Abstract

A method is described for the spectrographic determination of trace elements in ferrous materials. The powdered sample is first mixed with PTFE (polytetrafluoroethylene) and graphite in the ratio 100:10:25. This mixture is then submitted to direct excitation in a 10 A de are, utilizing a capped supporting electrode of the Scribner-Mullin type, with reverse polarity (sample: negative; counter electrode: positive), the spectrum being taken from the central -cathodic region of the arc. The method may be used to determine Al, As, B, Co, Cr, Cu, Mn, Mo, Nb, Ni, Pb, Sb, Sn, Ti, V, Zn, and Zr. The detection limits are indicated, as are data on the precision and accuracy obtainable.

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 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)

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)

The Quantitative Spectrographic Analysis of the Rare Earth Elements* III. Determination of Major Constituents in Complex Mixtures

Velmer A. Fassel
J. Opt. Soc. Am. 39(2) 187-193 (1949)

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)