20.500.12556/DKUM-27553 Isolation and concentration of natural antioxidants with high-pressure extraction In present work, the purification of crude rosemary extract with supercritical fluids is presented. Carbon dioxide was used as a solvent. The crude extract was prepared from rosemary with conventional extraction process. The supercritical CO2 extraction of crude extracts was performed at pressures 10 and 20 MPa and temperatures 35 and 60 °C. The best results were obtained at pressure 10 MPa and temperature 35 °C. The content of carnosic acid in the samples before and after high pressure extraction was identified by high performance liquid chromatography. The content of carnosic acid in purified extract is higher compared to crude extract. The antioxidative efficiency of extracts was determined by measuring peroxide value. Activity ofpurified rosemary extracts is higher compared to crude extracts. chemical processing high pressure technology extraction CO2 natural antioxidants rosemary extract food additives kemijska procesna tehnika visokotlačna tehnologija ekstrakcija CO2 naravni antioksidanti ekstrakt rožmarina živilski aditivi true false false Angleški jezik Angleški jezik Neznano 2012-06-01 11:38:07 2012-06-01 11:38:07 2022-04-15 03:45:12 2019-07-10 12:19:05 2004 0 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 66.061-987 9235478 1466-8564 URN:SI:UM:DK:Q4QHC6MR http://dx.doi.org/10.1016/j.ifset.2003.12.002 1 https://dk.um.si/Dokument.php?lang=slv&id=36855 Fakulteta za kemijo in kemijsko tehnologijo 0 0 0