用超临界流体萃取和固相萃取分析水中酚类污染物  

Use of Supercritical Fluid Extraction and Solid-Phase Extraction for the Analysis of Phenol Pollutants in Water

作　　者：任丽[1] 王国俊[1] 

机构地区：[1]中国科学院兰州化学物理研究所,兰州730000

出　　处：《分析化学》1997年第10期1172-1176,共5页Chinese Journal of Analytical Chemistry

摘　　要：使用自制的超临界流体萃取仪，比较了从Ｃｈｒｏｍｏｓｏｒｂ、Ｐｏｒａｐａｒｋ和ＧＤＸ系列的８种吸附剂上萃取苯酚、邻硝基酚、邻氯酚、对氯酚、对二甲酚、２，４－二氯酚和２，４，６－三氯酚的回收率。并用萃取回收率比较高的 ＧＤＸ—３０１富集 １Ｌ酸性水样中 １０－７ｇ／ｍＬ级的以上各酚，然后用超临界ＣＯ２脱附。回收率从３２．５％到９２．９％。同时还对超临界ＣＯ２脱附ＧＤＸ－３０１上　各酚的操作条件进行了优化，并考察了加入不同的改性剂及其用量对萃取回收率的影响。Methods for collection and concentration of phenol pollutants from water have been developed. Efficiencies of supercritical fluid extraction (SFE) of phenol, 2-chlorophe- nol, 2-nitrophenol, 2, 5-dimethylphenol, 2, 4-dichlorophenol, 4-chlorophenol and 2, 4, 6- trichlorophenol absorbed on the solid-phase adsorbents of GDX-102, GDX-203, GDX-30l, GDX-40l, GDX-502, Chromosorb 102, Chromosorb l05 and Porapark Q with self-made ap- paratus were compared. Extraction of 1 L water sample containing 1. 11～ 1. 78 × 10-7 g/mL analytes with supercritical fluid extration and solid-phase extration resulted in 32. 5%～ 92. 9% recoveries of phenols. SFE conditions were optimized for the desorption of phenols from GDX-301. The type and volume of modifier to be added were studied.

关 键 词：超临界流体萃取 固相萃取 酚类 水分析 

分 类 号：X132[环境科学与工程—环境科学]