Some practical aspects of heat capacity determination by differential scanning calorimetry
2020; Elsevier BV; Volume: 687; Linguagem: Inglês
10.1016/j.tca.2020.178574
ISSN1872-762X
AutoresCarlos E. S. Bernardes, Abhinav Joseph, Manuel E. Minas da Piedade,
Tópico(s)Thermal and Kinetic Analysis
ResumoDifferential Scanning Calorimetry (DSC) is a widely accessible and versatile method for the determination of the heat capacities of organic materials as a function of temperature. In routine use, it is typically possible to obtain results with an accuracy better than 3 %. However, to achieve this level of accuracy, careful optimization of the experimental procedure for a specific apparatus must be performed. Using benzoic acid as a test substance, this work highlights some practical aspects of heat capacity measurements by DSC, such as crucible material and its geometry, heating rate, thermal lag, the selection of a suitable pre-stabilization stage before the measurement and the duration of the experiment, that can have a strong influence on the quality of the obtained results.
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