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SFE kinetics of bioactive compounds from Helianthus annuus L.
Author(s) -
Casas Lourdes,
Mantell Casimiro,
Rodríguez Miguel,
Torres Ascensión,
Macías Francisco A.,
Martínez de la Ossa Enrique J.
Publication year - 2009
Publication title -
journal of separation science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.72
H-Index - 102
eISSN - 1615-9314
pISSN - 1615-9306
DOI - 10.1002/jssc.200800663
Subject(s) - extraction (chemistry) , helianthus annuus , chromatography , supercritical fluid extraction , solvent , chemistry , supercritical fluid , sunflower , kinetics , sample preparation , organic chemistry , mathematics , physics , combinatorics , quantum mechanics
The kinetics of the supercritical fluid extraction of bioactive compounds from sunflower using CO 2 as solvent were studied in order to establish an efficient method for this extraction. The influence of time of extraction at different solvent flow rates was investigated. The extraction pressure and temperature were optimized in previous studies and these values used were 400 bar and 50°C. The extraction yields and the bioactivity levels of the extracts were also analysed. The results indicate that the most appropriate extraction time is between 120 and 180 min depending on the solvent flow and the pretreatment of the sample. The dried sample extracted at 40 g/min, the congealed sample extracted at the same flow and 180 min, and the dried sample extracted at 25 g/min for 120 min showed the best activity profiles. The extractions were carried out in a pilot plant with an extraction vessel with a capacity of 2 L.