以梵净山野生阳荷作为实验材料,应用酸碱结合法制备阳荷水不溶性膳食纤维。采用L9(34)正交表进行实验设计,考察料液比、碱浓度、浸提温度、提取时间对水不溶性膳食纤维提取率的影响,优化水不溶性膳食纤维的提取条件,得出水不溶性膳食纤维的佳提取工艺为:料液比1∶45、碱浓度0.25 mol/L、浸提温度52℃、提取时间100 min,在此优化条件下,IDF的提取率为90.73%,提取得到的IDF溶胀度为8.6 mL/g。持水力为2.315 g/g。研究结果表明,梵净山野生阳荷是提取水不溶性膳食纤维的良好原料。

The extraction technolgy of insoluble dietary fiber from wild Zingiber strioatum by alkali solution was investigated,The effects of ratio between material and solution,concentration of alkali,temperature and time on the extraction ratio were studied.The optimal extractions conditions were obtained by L 9(34) orthogonal methodology.Optimization of water insoluble dietary fiber extraction conditions: it was concluded that water insoluble dietary fiber of the best extraction technology for: feed liquid than 1∶45,alkali concentration 0.25 mol/L,leaching temperature 52 ℃,extracting time 100 min,under optimized conditions,the extraction rate of water-insoluble dietary fiber was 90.73%,swelling ratio of insoluble dietary fiber was 8.6 mL/g and its holding water capacity was 2.315g/g.It was proved the wild Zingiber strioatum of fanjing mountain was a good material to extract dietary fiber.