In this paper,the thermodynamic parametes on protonation reaction of amino group of L- Serine,L-Threonine,L-Threonine ethyl ester,L-N,N-bis(2-hydroxye thy1 )Serine and L-N,N-bis (2-hydroxyethyl)Threonine have been determined by titration calorimetry at 298.
1mol/dm4的离子强度下,对L-丝氨酸、L-苏氨酸、L-苏氨酸乙酯、L-N,N-g(2羟乙基)丝氨酸和L-N,N一双(2经乙基)苏氨酸5种物质的氨基质子化反应进行了研究,得到了其反应的平衡常数K1,反应焓H1和反应自由能G1,反应熵面S1。