Advanced calibration, adjustment, and operation of a density and sound speed analyzer

作者：Fortin Tara J^*; Laesecke Arno; Freund Malte; Outcalt Stephanie

来源：Journal of Chemical Thermodynamics, 2013, 57: 276-285.

DOI：10.1016/j.jct.2012.09.009

• Density
• Isooctane
• Speed of sound
• Toluene
• Uncertainty
• Vibrating tube densimeter

Benchtop measurement systems have emerged as powerful tools in the ongoing quest for thermophysical property data. We demonstrate that these instruments can yield results of high quality if operated in an informed manner. The importance of sample purity, reproducibility over repeatability, expanded calibration and adjustment protocols, and rigorous uncertainty estimates are emphasized. We report measurement results at ambient atmospheric pressure and temperatures from 343 K to 278 K, including expanded uncertainty estimates, for the density and speed of sound of isooctane and for the speed of sound of toluene. These data are useful for validating the performance of such instruments. Published by Elsevier Ltd.

• 出版日期2013-2