FLUORESCENCE AND METALLIC VALENCY STATES .2. DETERMINATION OF MANGANESE

Manganese is selectively and simply determined through the oxidative reaction of permanganate, formed by catalytic oxidation of manganese(II), upon oxine-5-sulphonic acid to produce a highly fluorescent product; the method is 100 times more sensitive than the conventional permanganate method. The fluorescence intensity attains a maximum after 10 min, is constant for 1 h, and is linear for 2.5 p.p.b. to 2.5 p.p.m. of manganese. Few ions interfere and manganese can be accurately determined in steels and other alloys. © 1969.