Solubility of gallic acid, vanillin, syringic acid, and protocatechuic acid in aqueous sulfate solutions from (293.15 to 318.15) K

被引：36

作者：

Nouhigh, Adel ^{[1
]}

Cherif, Mourad ^{[2
]}

Provost, Elise ^{[3
]}

Abderrabba, Manef ^{[1
]}

机构：

[1] IPEST, Lab Physicochim Mat, La Marsa 2070, Tunisia

[2] Univ Tunis El Manar, IPEIEM, El Manar II 2096, Tunisia

[3] ENSTA, Lab Chim & Procedes, F-75739 Paris, France

来源：

JOURNAL OF CHEMICAL AND ENGINEERING DATA | 2008年 / 53卷 / 07期

关键词：

D O I：

10.1021/je800205e

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The solubility of gallic acid, vanillin, syringic acid, and protocatechuic acid in aqueous solutions of various concentrations of sodium sulfate was determined from (293.15 to 318.15) K at atmospheric pressure using a thermostatted reactor and HPLC analysis. Results showed a salting-out effect on the solubility of the tested phenolic compounds. The solubility data were accurately correlated to a semiempirical equation. The temperature dependence of the solubility data were used to estimate thermodynamic properties such as Gibbs free energy (Delta(sol)G degrees), molar enthalpy of dissolution (Delta H-sol degrees), and molar entropy of dissolution (Delta S-sol degrees).

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页码：1675 / 1678

页数：4

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