SEPARATION OF RARE EARTH ELEMENTS IN IRON AND STEEL (in Japanese)
Rare-earth elements are often used for cast iron and steel, and it creates a need for the establishment of an adequate method of chemical analysis for total rare-earth elements or cerium in iron and steel. After some experiments using the radioactive Ce1/sup >/s4>s/sup 1/ as a tracer, a procedure for the determination with fluoride seperation of total rareearth elements in iron and steel was developed. A 2-g sample is dissolved in 6N sulfuric acid, filtered into a polyethylene beaker (300-ml), and diluted to 100 ml; hydrofluoric acid (46%) and a small amount of filter paper are added. The solution is then heated for 10 to 20 minutes, and the fluoride precipitate is filtered and washed thoroughly with a 0.5% sulfuric acid solution containing 5% hydrofluoric acid. The resultant total rare-earth fluoride is ignited in a platinum crucible and weighed as an oxide. (auth)
- Research Organization:
- Fuji Iron and Steel Co., Ltd. Kamaishi Iron Works, Japan
- Sponsoring Organization:
- USDOE
- NSA Number:
- NSA-15-010878
- OSTI ID:
- 4088930
- Journal Information:
- Japan Analyst, Journal Name: Japan Analyst Vol. Vol: 9
- Country of Publication:
- Country unknown/Code not available
- Language:
- Japanese
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