以荞麦皮粉为原料，采用碱法提取膳食纤维，通过单因素及正交试验得出最佳提取工艺条件，并对所得膳食纤维进行性质测定。结果表明，最佳提取工艺条件为：碱解温度80 ℃，氢氧化钠质量分数1.0 %，料液比1:16（g/mL），碱解时间80 min。在此条件下膳食纤维得率为20.39 %，水不溶性膳食纤维持水力为5.97 g/g，膨胀力为7.4 mL/g，水溶性膳食纤维溶解率为96%。

Dietary fiber was extracted from buckwheat brans by alkaline hydrolysis method. The optimum extraction condition was found by single-factor and orthogonal experiment, and the properties of dietary fiber were also studied. The results showed that the optimum extraction condition was as follows: the temperature of alkaline hydrolysis 80 ℃, the concentration of NaOH 1.0%, the ratio of material to solution 1:16 (g/mL), and the time of alkaline hydrolysis 80 min. Under these conditions, the yield of dietary fiber was 20.39%. The water holding capacity of insoluble dietary fiber, swelling capacity, and solubility of soluble dietary fiber were 5.97 g/g, 7.4 mL/g and 96%, respectively.

陕西省教育厅专项科研计划项目（09JK365）；陕西省科学技术研究发展计划项目（2012K02-14）