Flame and flameless atomic-absorption determination of tellurium in geological materials
Analytica Chimica Acta
By: T. T. Chao, R. F. Sanzolone, and A.E. Hubert
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Abstract
The sample is digested with a solution of hydrobromic acid and bromine and the excess of bromine is expelled. After dilution of the solution to approximately 3 M in hydrobromic acid, ascorbic acid is added to reduce iron(III) before extraction of tellurium into methyl isobutyl ketone (MIBK). An oxidizing air-acetylene flame is used to determine tellurium in the 0.1–20 ppm range. For samples containing 4–200 ppb of tellurium, a carbon-rod atomizer is used after the MIBK extract has been washed with 0.5 M hydrobromic acid to remove the residual iron. The flame procedure is useful for rapid preliminary monitoring, and the flameless procedure can determine tellurium at very low concentrations.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Flame and flameless atomic-absorption determination of tellurium in geological materials |
| Series title | Analytica Chimica Acta |
| DOI | 10.1016/S0003-2670(01)83660-6 |
| Volume | 96 |
| Issue | 2 |
| Year Published | 1978 |
| Language | English |
| Publisher | Elsevier |
| Description | 7 p. |
| First page | 251 |
| Last page | 257 |