SOLID-LIQUID EXTRACTION OF BETEL LEAVES (PIPER BETLE L.)

摘要

This work investigated the effects of extraction temperature on the qualitynof extract and the kinetics of solid-liquid extraction of betel leaves. In thisnstudy, the effects of extraction temperature on the quality of extract werenevaluated by comparing the concentration of its active compounds, includingnhydroxychavicol (HC) and eugenol (EU). The results indicate that the increasenof extraction temperature led to the increase of the concentration of HC. EUnconcentration was decreased when temperatures higher than 60C were used.nThe kinetics data show that the extraction process reached equilibrium in anshort time – about 40 min. Two models, namely equilibrium-dependent solidliquidnextraction (EDSLE) model and diffusion-dependent solid-liquid extractionnmodel were applied to describe the extraction process. By comparing thenvalues of correlation coefficients, the EDSLE model was found to be morensuitable in describing the extraction process as it provided a better fit to thenexperimental data.