The effects of pH on the partitioning of aromatic acids in a polyethylene glycol/dextran aqueous biphasic system

被引：5
|
作者：
Moody, Melanie L. [1 ]
Huddleston, Jonathan G. [1 ,2 ]
Berton, Paula [3 ]
Zhang, Jianhua [1 ]
Rogers, Robin D. [1 ,3 ]
机构：
[1] Univ Alabama, Dept Chem, Box 870336, Tuscaloosa, AL 35487 USA
[2] Brunel Univ, Inst Environm Hlth & Soc, Adv Bioproc Ctr, London, England
[3] McGill Univ, Dept Chem, 801 Sherbrooke St West, Montreal, PQ H3A 0B8, Canada
来源：
SEPARATION SCIENCE AND TECHNOLOGY | 2017年 / 52卷 / 05期
关键词：
Aqueous biphasic system; aromatic acids; pH effect; polyethylene glycol; dextran; METAL-ION SEPARATIONS; MULTICOMPONENT POLYMER-SOLUTIONS; LOW-MOLECULAR-WEIGHT; 2-PHASE SYSTEMS; RELATIVE HYDROPHOBICITY; POLY(ETHYLENE GLYCOL); FREE-ENERGY; ELECTROSTATIC INTERACTIONS; PROTEIN SEPARATION; ORGANIC-COMPOUNDS;
D O I：
10.1080/01496395.2016.1269809
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Distribution ratios of acidic, neutral, and basic compounds were determined in polyethylene glycol (PEG)-6000/Dextran-75000 aqueous biphasic systems (ABSs) at incremental pH values. The nature of the solute species present at each pH was identified using speciation diagrams, and it was determined that the distribution ratios were related to their charge, with maximum distribution to the upper PEG-rich phase when the neutral species were dominant. The results suggest that this ABS is tunable with simple modifications of pH leading to increasing selectivity for specific target solutes.
引用
收藏
页码：843 / 851
页数：9
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