METHOD FOR EXTRACTING OIL ENRICHED WITH TANNINS FROM CLOUDBERRY SEEDS

Cloudberry is a unique berry that has not only a special taste, but also beneficial properties, including due to the presence of vitamins B, PP and E and other valuable components. Cloudberry berries are widely used in the food industry. However, cloudberry seeds are mostly disposed nowadays; meanwhile they also contain a large number of useful components. These components include tannins, a unique group of phenolic metabolites. They are useful both for external treatment of inflammation and skin damage, and for use in the prevention of chronic diseases. Extraction of substances can be achieved by supercritical fluid extraction - a modern method of extracting oil from plant raw materials with supercritical carbon dioxide, which was carried out on an MV-10ASFE installation manufactured by Waters, (USA), at a temperature of 60 and 80 °C, a pressure of 200 and 300 atm and the addition of 10% co-solvent. In this case, we varied conditions, such as pressure, temperature and the addition of a cosolvent. Since cloudberry seeds have a small amount of tannins, raw materials can be selected to create a mixture in order to increase the content of the amount of tannins. Fireweed and oak bark were selected for such purposes. Tannins were determined spectrophotometrically and by pyrolytic gas chromatography-mass spectrometry. It has been established that the greatest amount of tannins is observed in fireweed extracts, and under the same conditions, cloudberry extract contains almost three times less tannins.