L-丝氨酸在水/DMF混合溶剂中的稀释焓

Enthalpies of dilution of l-serine in water/DMF mixtures.

利用 LKB2 2 77生物活性检测仪对 2 98.15K时 L-丝氨酸在水 / DMF混合溶剂 (浓度范围为 5%～ 4 5% ,以 10 %递增 )中的稀释焓进行了测量 ,结果表明 L-丝氨酸在各种溶液中的相对偏摩尔焓与质量摩尔浓度近似成线性关系 .在水 / DMF混合溶剂中 ,焓对相互作用系数为负值 ,且随 DMF含量的增加而减小 .

The enthalpies of dilution of l\|serine in water/DMF mixtures (in 10% increments ranging from 5% to 45% DMF by mass) were measured with LKB 2277 Bio Activity Monitor at 298.15 K. Calculations show that the relative partial molar enthapies of \$l\$\|serine in the studied solutions vary linearly with molality. The value of pairwise enthalpic interaction coefficients is negative and decreases with increasing the DMF concentration in the mixed solvents.