24 KB156 KB19 KB199820252010Bezjak, MiranKnez, ŽeljkoMakovšek, KatjaŠkerget, Mojcaštevilka:1letnik:57str. 60-65ISSN:1318-0207COBISSID:14011158URN:URN:NBN:SI:doc-BQ1KSPVPenSlovenian Chemical SocietySlovensko kemijsko društvoActa chimica slovenicaekstrakcijaestriluteinTagetes errectaExtraction of lutein diesters from Tagetes erecta using supercritical COspodaj2 and liquid propane|The efficiency of high pressure extraction of lutein diesters from marigold (Tagetes erecta) flower petals has been investigated. The solvents used for extraction were supercritical carbon dioxide and liquid propane. Operating parameters were 300 bar and 40, 60 and 80 °C for CO2 and 100, 150, 200 bar and 40 and 60 °C for propane, respectively. The influence of process parameterson the total yield of extraction and content of lutein diesters in the extracts was investigated. The results show, that solvent power of propanefor lutein diesters is approximately 3.5 times higher than of CO2. The calculation procedure based on the Fickćs second law was applied to determine the diffusivities of lutein diesters during extraction from marigold flower petals for both extraction stages: a constant rate stage followed by a stage of decreasing rate. The mathematical model based on the Fickćs second law well described the experimental extraction resultsTEXTznanstveno časopisjejournalsSlovenian National E-content AggregatorNational and University Library of SloveniaSlovensko kemijsko društvo