Collect. Czech. Chem. Commun.
2009, 74, 1309-1321
https://doi.org/10.1135/cccc2009007
Published online 2009-09-03 22:13:52
Adsorption of tetramethylthiourea in concentrated NaClO4 solutions
Dorota Sieńko*, Dorota Gugała-Fekner, Jolanta Nieszporek, Zygmunt Fekner and Jadwiga Saba
Department of Analytical Chemistry and Instrumental Analysis, Faculty of Chemistry, Maria Curie-Skłodowska University, Maria Curie-Skłodowska Sq. 3, 20-031 Lublin, Poland
Abstract
Tetramethylthiourea electrosorption behaviour on the mercury electrode in 2, 3 and 4 mol l–1 NaClO4 was determined by means of double-layer differential capacity measurements. The relative surface excess Γ′ of the adsorbate calculated from the surface pressures depended on the NaClO4 concentration. A clear influence of NaClO4 concentration appeared in the changes of interaction parameter A obtained from the Flory–Huggins isotherm and in the permittivity parameter of the inner layer.
Keywords: Differential capacity; Adsorption isotherm; Electrostatic parameters; Tetramethylthiourea; Mercury electrode.
References: 28 live references.
