The determination of tungsten and silicon in highly alloyed materials by atomic-absorption spectroscopy

Abstract

Tungsten and silicon are determined in the presence of large amounts of iron, nickel, cobalt, molybdenum and other constituents of highly alloyed materials by means of atomic-absorption spectrophotometry with a nitrous oxide-acetylene flame. Complete dissolution is effected in a mixture of aqua regia and hydrofluoric acid, which necessitates the entire use of plasticsware. Inter-element effects are both numerous and complex, and the method of standard addition is recommended for calibration purposes.