食品科学

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凝胶过滤色谱法测定3 种不同来源多肽的相对分子质量分布

蒋腾川1,宋新波1,2,*,张丽娟1   

  1. 1.天津中医药大学研究生院,天津 300193;2.天津中一制药有限公司,天津 300193
  • 出版日期:2014-12-25 发布日期:2014-12-29
  • 通讯作者: 宋新波

Determination of Relative Molecular Weight Distribution of Polypeptides from Three Different Sources by Gel Filtration Chromatography

JIANG Teng-chuan1, SONG Xin-bo1,2,*, ZHANG Li-juan1   

  1. 1. Graduate School, Tianjin University of Traditional Chinese Medicine, Tianjin 300193, China;
    2. Tianjin Zhongyi Pharmaceutical Co. Ltd., Tianjin 300193, China
  • Online:2014-12-25 Published:2014-12-29
  • Contact: SONG Xin-bo

摘要:

目的:建立凝胶过滤色谱法测定多肽(如大豆肽、白蛋白多肽、羊胎盘多肽)的相对分子质量分布的方法。方法:采用TSK-GEL G2000SWXL色谱柱(300 mm×7.8 mm,5 μm)、流动相为乙腈-水-三氟乙酸(15∶85∶0.07,V/V)、流速0.6 mL/min、柱温30 ℃、进样体积10 μL、检测波长220 nm。结果:在相对分子质量189.1~12 355之间,相对分子质量对数与保留时间呈线性关系,相关系数为0.995 6,方法精密度、重复性、稳定性良好,准确度高。结论:本方法操作简便快速、灵敏度高、重复性好,适用于多肽类物质相对分子质量分布的检测。

关键词: 凝胶过滤色谱法, 大豆, 白蛋白, 羊胎盘, 多肽, 相对分子质量

Abstract:

Objective: To establish a method to determine the relative molecular weight distribution of soy peptide, albumin
polypeptide and sheep placenta polypeptide using gel filtration chromatography (GFC). Methods: TSK-GEL G2000SWXL
(300 mm × 7.8 mm, 5 μm) column was equilibrated with a mobile phase composed of acetonitrile-water-trifluoroacetic acid
(15:85:0.07, V/V) at a flow rate of 0.6 mL/min. The column temperature was 30 ℃ and the injection volume was 10 μL.
The detection wavelength was 220 nm. Results: A linear relationship between the logarithm of relative molecular weight and
retention time was achieved in the relative molecular weight range of 189.1–12 355 with a correlation coefficient of 0.995 6.
The precision, repeatability, stability and accuracy of the GFC method were good. Conclusion: This method is simple, rapid,
sensitive, and reproducible for the determination of the relative molecular weight distribution of polypeptides.

Key words: gel filtration chromatography, soybean, albumin, sheep placenta, polypeptides, relative molecular weight

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