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环境化学  2015 

磁性介孔硅胶萃取剂的制备及萃取性能研究

Keywords: 磁性介孔硅胶,C18功能化,萃取性能,抗干扰能力

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Abstract:

合成了C18基团修饰的磁性介孔硅胶材料,并利用该材料建立了磁性固相萃取-色谱分析方法,测定了几种环境水样中酞酸酯类(PAEs)污染物的含量.结果表明,该材料具有较大的比表面积(273m2·g-1)和饱和磁通量(29emu·g-1),对水样中痕量的PAEs有较强的萃取能力,而且萃取剂的磁分离特性使得萃取操作更为方便、快捷.在优化条件下,30mg萃取剂在40min内即可从500mL水样中萃取痕量PAEs,回收率可达80%以上.此外,该萃取剂在处理复杂环境样品时仍能保持较强的萃取能力,环境水样中4种PAEs的检测限可达15.6—32.5ng·L-1,加标回收率为62%—109%,相对标准偏差为2%—8%.

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