Ionic liquids as adjuvants for the tailored extraction of biomolecules in aqueous biphasic systems
authors Pereira, JFB; Lima, AS; Freire, MG; Coutinho, JAP
nationality International
journal GREEN CHEMISTRY
keywords 2-PHASE SYSTEMS; POLY(ETHYLENE GLYCOL); HUMAN-ANTIBODIES; SALT; PURIFICATION; SOLUBILITY; PROTEINS; RECOVERY; WATER; HYDROPHOBICITY
abstract The potential use of ionic liquids (ILs) as adjuvants in typical polymer-salt aqueous systems for the separation and purification of vital biomolecules is investigated. An innovative study involving the addition of various imidazolium-based ILs to conventional PEG/inorganic salt aqueous biphasic systems (ABS), aiming at controlling their phase behaviour and extraction capability for L-tryptophan, is carried out here. For this purpose, phase diagrams and respective tie-lines for PEG 600/Na(2)SO(4) ABS with the addition of small quantities of IL were established. In addition, the partition coefficients of L-tryptophan were determined in those systems. The results obtained indicate that the addition of small amounts of IL to the typical PEG/inorganic salt aqueous systems could largely control the extraction efficiency for L-tryptophan, and that efficiency depends on the IL employed. Salting-in inducing ILs enhance the partition coefficient of L-tryptophan for the PEG-rich phase while salting-out inducing ILs decrease the partitioning of the amino acid. These results are an interesting advance in biotechnological separation processes regarding the extraction of biomolecules that could be used instead of the common approach of PEG functionalization.
publisher ROYAL SOC CHEMISTRY
issn 1463-9262
year published 2010
volume 12
issue 9
beginning page 1661
ending page 1669
digital object identifier (doi) 10.1039/c003578e
web of science category Chemistry, Multidisciplinary; GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY
subject category Chemistry; Science & Technology - Other Topics
unique article identifier WOS:000281613900024
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journal analysis (jcr 2019):
journal impact factor 9.48
5 year journal impact factor 9.707
category normalized journal impact factor percentile 92.662
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