论文部分内容阅读
采用分散固相萃取(QuEChERS)样品前处理方法,建立了超高效液相色谱-串联质谱(UPLC-MS/MS)快速检测大豆和土壤中氟磺胺草醚的残留分析方法.大豆和土壤样品采用乙腈(含0.5%甲酸)提取,N-丙基乙二胺(PSA)或石墨化碳黑(GCB)净化,UPLC-MS/MS外标法检测定量.在0.005—0.5 mg.kg-1添加范围内,氟磺胺草醚在土壤、大豆和大豆植株中的平均回收率在79.4%—109.0%之间,变异系数在3.6%—10.1%之间.在山东、河南、吉林进行了氟磺胺草醚在大豆植株和土壤中的降解动态研究,结果表明,试验点中氟磺胺草醚在土壤中的降解半衰期为8.5—23.7 d;在大豆植株中的降解半衰期为2.7—9.8 d.
A method for the rapid determination of fomesafen in soybean and soil by UPLC-MS / MS was established by using QuEChERS sample preparation method. Soybean and soil samples Acetonitrile (with 0.5% formic acid), N-propyl ethylenediamine (PSA) or graphitized carbon black (GCB), quantified by UPLC-MS / MS external standard method. The average recoveries of fomesafen in soil, soybean and soybean plants ranged from 79.4% to 109.0% with a coefficient of variation of 3.6% -10.1% .Floromethansones were tested in Shandong, Henan and Jilin provinces The results showed that the half-life of fomesafen in soil was 8.5-23.7 d, and the half-life of degradation in soybean was 2.7-9.8 d.