Flame and flameless atomic-absorption determination of tellurium in geological materials
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.
Citation Information
Publication Year | 1978 |
---|---|
Title | Flame and flameless atomic-absorption determination of tellurium in geological materials |
DOI | 10.1016/S0003-2670(01)83660-6 |
Authors | T. T. Chao, R.F. Sanzolone, A.E. Hubert |
Publication Type | Article |
Publication Subtype | Journal Article |
Series Title | Analytica Chimica Acta |
Index ID | 70012633 |
Record Source | USGS Publications Warehouse |