Papers by Keyword: Interlaboratory Comparison

Abstract: An interlaboratory comparison for positron annihilation lifetime (PAL) measurements for pure nickel and fused silica was performed. Based on the reported positron (for nickel) and positronium (for fused silica) lifetimes, the uncertainties in the PAL measurements were estimated.

Abstract: Two similar approaches are presented for performing consistency checking of measured data in cases where associated uncertainty values are provided. The key differences between the approaches concern the determination of a consistent subset, and the treatment of measured data deemed to fall outside that subset. The different approaches reflect the priorities of their respective domains of application, namely on-line sensor monitoring, and interlaboratory comparisons.

Abstract: On the basis of data gathered in connection with a certification project, problems were investigated that impair the accuracy of quantitative phase analyses (QPA) using the Rietveld method. Some mechanisms were elucidated by which insufficient counting statistics of the diffraction data or inappropriate data handling and refinement strategy influence the QPA results.