Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.14/9940
Título: Supercritical fluid extraction of carotenoids and chlorophylls a, b and c, from a wild strain of Scenedesmus obliquus for use in food processing
Autor: Guedes, A. Catarina
Gião, Maria S.
Matias, Ana A.
Nunes, Ana V. M.
Pintado, M.E.
Duarte, Catarina M. M.
Malcata, F. Xavier
Palavras-chave: Supercritical fluid extraction
Food-grade ingredients
Data: 2013
Editora: Elsevier
Citação: GUEDES, A. Catarina ...[et al.] - Supercritical fluid extraction of carotenoids and chlorophylls a, b and c, from a wild strain of Scenedesmus obliquus for use in food processing. Journal of Food Engineering. ISSN 0260-8774. vol.16, nº2 (2013) p.478-482
Resumo: Faster and more selective extraction methods are urged to recover food-grade pigments and 29 antioxidants from microalgae – which do not resort to food-incompatible and environment30 unfriendly solvents. Hence, this study ascertained the influence of pressure, temperature, CO2 31 flow rate and a polar co-solvent upon the yields of carotenoids and chlorophylls in supercritical 32 fluid extraction of Scenedesmus obliquus. The highest carotenoid yield was attained at 250 bar 33 and 60 ºC. The yields of chlorophylls, when using plain CO2, increased slightly with pressure, but 34 decreased with temperature and CO2 flow rate; the highest yield of chlorophyll a was at 4.3 gCO2.min-135 , whereas ethanol as co-solvent increased all yields except that of chlorophyll c. The 36 highest ratio of total carotenoids to chlorophyll a was reached at 250 bar and 60 ºC. A remarkable 37 selectivity was observed under these operating conditions, which may enable easy separation and 38 purification of the aforementioned pigments.
Descrição: Research Note
Peer review: yes
URI: http://hdl.handle.net/10400.14/9940
Versão do Editor: http://dx.doi.org/10.1016/j.jfoodeng.2012.12.015
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