Volumetric and acoustic properties of amino acids L-Leucine and L-Serine in aqueous solution of ammonium dihydrogen phosphate (ADP) at different temperatures and concentrations. (April 2021)

• Record Type: Journal Article
• Authors: Kumar, Harsh; Kumar, Vaneet; Sharma, Seema; Katal, Arjuna; Alothman, Asma A.
• Is Part Of: Journal of chemical thermodynamics. Volume 155(2021)
• Publication Date: 2021-04
• Subjects: Density -- Speed of sound -- Apparent molar volume -- Solute–solvent interaction -- Ammonium dihydrogen phosphate -- Amino acids; Thermodynamics -- Periodicals; Thermochemistry -- Periodicals; Thermodynamique -- Périodiques; Thermochimie -- Périodiques; Thermochemistry; Thermodynamics; Periodicals; 541.369
• DOI: 10.1016/j.jct.2020.106350
• Languages: English
• ISSNs: 0021-9614

Abstract

Highlights: Densities and speeds of sound measurements of amino acids in aqueous ammonium dihydrogen phosphate solutions. Positive apparent molar volumes predict dominance of solute–solvent interactions in mixtures. Negative values of K ϕ, s 0 shows the dominance of hydrophilic interactions. Partial molar properties of transfer support the existence of interactions between amino acids and phosphate salt. Positive values of pair interaction coefficient predicts the pair interactions among the amino acids and phosphate salt. Abstract: The physicochemical properties of amino acids like L-Leucine and L-Serine in aqueous solution of ammonium dihydrogen Phosphate (ADP) at different temperature analysed by volumetric and acoustic methods. By using density data, apparent molar volume Vϕ, partial molar volume V ϕ 0 and standard partial molar volume of transfer Δ V ϕ 0 have been evaluated. From speed of sound data, apparent molar isentropic compression K ϕ, s apparent partial molar isentropic compression K ϕ, s 0 and partial molar isentropic compression of transfer Δ K ϕ, s o have been calculated. The pair and triplet interaction coefficient have also been calculated. The results have been interpreted in terms of solute–solute and solvent–solvent interactions.