Method for determination of small amounts of rare earths and thorium in phosphate rocks
Analytical Chemistry
By: C. L. Waring and H. Mela Jr.
Links
- The Publications Warehouse does not have links to digital versions of this publication at this time
- Download citation as: RIS | Dublin Core
Abstract
In laboratory investigations, interest developed in the possible rare-earth content of phosphate samples from Florida and the northwestern United States. Because of the difficulty of making chemical determinations of traces of individual rare earths, a combined chemical-spectrographic method was investigated. After removal of iron by the extraction of the chloride with ether, the rare earths and thorium are concentrated by double oxalate precipitation, using calcium as a carrier. The rare earths are freed from calcium by an ammonium hydroxide precipitation with a fixed amount of aluminum as a carrier. The aluminum also serves as an internal standard in the final spectrographic analysis. The method will determine from 0.02 to 2 mg. of each rare earth with an error no greater than 10%. The investigation has resulted in a fairly rapid and precise procedure, involving no special spectrographic setup. The method could be applied to other types of geologic materials with the same expected accuracy.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Method for determination of small amounts of rare earths and thorium in phosphate rocks |
| Series title | Analytical Chemistry |
| Volume | 25 |
| Issue | 3 |
| Year Published | 1953 |
| Language | English |
| Larger Work Type | Article |
| Larger Work Subtype | Journal Article |
| Larger Work Title | Analytical Chemistry |
| First page | 432 |
| Last page | 435 |
| Google Analytic Metrics | Metrics page |