Liquid crystalline properties and extractability of monoolein-water systems by supercritical carbon dioxide
Författare
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.
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.
Avdelning/ar
- Fysikalisk kemi
- LTH Ingenjörshögskolan vid Campus Helsingborg
- Department of Food Technology, Engineering and Nutrition
Publiceringsår
2003
Språk
Engelska
Sidor
69-78
Publikation/Tidskrift/Serie
Colloids and Surfaces A: Physicochemical and Engineering Aspects
Volym
213
Issue
1
Dokumenttyp
Artikel i tidskrift
Förlag
Elsevier
Ämne
- Food Engineering
- Analytical Chemistry
- Physical Chemistry
Nyckelord
- Monoolein
- Supercritical CO2
- Extraction
- NMR
Status
Published
ISBN/ISSN/Övrigt
- ISSN: 0927-7757