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

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Abstract

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%).

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Fig. 1

Source: Inmetro Fluid Laboratory (Laflu)

Fig. 2

Source: API [18]

Fig. 3

Source: Inmetro Fluid Laboratory (Laflu)

Fig. 4

Source: Inmetro Fluid Laboratory (Laflu)

Fig. 5

Source: Inmetro Fluid Laboratory (Laflu)

Fig. 6

Source: JJ Junior

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Acknowledgements

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.

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Authors and Affiliations

  1. National Institute of Metrology Quality and Technology – INMETRO, Duque de Caxias, RJ, Brazil

    J. J. P. Santos Junior, M. Rosendahl, D. M. E. Santo Filho & J. M. G. Gouveia

  2. Fluminense Federal University – PGMEC-UFF, Niterói, RJ, Brazil

    J. J. P. Santos Junior & R. G. Pereira

  3. Estácio de Sá University – UNESA, Rio de Janeiro, Brazil

    M. Rosendahl

  4. State University of Rio de Janeiro - UERJ, Rio de Janeiro, Brazil

    M. Rosendahl

Authors
  1. J. J. P. Santos Junior
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  2. R. G. Pereira
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  3. M. Rosendahl
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  4. D. M. E. Santo Filho
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  5. J. M. G. Gouveia
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Correspondence to J. J. P. Santos Junior.

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Technical Editor: Jose A. R. Parise.

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Santos Junior, J.J.P., Pereira, R.G., Rosendahl, M. et al. The use of ethanol to determine the volume of a pycnometer used to measure the density of liquids at different temperatures and pressures. J Braz. Soc. Mech. Sci. Eng. 42, 50 (2020). https://doi.org/10.1007/s40430-019-2107-y

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  • DOI: https://doi.org/10.1007/s40430-019-2107-y

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