赤豆皮中膳食纤维的提取工艺研究

Study of Extracting Technology on Dietary Fiber from Peel of Red Bean

通过4因素(提取温度、提取时间、液固比、碱液浓度)3水平的试验提取赤豆皮中的膳食纤维,以提取率为考察指标确定最佳工艺参数。结果表明:膳食纤维最佳提取工艺参数为:提取温度55℃,提取时间9 h,液固比6,碱溶液浓度1.5%,以此获得的提取率最高,为51%;此外,最佳粉碎粒度的单因素试验表明,赤豆皮最佳粉碎粒度1.0～1.5 mm时,膳食纤维提取率最高,为53.5%。

Extracting dietary fiber from the peel of red bean by orthogonal test,formed by 4 factors（extracting temperature,extrachting time,liquid to material ratio,concentration of lye）and 3 levels,making the ratio of diefary fiber as inspection farget to determine the optimal technical parameters.The results showed that the best extracting parameters of dietary fiber was：extracting temperature of 55 ℃,extracting time of 9 h,liquid to material ratio of 6,concentration of NaOH 1.5%,the ratio of dietary fiber was the highest,51%;in addition,single test of the best grinding particle showed that when grinding particle size of peel of red bean was 1.0～1.5 mm,the ratio of dietary fiber was the highest,it was 53.5%.