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Article

A Simple Method for Rapidly Obtaining Absorption Spectra with a Spectronic-20D+ Spectrophotometer

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Jonathan E. Thompson

Department of Chemistry, University of Nebraska at Kearney, Kearney, NE 68849

J. Chem. Educ., 2006, 83 (6), p 913

DOI: 10.1021/ed083p913

Publication Date (Web): June 1, 2006

Section:

History, Education, and Documentation

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.