Effect of adsorption of tetraalkaylammonium chloride in polarography

Abstract EN

The polarographic behaviour of chromate, iodate and paranitroaniline has been investigated in the presence of different concentrations of tetramethyl, tetraethyl and tetrabutylammonium chloride in 0.1M Na2SO4 and 0.1M H2SO4.

The change in wave height and (E1Ú2) was explained on the basis of adsorption of tetraalkylammonium species on the surface of Hg drop.

Results are discussed in terms of displacement process and hindrance of charge transfer.

The results show that the adsorption strength depends on the molecular weight of tetraalkylammonium salts.

Very weak adsorption was observed in case of tetramethyl, while relatively strong adsorption was observed for tetrabutylammonium species.