Potentiometric determination of persulfate in the presence of organic substances

ABSTRACT

An excellent procedure for the quantitative determination of milligram amounts of persulfate in presence and in absence of organic substances is given. Persulfate is reduced with iodide and the unreacted iodide is titrated with mercury [II] using silver amalgam as the indicator electrode. Since all organic substances are inert towards iodide, they will not interfere with the present method. Such an advantage reveals the importance of the present work, as studies of polymerization reactions depend essentially upon persulfate as an activator