Investigation of Solid–liquid Equilibrium of Stevioside in Different Pure and Binary Mix Solvents at Various Temperatures.

0509299 - ÚCHP 2020 RIV CA eng J - Journal Article
Asadzadeh, Behnaz - Liu, B. - Yan, W.
Investigation of Solid–liquid Equilibrium of Stevioside in Different Pure and Binary Mix Solvents at Various Temperatures.
Canadian Journal of Chemistry. Roč. 97, č. 12 (2019), s. 815-823. ISSN 0008-4042. E-ISSN 1480-3291
Institutional support: RVO:67985858
Keywords : solubility * stevioside * apelblat equation
OECD category: Physical chemistry
Impact factor: 1.171, year: 2019
Method of publishing: Limited access

The solubility of stevioside (a natural sweetener) in 12 pure solvents (methanol, 1-propanol, 2-propanol, 1-buthanol, 2-buthanol, 1-pentanol, 2-pentanol, 2-ethoxyethanol, 2-propoxyethanol, 2-buthoxyethanol, water, and acetone) and in binary mixed solvents (2-ethoxyethanol + water) have been determined using high performance liquid chromatography (HPLC) method at temperatures ranging from 288.15 to 328.15 K and atmospheric pressure. From the experimental data, it was found that the solubility increased with the rising temperature in all selected solvents. The experimental data for the solubility of stevioside were correlated with Apelblat and non-random two-liquid (NRTL) models. It was found that the Apelblat model has the better
quality in fitting the solubility data. Also, thermodynamic functions of dissolution, mixing and transfer process were calculated by the van’t Hoff equation. Furthermore, the crystal habits of stevioside in selected solvents were studied.
Permanent Link: http://hdl.handle.net/11104/0303680