title: Recovery of pigments from Origanum majorana L. by extraction with supercritical carbon dioxide.
abstract: Extraction of pigments (chlorophylls and carotenoids) from marjoram (Origanum majorana L.) with supercritical carbon dioxide was investigated. The aim of this study was to map the effects of extraction pressure and temperature on the yield of coloring materials by applying a 3(2) full factorial design with three repeated tests in the center of the design. For comparison, laboratory and pilot plant Soxhlet extractions were carried out using ethanol and n-hexane solvents. The compositions of pigments in marjoram extracts were determined by HPLC. Similar amounts of carotenoids, in addition to 40% of chlorophylls and their derivatives, were recovered from the supercritical fluid extraction, in comparison to the ethanol Soxhlet extraction.
authors.affiliation: Department of Chemical Engineering, Budapest University of Technology and Economics, 1521 Budapest, Hungary.
authors.forename: E
authors.initials: E
authors.lastname: Vági
authors.forename: B
authors.initials: B
authors.lastname: Simándi
authors.forename: H G
authors.initials: HG
authors.lastname: Daood
authors.forename: A
authors.initials: A
authors.lastname: Deák
authors.forename: J
authors.initials: J
authors.lastname: Sawinsky
mesh_terms: D002245:Carbon Dioxide; D002338:Carotenoids / Q000032:analysis / Q000302:isolation & purification; D002734:Chlorophyll / Q000032:analysis / Q000302:isolation & purification; D002851:Chromatography, High Pressure Liquid; D025924:Chromatography, Supercritical Fluid; D019686:Lamiaceae / Q000737:chemistry*; D010860:Pigments, Biological / Q000032:analysis / Q000302:isolation & purification*
chemical_list: D010860:Pigments, Biological; D002734:Chlorophyll; D002245:Carbon Dioxide; D002338:Carotenoids