Thermodynamic property values of selected polycyclic aromatic hydrocarbons measured by differential scanning calorimetry
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In this study, the use of differential scanning calorimetry (DSC) is demonstrated as a powerful technique that can provide accurate thermodynamic property values of environmental contaminants such as polycyclic aromatic hydrocarbons (PAHs). In total, 47 high purity PAH certified reference materials were selected and analysed by DSC. Their onset melting temperature, enthalpy of fusion and eutectic purity were calculated from the obtained melting endotherms. In addition, the entropy of fusion, which was calculated from the onset melting temperature and enthalpy of fusion, is presented. All measurements were evaluated in a metrologically rigorous manner, including measurement uncertainties.
KeywordsCertified reference materials DSC Enthalpy of fusion Melting temperature Polycyclic aromatic hydrocarbons Purity Trueness Measurement uncertainty
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