranged from 0.02 to 2 mg/kg, the average recoveries of quinotrione in sorghum and straw were 86-102%,and the relative standard deviation(RSD) ranged from 2 to 19%. The limit of quantitation(LOQ) was 0.02 mg/kg in different matrices. [Conclusions] This method is simple, rapid and accurate, and can be adapted for the confirmation of quinotrione residues in sorghum samples.
【Fund】: 山东省农业科学院农业科技创新工程(CXGC2018E19)
【CateGory Index】: O657.63;S481.8
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