Resumo

ROY, Mahendra Nath  e  CHAKRABORTI, Palash. Exploration of Diverse Interactions of Some Vitamins in Aqueous Mixtures of Cysteine. J. Mex. Chem. Soc [online]. 2014, vol.58, n.2, pp.106-112. ISSN 1870-249X.

The apparent molar volume (ϕ_V), viscosity B-coefficient, molal refraction (R) and adiabatic compressibility (ϕ_K) of Nicotinic Acid, Ascorbic Acid, and Folic Acid have been determined in 0.01, 0.03, 0.05 mol··dm^-3 aqueous Cysteine solutions at 298.15 K from density (ρ), viscosity (η), refractive index (n_D) and speed of sound (u) respectively. The limiting apparent molar volumes (ϕ_V⁰) and experimental slopes (S*_V), derived from the Masson equation, have been interpreted in terms of solute-solvent and solute-solute interactions respectively. The viscosity data were analyzed using the Jones-Dole equation and the derived parameters A and B have also been interpreted in terms of solute-solute and solute-solvent interactions respectively in the solutions. Using the Lorentz-Lorenz equation, molal refractions (R) have been calculated. At infinite dilution, limiting apparent molar adiabatic compressibilities (ϕ_K⁰) of these vitamins were evaluated and discussed.

Palavras-chave : Apparent molar volume; solute-solvent interaction; solute-solute Interaction; cysteine; nicotinic acid; ascorbic acid; folic acid.

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