Ethanol Extraction of Flavonoids from Mungbean Skin after Twin-Screw Extrusion Process

Abstract:

In order to increase the extraction rate of flavonoids from mungbean skin, twin-screw extrusion process was used as a pretreatment method. After optimizing conditions of twin-screw extrusion process, effects on ethanol extracting flavonoids were studied. Results revealed that the best extrusion conditions were: screw speed at 268r/min, extrusion temperature at 115~120°C, feed moisture at 17% and feeding rate at 726g/min. Under these conditions, the optimum condition for ethanol extraction of flavonoids was: using 38% ethanol solution at a material-liquid ratio of 1:20 at 77.5 °C with 2.5 h. The average extraction rate of flavonoids from mungbean skin was 3.14%, comparing to rate of un-extruded material 2.07%, extraction rate raised by 51.5%. This pretreatment can destroy the density structure of mungbean skin which has great effect on the increase of extraction rate of flavonoids.

• Periodical: Advanced Materials Research (Volumes 393-395)
• Pages: 1203-1211
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.393-395.1203
• Online since: November 2011
• Authors: Bing Du, Yan Li Jiao, Zhi Qiang Huang, Lian Kai Mao, Yuan Yuan Fan, Hai Xiong Wu, Long Bo Jiang, Gong Ming Yang
• Keywords: Flavonoid, Mungbean Skin, Response Surface Methodology (RSM), Twin-Screw Extrusion

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