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Journal of Dispersion Science and Technology Volume 31, 2010 - Issue 2
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Original Articles

A Comparative Analysis of the Changes During Evaporation of Three Different Commercial Emulsion of Unknown Composition

Mateus M. Bergamaschi Department of Pharmaceutical Science, Faculty of Pharmacy, University of São Paulo, Ribeirão Preto, SP, BrazilCorrespondence[email protected]
&
Orlando D. H. Santos Department of Pharmacy, School of Pharmacy, Federal University of Ouro Preto, Ouro Preto, MG, Brazil
Pages 188-199 | Received 22 Sep 2008, Accepted 19 Oct 2008, Published online: 19 Jan 2010
 
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Abstract

Optical microscope and centrifugation were used to observe the structure change during evaporation of three different commercial emulsions of unknown composition. The degree of evaporation under an infrared lamp at 70°C was determined from the changed weight of a microscope slide with the emulsion on a defined area and thickness. The results revealed information as to which kind of structure would appear after evaporation.

Acknowledgments

The authors are grateful to Prof. Dr. Stig E. Friberg for suggesting this research and for his interest.

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