Abstract

CERON, Leidy J; HURTADO, Andrés M  and  AYALA, Alfredo A. Effect of Pressure and Temperature of Extraction with Supercritical CO₂ on the Yield and Composition of Guava Seed Oil (Psidium guajava). Inf. tecnol. [online]. 2016, vol.27, n.6, pp.249-258. ISSN 0718-0764.  http://dx.doi.org/10.4067/S0718-07642016000600025.

The effect of the pressure (20-35 MPa) and temperature (313-333 K) of extraction with supercritical CO₂ on the yield and composition of guava seed oil using a central composite design was evaluated. The flow of CO₂ and the extraction time were fixed at 30 g/min and 150 minutes, respectively. The oils obtained were analyzed by gas chromatography according to their fatty acid profile. The pressure had a significant effect on the yield. The optimum conditions were 35,7 MPa and 325 K obtaining 13,9 % w/w on the oil yield. The fatty acids identified were linoleic, palmitic, oleic and stearic acids. The pressure showed a statistically significant effect on the content of palmitic acid, decreasing it when the pressure increased.

Keywords : guava; seed oil; supercritical fluid extraction; central composite design; fatty acid composition.

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