On the use of sulfonated tolyl and xylyl stearic acids as polarographic maxima suppressors

Summary Sulfonated tolyl and xylyl steario acids were used as maxima suppressors in the reduction of simple and complex metal ions. It was found that these compounds can be employed as maxima suppressors for the cathodic waves of Pb²⁺, Co²⁺, Ni²⁺, copper glycine complex and copper biuret complex. In the case of difficulty suppressible maxima like those of iodide-cadmium complex and Ni²⁺-Co²⁺ mixture these were found to be more effective than other maxima suppressors. The P. M. P. and M. S. P. values were calculated in presence of these ions. The P.M.P. values of STSA were found to be greater than those for SXSA. This behaviour may be attributed to greater +I effect of xylyl group.