Separation selectivity of aqueous polyethylene glycol-based separation systems: DSC, LC and aqueous two-phase extraction studies

被引：21
作者：
Shibukawa, Masami [1 ]
Ichikawa, Ryoichi [2 ]
Baba, Takayuki [2 ]
Sakamoto, Ryosaku [2 ]
Saito, Shingo [1 ]
Oguma, Koichi [2 ]
机构：
[1] Saitama Univ, Grad Sch Sci & Technol, Sakura Ku, Saitama 3388570, Japan
[2] Chiba Univ, Grad Sch Engn, Dept Appl Chem & Biotechnol, Inage Ku, Chiba 2638522, Japan
来源：
POLYMER | 2008年 / 49卷 / 19期
关键词：
polyethylene glycol; aqueous two-phase system; separation selectivity;
D O I：
10.1016/j.polymer.2008.07.042
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
The distribution behavior of n-alcohols, ketones and nitroalkanes in aqueous liquid chromatography with a column packed with polyethylene glycol (PEG) gel, TSKgel Ether-250, was compared with that in aqueous two-phase systems (ATPSs) formed from PEG and Na2SO4 or (NH4)(2)SO4. The plots of the distribution data obtained for the PEG gel system against those for the ATPS reveal that the separation selectivities exerted by the PEG gel system and the PEG-based ATPS are approximately the same. Differential scanning calorimetry studies on aqueous PEG solutions suggest that PEG polymer forms a hydration structure of which the composition is 50% (w/w) PEG or the hydration number per ethylene oxide is 2.4 and the separation selectivity of the PEG-water systems can be attributed to partition of solute compounds into the hydrated PEG polymer structure. (C) 2008 Elsevier Ltd. All rights reserved.
引用
收藏
页码：4168 / 4173
页数：6
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