Abstract

A method is presented for the determination of trace quantities of tungsten, tantalum, niobium, molybdenum, vanadium, and chromium in magnesium alloys. In the procedure, the alloys are converted to their sulfates and excited by a 12 A dc are for 70 s in a Harvey Crater graphite electrode. Magnesium sulfate synthetic standards are used. Minimum detectable concentrations ranging from 1 ppm molybdenum and chromium to 20 ppm tungsten and tantalum are indicated. The standard deviations range from 2.9 ppm for tantalum to 9.9 ppm for tungsten at the 50 ppm concentration range.

The Spectrographic Determination of Small Amounts of Impurities in Magnesium Chloride*

Mabel F. Wilson
J. Opt. Soc. Am. 34(4) 229-233 (1944)

Spectrographic Procedure for Analysis of Powdered Samples of Unknown Origin

H. E. Biber and S. Levy
J. Opt. Soc. Am. 47(5) 381-385 (1957)

Determination of the Spectral Emission of Commercial Flashbulbs by Emission Spectrographic Techniques

D. J. Bracco and S. Weisberger
Appl. Opt. 5(8) 1275-1279 (1966)

Emission Spectra Excited in Metal Powder–Oxygen Flames*

Rudolph Edse, K. Narahari Rao, W. A. Strauss, and M. E. Mickelson
J. Opt. Soc. Am. 53(4) 436-438 (1963)

Spectroscopic Analysis of Magnesium Alloys*

T. M. Hess and L. G. Reinhardt
J. Opt. Soc. Am. 34(2) 104-109 (1944)