Abstract

A method is described for the determination of Ag, As, Bi, Cd, Cu, Ge, In, Pb, Sb, Sn, Te, and Tl at the sub-part per million level in a variety of materials. The elements are concentrated as sulfides using molybdenum as a carrier. After conversion to MoO₃, the residue is excited with a dc arc. Gold is used as both a chemical recovery and spectrographic internal standard. The method is applicable to any material whose matrix does not precipitate in acid sulfide solution. A single set of MoO₃-base synthetic standards is used.

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)

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

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

A Method of Spectrographic Analysis of Impurities in Materials for Oxide Coating of Thermionic Cathodes*

T. J. Organ and S. L. Parsons
J. Opt. Soc. Am. 38(2) 191-195 (1948)

An Application of Spectrographic Methods to Chemical Concentrations of Trace Elements in Iron and Steel Analysis

R. A. Wolfe and R. G. Fowler
J. Opt. Soc. Am. 35(1) 86-91 (1945)

The Quantitative Spectrographic Analysis of the Rare Earth Elements*I. Determination of Samarium in NeodymiumII. Determination of Europium in Samarium

Velmer A. Fassel and Harley A. Wilhelm
J. Opt. Soc. Am. 38(6) 518-526 (1948)