Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China.
College of Agronomy, Jiangxi Agricultural University, Nanchang, China.
J Sep Sci. 2018 Apr;41(7):1674-1681. doi: 10.1002/jssc.201700773. Epub 2018 Jan 26.
The dissipations of afidopyropen and its metabolite in wheat plant and soil were determined using a quick, easy, cheap, effective, rugged, and safe method with ultra-high performance liquid chromatography and tandem mass spectrometry under a field ecosystem. The limits of quantification were estimated for both target compounds as 0.001 mg/kg. The recoveries of afidopyropen and its metabolite ranged from 94 to 114% (soil), 90 to 109% (wheat seed) and 81 to 91% (wheat straw) at levels of 0.001, 0.01, 0.1, and 2.0 mg/kg with relative standard deviations ≤7%. The results of the residual dynamics experiments showed that afidopyropen dissipated rapidly in wheat plant and soil. Its metabolite initially showed a tendency of rapid increase followed by a decrease in wheat plant but could not be detected in soil. The data showed that the first + first-order model was more suitable for describing the decline of afidopyropen in wheat and soil. The half-lives of afidopyropen in wheat plant and soil were 1.65 and 1.21 days, respectively.
在田间生态系统下，采用超高效液相色谱-串联质谱法，建立了快速、简便、价廉、有效、耐用、安全的分析方法，用于测定吡氟酰草胺及其代谢物在小麦植株和土壤中的消解动态。两种目标化合物的定量限均估计为 0.001mg/kg。在 0.001、0.01、0.1 和 2.0mg/kg 添加水平下，吡氟酰草胺及其代谢物在土壤中的回收率为 94%114%，在小麦种子中的回收率为 90%109%，在小麦秸秆中的回收率为 81%~91%，相对标准偏差均≤7%。残留动态实验结果表明，吡氟酰草胺在小麦植株和土壤中消解迅速。其代谢物在小麦植株中起初表现出快速增加的趋势，随后减少，但在土壤中无法检测到。结果表明，吡氟酰草胺在小麦和土壤中的降解符合一级动力学(first-order)方程。吡氟酰草胺在小麦植株和土壤中的半衰期分别为 1.65 和 1.21 天。
