甘薯膳食纤维不同提取工艺的比较研究

目的]比较几种不同工艺对甘薯膳食纤维的提取效果。方法]试验采用筛法、酶法及酶碱法提取甘薯膳食纤维,优化并比较这3种提取工艺的提取效果。结果]酶法提取甘薯膳食纤维的提取率最高,能达到薯渣质量的38%。对所得膳食纤维的特性进行了研究比较,结果显示,酶法工艺得到的膳食纤维的持水性、吸油性及膨胀性均较好。结论]酶法适宜于甘薯膳食纤维的提取。

Comparative Study on the Extraction Process of Dietary Fiber from Sweet Potato

Objective] To compare the extraction results of several different methods.Method] The dietary fiber was extracted from sweet potato respectively by the sieve method,the enzymatic process and enzyme-alkali method.The extraction results of the three methods were optimized and compared.Result] The extraction rate of dietary fiber by enzymatic method was the highest,which could reach 38% of total potato residue.The properties of dietary fiber extracted by the three methods were compared,the results indicated that the dietary fiber extracted by enzymatic method had good water-holding capacity,soil absorption and expansion.Conclusion] The enzymatic method is the best for extracting dietary fiber from sweet potato.