SEMIAUTOMATIC DETERMINATION OF ELEMENTAL SULFUR IN RUBBER

Electro-active elemental sulphur dissolved in hydrazine hydrate solven t was studied by d.c. polarography, cyclic voltammetry and millicoulom etry in sodium acetate, ammonium tartrate and sodium phosphate buffers in an aqueous medium. The method, which uses a mercury electrode, is highly sensitive with less interference than other polarographic metho ds. The method was extended to the determination of sulphur in pressur e rubber tubing. This paper also suggests a mechanism of electrode rea ction.