食品科学 ›› 2009, Vol. 30 ›› Issue (24): 376-380.doi: 10.7506/spkx1002-6630-200924086

• 分析检测 • 上一篇    下一篇

RP-HPLC 法对乳制品中主要牛奶蛋白的分离及定量测定

王 浩1,张志国2,常彦忠1,段相林1,赵述强1,张 楠1,石振华1 ,*   

  1. 1.河北师范大学生命科学学院 2.河北省乳业工程技术研究中心
  • 收稿日期:2009-01-15 出版日期:2009-12-15 发布日期:2010-12-29
  • 通讯作者: 石振华 E-mail:shizhhtom@126.com

Isolation and Quantification of Main Milk Proteins in Dairy Products with Reverse-phase HPLC

WANG Hao1,ZHANG Zhi-guo2,CHANG Yan-zhong1,DUAN Xiang-lin1,ZHAO Shu-qiang1,
ZHANG Nan1,SHI Zhen-hua1,*   

  1. 1. College of Life Science, Hebei Normal University, Shijiazhuang 050016, China;
    2. Research Center of Hebei Province Dairy Engineering and Technology, Shijiazhuang 050071, China
  • Received:2009-01-15 Online:2009-12-15 Published:2010-12-29
  • Contact: SHI Zhen-hua1,* E-mail:shizhhtom@126.com

摘要:

建立一种基于反相高效液相色谱(RP-HPLC)的分析方法,对牛奶及其乳制品进行定量分析。此方法可一次分离牛奶及乳制品中的7 种主要蛋白成分(κ-CN、αs 2-CN、αs1-CN、β-CN、α-La、β-LgB、β-LgA),解决了加工后乳制品中变性蛋白定量不准确的问题和κ-CN、αs2-CN 以及乳清蛋白中α-La、β-LgB 和β-LgA 难以分离的困难。各组分分离度均大于1,达到基线分离,回收率达88.9%~97.1%,相对标准偏差为0.8%~5.1%。该方法不需对样品进行离心,在测定清蛋白组分时,也不需提前去除优势蛋白酪蛋白,与传统的检测方法相比,具有准确、灵敏和快速等特点,可用于牛奶及其乳制品的质量控制和定量检测。

关键词: 反相高效液相色谱(RP-HPLC), 定量分析, 牛奶, 奶粉

Abstract:

Totally seven main proteins (κ-CN, αs2-CN, αs1-CN, β-CN, α-La, β-LgB, β-LgA) in milk and dairy products were simultaneously determined with reverse-phase HPLC method. This method successfully solved the most concerned problems in traditional methods such as inaccurate quantitative analysis of degradative protein in processed dairy products and the difficulty of separatingκ-CN and αs2-CN, as well as α-La, β-LgB and β-LgA in whey protein. The chromatographic resolution of each component is more than 1. and baseline separation was achieved. The recovery rate was about 88.9%- 97.1% and the value of relative standard deviation (RSD) was 0.8%-5.1%. In addition, the sample centrifuging process and the casein removal step in albumin analysis were not needed any more. Compared with previous methods, the method was sensitive, accurate and rapid and could be used for quality control and quantitative analysis of milk or dairy products.

Key words: reversed phase-high performance liquid chromatography (RP-HPLC), quantitative analysis, milk, milk powder

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