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Brazilian Journal of Chemical Engineering

versão impressa ISSN 0104-6632

Resumo

BARROSO, M. S. T. et al. Supercritical fluid extraction of volatile and non-volatile compounds from Schinus molle L.. Braz. J. Chem. Eng. [online]. 2011, vol.28, n.2, pp.305-312. ISSN 0104-6632.  http://dx.doi.org/10.1590/S0104-66322011000200015.

Schinus molle L., also known as pepper tree, has been reported to have antimicrobial, antifungal, anti-inflammatory, antispasmodic, antipyretic, antitumoural and cicatrizing properties. This work studies supercritical fluid extraction (SFE) to obtain volatile and non-volatile compounds from the aerial parts of Schinus molle L. and the influence of the process on the composition of the extracts. Experiments were performed in a pilot-scale extractor with a capacity of 1 L at pressures of 9, 10, 12, 15 and 20 MPa at 323.15 K. The volatile compounds were obtained by CO2 supercritical extraction with moderate pressure (9 MPa), whereas the non-volatile compounds were extracted at higher pressure (12 to 20 MPa). The analysis of the essential oil was carried out by GC-MS and the main compounds identified were sabinene, limonene, D-germacrene, bicyclogermacrene, and spathulenol. For the non-volatile extracts, the total phenolic content was determined by the Folin-Ciocalteau method. Moreover, one of the goals of this study was to compare the experimental data with the simulated yields predicted by a mathematical model based on mass transfer. The model used requires three adjustable parameters to predict the experimental extraction yield curves.

Palavras-chave : Supercritical extraction; Schinus molle L; Essential oil; Phenolic compounds.

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