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Citation: Liu Shi-Jun, Wang Cun-Xin, Wu Xu-Heng, Qu Song-Sheng. The Determination of the Thermodynamic Functions of Protonation Reactions of Eight Kinds of Amino Acids by Titration Calorimetry[J]. Acta Physico-Chimica Sinica, ;1995, 11(07): 617-621. doi: 10.3866/PKU.WHXB19950710 shu

The Determination of the Thermodynamic Functions of Protonation Reactions of Eight Kinds of Amino Acids by Titration Calorimetry

1.
Department of Chemistry,Wuhan University,Wuhan 430072

Received Date: 5 May 1994
Available Online: 15 July 1995

The protonation reaction of eight kinds of amino acids-glycine, L-alanine, L-leucine, L-isoleucine, L-valine, L-phenylalanine, L-methionine, and L-tryptophan-at 298.15K and ionic strength I=0.1 (0.1 mol•dm-3 KNO3), have been studied by titration calorimetry. The thermodynamic functions of the protonation of these reactions were determined. The protonation of carboxyl group was studied by using nitric acid as titrant, and the protonation of amino group was studied by using imidazolium ion as titrant. The results are in od agreement with literature values.
- Tiration calorimetry,
- Amino acid,
- Protonation reaction
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