Abstract

A quantitative spectrographic method has been developed for the determination of the following alloying constituents in gold within the concentration range 0.1 to 2.0%: Al, Sb, As, B, Ga, Ge, In, and Sn. The method utilizes a rotating-disc solution technique with internal standard control and ac spark excitation. The minimum sample requirement for a single exposure is 2.5 mg of gold alloy in a 0.25 ml solution volume. Extension of the method to include higher or lower concentration levels or other elements of interest is feasible in most cases. The accuracy of the method ranges from 5.8 to 10.7% at the 95% confidence level.

The Spectrochemical Analysis of Copper Base Alloys*

Edwin K. Jaycox
J. Opt. Soc. Am. 35(2) 175-179 (1945)

Spectrographic Analysis of High Cobalt (Vitallium) Alloys

Y. T. Sihvonen, D. L. Fry, R. E. Nusbaum, and R. R. Baumgartner
J. Opt. Soc. Am. 39(3) 257-260 (1949)

Spectrographic Determination of Trace Elements in 70/30 Brass and Admiralty Brass. Part I*

P. A. Leichtle
J. Opt. Soc. Am. 34(8) 454-463 (1944)

Modifications of Spectrographic Methods for Analysis of Aluminum and Its Alloys

R. W. Callon and J. E. Burgener
J. Opt. Soc. Am. 34(9) 543-549 (1944)

The Spectrochemical Analysis of Nickel Alloys*

Edwin K. Jaycox
J. Opt. Soc. Am. 37(3) 159-162 (1947)