Influence on the quality of essential lemon (Citrus aurantifolia) oil by distillation process

The essential oil of key time (Citrus aurantifolia) was obtained by steam distillation at normal conditions (1.0 bar/25 degrees C) with steam at 110 degrees C, during 10h. The GC analysis identified about 10 main substances, being limonene, p-cymene, myrcene and beta-bisabolene the most significant compounds. Aldehyde content increased significantly during distillation time (upper phase). After 10h of process, oil has presented more than 3% of aldehydes content due to oxidative reactions.23114715

Solubility of triacylglycerols in supercritical carbon dioxide

The solubility of refined corn and sunflower seed oils, babassu (Attalea funifera) and ucuuba (Virola sebifera) fats in supercritical carbon dioxide (SC-CO2) were measured in a temperature range from 40 to 80 degrees C and pressure between 200 and 350 bar. Under working conditions, the values Of Solubility showed retrograde behavior. Experimental SC-CO2 solubility data were collected from the literature for the following systems: tricaprylin (CCC), trilaurin (LLL), trimyristin (MMM), tripalmitin (PPP), tristearin (SSS), triolein (OOO), blackcurrant seed oil and canola seed oil, and analyzed together with the values obtained in this work. Chrastil's equation was used to correlate the solubility of oils in CO, as a function of the temperature and density of the SC-CO2. An analysis of the results showed that the parameters of Chrastil's equation could be correlated to the fatty acid composition of the triacylglycerols. (C) 2007 Published by Elsevier B.V.431253