Spectrographic Determination of Trace Elements in Ferrous Materials

Authors: Morello, B.; De Gregorio, P.; Savastano, G.

Source: Applied Spectroscopy, Volume 28, Issue 1, Pages 1-79 (January/February 1974) , pp. 14-23(10)

Publisher: Society for Applied Spectroscopy

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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.

Keywords: Emission spectrography; dc arc; Trace analysis; Carrier distillation; Ferrous materials

Document Type: Research article

DOI: http://dx.doi.org/10.1366/000370274774333046

Affiliations: 1: Centro Sperimentale Metallurgico S.p.A., Casella Postale 10747 EUR, Rome, Italy

Publication date: 1974-01-01

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