Abstract
Based on a standard test method for purity by differential scanning calorimetry (DSC), ASTM E 928, a purity determination method for highly pure polycyclic aromatic hydrocarbons (PAHs) has been developed and validated. The robustness of the developed method was investigated by determining, under varying measurement conditions, the purity of two PAH certified reference materials (CRMs), benzo[c]phenanthrene and dibenzo[a,h]anthracene. The repeatability and intermediate precision of the developed method was determined by analysing the purity of benzo[c]phenanthrene and dibenzo[a,h]anthracene and PAH candidate CRMs indeno[1,2,3-c,d]pyrene, 6-methylchrysene and benzo[a]pyrene. The trueness of the method was studied using the same (candidate) CRMs and a series of 42 other PAH CRMs. For each of the five (candidate) CRMs, a full measurement uncertainty budget was developed. Also for PAH materials for which the DSC purity determination method has not been explicitly validated, the relative expanded measurement uncertainty was estimated.
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Certain commercial equipment, instruments, and materials are identified in this paper to specify adequately the experimental procedure. In no case does such identification imply recommendation or endorsement by the European Commission, nor does it imply that the material or equipment is necessarily the best available for the purpose.
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Kestens, V., Roebben, G. & Linsinger, T. Development and validation of a differential scanning calorimetry purity determination method for polycyclic aromatic hydrocarbons. Accred Qual Assur 15, 269–281 (2010). https://doi.org/10.1007/s00769-010-0632-6
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DOI: https://doi.org/10.1007/s00769-010-0632-6