Journal of Thermal Analysis and Calorimetry

, Volume 57, Issue 1, pp 225-234

First online:

The Vapour Pressure and the Enthalpy of Sublimation: Determination by inert gas flow method

  • X. Zielenkiewicz
  • , G. L. Perlovich
  • , M. Wszelaka-Rylik

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A new device, based on the inert gas flow method, for measuring the vapour pressure and the determination of the enthalpy of sublimation in a wide range of temperatures (up to 573 K) is described in this paper. The limits of the flow rate as important experimental parameter were determined for the given instrument. The results of calibration showed a good precision and reproducibility of the measurements of the enthalpy of sublimation. The results of the determination of some derivatives of pyrimidine were presented.

2,4-diamino-6-hydroxypyrimidine enthalpy of sublimation inert gas flow method 1-methyl-4N-methoxycytosine 2,4,6-trihydroxypyrimidine vapour pressure