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  Home > JCE Print > Journal of Chemical Education > Issues > 2000  > March  >
In the Laboratory
An Inexpensive Convenient Press for KBr and CsI Pellets in Infrared Studies
Chris Kalberg and Paul J. Ogren
Department of Chemistry, Earlham College, Richmond, IN 47374
Cover
March 2000
Vol. 77 No. 3
p. 391
Abstract
Directions are provided for the fabrication of an inexpensive IR salt pellet press that may be used easily and quickly by beginning chemistry students. Following techniques described by others, the pressure is provided by an automotive hydraulic jack, and sample pellets are prepared by laying a hole-punched card on a flat stainless steel plate, filling the hole with ground powder, covering with a second steel plate, and pressing the resulting sandwich to ca. 2300 psi. The additional contributions of this paper are (i) directions for incorporating a hydraulic pressure gauge to facilitate reproducible pellet formation, (ii) guidelines for fabricating simple stainless steel press plates, (iii) the "mass production" of sample cards for larger classes, and (iv) the use of this system for salt pellets with extended IR transmission ranges.
More Information
*  Citation
 Kalberg, Chris; Ogren, Paul J. J. Chem. Educ. 2000 77 391.
*  Keywords
 Inorganic Chemistry; IR Spectroscopy; Laboratory Equipment / Apparatus; Organic Chemistry
*  History
 Created:
Last Updated:		 February 14, 2000
April 15, 2005
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