Abstract

A spectrochemical procedure to determine the ratio of the concentration of argon in a sample slightly different from air to the concentration of argon in air was developed using an electrodeless discharge tube and a 22-foot direct-reading optical spectrometer. A precision of ±0.43% at the 95% confidence level was obtained for a single determination made in 1 minute. A method of relative precisions to obtain optimum adjustments of the equipment is described. This method was used to determine the optimum discharge tube pressure and the optimum entrance slit width.

Air-Cooled Electrodes for the Spectrochemical Analysis of Powders*†‡

B. J. Stallwood
J. Opt. Soc. Am. 44(2) 171-176 (1954)

A Photoelectric Instrument for Direct Spectrochemical Analysis

J. L. Saunderson, V. J. Caldecourt, and E. W. Peterson
J. Opt. Soc. Am. 35(11) 681-697 (1945)

Spectrochemical Determination of the Major Constituents of Minerals and Rocks

Aslak Kvalheim
J. Opt. Soc. Am. 37(7) 585-592 (1947)

The Quantitative Spectrochemical Determination of Barium, Strontium, and Calcium*

Werner Hartmann and Betty E. Prescott
J. Opt. Soc. Am. 38(6) 539-541 (1948)

Spectrochemical Determination of Tantalum and Columbium in 18 Cr–8 Ni Stainless Steel*

W. J. Poehlman and R. E. Sarnowski
J. Opt. Soc. Am. 42(7) 489-492 (1952)