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Mathematical modeling of Ocimum basilicum L. supercritical carbon dioxide extraction

In this study, the effects of pressure and temperature on supercritical extraction of Ocimum basilicum L (extraction yield and aromatic compounds) were investigated. Investigated pressure range was from 100 to 300 bar, while investigated temperatures were 40, 50 and 60°C. The highest extraction yield was obtained by carbon dioxide at pressure of 300 bar and temperature of 60°C (1.879%). Linalool, eugenol and δ-cadinene were indentified as three main compounds of this way prepared extracts. Dominant compound in all investigated supercritical basil extracts was linalool. The highest content of linalool (15.11 g/100 g) was determined in extract obtained using carbon dioxide at pressure of 200 bar and at temperature of 40°C. In basil extracts eugenol and δ-cadinene were present in the range from 3.74 to 9.87 g/100 g, and 3.20 to 7.21 g/100 g, respectively. Within the experimental range extraction parameters had significant influence on the extraction yield. According to the obtained results for the oil, cadinene and linalool the Gordillo et al. model show the best agreement for obtained experimental datas, therefore the solubility of oil, linalool and cadinene in supercritical carbon dioxide at investigated temperatures is shown as a function of pressure.

Ocimum basilicum L.; supercritical carbon dioxide extraction; linalool; eugenol; mathematical modelling

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