苹果果肉中水不溶性膳食纤维的提取工艺研究

目的]优化提取苹果中水不溶性膳食纤维的工艺。方法]采用碱浸法提取苹果果肉中水不溶性膳食纤维,通过正交试验确定了碱浸法的最佳提取工艺条件。结果]影响碱浸法提取苹果果肉中水不溶性膳食纤维的各因素主次关系为料液比碱液浓度温度浸提时间,最佳提取工艺是A3B1C2D2,即料液比为1∶11 g/ml、碱液浓度为0.25 mol/L、温度50℃、时间2.0 h,此条件下产率为35.46%。结论]苹果果肉中含有较多的膳食纤维,从苹果中提取水不溶性膳食纤维市场开发意义较大。

Study on Extraction of Insoluble Dietary Fiber from Apple Pulp

Objective] To optimize the extraction conditions of insoluble dietary fiber from apple pulp.Method] The insoluble dietary fiber was extracted from the apple pulp by alkaline,and the optimal extraction conditions were determined by orthogonal experiment.Result] The influential order of each factor on the extraction of insoluble fiber decreased in the order of solid-liquid ratio> alkali concentration> temperature> extraction time,and the optimal extraction technology was A3B1C2D2,that is,1∶11 g/ml of solid-liquid ratio,0.25 mol/L alkaline concentration,50 ℃ of extraction temperature and 2 h extraction time,under these conditions,the yield of insoluble dietary fiber was 35.45%.Conclusion] The apple pulp contains rich dietary fiber,and the insoluble dietary fiber extracted from the apple pulp has great development value.