Solubility, Dissolution Enthalpy and Entropy of Isoimperatorin in Ethanol + Water Solvent Systems from 288.2 to 328.2 K
Solubility, Dissolution Enthalpy and Entropy of Isoimperatorin in Ethanol + Water Solvent Systems from 288.2 to 328.2 K
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DOI：
10.1007/s10953-012-9917-1
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发表时间：
2012-12
影响因子：
1.2
通讯作者：
Ai-guo Zeng;Jun-Jie Zhou;Cong Li;Yang Liu;Xin Yang;Guangde Yang
中科院分区：
文献类型：
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作者：
Ai-guo Zeng;Jun-Jie Zhou;Cong Li;Yang Liu;Xin Yang;Guangde Yang
用紫外分光光度法测定了异欧前胡素在288.2 ~ 328.2K纯溶剂和混合溶剂中的溶解度。异欧前胡素在乙醇和水二元溶剂体系中的溶解度随温度的升高而增大，随溶剂中水的摩尔分数的降低而增大。溶解度数据与修正的Apelblat方程相关。采用van 't霍夫方程计算了异欧前胡素的溶出焓和溶出熵。
The solubility of isoimperatorin in pure solvents and solvent mixtures was measured by UV spectrophotometry from 288.2 to 328.2 K. The solubility of isoimperatorin in binary ethanol and water solvent systems increases with temperature and with decrease of the mole fraction of water in the solvent mixture. The solubility data were correlated with a modified Apelblat equation. The enthalpy and entropy of dissolution of isoimperatorin were evaluated using the van’t Hoff equation.