Applications involving the iodide ion: VII. Determination of small amounts of cerium(IV) and analysis of its mixtures with some metal ions

A simple, rapid, and reliable method for cerium(IV) alone; in presence of a variety of cations involving rare earths and iron (III); or in binary, ternary, and quaternary mixtures is given. By its aid 10^?3 down to 1.5 × 10^?5 mole of cerium(IV) were determined with requisite accuracy and precision. The potential breaks detecting the end points ranged from a maximum of 410 to a minimum of 100 mV/0.1 ml of 0.05 or 10^?4M titrant, respectively. Analysis of 15 mixtures using the present method together with other recommended procedures was always much less tedious or time-consuming than reported methods.