Department of Analytical Chemistry and Food Technology, University of Castilla-La Mancha, Ciudad Real, Spain.
Anal Bioanal Chem. 2012 Sep;404(5):1529-38. doi: 10.1007/s00216-012-6221-2. Epub 2012 Jul 26.
A magnetic material based on N-methylimidazolium ionic liquid and Fe(3)O(4) magnetic nanoparticles incorporated in a silica matrix has been used to extract and preconcentrate sulfonylurea herbicides, such as thifensulfuron methyl (TSM), metsulfuron methyl (MSM), triasulfuron (TS), tribenuron methyl (TBM) and primisulfuron methyl (PSM) from polluted water samples, prior to their analysis by capillary liquid chromatography with a diode array detector (DAD). Under the optimum conditions, this method allows the determination of TSM, MSM, TS, TBM and PSM in a linear range between 5 and 100 ng mL(-1), with relative standard deviation values lower than 5.3% (n = 10), in all cases. Detection limits ranging between 1.13 and 2.95 ng mL(-1) were achieved. The usefulness of the proposed method was demonstrated by the analysis of river water samples, obtaining recoveries higher than 91%.
一种基于 N-甲基咪唑离子液体和 Fe(3)O(4)磁性纳米粒子的磁性材料被用于从污染水样中提取和预浓缩磺酰脲类除草剂，如噻吩磺隆甲酯（TSM）、甲磺隆甲酯（MSM）、三唑磺隆（TS）、苄嘧磺隆甲酯（TBM）和吡嘧磺隆甲酯（PSM），然后用二极管阵列检测器（DAD）进行毛细管液相色谱分析。在最佳条件下，该方法允许在 5 至 100ngmL(-1)之间的线性范围内测定 TSM、MSM、TS、TBM 和 PSM，在所有情况下，相对标准偏差值均低于 5.3%（n=10）。检测限在 1.13 至 2.95ngmL(-1)之间。该方法通过对河水样品的分析得到了验证，回收率高于 91%。
