Abstract

The suppression of cyanogen bands from direct current arc spectra by using atmospheres of argon, helium, and carbon dioxide, and binary mixtures of these gases with oxygen has been investigated. Analytical working curves for the determination of dysprosium, thulium, and holmium in erbium oxide have been prepared from spectra of samples arced in an atmosphere of 80% argon - 20% oxygen. Cyanogen bands were eliminated to permit the use of sensitive lines in these regions; background intensity was also reduced.

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)

Cyanogen Rarefaction Using Solid CO₂

W. J. Wark
J. Opt. Soc. Am. 41(7) 482-482 (1951)

The Spectrographic Analysis of Ferro-Silicon

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

Effects of Inert Atmospheres on Emission Spectra in the Interrupted Arc

H. Stone
J. Opt. Soc. Am. 44(5) 411-413 (1954)