Animal Husbandry and Feed Science ›› 2021, Vol. 42 ›› Issue (1): 45-50.doi: 10.12160/j.issn.1672-5190.2021.01.009

• Animal Nutrition and Feed Science • Previous Articles     Next Articles

Research Progress in Determination Techniques of Tryptophan in Feed

SONG Jie1, 2, WANG Li-fang1, YAO Yi-ping1, SHI pei1, ZHANG San-fen1, ZHONG Hua-chen1, GUO Chen-yang1   

  1. 1.Laboratory of Quality and Safety Risk Assessment for Agricultural Products(Hohhot),Ministry of Agriculture and Rural Affairs,Inner Mongolia Academy of Agricultural and Animal Husbandry Sciences,Hohhot 010031,China;
    2.Inner Mongolia Key Laboratory of Animal Nutrition and Feed Science,College of Animal Science,Inner Mongolia Agricultural University,Hohhot 010018,China
  • Received:2020-09-08 Published:2021-02-18

Abstract: Tryptophan is an aromatic amino acid which is essential for the maintenance of physiological functions such as feed intake, growth and immunity as well as for protein synthesis. Tryptophan has become the main limiting amino acid in feed due to the large use of synthetic methionine and lysine in formulated feed. Accurate determination of tryptophan is very important for dietary protein balance. This paper reviews the analytical methods of tryptophan in recent years, including ultraviolet or fluorescence spectrophotometer, near infrared spectroscopy, amino acid analyzer, high performance liquid chromatography, gas chromatography-mass spectrometry, capillary electrophoresis and other methods, in hoping to provide reference for nutritional value evaluation and quality control of feed.

Key words: feed, tryptophan, analytical methods

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