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|Type:||Artigo de periódico|
|Title:||Supercritical CO(2) extraction of carotenoids from pitanga fruits (Eugenia uniflora L.)|
|Author:||FILHO, Genival L.|
ROSSO, VeridianaV. De
MEIRELES, M. Angela A.
ROSA, Paulo T. V.
OLIVEIRA, Alessandra L.
MERCADANTE, Adriana Z.
CABRAL, Fernando A.
|Abstract:||Supercritical carbon dioxide (SC-CO(2)) extraction was employed to extract carotenoids from the freeze-dried pulp of pitanga fruits (Eugenia uniflora L.), an exotic fruit, rich in carotenoids and still little explored commercially. The SC-CO(2) extraction was carried out at two temperatures, 40 and 60 degrees C, and seven pressures, 100, 150, 200, 250, 300, 350 and 400 bar. The carotenoids were determined by high-performance liquid chromatography connected to photodiode array and mass spectrometry detectors. Lycopene, rubixanthin and P-cryptoxanthin were the main carotenoids present in the freeze-dried pitanga pulp, whereas beta-cryptoxanthin concentration was negligible in the SC-CO(2) extracts, for all the investigated state conditions. The maximum recovery of carotenoids was obtained at 60 degrees C and 250 bar, extracting 55% of the total carotenoid content, 74% of the rubixanthin and 78% of the lycopene from the pulp. Under these state conditions, the total carotenoid concentration in the extract was 5474 mu g/g, represented by 66% lycopene and 32% rubixanthin. The experimental state conditions produced different SC-CO(2) extracts with respect to the extraction yield and concentration of different carotenoids, indicating that the supercritical carbon dioxide was selective in the extraction of the pitanga carotenoids as a function of temperature and pressure. (C) 2008 Elsevier B.V. All rights reserved.|
supercritical fluid extraction
|Editor:||ELSEVIER SCIENCE BV|
|Citation:||JOURNAL OF SUPERCRITICAL FLUIDS, v.46, n.1, p.33-39, 2008|
|Appears in Collections:||FEA - Artigos e Outros Documentos|
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