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  Home > JCE Print > Journal of Chemical Education > Issues > 1998  > December  >
In the Laboratory
Inhibition of Sulfite Oxidation by Phenols: Screening Antioxidant Behavior with a Clark Oxygen Sensor
László Sipos
Erdey-Grúz Tibor Technical School of Chemistry, Debrecen, Hungary H-4024
Cover
December 1998
Vol. 75 No. 12
p. 1603
Abstract
In this article I describe a simple laboratory exercise to introduce the measurement of dissolved oxygen with a Clark oxygen sensor for a sophomore-level course. The reaction of sulfite with oxygen is slowed or inhibited completely in the presence of certain phenols. This can be followed easily by the degree of oxygen decrease in solution. The experiment demonstrates the effect of antioxidants and differentiates between different kinds of phenols according to their effectiveness. Extension of the technique to structurally similar compounds is also possible.
More Information
*  Citation
 Sipos, László. J. Chem. Educ. 1998 75 1603.
*  Keywords
 Inorganic Chemistry; Environmental Chemistry; Laboratory Instruction
*  History
 Created:
Last Updated:		 June 18, 1999
June 24, 2005
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