Journal
THERMOCHIMICA ACTA
Volume 676, Issue -, Pages 249-262Publisher
ELSEVIER
DOI: 10.1016/j.tca.2019.05.008
Keywords
Fast scanning calorimetry; Vapor pressure; Sublimation enthalpy
Funding
- government of Algeria
- Ministry of Education and Science of the Russian Federation [14, Y26.31.0019]
- DFG [407078203]
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Fast scanning calorimetry (FSC) was applied for measurements of the sublimation rates of theophylline, caffeine and anthraquinone as reference compounds. In comparison to conventional vapor pressure determination techniques, this method requires only nano-gram-size samples. The increased surface to volume ratio allows for very high sublimation rates and makes the sublimation process dominant over a possible decomposition. Experimental conditions and data treatment have been elaborated and validated by comparison with reliable literature data, The FSC method opens a new door for reliable experimental determination of vapor pressures and sublimation enthalpies for very low volatile and thermally unstable compounds like bio-relevant molecules.
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