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1997
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October
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In the Laboratory
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Determination of Critical Micelle Concentration of Some Surfactants by Three Techniques
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Ana Dominguez, Aurora Fernandez, Noemi Gonzalez, Emilia Iglesias, and Luis Montenegro
Universidad de La Coruna, Dpto. Química Fundamental e Industrial, Facultad de Ciencias, Campus da Zapateira, 15071 A Coruña, SPAIN
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October 1997
Vol. 74 No. 10
p. 1227
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| Abstract |
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The laboratory experiments described in this work present the CMC-determination of some surfactants by following three different methods, which require the use of the very common techniques in physical chemistry laboratories, such as UV-Vis spectroscopy, luminescence spectroscopy, and electrical conductivity.
In performing these experiments, the CMC of a surfactant is determined by measuring a change (i) in the UV-Vis spectra of benzoylacetone, (ii) in the fluorescence emission spectra of pyrene monomers, and (iii) in the electrical conductivity of an ionic-surfactant solution, as the concentration of the surfactant increases.
The CMC values corresponding to the surfactants sodium dodecyl sulfate, tetradecyl trimethylammonium bromide and polyoxyethylene,9-dodecyl ether determined in this work following the three indicated methods and in the absence and presence of electrolytes and non-electrolytes are reported.
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| More Information |
 Citation |
Dominguez, Ana; Fernandez, Aurora; Gonzalez, Noemi; Iglesias, Emilia; Montenegro, Luis. J. Chem. Educ. 1997 74 1227.
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Keywords |
Laboratory, Physical Chemistry, Conductivity, Micelles, and UV-Vis Spectroscopy
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History |
Created:
Last Updated: |
July 27, 1999
June 23, 2005
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| Home > JCE Print > Journal of Chemical Education > Issues >
1997
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October
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1227
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