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  Home > JCE Print > Journal of Chemical Education > Issues > 2005  > February  >
In the Laboratory
Cost-Effective Teacher
Analog Spectrophotometers in the Digital Age: Data Acquisition on a Budget
Alexander Y. Nazarenko
Department of Chemistry, State University of New York College at Buffalo, Buffalo, NY 14222

Natalie A. Nazarenko
Information Technology Department, Niagra University, NY 14109

Cover
February 2005
Vol. 82 No. 2
p. 294
Abstract
In this article we describe how to employ an inexpensive analog-to-digital converter and a user interface to Microsoft Excel to make a useful computerized spectrophotometer. Readily available types of data loggers, Vernier LabPro and digital multimeters with an RS-232 interface, were utilized. The proposed design does not compromise the quality of the measurements. The conversion of the data to the Microsoft Excel format makes it a convenient tool for a wide range of data processing applications. The software can operate in Windows 9x/NT/2000/XP environments that are familiar to most chemistry students. The infrared and UV–vis instruments were used for various laboratory experiments in instrumental analytical chemistry and in organic chemistry laboratories.
Supplement
Several examples of code for digital multimeters and for LabPro are available.
*  Contents JCE2005p0294W.doc (Microsoft Word)
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JCE2005p0294W.zip

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More Information
*  Citation
 Nazarenko, Alexander Y.; Nazarenko, Natalie A. J. Chem. Educ. 2005 82 294.
*  Keywords
 IR Spectroscopy; Laboratory Computing / Interfacing; UV–Vis Spectroscopy
*  History
 Created:
Last Updated:		 January 4, 2005
January 12, 2005
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