Optimization of Extraction of Total Phenolic and Total Flavonoid from Seeds of Alpinia blepharocalyx K. Schum. Using The Response Surface Methodology
Keywords:Alpinia blepharocalyx, total phenolic content (TPC), total flavonoid content (TFC), response surface methodology (RSM), extraction.
AbstractSeeds of Alpinia blepharocalyx contain high amounts of phenolic and flavonoid compounds with potential antioxidant properties. In this study, the effects of the extraction method on the recovery of phenolic and flavonoid compounds from Alpinia blepharocalyx seeds were investigated. Response surface methodology (RSM) has been used to optimize the extraction conditions of total phenolic and total flavonoid from seeds of Alpinia blepharocalyx. A Box-Behnken design was used to investigate the effects of four independent variables, namely extraction temperature (°C), extraction time (min), (v/m) and ethanol concentration (%) on the responses: total phenolic content (TPC) and yield. The optimal conditions obtained from response RSM were 52.66 % v/v for the solvent composition, 62.34 (°C) for extraction temperature, 34.48/1 (ml/g) for solvent/material ratio and 125.42 (min) for extraction time. The experimental values of TPC, TFC and yield were 39.31±0.05 mgGAE/g, 12.75±0.07 mgCE/g and 6.97±0.05%, respectively.
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