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  Home > JCE Print > Journal of Chemical Education > Issues > 2007  > July  >
In the Laboratory
Circuit Board Analysis for Lead by Atomic Absorption Spectroscopy in a Course for Nonscience Majors
Jeffrey D. Weidenhamer
Department of Chemistry, Ashland University, Ashland, OH 44805
Cover
July 2007
Vol. 84 No. 7
p. 1165
Abstract
Disposal of electronic waste is a growing problem. This article describes an experiment for nonmajors that was developed (i) to demonstrate the concept of atomic absorption (AA) to the students by qualitative screening of circuit board materials and (ii) to demonstrate the use of AA for quantitative analysis of environmental samples. Circuit board samples are digested in aqua regia and analyzed following dilution. This experiment provides an effective demonstration of the lead content of consumer products that students can readily identify with. For nonmajors, the lab provides a significant introduction to major quantitative techniques of environmental analysis. The experiment can readily be extended to projects for science majors in the general chemistry or analytical chemistry courses. The experiment can also easily be connected to discussions of the potential environmental hazards of unsafe disposal of used electronic equipment and discussion of the various public policy options for dealing with this growing problem.
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Instructions for the students and detailed notes for the instructor are available.
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Citation
Weidenhamer, Jeffrey D. J. Chem. Educ. 2007, 84, 1165.
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Keywords
Analytical Chemistry; Applications of Chemistry; Atomic Spectroscopy; Environmental Chemistry; First-Year Undergraduate / General; Hands-On Learning / Manipulatives; Laboratory Instruction; Lead; Metals; Nonmajor Courses; Quantitative Analysis
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History
Created:
Last Updated:
5/29/2007
6/7/2007
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