The use of ethanol to determine the volume of a pycnometer used to measure the density of liquids at different temperatures and pressures

  • J. J. P. Santos JuniorEmail author
  • R. G. Pereira
  • M. Rosendahl
  • D. M. E. Santo Filho
  • J. M. G. Gouveia
Technical Paper


Steel pycnometers are used to determine density of liquids and gases at different temperatures and pressures. In order to determine this density with reliability, it is necessary to define the mass and the volume of this artifact with the best possible accuracy. This work proposes a methodology for calibrating this artifact, using the gravimetric method, in the pressure range from 1 bar (0.1 MPa) up to 96 bar (9.6 MPa), at the temperature of 20 °C, using Ethanol Pa (with 95% purity in volume). The results of uncertainty of volume for ambient conditions are shown here. The pycnometer volume equation was developed in the pressure range of 1 bar (0.1 MPa) up to 96 bar (9.6 MPa) for the temperature of 20 °C, whose uncertainty found was 0.055 cm3 (0.006%).


Density Pycnometer Ethanol Pa Calibrating 



Santos Junior J.J.P. is grateful to PRONAMETRO; R.G. Pereira is grateful to the National Research Council of Brazil, CNPq, and M. Rosendahl is grateful to PRONAMETRO and UNESA for the financial support.

Compliance with ethical standard

Conflict of interest

The authors declare that they have no conflict of interest.


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Copyright information

© The Brazilian Society of Mechanical Sciences and Engineering 2019

Authors and Affiliations

  • J. J. P. Santos Junior
    • 1
    • 2
    Email author
  • R. G. Pereira
    • 2
  • M. Rosendahl
    • 1
    • 3
    • 4
  • D. M. E. Santo Filho
    • 1
  • J. M. G. Gouveia
    • 1
  1. 1.National Institute of Metrology Quality and Technology – INMETRODuque de CaxiasBrazil
  2. 2.Fluminense Federal University – PGMEC-UFFNiteróiBrazil
  3. 3.Estácio de Sá University – UNESARio de JaneiroBrazil
  4. 4.State University of Rio de Janeiro - UERJRio de JaneiroBrazil

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