Thermodynamics Research Center, ThermoML : Journal of Chemical and Engineering Data

Surface Tension of Aqueous Solutions of Small-Chain Amino and Organic Acids

Raza, M. A.[Mohsin Ali], Hallett, P. D.[Paul D.], Liu, X.[Xiangyang], He, M.[Maogang], Afzal, W.[Waheed]
J. Chem. Eng. Data 2019, 64, 12, 5049-5056
ABSTRACT
Surface tension was measured for aqueous solutions of DL-malic acid, L-glutamine, L-serine, L-proline, L-methionine, L-valine, and L-lactic acid as a function of concentration using a Du Nouy ring over a temperature range between 298 K and 328 K at 101 kPa atmospheric pressure. Surface tensions of several concentrations of each organic acid were measured to develop four isotherms with a temperature ramp of 10 K starting from 298 K. Cohesive forces between molecules were weakened by temperature rise, resulting in decreased surface tension. Mass concentration and temperature effects on surface tension were reflected by the slopes of the relationships between surface tension and either mass concentration or temperature, respectively. In this study L-serine and L-glutamine showed hydrophilic behaviour while Lproline, L-methionine, DL-malic acid, L-valine, and L-lactic acid had hydrophobic behaviour. For all acids studied here, increased temperature caused decreased surface tension of aqueous solutions of solute.
Compounds
# Formula Name
1 C5H10N2O3 L-glutamine
2 C3H7NO3 L-serine
3 C5H11NO2S L-methionine
4 C5H9NO2 L-proline
5 C4H6O5 hydroxybutanedioic acid
6 C5H11NO2 L-valine
7 C3H6O3 (S)-2-hydroxypropanoic acid
8 H2O water
9 C2H6O ethanol
Datasets
The table above is generated from the ThermoML associated json file (link above). POMD and RXND refer to PureOrMixture and Reaction Datasets. The compound numbers are included in properties, variables, and phases, if specificied; the numbers refer to the table of compounds on the left.
Type Compound-# Property Variable Constraint Phase Method #Points
  • POMD
  • 8
  • Surface tension liquid-gas, N/m ; Liquid
  • Temperature, K; Liquid
  • Liquid
  • Gas
  • Ring tensiometer
  • 29
  • POMD
  • 1
  • 8
  • Surface tension liquid-gas, N/m ; Liquid
  • Temperature, K; Liquid
  • Mass fraction - 1; Liquid
  • Liquid
  • Gas
  • Ring tensiometer
  • 28
  • POMD
  • 1
  • 8
  • Mass density, kg/m3 ; Liquid
  • Mass fraction - 1; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • Vibrating tube method
  • 1
  • POMD
  • 2
  • 8
  • Surface tension liquid-gas, N/m ; Liquid
  • Temperature, K; Liquid
  • Mass fraction - 2; Liquid
  • Liquid
  • Gas
  • Ring tensiometer
  • 28
  • POMD
  • 2
  • 8
  • Mass density, kg/m3 ; Liquid
  • Mass fraction - 2; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • Vibrating tube method
  • 1
  • POMD
  • 3
  • 8
  • Surface tension liquid-gas, N/m ; Liquid
  • Temperature, K; Liquid
  • Mass fraction - 3; Liquid
  • Liquid
  • Gas
  • Ring tensiometer
  • 24
  • POMD
  • 3
  • 8
  • Mass density, kg/m3 ; Liquid
  • Mass fraction - 3; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • Vibrating tube method
  • 1
  • POMD
  • 4
  • 8
  • Surface tension liquid-gas, N/m ; Liquid
  • Temperature, K; Liquid
  • Mass fraction - 4; Liquid
  • Liquid
  • Gas
  • Ring tensiometer
  • 24
  • POMD
  • 4
  • 8
  • Mass density, kg/m3 ; Liquid
  • Mass fraction - 4; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • Vibrating tube method
  • 1
  • POMD
  • 5
  • 8
  • Surface tension liquid-gas, N/m ; Liquid
  • Temperature, K; Liquid
  • Mass fraction - 5; Liquid
  • Liquid
  • Gas
  • Ring tensiometer
  • 32
  • POMD
  • 5
  • 8
  • Mass density, kg/m3 ; Liquid
  • Mass fraction - 5; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • Vibrating tube method
  • 1
  • POMD
  • 6
  • 8
  • Surface tension liquid-gas, N/m ; Liquid
  • Temperature, K; Liquid
  • Mass fraction - 6; Liquid
  • Liquid
  • Gas
  • Ring tensiometer
  • 20
  • POMD
  • 6
  • 8
  • Mass density, kg/m3 ; Liquid
  • Mass fraction - 6; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • Vibrating tube method
  • 1
  • POMD
  • 7
  • 8
  • Surface tension liquid-gas, N/m ; Liquid
  • Temperature, K; Liquid
  • Mass fraction - 7; Liquid
  • Liquid
  • Gas
  • Ring tensiometer
  • 20
  • POMD
  • 7
  • 8
  • Mass density, kg/m3 ; Liquid
  • Mass fraction - 7; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • Vibrating tube method
  • 1
  • POMD
  • 9
  • 8
  • Surface tension liquid-gas, N/m ; Liquid
  • Temperature, K; Liquid
  • Mass fraction - 9; Liquid
  • Liquid
  • Gas
  • Ring tensiometer
  • 10