食品科学 ›› 2008, Vol. 29 ›› Issue (12): 278-282.

• 工艺技术 • 上一篇    下一篇

酪蛋白糖巨肽超滤分离的工艺优化研究

 马岚, 葛克山, 任发政, 毛学英   

  1. 中国农业大学食品科学与营养工程学院功能乳品重点实验室;
  • 出版日期:2008-12-15 发布日期:2011-12-08

Study on Optimization of Ultrafiltration Separation Conditions of Casein Glycomacropeptids from Whey Protein Concentrate

 MA  Lan, GE  Ke-Shan, REN  Fa-Zheng, MAO  Xue-Ying   

  1. Key Laboratory of Functional Dairy,College of Food Science and Nutritional Engineering, China Agricultural University,Beijing 100083,China
  • Online:2008-12-15 Published:2011-12-08

摘要: 目的:研究超滤分离酪蛋白糖巨肽的最优工艺参数,以达到最佳超滤通量性能。方法:采用超滤方法分离乳清浓缩蛋白(WPC80)中的酪蛋白糖巨肽,研究料液pH值、操作压力和温度等对膜渗透通量的影响。利用SDS-PAGE凝胶电泳技术分析超滤截留液的相对分子量分布。结果:实验表明溶液pH7.0、操作压力0.3MPa、温度45℃时膜渗透通量最高,超滤酪蛋白糖巨肽的截留率达到97.54%,产物纯度达到92.45%,经SDS-PAGE凝胶电泳测定,酪蛋白糖巨肽的平均分子量68.86%为30.47ku,31.14%为19.22ku。结论:超滤技术是将酪蛋白糖巨肽与其他乳清蛋白分离的有效方法。

关键词: 酪蛋白糖巨肽, 超滤技术, 分离

Abstract: Objective:To optimize the ultrafiltraton seperation conditions of casein glycomacropeptides(CGMP) from whey protein concentrate(WPC 80) ,in order to attain the highest permeate flux. Methods:The effects of solution pH value,pressure and temperature on ultrafiltration permeate flux were investigated. The relative molecular weight of retentates was determined by SDS-PAGE gel electrophoresis technology. Results:The optimal ultrafiltration conditions are:pH 7.0,pressure 0.3 MPa and temperature 45 ℃. The separated CGMP purity is 92.45% and their relative molecular weights are 30.47 ku of 68.86% and 19.22 ku of 31.14%. Conclusion:Ultrafiltration is an efficient technique to separate CGMP from whey protein concentrate.

Key words: casein glycomacropeptides, ultrafiltration, separation