摘要:
建立了土壤和小麦种子、茎杆中苯达嗪丙酯的残留分析方法.研究了高剂量施药条件下土壤中的消解动态,并测定了土壤、小麦种子和茎杆中的最终残留.苯达嗪丙酯的最低检出限为10ng,在土壤和小麦中的最低检出浓度为0.05mg·kg-1.方法的平均添加回收率为88.7%—103.3%,变异系数为4.3%—16.4%.苯达嗪丙酯的消解动态试验表明:高剂量施药条件下苯达嗪丙酯在土壤中的半衰期分别为2.5d(北京)和3.1d(石家庄);当按推荐剂量施药时,小麦收获前10d,在土壤、小麦种子和茎杆中,北京和石家庄两地均未检出苯达嗪丙酯.
关键词:
-
苯达嗪丙酯
/
-
土壤
/
-
小麦
/
-
残留分析
Abstract:
An analytical method for determining the residue level of BAU-9403 (chemical name: propyl 1-(4-chlorophenyl)-1,4-dihydro-6-methyl-4-oxopyridazine-3-carboxylate) in soil, wheat seed and stem was established. The dynamic curve of BAU-9403 in soil was determined when high dosage was used . Its final residue levels in soils ,wheat seed and stem were also monitored. It's found that the minimum detectable amount of BAU-9403 was 10ng, the minimum detectable concentrations of BAU-9403 in soil, wheat seed and stem were 0.05mg·kg-1.The average recoveries and coefficient of variation of the method were 88.7—103.3% and 4.3—16.4%, respectively. The dissipation of BAU-9403 in surface soil were determined. Results showed that the half-life of the decay for BAU-9403 in soil was around 2.5 days (Beijing) and 3.1 days (Shijiazhuang). In field trail test, when BAU-9403 10% EC was applied according to the recommended dosage (at highest dosage( of 1kg·ha-1)), the final residue of BAU-9403 in soil, wheat seed and stem were not detectable at 10days before harvest.
点击查看大图
下载:
