Supercritical CO2 with/without ethanol extraction of buttermilk was carried out at 50°C and various pressure and ethanol concentration conditions. Extracts were analyzed by TLC-FID and found to be mainly composed of triglycerides, obtained from both CO2 and CO2 with ethanol extractions, and polar lipids such phosphatidylcholine and sphingomyelin, obtained only from CO2 with ethanol extraction. A dynamic extraction model was applied to the obtained data and could describe extraction curves of solutes in the buttermilk. Solubility of triglycerides in supercritical CO2 obtained in this work was almost coincident with values in the literature. Although the solubilities of both phosphatidyl choline and sphingomyelin were not available in the literature because of the highly variable components, they could be estimated by applying the extraction model to the obtained extraction results.
- Kinetic model
- Polar lipids
- Supercritical fluid extraction
ASJC Scopus subject areas
- Food Science