cosolvent near the critical point will lead great changes in the solvent density and vapourpressure of solutes, resulting in changes in the solvation power of the solvent. Although an isobaric increase in the temperature decreases the density of the solvent, it increases the vapour pressure of caffeine (Kopcak and Mohamed, 2005). Increase in temperature decreases SCCO density and enhance the movement of the solutes and delivery medium (Kuppers, 1992). The sublimation temperature of caffeine is low (178°C) while catechins such as EGCG are not
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