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A Manual Rectangular KBr Pellet Press

  • M. van Swaay
  • E. M. Winkler

Abstract

The absorbance for a given quantity of a compound in spectroscopic analysis is absolute and depends only on the fraction of that quantity which interacts with the electromagnetic radiation. Also, to maximize the signal-to-noise (S/N) ratio the total optical power of the spectrophotometer should be allowed to interact with the sample. Since the design of the monochromator is normally based on line-shaped entrance and exit slits, the optimum geometry for a sample pellet would be a rectangle of dimensions comparable to the entrance slit. Circular pellets which cover the entire slit keep part of the sample outside the beam; when the pellet diameter is made comparable to the slitwidth, excessive vignetting will occur which will adversely affect the S/N ratio.

Keywords

Entrance Slit Thrust Bearing Exit Slit Cylindrical Pellet Percent Transmittance 
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.
    L. A. Bauman, Jr., Appl. Spectrose. 23, 282 (1969).CrossRefGoogle Scholar
  2. 2.
    W. J. de Klein and K. Ulbert, Anal. Chem. 41, 682 (1969).CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media New York 1974

Authors and Affiliations

  • M. van Swaay
    • 1
  • E. M. Winkler
    • 1
  1. 1.Department of ChemistryKansas State UniversityManhattanUSA

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