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  Home > JCE Print > Journal of Chemical Education > Issues > 1996  > February  >
Laboratory Experiments
An Inexpensive Detector for Absorbance Measurements in Flow-Injection Analysis
Peter C. Hauser and Norman E. Cates
University of Auckland, Chemistry Department, Private Bag 92019, Auckland, New Zealand
Cover
February 1996
Vol. 73 No. 2
p. 191
Abstract
A photometric transducer for peak detection in flow-injection analysis is described. It relies on a light-emitting diode as the light source and a photodiode as the detector. A logarithmic amplifier is used in order to emulate Beer-Lambert's Law and to directly obtain absorbance readings. The performance has been tested with two commonly employed flow-injection procedures, but the device should be suitable for most methods that may be used in the teaching lab.
More Information
*  Citation
 Hauser, Peter C.; Cates, Norman E. J. Chem. Educ. 1996 73 191.
*  Keywords
*  History
 Created:
Last Updated:		 9/25/1999
5/22/2006
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