METHOD FOR SUPERCRITICAL EXTRACTION OF CHARACTERISTIC FRAGRANT SUBSTANCES IN DIFFERENT FRAGRANT TOBACCO LEAVES

摘要

A supercritical extraction of characteristic fragrant substances in different fragrant tobacco leaves, which involves the following steps: 1) cutting the tobacco leaves into shreds and placing the shreds into an extraction vessel with supercritical CO₂ fluid; 2) setting the extraction pressure and extraction temperature of supercritical CO₂ fluid about 100 to 350 bar and 35 to 70° C., extracting statically the tobacco shreds for 10 to 35 minutes in the condition, then setting the dynamic extracting speed of the supercritical CO₂ fluid about 1.0 to 3.5 L/min, and extracting dynamically the tobacco shreds for 5 to 15 minutes; 3) collecting the obtained supercritical CO₂ fluid extract, and obtaining the key fragrant substances, which act as the determinants for tobacco fragrance, after completely volatilizing CO₂.