Abstract

A rotating electrode for the spectrographic analysis of metallic samples is described in detail. The method uses cast disc samples 2½ inches in diameter from one-fourth to one-half inch thick. Samples are rotated in a plane perpendicular to the primary slit of the spectrograph at speeds up to five R.P.M. The method of supporting the sample necessitates machining only one surface of the sample to provide both the supporting and sparking surfaces and assures a constant analytical gap distance during rotation. Analytical results are given for the determination of tin and aluminum in zinc and are statistically analyzed for precision by the rotating and conventional methods of analysis. Excitation conditions, line pairs and rotational speeds are given for the analysis of aluminum (.07-.2%), lead (.3-1.5%), iron (.005-1.5%) and tin (.2-2.0%) in zinc.

The Use of Briquetted Samples in the Spectrochemical Analysis of Carbon and Alloy Steels and Other Metals

J. F. Woodruff
J. Opt. Soc. Am. 40(4) 192-196 (1950)

An Improved Electrode Holder for Spectrographic Analysis*

Bourdon F. Scribner and Charles H. Corliss
J. Opt. Soc. Am. 33(9) 515-518 (1943)

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)

The Spectrographic Analysis of Ferro-Silicon

J. H. Coulliette
J. Opt. Soc. Am. 37(8) 609-613 (1947)

A Study of the Applicability of the Pressed Pellet Electrode Method to the Spectrographic Analysis of Nickel Alloys*

C. J. Neuhaus
J. Opt. Soc. Am. 33(3) 167-174 (1943)