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  Home > JCE Print > Journal of Chemical Education > Issues > 2001  > January  >
In the Laboratory
Solving a Mock Arsenic-Poisoning Case Using Atomic Spectroscopy
Matthew A. Tarr
Department of Chemistry, University of New Orleans, New Orleans, LA 70148
Cover
January 2001
Vol. 78 No. 1
p. 61
Abstract
A new upper-level undergraduate atomic spectroscopy laboratory procedure has been developed that presents a realistic problem to students and asks them to assist in solving it. Students are given arsenic-laced soda samples from a mock crime scene. From these samples, they are to gather evidence to help prosecute a murder suspect. The samples are analyzed by inductively coupled plasma atomic emission spectroscopy or by atomic absorbance spectroscopy to determine the content of specific metal impurities. By statistical comparison of the samples' composition, the students determine if the soda samples can be linked to arsenic found in the suspect's home. As much as possible, the procedures and interpretations are developed by the students. Particular emphasis is placed on evaluating the limitations and capabilities of the analytical method with respect to the demands of the problem.
Supplement
The "FBI letter", an outline of the procedure and a safety sheet for students, and detailed notes for the instructor are available as supplemental material.
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*  Citation
 Tarr, Matthew A. J. Chem. Educ. 2001 78 61.
*  Keywords
 Analytical Chemistry; Arsenic; Atomic Properties / Structure; Forensic Chemistry; Inquiry-Based / Discovery Method; Instrumental Methods; Metals; Laboratory Instruction
*  History
 Created:
Last Updated:		 November 30, 2000
August 31, 2005
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