Coulometric generation of protons by oxidation of hydrogen dissolved in palladium, in non-aqueous media.
Coulometric generation of H(+) ions by the oxidation of hydrogen dissolved in palladium, in media such as acetone, methyl ethyl ketone, methyl isobutyl ketone, cyclohexanone, acetic anhydride and acetic acid-acetic anhydride mixture, for use in titration of bases, has been investigated. The hydrogen is oxidized at potentials which are much more negative than those of the bases and other components present in the solution. Titrations of numerous bases have established that the oxidation is quantitative and proceeds with 100% current efficiency.
Coulometric generation of H(+) and D(+) ions in aqueous media by anodic oxidation of hydrogen and deuterium dissolved in palladium.
Coulometric generation of H(+) and D(+) ions in aqueous media by the oxidation of hydrogen and deuterium dissolved in palladium, is described. Hydrogen and deuterium dissolved in palladium were found to be oxidized at more negative potentials than the oxidation potentials of water and other components present. The H(+) and D(+) ions generated were used for the titration of tris(hydroxymethyl) aminomethane, piperidine, triethylamine and sodium tetraborate, the end-point being determined potentiometrically with a glass electrode and an SCE. In titrations of 0.001-0.1M solutions of the bases, the current efficiency was 100%.
Coulometric titration of bases in concentrated neutral salt solutions in water and non-aqueous solvents
Abstract Weak bases were titrated with coulometrically generated hydrogen ions in aqueous 8 M sodium perchlorate solutions. Bases with ionization constants as low as 4·10-12 were titrated in acetone containing 3 M lithium perchlorate. Enhancement of end-point breaks was obtained in both solvents in the presence of the concentrated salts. Methods of end-point detection were investigated.