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Journal of the Optical Society of America

Journal of the Optical Society of America

  • Vol. 38, Iss. 2 — Feb. 1, 1948
  • pp: 191–194

A Method of Spectrographic Analysis of Impurities in Materials for Oxide Coating of Thermionic Cathodes

T. J. ORGAN and S. L. PARSONS  »View Author Affiliations


JOSA, Vol. 38, Issue 2, pp. 191-194 (1948)
http://dx.doi.org/10.1364/JOSA.38.000191


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Abstract

A method for the quantitative spectrographic analysis of the materials used in oxide coated thermionic cathodes for Fe, Cu, Pb, Mg, Mn, and Al, is described. The materials consist of barium-strontium carbonate or barium-strontium-calcium carbonate. The basic raw materials consist of barium nitrate, strontium nitrate, and calcium nitrate. The method employs briquetted samples and a high voltage alternating current arc. Fifteen samples can each be analyzed for six elements in two hours with an elapsed time of eighty seconds per determination.

Citation
T. J. ORGAN and S. L. PARSONS, "A Method of Spectrographic Analysis of Impurities in Materials for Oxide Coating of Thermionic Cathodes," J. Opt. Soc. Am. 38, 191-194 (1948)
http://www.opticsinfobase.org/josa/abstract.cfm?URI=josa-38-2-191


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References

  1. H. B. Vincent and R. A. Sawyer, "A new microphotometer," J. Opt. Soc. Am. 31, 639 (1941).
  2. S. L. Parsons, "Voltage regulator for a densitometer lamp," J. Opt. Soc. Am. 32, 153 (1942).
  3. H. B. Vincent and R. A. Sawyer, "Rapid processing of photographic plates for routine spectrographic analysis," Spectrochimica Acta 1, 131 (1939).
  4. R. A. Sawyer and H. B. Vincent, "Developments in the rapid spectrographic analysis of iron and steel," Proc. 5th Summer Conf. on Spect. and its Applications (1938).
  5. S. L. Parsons, "Spectrographic determination of thorium in tungsten filament wire," J. Opt. Soc. Am. 33, 659 (1943).
  6. E. A. Boettner and C. F. Tufts, "A study concerning characteristics of the high voltage a.c. arc," J. Opt. Soc. Am. 37, 192 (1947).

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