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A Pendant Drop Method for Measuring Liquid Interfacial Tension Using CAM Instruments

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This article introduces a simple and reliable method for measuring liquid interfacial tension, called method of pendant drop. The method is investigated to analyze the physical feature and volume of a drop through fitting contour curve of the drop picture. The instrument introduced here is easily to constructed, and also can be used to measure the interfacial tension by the method of drop volume. Furthermore, a pendant drop tensiometry apparatus aided by video-image digitization technology was established, by which static interface or surface tension of some liquids was measured with satisfactory results. Extensive experiments were carried out to evaluate the accuracy and applicability of the instrument in interfacial tension measurement. The results showed that this method can measure the interfacial tension simply, quickly and accurately. The method is especially applicable for non-contact measurement in the experiments.
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Document Type: Research Article

Publication date: March 1, 2012

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  • ADVANCED SCIENCE LETTERS is an international peer-reviewed journal with a very wide-ranging coverage, consolidates research activities in all areas of (1) Physical Sciences, (2) Biological Sciences, (3) Mathematical Sciences, (4) Engineering, (5) Computer and Information Sciences, and (6) Geosciences to publish original short communications, full research papers and timely brief (mini) reviews with authors photo and biography encompassing the basic and applied research and current developments in educational aspects of these scientific areas.
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