| The composition and the property values of Pt, Pd, Rh for waste autocatalysts were designed based on the current market demand. The process flow for reference material development, and the homogeneity and stability were tested in present study. Characterization analysis and value traceability are made for the materials prepared. According to variance analysis, the materials are homogeneous for Pt, Pd, Rh. t-testing results indicated that the well-prepared samples stored under the normal conditions are stable. The samples are collaboratively certified by ICP-AES, spectrophotometry and flame atomic absorption spectrometry. The certified values for Pt, Pd, Rh are obtained, and the uncertainty for Pt, Pd, Rh are evaluated. The reference material provides a basis for calibrating the instruments, evaluating measurement methods, training Staff or assigning to other materials. |
