Phase equilibrium in polyethylene glycol/maltodextrin aqueous two-phase systems

Authors
da Silva, LHM Meirelles, AJA
Citation
Lhm. Da Silva et Aja. Meirelles, Phase equilibrium in polyethylene glycol/maltodextrin aqueous two-phase systems, CARBOHY POL, 42(3), 2000, pp. 273-278
Citations number
20
Categorie Soggetti
Agricultural Chemistry","Chemistry & Analysis","Organic Chemistry/Polymer Science
Journal title
CARBOHYDRATE POLYMERS
ISSN journal
01448617 → ACNP
Volume
42
Issue
3
Year of publication
2000
Pages
273 - 278
Database
ISI
SICI code
0144-8617(200007)42:3<273:PEIPGA>2.0.ZU;2-U
Abstract
The polysaccharide maltodextrin (MD) can provide a low cost alternative to the fractionated dextran for the use with polyethylene glycol (PEG) in aque ous two-phase. two-polymer systems. The physical characteristics of these M D/PEG systems are similar in many respects to dextran/PEG systems. These sy stems' behaviour was studied at 25 degrees C and local atmospheric pressure (727 mmHg) under several concentration ratios and molecular weights of MD/ PEG. Molecular weight of PEG was 1450, 8000 and 10 000; and MD's molecular weight was 2000 and 4000. This paper establishes phase diagram data, subseq uently adjusting the NRTL model for the calculation of activity coefficient s. The results are satisfactory and show the good descriptive quality of th e model. (C) 2000 Elsevier Science Ltd. All rights reserved.