Selective precipitation of thorium iodate from a tartaric acid-hydrogen peroxide medium application to rapid spectrophotometric determination of thorium in Silicate Rocks and in Ores
Analytical Chemistry
By: F. S. Grimaldi
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Abstract
This paper presents a selective iodate separation of thorium from nitric acid medium containing d-tartaric acid and hydrogen peroxide. The catalytic decomposition of hydrogen peroxide is prevented by the use of 8quinolinol. A few micrograms of thorium are separated sufficiently clean from 30 mg. of such oxides as cerium, zirconium, titanium, niobium, tantalum, scandium, or iron with one iodate precipitation to allow an accurate determination of thorium with the thoronmesotartaric acid spectrophotometric method. The method is successful for the determination of 0.001% or more of thorium dioxide in silicate rocks and for 0.01% or more in black sand, monazite, thorite, thorianite, eschynite, euxenite, and zircon.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Selective precipitation of thorium iodate from a tartaric acid-hydrogen peroxide medium application to rapid spectrophotometric determination of thorium in Silicate Rocks and in Ores |
| Series title | Analytical Chemistry |
| DOI | 10.1021/ac60125a034 |
| Volume | 29 |
| Issue | 5 |
| Year Published | 1957 |
| Language | English |
| Publisher | ACS Publications |
| Description | 4 p. |
| First page | 848 |
| Last page | 851 |
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