Supercritical CO2 extraction of tomato seed oil

摘要

Supercritical CO2 extraction (SC-CO2) of oil from tomato seeds was carriedout at varied extracting temperature, pressures, and time through single-factor, orthogonaland optimal experiments. The extracted oil was analyzed for the extracting yield, the fattyacid composition and the quality. The results showed that the order of the effects of thefactors on the extracting yield were: extraction time > pressure > temperature. The optimumextracting conditions obtained were 30MPa for 2h at 50°C, which resulted in a yield of96.34%. Determined by gas chromatography (GC), the fatty acid compositions and theircontents in tomato seed oil after SC-CO2 extraction were: C16:0, 13%; C18:0, 5.0%; C18:1,22%; C18:2, 56%; and C20:0, 2.8%. Demonstrated by POV, A.V., S.V. and I.V., thequalities of the tomato seed oil extracted by SC-CO2 were good as well. No significanteffect of various extracting conditions was shown on such qualities of tomato seed oil.