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Journal of the Optical Society of America

Journal of the Optical Society of America

  • Vol. 49, Iss. 4 — Apr. 1, 1959
  • pp: 349–355

Characteristics of a Combination Discharge and Its Applicability in Spectrochemical Analysis of Metals

H. E. BIBER and S. LEVY  »View Author Affiliations


JOSA, Vol. 49, Issue 4, pp. 349-355 (1959)
http://dx.doi.org/10.1364/JOSA.49.000349


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Abstract

A combination discharge, obtained by superimposing a low-voltage ac arc with condensed high-voltage discharges, has been investigated with respect to its applicability in spectrochemical analysis of metals. The stability of this combination discharge is comparable to that of a spark discharge and it is considerably more intense than the spark discharge alone. The vaporization of the electrode material can be controlled to some extent independently of excitation. There are indications that this may contribute to an understanding of the influence of extraneous elements.

Citation
H. E. BIBER and S. LEVY, "Characteristics of a Combination Discharge and Its Applicability in Spectrochemical Analysis of Metals," J. Opt. Soc. Am. 49, 349-355 (1959)
http://www.opticsinfobase.org/josa/abstract.cfm?URI=josa-49-4-349


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References

  1. Wa. and We. Gerlach, Clinical and Pathological Applications of Spectrum Analysis (Adam Hilger, Ltd., London, 1934).
  2. K. Pfeilsticker, Z. Electrochem. 43, 719 (1937); Spectrochim. Acta 1, 424 (1940).
  3. A simple and efficient expedient to make the amount of the energy discharged independent of the shape of the electrodes and of the analytical gap was introduced by S. M. Raiskij [J. Tech. Phys. U.S.S.R. 9, 1719 (1939); Bull. acad. sci. U.R.S.S. Sér. phys. 4, No. 1 (1940)]. For a description and evaluation of the Raiskij scheme see also J. Opt. Soc. Am. 35, 221 (1945). The analytical gap is bridged by an induction coil, or by a high resistance; the peak voltage, and therefore the energy of the condenser discharges, is determined by a stationary auxiliary gap.
  4. Owing to the glass optics of the camera and to the sensitivity range of the film, the photographed light is restricted in these pictures to the 4000–4400A section of the spectrum.
  5. J. H. Enns and R. A. Wolfe, J. Opt. Soc. Am. 39, 298 (1949).
  6. It is interesting to note that while the effect of silicon on nickel and chromium determinations is also absent when the combination discharge is produced in an argon atmosphere, the effect of sulfur on manganese determination is very pronounced. Apparently, this is due to the fact that a triggered arc is not readily formed in argon, as can be seen from the appearance of the electrodes after the discharge has been applied.
  7. See, for instance, L. N. Filimonov, Zavodskaya Lab. 15, 1178 (1948).
  8. For some recent results, see J. Jenkins and T. B. Jones, J. Appl. Phys. 28, 663 (1957).

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