Volumetric & Transport Behavior of Neutral Amino Acids in Different Concentrations of an Electrolyte at 25°C
DOI:
https://doi.org/10.53555/nnas.v2i2.686Keywords:
Amino acids, Sodium nitrate, Partial molar volumesAbstract
Apparent molar volumes, V2, of glycine, DL-?-alanine, DL-?-amino-n-butyric acid, L-valine, and L-leucine in water and in (0.25, 0.5, 0.75, 1.0, 1.5, 2.0) mol/kg aqueous potassium nitrate solutions have been determined at T= 298.15 K from density measurements. The standard partial molar volumes at infinite dilution, V20, obtained from V2, ?, have been used to calculate the corresponding volumes of transfer, ?tV0, from water to aqueous potassium nitrate solutions. The hydration number, nH, side chain contributions, and volumetric interaction coefficients of these amino acids have also been calculated. The ΔtV₀ values for the studied amino acids are positive, and these values increase with an increase in the concentration of NaNO₃. .
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