Journal of the Japan Institute of Metals and Materials
Online ISSN : 1880-6880
Print ISSN : 0021-4876
ISSN-L : 0021-4876
Determination of Trace Tellurium and Gallium in Nickel-Base Heat-Resisting Alloys by Graphite-Furnace Atomic Absorption Spectrometry
Takeshi KobayashiFumio HiroseShinichi HasegawaHaruno Okochi
Author information
JOURNAL FREE ACCESS

1985 Volume 49 Issue 8 Pages 656-662

Details
Abstract

An analytical method has been established for the determination of trace tellurium and gallium in nickel-base heat-resisting alloys by graphite-furnace atomic absorption specrrometry.
The alloy was dissolved in hydrofluoric acid nitric acid. After the solution (20 mm3) was pipetted into a L’vov platform furnace, it was ashed (Te; 1073 K-40 s, argon 5 cm3/s. Ga; 873 K-40 s, hydrogen 5 cm3/s) and atomized (Te; 2373 K-5 s. Ga; 2873 K-5 s) by using argon as a purge gas.
Synthetic calibration solutions were prepared by adding tellurium and gallium standard solutions to nickel matrix solutions which had the same acid concentrations as those of the sample solutions.
Relative standard deviation of the proposed method was within 3% at 12 ppm of tellurium and 4% at 8 ppm of gallium in nickel-base heat-resisting alloys. The limit of detection was 0.1 ppm of tellurium and 0.15 ppm of gallium, when one gram of the specimen was used.

Content from these authors
© The Japan Institute of Metals
Previous article Next article
feedback
Top