花生壳水溶性膳食纤维微波辅助提取工艺及其性质研究

Study on Microwave-Assisted Extraction Technology and Properties of Water-Soluble Dietary Fiber from Peanut Hulls

对微波辅助提取花生壳水溶性膳食纤维(SDF)的工艺及其性质进行研究,探讨了料液比、柠檬酸质量分数、微波功率、微波时间对SDF得率的影响。在单因素试验基础上,通过L9(34)正交试验确定最佳提取工艺。方差分析结果表明:料液比、柠檬酸浓度、微波功率、微波时间对SDF得率有极显著影响。花生壳SDF提取的最佳工艺为:柠檬酸质量分数为5%、料液比为1∶20、微波功率为320 W、处理时间为30 s,此时花生壳水溶性膳食纤维的得率为17.25%。所得SDF具有良好的持水性、溶胀性、结合水力和一定的阳离子交换能力,是一种优质膳食纤维。

The process and feature for the microwave-assisted extraction of water soluble dietary fiber（SDF） from peanut hulls were studied to make a study of the effects of the microwave output power,the microwave-assisted extraction irradiation time,material-solvent ratio and citric acid concentration on the rate of SDF gaining.On the basis of the single factor test,the optimum conditions of extraction were obtained through orthogonal test as follows：microwave output power 320 w,microwave-assisted extraction irradiation time 30 s,ratios of solvent to material 1g∶20 mL,and citric acid concentration 5%.The yield of SDF was 17.25%.SDF from peanut hulls was a superior dietary fiber with high capacities of water holding,swelling,water binding capacity as well as cation-exchange capacity.