Determination of Thorium in Low-Grade Ores Using a Cation Exchange Separation-EDTA Titration Procedure
The selective cation exchange separation of thorium on AG 50W-X12 resin is combined with a sensitive EDTA titration method using Xylenol Orange as indicator to determine thorium in low-grade ores. The end point is sharp when a back-titration with thorium solution is used. Small amounts of fluoride influence both the sharpness of the end point and the titration volume. Procedures for the determination of thorium in carbonatites and in complex tantaloniobates are described. Interference from traces of ferric iron which blocks the indicator can be suppressed by reduction to the ferrous state with hydroxylamine hydrochloride.
- Research Organization:
- South African Council for Scientific and Industrial Research, Pretoria
- Sponsoring Organization:
- USDOE
- NSA Number:
- NSA-15-032096
- OSTI ID:
- 4825219
- Journal Information:
- Analytical Chemistry, Journal Name: Analytical Chemistry Journal Issue: 12 Vol. 33; ISSN 0003-2700
- Publisher:
- American Chemical Society (ACS)
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
Similar Records
DETERMINATION OF THORIUM PRESENT IN FLUORIDE SALT MIXTURES
Standard test method for aluminum in iron ores by complexometric titration
THE ANALYSIS OF ZIRCONIUM-THORIUM BINARY ALLOYS
Journal Article
·
Wed Jun 01 00:00:00 EDT 1960
· Chemist Analyst
·
OSTI ID:4184718
Standard test method for aluminum in iron ores by complexometric titration
Journal Article
·
Mon Dec 31 23:00:00 EST 1979
· Annu. Book ASTM Stand.; (United States)
·
OSTI ID:6591860
THE ANALYSIS OF ZIRCONIUM-THORIUM BINARY ALLOYS
Journal Article
·
Wed Dec 31 23:00:00 EST 1958
· Analytica Chimica Acta (Netherlands)
·
OSTI ID:4293851