- Balıkesir Üniversitesi Fen Bilimleri Enstitüsü Dergisi
- Vol: 4 Issue: 2
- Extraction of Stinging Nettle (Urtica dioica L.) with Supercritical Carbondioxide
Extraction of Stinging Nettle (Urtica dioica L.) with Supercritical Carbondioxide
Authors : V. Rafajlovska, Z. Djarmati, V. Najdenova, Lj. Cvetkov
Pages : 49-52
View : 11 | Download : 5
Publication Date : 2002-12-01
Article Type : Research
Abstract :The extraction of the stinging nettle leaves was performed with 20 kg/h flow rate of supercritical CO2. The influence of the working parameters: pressure (140 bar, 210 bar and 350 bar), temperature (from 40 oC to 60 oC) on the quantity of extract and contents of chlorophyll a+b and β-carotene in it is determined. The biggest quantity of extract (4.48% in relation to the dry matter) with 0.88% contents of chlorophyll a+b and 0.50% β-carotene is obtained at 350 bar, 60 oC, 6h extraction timeKeywords : stinging nettle, supercritical CO2, chlorophyll, β-carotene, yield of extract