Summary
For an investigation of chemical and physical properties of matter density can be a valuable expedient. Up to now methods for the determination of the density of solids, e.g. powders, generally give an accuracy not better than ±5‰ In this paper an apparatus is described allowing to determine the density of solids with an accuracy of at least ±0.2‰
The principle of the method is that a constant volume of a gaseous medium is displaced by the sample which displacement is measured by weighing the corresponding volume of mercury. To keep the volume of the gas sufficiently constant a compensation-manometer is used, which enables to counterbalance the influence of fluctuations in temperature and pressure.
Helium is used by preference, because this gas is considered to give the least complications in comparison with other media.
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Waterman, H.I., Wolfs, P.M.J. Accurate measuring of the density of solids, using helium as a gaseous medium. Appl. sci. Res. 6, 372–384 (1957). https://doi.org/10.1007/BF03185042
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DOI: https://doi.org/10.1007/BF03185042