A magnetic-suspension apparatus to measure densities of liquids as a function of temperature at pressures up to 100 MPa Application to n-heptane

A densimeter designed for high-pressure work has been constructed. Densities of liquids have been measured with an accuracy of 0.2 per cent through the determination of the buoyancy of a magnetic float immersed in the samples. Thanks to a microbalance, a dynamic method is used to measure the total d...

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Bibliographic Details
Published in:The Journal of chemical thermodynamics 1989, Vol.21 (12), p.1263-1277
Main Authors: Toscani, Siro, Figuière, Pierre, Szwarc, Henri
Format: Article
Language:English
Subjects:
Exact sciences and technology
Mass and density
Measurements common to several branches of physics and astronomy
Metrology, measurements and laboratory procedures
Physics
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Summary:A densimeter designed for high-pressure work has been constructed. Densities of liquids have been measured with an accuracy of 0.2 per cent through the determination of the buoyancy of a magnetic float immersed in the samples. Thanks to a microbalance, a dynamic method is used to measure the total downward force of the magnetic-suspension system and of the floating buoy. The density of n-heptane has been determined from 298.15 to 373.15 K at pressures up to 100 MPa. Our results are compared with those previously published.
ISSN:0021-9614
1096-3626
DOI:10.1016/0021-9614(89)90115-8