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Liquid crystalline properties and extractability of monoolein-water systems by supercritical carbon dioxide

Author

Summary, in English

The influence of phase structure on the extraction recovery of monoolein from monoolein-water systems by supercritical carbon dioxide was investigated. Two monoolein-water mi

tures at concentrations of 9 wt% water and 18 wt% water, respectively, were studied. H-2-NMR was used to monitor changes of the phase structures in supercritical conditions. The results showed that the phase structure and the water-monoolein interactions play a role on the extraction yield. The monoolein recovery was higher in the 9 wt% water sample in which L-alpha phase was present compared to the 18 wt% water sample in which the L-alpha melted to yield a L-2 phase. When the phase structures were the same in both samples, the extraction recovery was determined by the solubility properties of the components of the system. The changes due to the presence of supercritical carbon dioxide were shown also to depend on the water concentration of the monoolein-water mixture besides the temperature. The 18 wt% mixture showed a L-2 phase structure in all the range of the temperature investigated while the 9 wt% water mixture showed phase changes from L-alpha phase to L-2 phase in the same temperature range. (C) 200

Elsevier Science B.V. All rights reserved.

Department/s

Publishing year

2003

Language

English

Pages

69-78

Publication/Series

Colloids and Surfaces A: Physicochemical and Engineering Aspects

Volume

213

Issue

1

Document type

Journal article

Publisher

Elsevier

Topic

  • Food Engineering
  • Analytical Chemistry
  • Physical Chemistry

Keywords

  • Monoolein
  • Supercritical CO2
  • Extraction
  • NMR

Status

Published

ISBN/ISSN/Other

  • ISSN: 0927-7757