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《广西农业大学学报》 1994-02
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A STUDY ON THE METHODS OF TRYPTOPHAN DETERMINATION BY ANINO MID ANALYZER

Zheng Bixing;Zhou Yun(Laboratory Centre,Guangxi Agric.Univ.,Nanning 530005)  
A comparative study on the effect of protein tryptophan determination with different hydrolysitic reagents and hydrolysitic conditions has been conducted. The best method is 4mol/L LiOH 110℃ 20h, the second is 5mol/L LiOH+5%SnC12,110℃ 20h. 6mol/L LiOH 120℃6h was found in further study, which can shorten hydrolysis time,the recov ery rate is equal to 4mol/L LiOH or a litte better.Nitrogen gas must be filled in hydrolysis tube.The method of directly eliminating ammonia has a good effect on getting rid of ammonia's distortion on tryptophan measured.The trial about the neutral condition and the stored condition of sample hydrolysate had been made.The reformed short program save 2/3 ninhydrin reagent.
【CateGory Index】: O657.7
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1 YANG Jing-ting;YANG Su-wen;JIN Wei-dong;LIU Lei;YAN Yu-hong;MAO Qi-di;School of Resources Environment and Chemical Engineering, Nanchang University;State Key Laboratory of Environmental Criteria and Risk Assessment;State Engineering Laboratory for Lake Pollution Control and Ecological Rehabilitating Technique;;EOM characteristics and release of extracellular amino acids in three typical freshwater algaes[J];中国环境科学;2017-05
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