氨基酸燃烧热的测量

氨基酸燃烧热的测量 DETERMINATION OF COMBUSTION HEAT OF SOME AMINO—ACIDS 吴鼎泉 Wu Dingquan 1 2 3 first-author 朱元海 Zhu Yuanhai 1 2 3 高振明 Gao Zhenming 1 2 3 屈松生 Qu Songsheng 1 2 3 武汉大学化学系 武汉大学化学系 Department of Chemistry,Wuhan University Department of Chemistry,Wuhan University 武汉大学化学系,武汉 武汉大学化学系,武汉 ,430072 ,430072 用精密静弹燃烧热量计,测量了L-亮氨酸、L-异亮氨酸和L-苏氨酸在298.15K时标准燃烧能,计算了它们在298.15K和标准压力下的标准摩尔生成焓,并用估算物质气态生成焓的经验方法,讨论了被测数据的可靠性。 Using a static oxygen-bomb calorimeter, the standard molar enthalpies of combustion of L-leucine, L-isoleucine and L-threonine at 298.15K were determined to be — 357.03±1.92,—3578.32±1.86 and 84.59±1.07kJ·mol -1 , respectively. the corresponding standard molar enthalpies of formation were calculated as —648.93±1.95, —640.64±1.89 and —776.31±1.10kJ·mol -1 . According to Laidlers method of the estimatiom of enthalpy of formation for organic compounds at gas state, we estimated the enthalpies of sublimation of above three compounds and the comparison of our results with literature values was made. The availabity of our data was discussed. 静态氧弹热量计 标准燃烧能 标准摩尔燃烧焓 标准摩尔生成焓 static oxygen-bomb calorimeter standard molar energy of combustion standard molar enthalpy of combustion standard molar enthalpy of formation O642.3 1993-03-01 2021-04-01 3