New measurements and a reference correlation for the surface tension of seawater at atmospheric pressure are presented in this paper. Surface tension of seawater was measured across a salinity range of 20 ⩽ S ⩽ 131 g/kg and a temperature range of 1 ⩽ t ⩽ 92 °C at atmospheric pressure using the Wilhelmy plate method. The uncertainty within measurements varied from 0.18 to 0.37 mN/m with the average uncertainty being 0.22 mN/m. The experimental procedures were validated with tests conducted on ACS reagent grade water and aqueous sodium chloride solutions. Literature data and present measurements were evaluated and a reference correlation was developed expressing surface tension of seawater as a function of temperature and salinity. The average absolute percentage deviation between measurements and the correlation was 0.19% while the maximum deviation was 0.60%.
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Research Article| November 17 2014
Surface Tension of Seawater
K. G. Nayar;
G. H. McKinley;
K. G. Nayar, D. Panchanathan, G. H. McKinley, J. H. Lienhard; Surface Tension of Seawater. J. Phys. Chem. Ref. Data 1 December 2014; 43 (4): 043103. https://doi.org/10.1063/1.4899037
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