Controlled-Potential Coulometric Titration of Uranium(IV) and Uranium(VI) in Sodium Tripolyphosphate Medium.
The U(IV) and U(VI) contents of a sample can be determined by controlled-potential coulometric titration. Both the oxidation and reduction reactions take place at a mercury pool electrode in a supporting electrolyte that is 8 w/v% sodium tripolyphosphate solution adjusted to pH 7.5 to 9.5. The U(VI) is reduced coulometrically at a potential of -1.35 volts vs S.C.E. The reduction is a direct measure of the U(VI) present. The same test portion is then oxidized coulometrically at +0.1 volt vs S.C.E. The oxidation is a measure of the total U present; the U(IV) content is found by difference. In the range of total U content from 2 to 10 mg, the error of the method is approximately 1%. Various possible interferences were studied; only Cu(II) and Fe(III) caused any significant error. (auth)
- Research Organization:
- Oak Ridge National Lab., Tenn.
- Sponsoring Organization:
- USDOE
- NSA Number:
- NSA-17-010545
- OSTI ID:
- 4710065
- Journal Information:
- Analytical Chemistry, Vol. 35, Issue 2; Other Information: Orig. Receipt Date: 31-DEC-63; ISSN 0003-2700
- Publisher:
- American Chemical Society (ACS)
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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