期刊
TALANTA
卷 77, 期 3, 页码 948-952出版社
ELSEVIER
DOI: 10.1016/j.talanta.2008.07.032
关键词
Supercritical extraction; Ultrasound-assisted extraction; Carotenoids; Microalgae; Dunaliella salina
资金
- Andalusia Council
In the work described here the extraction processes of carotenoids and chlorophylls were analysed using two extraction techniques, namely ultrasound-assisted extraction and supercritical fluid extraction, and the results are compared. The solvents used for the ultrasound-assisted extraction were N,N'-dimethylformamide and methanol and for the supercritical fluid extraction, carbon dioxide. The raw material studied was Dunaliella salina, a microalgae characterized by the high levels of carotenoids present in its cellular structure. The results indicate that I he supercritical fluid extraction process is comparable to the ultrasound-assisted extraction when methanol is used as solvent. In addition, the supercritical extraction process is more selective for the recovery of carotenoids than the conventional technique since it leads to higher values for the ratio carotenoids/chlorophylls. Finally, the effects of pressure and temperature on the extraction yields of the supercritical fluid extraction process were studied. (C) 2008 Elsevier B.V. All rights reserved.
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