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|Type:||Artigo de periódico|
|Title:||Supercritical extraction of carotenoids and lipids from buriti (Mauritia flexuosa), a fruit from the Amazon region|
|Author:||de Franca, LF|
|Abstract:||Pulp of the buriti fruit (Mauritia flexuosa, Mart.) was extracted with supercritical CO, to obtain oil fractions with a high concentration of vitamins, especially p-carotene. The raw material consisted of a mixture of pulp and peel that was scraped off the immature fruit. The extracted oil was analyzed by gas chromatography and spectrophotometry, and results were compared with those obtained by extraction using hexane as solvent. The oil extracted with hexane showed a content of about 1% carotene. Extraction with supercritical CO2 was capable of removing about 80% of the initial carotene content. Extraction experiments were carried out at pressures of 20 and 30 MPa and temperatures of 313 and 328 K. The extraction curves typically showed the three regions found in supercritical fluid extraction of natural products, i.e. beginning with a straight line characteristic of the constant rate extraction period, followed by the falling rate period, and ending with the diffusion rate period. Experimental data were correlated using the model proposed by Sovova. The model showed good agreement with experimental data. The mass transfer coefficients of the solid phase were obtained by adjusting the model equation. The solubility values calculated are within the range for common vegetable oils. (C) 1999 Elsevier Science B.V. All rights reserved.|
|Editor:||Elsevier Science Bv|
|Appears in Collections:||Artigos e Materiais de Revistas Científicas - Unicamp|
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