Zhu You-feng, Xie Zheng-miao, Xu Jian-ming
College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310029, China.
Huan Jing Ke Xue. 2007 May;28(5):1137-41.
Adsorption behavior of metsulfuron-methyl on soils and minerals was investigated using batch experiment. The concentration of metsulfuron-methyl in supernatant was analyzed by capillary electrophoresis (CE) method. Metsulfuron-methyl, whose peak centered at 4.6 min in capillary electrophoresis chromatogram, was well separated from impurities in soil slurry. CE was shown to be fast with low operating cost in the routine determination of the herbicide, which was further confirmed by high performance liquid chromatograph (HPLC). Sorption isotherms were fitted to the Freundlich equation, where the parameter Kf was in the range of 0.82-199.69 for minerals and 1.97-10.48 for soils, respectively. Among the various factors influencing the sorption behavior of metsulfuron-methyl, soil pH appeared to be the most important one. The electrostatic interaction mechanism was applied in the explanation of the sorption behavior of metsulfuron-methyl.
采用批量实验研究了甲磺隆在土壤和矿物上的吸附行为。通过毛细管电泳（CE）法分析上清液中甲磺隆的浓度。甲磺隆在毛细管电泳色谱图中的峰位于4.6分钟处，与土壤浆液中的杂质分离良好。在除草剂的常规测定中，CE显示出快速且操作成本低的特点，高效液相色谱（HPLC）进一步证实了这一点。吸附等温线符合Freundlich方程，其中矿物的参数Kf范围为0.82 - 199.69，土壤的参数Kf范围为1.97 - 10.48。在影响甲磺隆吸附行为的各种因素中，土壤pH似乎是最重要的因素。静电相互作用机制被用于解释甲磺隆的吸附行为。
