Methiopyrisulfuron is a novel sulfonylurea herbicide with good activity for annual broadleaf and gramineal weeds control. Present study was to investigate the effects of organic amendments （including peat （PE）, sew...Methiopyrisulfuron is a novel sulfonylurea herbicide with good activity for annual broadleaf and gramineal weeds control. Present study was to investigate the effects of organic amendments （including peat （PE）, sewage sludge （SS）, and humic acid （HA）） on adsorption, desorption and leaching of methiopyrisulfuron in soils. The batch equilibration technique was applied for adsorption-desorption experiments and the leaching was tested through soil column simulated experiments under laboratory conditions. The Freundlich model may well describe adsorption-desorption of methiopyrisulfuron on organic amendments, the natural soil, and amended soils. Organic amendments could not only greatly increase the adsorption capacity of methiopyrisulfuron, but also significantly enhance the hysteresis of desorption of methiopyrisulfuron. The correlations between Kf_ads and organic matter content of amended soils were significant, and the correlations between H and soil organic matter in amended soils with PE, SS, and HA were significant too. The results of soil column experiments indicated that organic amendments greatly decreased leaching of methiopyrisulfuron. This study suggested that PE, SS, and HA could greatly influence environmental behavior of methiopyrisulfuron in soils. Use of organic amendments might be an effective management practice for controlling potential pollution of methiopyrisulfuron to environment.展开更多
[目的]建立23%溴酰·三氟苯悬浮剂中有效成分的分析方法。[方法]采用高效液相色谱(HPLC)法,使用Eclipse Plus C18柱和二极管阵列检测器(DAD),以乙腈和0.1%磷酸水溶液作流动相,分离23%溴酰·三氟苯悬浮剂中的杂质和助剂等,并测...[目的]建立23%溴酰·三氟苯悬浮剂中有效成分的分析方法。[方法]采用高效液相色谱(HPLC)法,使用Eclipse Plus C18柱和二极管阵列检测器(DAD),以乙腈和0.1%磷酸水溶液作流动相,分离23%溴酰·三氟苯悬浮剂中的杂质和助剂等,并测定其主要成分溴氰虫酰胺和三氟苯嘧啶的含量。[结果]采用该分析方法,溴氰虫酰胺和三氟苯嘧啶分离效果良好,2者线性相关系数依次为0.9998和0.9997,标准偏差均为0.04,变异系数分别为0.27%和0.46%,平均回收率分别高达99.87%和99.85%。[结论]该分析方法操作简便,分离效果好,精密度和准确度高,可用于23%溴酰·三氟苯悬浮剂中有效组分的定量分析。展开更多
文摘Methiopyrisulfuron is a novel sulfonylurea herbicide with good activity for annual broadleaf and gramineal weeds control. Present study was to investigate the effects of organic amendments （including peat （PE）, sewage sludge （SS）, and humic acid （HA）） on adsorption, desorption and leaching of methiopyrisulfuron in soils. The batch equilibration technique was applied for adsorption-desorption experiments and the leaching was tested through soil column simulated experiments under laboratory conditions. The Freundlich model may well describe adsorption-desorption of methiopyrisulfuron on organic amendments, the natural soil, and amended soils. Organic amendments could not only greatly increase the adsorption capacity of methiopyrisulfuron, but also significantly enhance the hysteresis of desorption of methiopyrisulfuron. The correlations between Kf_ads and organic matter content of amended soils were significant, and the correlations between H and soil organic matter in amended soils with PE, SS, and HA were significant too. The results of soil column experiments indicated that organic amendments greatly decreased leaching of methiopyrisulfuron. This study suggested that PE, SS, and HA could greatly influence environmental behavior of methiopyrisulfuron in soils. Use of organic amendments might be an effective management practice for controlling potential pollution of methiopyrisulfuron to environment.
文摘[目的]建立23%溴酰·三氟苯悬浮剂中有效成分的分析方法。[方法]采用高效液相色谱(HPLC)法,使用Eclipse Plus C18柱和二极管阵列检测器(DAD),以乙腈和0.1%磷酸水溶液作流动相,分离23%溴酰·三氟苯悬浮剂中的杂质和助剂等,并测定其主要成分溴氰虫酰胺和三氟苯嘧啶的含量。[结果]采用该分析方法,溴氰虫酰胺和三氟苯嘧啶分离效果良好,2者线性相关系数依次为0.9998和0.9997,标准偏差均为0.04,变异系数分别为0.27%和0.46%,平均回收率分别高达99.87%和99.85%。[结论]该分析方法操作简便,分离效果好,精密度和准确度高,可用于23%溴酰·三氟苯悬浮剂中有效组分的定量分析。
