LrgpV1, Main, Exploration, bibRecord, 000163

Experimental Measurement and Correlation of Solubility Data and Thermodynamic Properties of Protocatechuic Acid in Four Organic Solvents

Identifieur interne : 000163 ( Main/Exploration ); précédent : 000162; suivant : 000164

Experimental Measurement and Correlation of Solubility Data and Thermodynamic Properties of Protocatechuic Acid in Four Organic Solvents

Auteurs : Adel Noubigh [Tunisie] ; Abdelkarim Aydi [France] ; Manef Abderrabba [Tunisie]

Source :

Journal of Chemical and Engineering Data [ 0021-9568 ] ; 2015-03.

RBID : Hal:hal-01273369

Abstract

Using a thermostated reactor and UV/vis spectrophotometer analysis, the solubility of protocatechuic acid (PA) in ethanol, methanol, methyl acetate, and ethyl acetate was measured from (293.15 to 318.15) K at atmospheric pressure. The effect of solvent type and temperature on the solubility are discussed. The relative solubility of protocatechuic acid in different solvents was determined in descending order to be x(methanol) > x(ethanol) > x(methyl) > x(ethyl). The experimental solubility data of the solutes (PA) in four pure solvents was correlated with the modified Apelblat equation and semiempirical Buchowski-Ksiazczak lambda h equation. Dissolution standard molar enthalpy Delta H-sol degrees (kJ.mol(-1)), Gibbs energy Delta(sol)G degrees (kJ center dot mol(-1)), and entropy Delta S-sol degrees (J center dot mol(-1) center dot K-1) of protocatechuic acid were estimated using the solubility data.

Url:

https://hal.univ-lorraine.fr/hal-01273369

DOI: 10.1021/je500519y

Affiliations:

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<front><div type="abstract" xml:lang="en">Using a thermostated reactor and UV/vis spectrophotometer analysis, the solubility of protocatechuic acid (PA) in ethanol, methanol, methyl acetate, and ethyl acetate was measured from (293.15 to 318.15) K at atmospheric pressure. The effect of solvent type and temperature on the solubility are discussed. The relative solubility of protocatechuic acid in different solvents was determined in descending order to be x(methanol) > x(ethanol) > x(methyl) > x(ethyl). The experimental solubility data of the solutes (PA) in four pure solvents was correlated with the modified Apelblat equation and semiempirical Buchowski-Ksiazczak lambda h equation. Dissolution standard molar enthalpy Delta H-sol degrees (kJ.mol(-1)), Gibbs energy Delta(sol)G degrees (kJ center dot mol(-1)), and entropy Delta S-sol degrees (J center dot mol(-1) center dot K-1) of protocatechuic acid were estimated using the solubility data.</div>
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Experimental Measurement and Correlation of Solubility Data and Thermodynamic Properties of Protocatechuic Acid in Four Organic Solvents

Experimental Measurement and Correlation of Solubility Data and Thermodynamic Properties of Protocatechuic Acid in Four Organic Solvents

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Abstract

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