Abstract
The polarographic reduction current of titanium (IV) in 0.2M oxalic acid is increased by the presence of chlorate ion and exhibits a catalytic wave. This phenomenon was applied to the determination of chlorate ion. When a large amount of titanium (IV) over chlorate ion is present, the catalytic current becomes proportional to chlorate ion concentration. Under this condition, the studies for the effects of sulfuric acid and nitric acid on the catalytic current indicated that only hydrogen ion affected the current. Both hydrogen ion and halide ions increased the catalytic current, but by adding hydrogen ion above 0.5M and halide ions above 0.05M, respectively, the current gave the amount of chlorate ion without interference from those ions. By this method, chlorate ion in the presence of 0.1M perchlorate ion can be exclusively determined.
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