摘要
在298．2K和0．1mol·dm－3（KNO3）离子强度的实验条件下，用常规滴定量热法测定了八种氨基酸羧基质子化反应的平衡常数和反应焓变；用扩展的滴定量热法测定了这些氨基酸氨基质子化反应的平衡常数和反应焓变；并讨论了各热力学性质之间的关系．
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 good agreement with literature values.
出处
《物理化学学报》
SCIE
CAS
CSCD
北大核心
1995年第7期617-621,共5页
Acta Physico-Chimica Sinica
基金
国家自然科学基金
