Moltó J C, Picó Y, Font G, Mañes J
Laboratory of Food Chemistry and Toxicology, Faculty of Pharmacy, University of Valencia, Spain.
J Chromatogr. 1991 Aug 30;555(1-2):137-45. doi: 10.1016/s0021-9673(01)87173-9.
Octadecyl (C18)-bonded porous silica was evaluated for the extraction of triazine and organophosphorus pesticides from natural water. The extraction results showed an effective performance when 11 of water was passed through small glass columns containing 500 mg of 50-100-microns C18 bonded porous silica. The adsorbed compounds were removed with ethyl acetate, evaporated to 200 microliters and determined by gas chromatography. The overall average recoveries were greater than 85% except for dimethoate and trichlorfon. Application of this procedure to the analysis of natural water samples gave results that agree well with those obtained by solvent extraction methods.
评估了十八烷基（C18）键合的多孔硅胶从天然水中萃取三嗪和有机磷农药的性能。当11毫升水通过装有500毫克50 - 100微米C18键合多孔硅胶的小玻璃柱时，萃取结果显示出良好的效果。用乙酸乙酯洗脱吸附的化合物，蒸发至200微升，然后用气相色谱法测定。除乐果和敌百虫外，总体平均回收率大于85%。将该方法应用于天然水样分析，所得结果与溶剂萃取法的结果吻合良好。
