A NEW REDUCTIMETRIC REAGENT: IRON*SUP II/ IN A STRONG PHOSPHORIC ACID MEDIUM. IV. SIMULTANEOUS POTENTIOMETRIC DETERMINATION OF VANADIUM*SUP V/ AND URANIUM*VI/ (OR MOLYBDENUM*SUP VI/) IN MIXTURES
The formal redox potential of the V(V)/V(IV) couple was determined in a medium of varying phosphoric acid concentration. Potentiometric procedures were developed for the simultaneous titrimetric determination of vanadium(V) and uranium(IV) (or molybdenum(VI)) in mixtures, using iron(II) as a reductimetric reagent in 12M phosphoric acid. Two breaks in potential are obtained, the first corresponding to the complete reduction of vanadium(V) to vanadium(IV), and the second to the simultaneous reduction of vanadium(IV) to vanadium(III) and uranium(VI) to uranium(IV) (or molybdenum(VI) to molybdenum(V)). Manganese(II) and tuugsten(VI) do not interfere. The procedures have definite advantages over those involving titanium(III), tin(II), and chromium(II). (auth)
- Research Organization:
- Andhra Univ., Waltair, India
- NSA Number:
- NSA-17-038961
- OSTI ID:
- 4628807
- Journal Information:
- Talanta (England), Journal Name: Talanta (England) Vol. Vol: 10; ISSN TLNTA
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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