CATALYTIC ACTIVITY AND COMPLEXATION .4. 2,2'-BIPYRIDYL AS ACTIVATOR FOR CATALYTIC ULTRAMICRO DETERMINATION OF SILVER

The activation of the catalytic persulphate oxidation of sulphanilic acid when the catalyst, silver(I), is suitably complexed, is discussed. 2,2'-Bipyridyl is proposed as activator as it accelerates the rate-determining step of the process-the oxidation of silver(I) to silver(II). The mechanism of activation is investigated and discussed in detail. On the basis of these investigations a catalytic method has been developed for the determination of silver(I), with a sensitivity of 4 × 10-4 μg ml and ±7·6% relative error. © 1969.