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  Home > JCE Print > Journal of Chemical Education > Issues > 2000  > February  >
In the Laboratory
Inexpensive Digital Monitoring of Signals from a Spectronic-20 Spectrophotometer
John R. Amend
Department of Chemistry, Montana State University, Bozeman, MT 59717

Matthew E. Morgan
Department of Chemistry, U.S. Air Force Academy, Colorado Springs, CO

Alex Whitla
Deparment of Chemistry, Mount Allison University, Sackville, NB, Canada

Cover
February 2000
Vol. 77 No. 2
p. 252
Abstract
Obsolete analog-readout vacuum-tube and solid-state Spectronic-20 family spectrophotometers can be found in most college and university chemistry laboratories. While optically these are good single-beam instruments, their electronics package does not permit attachment of recorders or digital displays. This article describes a simple modification that costs less than $10.00 for parts and will permit direct digital readout of the Spectronic-20 signal with a digital voltmeter or a laboratory interface and a computer. When the external plug is removed, the Spectronic-20 reverts to its normal operating mode.
More Information
*  Citation
 Amend, John R.; Morgan, Matthew E.; Whitla, Alex. J. Chem. Educ. 2000 77 252.
*  Keywords
 Laboratory Instruction; UV-Vis Spectroscopy
*  History
 Created:
Last Updated:		 January 5, 2000
April 15, 2005
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