| 摘要 |
FIELD: chemistry.SUBSTANCE: invention can be used to analyse water from different sources: drinking water, geothermal sources, wash-off from refinement tailings, as well as industrial discharge. The method of determining rhenium (VII) in aqueous solutions by stripping voltammetry based on the selective electrooxidation peak of copper from an intermetallic compound ReCuincludes depositing rhenium on the surface of a graphite electrode along with copper to form an alloy, accumulating rhenium ions on the graphite electrode in a stirred solution in the presence of copper (II) ions for 120-180 s with electrolysis potential of minus 1.0 V from a background electrolyte of 1 M HCl, followed by detection of anodic peaks of selective electrooxidation of copper from the alloy with rhenium at potential sweep rate of 10-20 mV/s; concentration of rhenium ions is determined from the current of the anodic peak of selective electrooxidation of copper in the range of -0.4 to -0.1 V relative to a saturated silver chloride electrode by standard addition method.EFFECT: invention enables to quantitatively determine content of rhenium ions from the selective electrooxidation peak of copper from an alloy with rhenium, obtained during preliminary electroconcentration.2 dwg, 1 ex, 2 tbl |
