Potentiometric analysis using solutions of cerium sulfates
In a previous work the authors outlined the bases of a new method of instrumental determination of the chemical oxygen consumption (COC): The analysis is performed within the framework of the umpire analysis of COC, but the consumption of the oxidizing agent is continuously recorded according to the change in the emf of the galvanic cell (glass pH-metric electrode; cerium (IV,III) sulfates, potassium bichromate, 7.5 M H/sub 2/SO/sub 4/; and glass redoximetric electrode EO-021. The authors contend that potentiometric recording permits not only a simplication of the determination of COC but also the removal of the rigid limitations on the time of boiling of the sample. Additional information may be obtained on the corresponding and difficultly oxidized substances in the sample to be analyzed. It is noted after a discussion of main peculiarities of the cell that the selection of the conditions of analysis is dictated largely by the requirements set in the determinations of COC which permits a number of shortcomings of the potentiometric method to be determined.
- OSTI ID:
- 7004528
- Journal Information:
- J. Appl. Chem. USSR (Engl. Transl.); (United States), Journal Name: J. Appl. Chem. USSR (Engl. Transl.); (United States) Vol. 59:1, PT. 1; ISSN JAPUA
- Country of Publication:
- United States
- Language:
- English
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ON THE POTENTIOMETRIC DETERMINATION OF LANTHANUM, CERIUM, PRASEODYMIUM, NEODYMIUM, AND SAMARIUM
Related Subjects
400102 -- Chemical & Spectral Procedures
400400* -- Electrochemistry
CERIUM COMPOUNDS
CERIUM SULFATES
CHEMICAL ANALYSIS
CHEMICAL OXYGEN DEMAND
CHEMICAL REACTIONS
ELECTRIC MEASURING INSTRUMENTS
ELECTRICAL EQUIPMENT
ELECTROLYTES
ELECTROMOTIVE FORCE
EQUIPMENT
MEASURING INSTRUMENTS
MONITORING
OXIDIZERS
OXYGEN COMPOUNDS
POTENTIOMETERS
POTENTIOMETRY
QUANTITATIVE CHEMICAL ANALYSIS
RARE EARTH COMPOUNDS
REDOX POTENTIAL
REDOX REACTIONS
REDUCING AGENTS
SULFATES
SULFUR COMPOUNDS
TITRATION