福建农业学报 ›› 2008, Vol. ›› Issue (3): 327-330.

• 测试技术 • 上一篇    下一篇

发酵鱼粉中寡肽检测技术研究

罗钦, 陈人弼, 宋永康   

  1. 福建省农业科学院中心实验室, 福建, 福州, 350003
  • 收稿日期:2008-05-02 修回日期:2008-08-28 出版日期:2008-07-15 发布日期:2008-07-15
  • 基金资助:
    福建省农科院青年科技人才创新基金项目(2006)

Determination of oligopeptide content in fermented fishmeal

LUO Qin, CHEN Ren-bi, SONG Yong-kang   

  1. Central Laboratory, Fujian Academy of Agricultural Sciences, Provincial keylab, Fuzhou, Fujian 350003, China
  • Received:2008-05-02 Revised:2008-08-28 Online:2008-07-15 Published:2008-07-15

摘要: 用单宁酸作为发酵鱼粉中水溶性蛋白质的沉淀剂,经飞行时间质谱仪测得滤液中蛋白质分子量在2 047.98 Da以下。用双缩脲反应法可以测出发酵鱼粉中水溶性总肽的含量,用凯氏定氮法可以测出被沉淀的多肽的含量,从而可以计算出发酵鱼粉中寡肽的含量。用该技术测得2 546 Da和1 500 Da的低分子量蛋白的回收率分别为92.42%和5.91%。

关键词: 寡肽, 单宁, 双缩脲反应法, 凯氏定氮法, 检测技术

Abstract: Tannic acid was used to precipitate soluble proteins in fermented fishmeal.Applying a time-of-flight mass spectrometer,the molecular weight of the protein in the filtrate was found to be lower than 2047.98Da.Total solvable peptide content in the fermented fishmeal was determined by using the biuret method,and polypeptide in the precipitate by using Kjeldahl method.Then,the oligopeptide content was calculated.This determination method showed recovery rates for the 2546 Da and 1500 Da low molecular weight proteins to be 92.42% and 5.91%,respectively.

Key words: Oligopeptides, tannin, biuret method, Kjeldahl method, determination methodology

中图分类号: 

  • S963