DETERMINATION OF TRACES OF IRON(III) IN NaF-LiF-KF-UF$sub 4$ WITH THIOCYANATE
BS>A direct spectrophotometric determination of iron(III) in NaF-- LiF-- UF-- UF/sub 4/ was developed in which the sample is dissolved in H/sub 3/PO/sub 4/ -- H/sub 2/SO/sub 4/-- H/sub 3/BO/sub 3/ soluti on. Potassium thiocyanate is added to form the iron(III)-thiocyanate complex, which is then extracted with isobutyl alcohol. The phosphoric acid concertration must be maintained above 8 M to prevent reduction of iron(III) by uranium(IV) during dissolution of the sample. The coefficient of variation for the method was 3% for the range of 0.25 to 1.5 mg of iron(III) per gram of sample. (auth)
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- DOE Contract Number:
- W-7405-ENG-26
- NSA Number:
- NSA-17-025117
- OSTI ID:
- 4703329
- Report Number(s):
- ORNL-TM-472
- Resource Relation:
- Other Information: Orig. Receipt Date: 31-DEC-63
- Country of Publication:
- United States
- Language:
- English
Similar Records
DETERMINATION OF SMALL AMOUNTS OF TANTALUM IN NaF-LiF-KF AND IN NaF-LiF-KF- UF$sub 4$
THE SEPARATION OF URANIUM FROM NaF-KF-UF$sub 4$ AND NaF-ZrF$sub 4$-UF$sub 4$ WITH BrF$sub 3$
Heat transfer measurements in a forced convection loop with two molten-fluoride salts: LiF--BeF/sub 2/--ThF/sub 2/--UF/sub 4/ and eutectic NaBF/sub 4/--NaF
Technical Report
·
Tue Jan 10 00:00:00 EST 1956
·
OSTI ID:4703329
THE SEPARATION OF URANIUM FROM NaF-KF-UF$sub 4$ AND NaF-ZrF$sub 4$-UF$sub 4$ WITH BrF$sub 3$
Technical Report
·
Wed Aug 26 00:00:00 EDT 1953
·
OSTI ID:4703329
Heat transfer measurements in a forced convection loop with two molten-fluoride salts: LiF--BeF/sub 2/--ThF/sub 2/--UF/sub 4/ and eutectic NaBF/sub 4/--NaF
Technical Report
·
Fri Oct 01 00:00:00 EDT 1976
·
OSTI ID:4703329