Extraction yield (g of extract/g of tea), caffeine concentration (g of caffeine/g of extract), caffeine yield (mg of caffeine/g of tea) and caffeine recovery (g of caffeine extracted/g of caffeine in tea) in the static and dynamic SFE of green tea leaves using pure CO2, CO2 + EL, CO2 + ETOH and CO2 + EAC. Extraction conditions: 30 MPa and 343K.