Abstract
This study introduces a purity determination and uncertainty evaluation method for a new certified reference material (CRM) of Pinocembrin (GBW09554), using a mass balance method and differential scanning calorimetry (DSC). Sample preparation, homogeneity and stability studies, value characterization, and evaluation of uncertainty of a new CRM of Pinocembrin are presented in this paper. The homogeneity and stability are checked using a mass balance method and the stability is tested under different storage conditions. The CRM described above was found to be homogeneous and stable at 25 °C for at least one year. The certified value of Pinocembrin CRM is 99.7% with an extended uncertainty of 0.5% (k = 2). A DSC method is used for purity determination of Pinocembrin for the first time in this paper. The new CRM of Pinocembrin can be used to validate analytical methods, improve the accuracy and comparability of measurement data, establish meteorological traceability of analytical results as well as control the quality of Pinocembrin in relevant food and pharmaceutical formulations.
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