Density and sound velocity measurement by an Anton Paar DSA 5000 density meter: Precision and long-time stability

• Published in: Journal of molecular liquids Vol. 329; p. 115547
• Main Authors: Wagner, Zdeněk, Bendová, Magdalena, Rotrekl, Jan, Sýkorová, Adéla, Čanji, Maja, Parmar, Nirmal
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01-05-2021
• Subjects: Density; Excess volume; Mathematical gnostics; Sound velocity; Vibrating tube density meter; Viscosity correction; Viscosity correction; Mathematical gnostics; Vibrating tube density meter; Density; Excess volume; Sound velocity
• ISSN: 0167-7322; 1873-3166
• DOI: 10.1016/j.molliq.2021.115547

Vibrating tube density meters are frequently used in routine measurements. The instruments are often equiped with a cell for sound velocity measurement. The methodology of measurement is described in the operation manual and many papers contain recommedations how to achieve data with higher precision. This work is aimed to the study of importance of each aspect of the measurement procedures, effects of neglection of a viscosity correction as well as the magnitude of induced errors. Numerical values of all effects are presented. As a result of thorough analysis not yet published recommendations for best practice of density and sound velocity measurements are summarized.
•Long-time stability of density and sound velocity measurement verified.•Effect of selection of density calibration standards evaluated.•Effect of the viscosity correction analyzed.•Error propagation to calculation of excess volumes studied.•Methods of mathematical gnostics used for data analysis.