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Amine-based aqueous polymers for the simultaneous titration and extraction of lactic acid in aqueous two-phase systems

Planas, Jordi; Varelas, Vassilios; Tjerneld, Folke LU and Hahn-Hägerdal, Bärbel LU (1998) In Journal of Chromatography B: Biomedical Sciences and Applications 711(1-2). p.265-275
Abstract
The partitioning of 10% (w/w) lactic acid in ethylene oxide propylene oxide (EOPO) random copolymers and dextran T500 aqueous two-phase systems was studied. An analysis of variance design was applied to investigate the effect of pH, polymer concentration, and addition of polyethyleneimine to the aqueous two-phase systems. The lowest lactate partition coefficient of 0.09 was obtained at pH 6 in the systems containing 7.2% (w/w) polyethyleneimine. The use of polyethyleneimine as titrating base during the fermentative production of lactic acid was evaluated in batch fermentations with 100 g/l glucose. Yield and productivity of polyethyleneimine titrated fermentations compared with those obtained in fermentations titrated with NaOH and KOH.
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Lactic acid
in
Journal of Chromatography B: Biomedical Sciences and Applications
volume
711
issue
1-2
pages
265 - 275
publisher
Elsevier
external identifiers
  • Scopus:0032569068
ISSN
1387-2273
DOI
10.1016/S0378-4347(97)00663-4
language
English
LU publication?
yes
id
f12d8d08-af64-4388-9485-602026c90c8a (old id 125598)
date added to LUP
2007-06-28 16:47:33
date last changed
2016-11-18 13:31:51
@misc{f12d8d08-af64-4388-9485-602026c90c8a,
  abstract     = {The partitioning of 10% (w/w) lactic acid in ethylene oxide propylene oxide (EOPO) random copolymers and dextran T500 aqueous two-phase systems was studied. An analysis of variance design was applied to investigate the effect of pH, polymer concentration, and addition of polyethyleneimine to the aqueous two-phase systems. The lowest lactate partition coefficient of 0.09 was obtained at pH 6 in the systems containing 7.2% (w/w) polyethyleneimine. The use of polyethyleneimine as titrating base during the fermentative production of lactic acid was evaluated in batch fermentations with 100 g/l glucose. Yield and productivity of polyethyleneimine titrated fermentations compared with those obtained in fermentations titrated with NaOH and KOH.},
  author       = {Planas, Jordi and Varelas, Vassilios and Tjerneld, Folke and Hahn-Hägerdal, Bärbel},
  issn         = {1387-2273},
  keyword      = {Lactic acid},
  language     = {eng},
  number       = {1-2},
  pages        = {265--275},
  publisher    = {ARRAY(0x981bf70)},
  series       = {Journal of Chromatography B: Biomedical Sciences and Applications},
  title        = {Amine-based aqueous polymers for the simultaneous titration and extraction of lactic acid in aqueous two-phase systems},
  url          = {http://dx.doi.org/10.1016/S0378-4347(97)00663-4},
  volume       = {711},
  year         = {1998},
}