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Applied Scientific Research, Section B

, Volume 4, Issue 1, pp 289–299 | Cite as

A double-beam method of spectral selection with flames

  • C. T. J. Alkemade
  • J. M. W. Milatz
Article

Summary

A non-dispersive, optic-electrical filter instrument is described, which combines high spectral resolving power (~ 0.1 Å) with large luminosity, at wavelengths which are of interest in spectrochemistry. The method is based on the balance of two light-beams emitted by a source S, which are periodically chopped in opposite phase. By placing a flame A containing vapour of some element into one light-beam, this balance is made critical for wavelengths that are specifically absorbed by this vapour. The applicability of a self-radiating flame as absorber could be realized by making use of an a.c. measuring device and by choosing a suitable position of the light-chopper. The described test experiments, which were made with a provisional instrument, prove the applicability of this method, especially in flame photometry.

Keywords

Sodium Content Flame Photometry Discharge Lamp Sodium Lamp Spectral Selectivity 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. 1).
    Milatz, J. M. W., P. M. Endt, C. T. J. Alkemade and J. T. Olink, Physica14 (1948) 260.CrossRefADSGoogle Scholar
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    Brügel, W., Einführung in die Ultrarotspektroskopie, Darmstadt 1954.Google Scholar
  3. 3).
    Kluyver, J.C., Thesis Utrecht 1952, also J. C. Kluyver and J. M. W. M i-latz, Physica 19 (1953) 401.Google Scholar
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    Alkemade, C. T. J., Thesis Utrecht 1954.Google Scholar
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    Elenbaas, W. and J. Riemens, Philips Techn. Rundschau,11 (1950) 304.Google Scholar

Copyright information

© Martinus Nijhoff 1955

Authors and Affiliations

  • C. T. J. Alkemade
    • 1
  • J. M. W. Milatz
    • 1
  1. 1.Physisch Laboratorium der Universiteit UtrechtNederland

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