METHOD OF DETERMINING PLATINUM IN AQUEOUS SOLUTIONS BY CHRONOPOTENTIOMETRY

摘要

FIELD: chemistry.SUBSTANCE: method of determining metal ions involves determining platinum (IV) by chronopotentiometry at controlled potential of minus 0.24 V in real-time on a graphite electrode. Determination of platinum (IV) ions is carried out on a graphite electrode in a stirred solution at controlled potential of minus 0.24 V and detecting response on a background electrolyte of 0.1 M HCl, relative a saturated silver chloride electrode by standard addition method.EFFECT: invention reduces the upper and lower limit of determined platinum content from an electrolytic reduction peak in real-time.2 ex, 1 tbl, 2 dwg