Abstract
EXTREME precision and accuracy of the method of determining the density of liquid substances by means of twin silica pycnometers1 opens up the way to precise determination of azeotropic concentrations. The new method is based upon investigating the relation between the density of a mixture of two components and its concentration. For this purpose, several mixtures covering either the whole scale of concentrations or the region about the expected concentration of the azeotrope under investigation, are prepared, and their densities are measured. Then an azeotropic mixture of the same components is distilled with an efficient column, its density is determined and the azeotropic concentration is read directly on the diagram, density/concentration.
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References
Smith, E. R., and Wojciechowski, M., Bull. Int. Acad. Polon., A, 281 (1936); Roczniki Chem., 16, 104 (1936).
Swietoslawski, W., "Ebulliometry" (Polish Academy of Sciences, Cracow, 1936; Chemical Publishing Co., New York, 1937).
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WOJCIECHOWSKI, M. Determination of Azeotropic Concentrations by the Twin Pycnometers Method. Nature 141, 691 (1938). https://doi.org/10.1038/141691a0
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DOI: https://doi.org/10.1038/141691a0
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