Abstract

The phosphorus content of steels is determined by means of a Littrow quartz spectrograph equipped with Geiger-Müller photoelectron counter tubes. Emphasis is placed on operation and maintenance procedures for open hearth and foundry furnace control. Arc excitation, which is essential for sensitivity and resolution of the phosphorus line from a nearby copper line, introduces variables requiring close regulation. Temperature of the spectrograph must be maintained at nearly a constant value to prevent the shifting of spectral lines at the focal plane of the instrument. Each determination requires about one minute after the sample has been prepared and loaded, and accuracies are comparable to routine chemical results.

© 1948 Optical Society of America

An Investigation of the Use of Geiger-Müller Photoelectron Counters in the Spectrographic Analysis of Phosphorus in Steel

Richard Hanau and Ralph A. Wolfe
J. Opt. Soc. Am. 38(4) 377-383 (1948)

An Investigation of the Properties and Applications of the Geiger-Müller Photoelectron Counter*

O. S. Duffendack and W. E. Morris
J. Opt. Soc. Am. 32(1) 8-24 (1942)

Detection of Lead in Air with the Aid of a Geiger-Müller Counter

O. G. Koppius
J. Opt. Soc. Am. 39(4) 294-297 (1949)

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*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)