Determination of iridium in industrial concentrates by controlled-potential coulometry with a glassy-carbon electrode
The authors present a coulometric method for determining iridium without separating nonferrous and noble metals using a glassy-carbon (GC) crucible instead of the expensive platinum electrode. The crucible also serves as the electrochemical cell for the coulometric determination and as a vessel in which an aliquot weight of the analyzed solution is taken. The KP-3 concentrate contains several metals that accompany iridium. The main metals which interfere in the electrochemical determination of iridium with the use of a platinum electrode are iron and ruthenium. This paper describes the authors' proposed procedure for determining iridium in hydrochloric acid solutions with the GC crucible-electrode.
- Research Organization:
- V.I. Vernadskii Institute of Geochemistry and Analytical Chemistry, Moscow, USSR
- OSTI ID:
- 6225966
- Journal Information:
- Ind. Lab. (Engl. Transl.); (United States), Journal Name: Ind. Lab. (Engl. Transl.); (United States) Vol. 52:8; ISSN INDLA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
400105* -- Separation Procedures
CARBON
CHEMICAL ANALYSIS
COMPARATIVE EVALUATIONS
DISPERSIONS
ELECTRODES
ELEMENTS
HYDROCHLORIC ACID
HYDROGEN COMPOUNDS
INORGANIC ACIDS
INTERFERING ELEMENTS
IRIDIUM
IRIDIUM COMPOUNDS
IRON COMPOUNDS
MATERIAL SUBSTITUTION
MATERIALS TESTING
METALS
MIXTURES
NITRIC ACID
NONMETALS
PHOSPHORIC ACID
PLATINUM
PLATINUM METALS
PROCESS SOLUTIONS
QUANTITATIVE CHEMICAL ANALYSIS
REFRACTORY METAL COMPOUNDS
RESOURCE CONSERVATION
RUTHENIUM COMPOUNDS
SOLUTIONS
TESTING
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
VALENCE
VOLTAMETRY