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  Home > JCE Print > Journal of Chemical Education > Issues > 2002  > September  >
In the Laboratory
Spectrophotometric Determination of Total Sulfite in White Wine Samples Using Crude Extracts from Flowers
Márlon Herbert Flora Barbosa Soares, Luiz Antonio Ramos, and Éder Tadeu Gomes Cavalheiro
Departamento de Química, Universidade Federal de São Carlos, São Carlos/SP, Brazil
Cover
September 2002
Vol. 79 No. 9
p. 1111
Abstract
A didactic spectrophotometric method for determining the sulfite content in white wine samples is proposed. It is based upon a discoloring reaction between flower anthocyanins and the sulfite in basic media. Students' results obtained from iodometric data agreed well with results obtained by the proposed procedure. The use of natural dyes attracted students' interest, enhancing the learning process.
More Information
*  Citation
 Soares, Márlon Herbert Flora Barbosa; Ramos, Luiz Antonio; Cavalheiro, Éder Tadeu Gomes. J. Chem. Educ. 2002 79 1111.
*  Keywords
 Analytical Chemistry; Dyes; Food Science; Laboratory Instruction; Natural Products; UV-Vis Spectroscopy
*  History
 Created:
Last Updated:		 August 12, 2002
March 16, 2005
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