丙炔氟草胺在大豆和土壤中的残留及消解动态
投稿时间：2018-03-19      点此下载全文 HTML
引用本文：张双,刘娜,程功,等.丙炔氟草胺在大豆和土壤中的残留及消解动态[J].农药学学报,2018,20(4):487-494.
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作者单位E-mail
张双 沈阳农业大学 植物保护学院, 沈阳 110866  
刘娜 沈阳农业大学 植物保护学院, 沈阳 110866  
程功 沈阳农业大学 植物保护学院, 沈阳 110866  
杨庆喜 沈阳农业大学 植物保护学院, 沈阳 110866  
纪明山 沈阳农业大学 植物保护学院, 沈阳 110866 jimingshan@163.com 
中文摘要:通过在山东德州、黑龙江哈尔滨和辽宁海城2年3地的田间试验，采用QuEChERS-高效液相色谱-串联质谱（QuEChERS-HPLC-MS/MS）法，研究了丙炔氟草胺在大豆和土壤中的残留及消解动态。结果表明：在0.000 3、0.01和0.1 mg/kg添加水平下，丙炔氟草胺在大豆植株、青大豆、大豆籽粒和土壤中的日内平均添加回收率为89%~112%，日内相对标准偏差（RSD）（n=5）为1.3%~5.3%；日间平均添加回收率为85%~110%，日间RSD （n=15）为0.40%~4.8%。丙炔氟草胺在大豆植株、青大豆、大豆籽粒和土壤中的定量限（LOQ）均为0.000 3 mg/kg，能够满足农药残留限量标准的要求。丙炔氟草胺在大豆植株和土壤中的消解动态均符合一级反应动力学方程，在大豆植株和土壤中的消解半衰期分别为5.8~11.8 d和15.8~24.8 d。采用480 g/L丙炔氟草胺悬浮剂按推荐高剂量（有效成分60 g/hm2）及其1.5倍推存剂量（有效成分90 g/hm2）于播后苗前施药1次，收获期采样时，丙炔氟草胺在大豆植株、青大豆、大豆籽粒和土壤中的最终残留量均低于中国国家标准中规定的丙炔氟草胺在大豆上的最大残留限量（0.02 mg/kg）。
中文关键词:丙炔氟草胺  大豆  土壤  残留  消解
 
Residues and dissipation dynamics of flumioxazin in soybean and soil samples
Abstract:The residue and disspation dynamics of flumioxazin in soybean and soil were investigated by QuEChERS-high performance liquid chromatography-tandem mass spectrometry (QuEChERS- HPLC-MS/MS) method. This study was conducted in three fields including Dezhou in Shandong, Harbin in Heilongjiang and Haicheng in Liaoning for two years. The intra-day average recoveries of flumioxazin in spiked samples with fortified level of 0.000 3, 0.01 and 0.1 mg/kg were between 89% to 112% and the relative standard deviation ranged from 1.3% to 5.3% (n=5). The inter-day average recoveries ranged from 85% to 110% and the relative standard deviation ranged from 0.4% to 4.8% (n=15). The quantitative limits (LOQ) for soybean plant, green soybean, soybean and soil samples were 0.000 3 mg/kg which can meet the requirement of max residue limits of flumioxazin. The dissipation dynamics of flumioxazin in soybean plant and soil fitted the first order kinetics equations, and the dissipation half-lives in the soybean plant and soil were 5.8-11.8 d and 15.8-24.8 d, respectively. When flamioxazin was sprayed to soil once with the application rate of 60 and 90 g (a.i.)/hm2, the final residue of flumioxazin in the soybean plant, green soybean, soybean and soil was, at harvest time, lower than the maximum residue limit of flumioxazin in soybean of China National Standard (0.02 mg/kg).
Key words:flumioxazin  soybean  soil  residue  dissipation
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