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2000
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December
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In the Laboratory
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An Undergraduate Experiment for the Measurement of Trace Metals in Core Sediments by ICP-AES and GFAAS
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Scott A. Mabury, Dan Mathers, David A. Ellis, Patrick Lee, and Adam M. Marsella
Department of Chemistry, University of Toronto, Toronto, ON M5S 3H6, Canada
Marianne Douglas
Department of Geology, University of Toronto, Toronto, ON M5S 3H6, Canada
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December 2000
Vol. 77 No. 12
p. 1611
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| Abstract |
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In this experiment students applied advanced instrumental methods of metals analysis to investigate the imprint of anthropogenic activities as observed in aquatic sediments. Sediments from a mid-latitude varved meromictic lake were collected using a cold finger corer and were sectioned by year; the core covered the time frame 1300 to the present. Metals were extracted by microwave digestion and analyzed by ICP-AES and GFAAS. Quality control spike and recovery, replicate, and blank analyses were all within acceptable limits. Target metal concentrations remained relatively constant until the late 19th century, when lead, manganese, and cadmium increased significantly. The concentrations of these metals then undergo a marked reduction toward the end of the 20th century, indicating a possible change in anthropogenic behavior.
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| Supplement |
The instructions for students and teaching assistants are available.
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 Contents |
JCE2000p1611W_1.doc, JCE2000p1611W_2.doc (Microsoft Word 98, Macintosh)
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| More Information |
Citation |
Mabury, Scott A.; Mathers, Dan; Ellis, David A.; Lee, Patrick; Marsella, Adam M.; Douglas, Marianne. J. Chem. Educ. 2000 77 1611.
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Keywords |
Analytical Chemistry; Atomic Spectroscopy; Environmental Chemistry; Instrumental Methods; Laboratory Instruction; Lead
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History |
Created:
Last Updated: |
November 3, 2000
August 31, 2005
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| Home > JCE Print > Journal of Chemical Education > Issues >
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December
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1611
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