Determination of chlorantraniliprole and penoxsulam residues in rice by QuEChERS-UPLC-MS/MS
Objective:To establish a new QuEChERS-ultra-performance liquid chromatography-tandem mass spectrometry(UPLC-MS/MS)method for the detection of chlorantraniliprole and penoxsulam residues in rice.Methods:After the sample was extracted with 0.2％formic acid-acetonitrile,purified with N-propylethylenediamine(PSA)and graphitized carbon black(GCB)packing,0.2％formic acid water and acetonitrile were used as mobile phases for gradient elution,and then subjected to C18 chromatography.UPLC-MS/MS was used to column separation and determination.Results:The limits of quantification(LOQ)of chlorantraniliprole and penoxsulam were both 0.004 mg/kg,and the method detection limits(LOD)were both 0.001 mg/kg.Chlorantraniliprole and penoxsulam had a good linear relationship in the range of 0.002～0.5 mg/L,and their coefficient was greater than 0.993.At the addition levels of 0.05,0.1,and 0.5 mg/kg,the average recovery rates of chlorantraniliprole and penoxsulam were 86％to 110％with the relative standard deviations(RSD)of 1.5％to 6.1％.Conclusion:This method is efficient and simple,has good stability and high sensitivity,and is suitable for the detection of chlorantraniliprole and penoxsulam in rice.
国家科技期刊平台
NSTL
万方数据
维普
