Technology reports of the Yamaguchi University

Back to Top

Technology reports of the Yamaguchi University Volume 5 Issue 5
published_at 1996-12

Determination of silicon by atomic absorption spectrometry using a graphite furnace coated with tungsten carbide

Determination of silicon by atomic absorption spectrometry using a graphite furnace coated with tungsten carbide
Yamaguchi Tomoki
Sata Toshikatsu
fulltext
382 KB
KJ00004351182.pdf
Descriptions
Silicon was determined by atomic absorption spectrometry with a coated graphite furnace. Pyrolytic graphite tube was coated with tungsten carbide. A mixture of strontium nitrate, ammonium tungstate and EDTA ammonium salt was then added to a sample solution as a matrix modifier. Using a coated tube with tungsten and this matrix modifier, the determination of silicon was successful with high sensitivity and better reproducibility. No interference from metal nitrates and chlorides was observed. In spite of addition of EDTA ammonium salt, the sulfate interference was serious.