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  Home > JCE Print > Journal of Chemical Education > Issues > 2006  > June  >
In the Laboratory
Cost-Effective Teacher
A Simple Method for Rapidly Obtaining Absorption Spectra with a Spectronic-20D+ Spectrophotometer
Jonathan E. Thompson
Department of Chemistry, University of Nebraska at Kearney, Kearney, NE 68849
Cover
June 2006
Vol. 83 No. 6
p. 913
Abstract
Recording absorption spectra with a Spectronic 20 can be a monotonous and time-consuming process since students must adjust the wavelength control knob and manually set the 0 and 100% transmittance with a blank prior to making a measurement at each wavelength. This article describes how simple modifications to the Spectronic 20D+ and interfacing this instrument to a popular data acquisition system allows for a ∼10-fold decrease in the time necessary for collection of an absorption spectrum from 400 to 650 nm.
Supplement
Instructions for modifying the Spectronic-20D+ spectrophotometer and infromation about setting up the Vernier LabPro and software are available.
*  Contents Folder JCE2006p0913W containing JCE2006p0913W.doc (Microsoft Word) and absspec.cmbl.
*  Download
JCE2006p0913W.pdf

JCE2006p0913W.zip
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*  Citation
 Thompson, Jonathan E. J. Chem. Educ. 2006 83 913.
*  Keywords
 Computer-Based Learning; First-Year Undergraduate / General; Hands-On Learning / Manipulatives; High School / Introductory Chemistry; Laboratory Equipment / Apparatus; Laboratory Instruction; Second-Year Undergraduate; Spectroscopy; Upper-Division Undergraduate; UV-Vis Spectroscopy
*  History
 Created:
Last Updated:		 4/24/2006
5/23/2006
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