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To remove caffeine from green tea, supercritical CO 2 (SC-CO 2 ) extraction using 95% (v/v) ethanol as a modifier was carried out on a laboratory scale in the ranges of 150–300bar and 50–80°C. The extraction yield of caffeine and catechins including epigallocatechin gallate (EGCG) increased with an increase in temperature at a constant pressure, and also increased with increasing pressure...
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