Relative Efficacies of Cationic and Anionic Surfactants and Their Mixtures in the Suppression of Polarographic Negative Maximum of Co(ll)

Department of Chemistry, Agra College, Agra-282 002

Manuscript received 16 December 1979, revised 2 July 1980, accepted 25 .August 1980

The suppression of polarographic negative maximum of Co(II) has been attempted by various cationic and anionic surfactants viz., cetyl pyridium bromide (CPB), cetyl trimethyl ammonium bromide (CTAB), cetyl dimethyl benzyl ammonium chloride (CDBAC), sodium lauryl sulphate (SLS), dodecyl benzene suiphonate (DBS), dioctyl sodium sulphosuccinate (DSSS), dibutyl sodium sulphosuccinate (DBSS) and tergitol-7. The relative efficacies of these surfactants and their mixtures have been established on the basis of the kinetic parameter $\propto$n_a, calculated by Koutecky's method. A comparison of ' $\propto$n_a' values at the stage where maximum just disappears gives the relative efficacies of cationic and anionic surfactants and also an insight into their additive or antagonistic influence in the mixture.