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  Home > JCE Print > Journal of Chemical Education > Issues > 2002  > May  >
In the Laboratory
A Graduated Cylinder Colorimeter: An Investigation of Path Length and the Beer-Lambert Law
James Gordon and Stephanie Harman
Division of Science and Mathematics, Central Methodist College, Fayette, MO 65248
Cover
May 2002
Vol. 79 No. 5
p. 611
Abstract
A 10-mL graduated cylinder was used to construct a colorimeter to investigate the relationship between absorbance and path length found in the Beer-Lambert law. Light-emitting diodes (LEDs) were used as the light sources and filter monochromators. The experiments were conducted on intensely colored permanganate and tetraamminecopper(II) solutions. The device also was useful for demonstrating the relationship between absorbance and concentration.
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Details of the construction and use of the apparatus are available.
*  Contents JCE2002p611W.doc (Microsoft Word)
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JCE2002p0611W.zip

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More Information
*  Citation
 Gordon, James; Harman, Stephanie. J. Chem. Educ. 2002 79 611.
*  Keywords
 Chemical Education Research; Inquiry-Based / Discovery Method; Instrumental Methods; Laboratory Instruction; UV-Vis Spectroscopy
*  History
 Created:
Last Updated:		 April 1, 2002
March 16, 2005
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