Departamento de Química, Universidade Federal de Viçosa, 36570-900, Viçosa, MG, Brazil.
Environ Sci Pollut Res Int. 2015 Mar;22(5):3457-66. doi: 10.1007/s11356-014-3557-5. Epub 2014 Sep 23.
A method has been optimized and validated for the determination of fomesafen in soils using solid-liquid extraction with low-temperature partitioning (SLE/LTP) and analysis by liquid chromatography with a high-efficiency diode array detector (HPLC/DAD). The method was used to evaluate the persistence and mobility of this herbicide in different soils cultivated with bean plants. Recovery values were ≥98.9 %, with variations in the repeatability coefficients of ≤15 %, and a detection limit of 7.3 μg kg(-1). Half-life values of fomesafen were between 60 and 71 days in soil cultivated using a no-till system and 99 and 114 days in soil cultivated using a conventional tillage system. The mobility of fomesafen was moderate and mainly influenced by the organic matter content, pH, and soil type. In Red-Yellow Argisol, which has a higher content of organic matter, the leaching of fomesafen was less pronounced. In Red-Yellow Latosol, which has smaller amounts of organic matter and high pH, the leaching of fomesafen was more pronounced.
已优化并验证了一种使用低温分配固相萃取（SLE/LTP）和高效二极管阵列检测器液相色谱（HPLC/DAD）分析测定土壤中氟磺胺草醚的方法。该方法用于评估该除草剂在不同种植豆类的土壤中的持久性和移动性。回收率大于等于 98.9%，重复性系数变化小于等于 15%，检测限为 7.3μgkg(-1)。免耕系统中土壤中氟磺胺草醚的半衰期为 60-71 天，常规耕作系统中土壤中氟磺胺草醚的半衰期为 99-114 天。氟磺胺草醚的移动性为中等，主要受有机质含量、pH 值和土壤类型的影响。在有机质含量较高的红壤黄壤中，氟磺胺草醚的淋溶作用不明显。在有机质含量较少、pH 值较高的红壤中，氟磺胺草醚的淋溶作用较为明显。
