Improved evaluation of measurement uncertainty from sampling by inclusion of between-sampler bias using sampling proficiency testing.
Improved evaluation of measurement uncertainty from sampling by inclusion of between-sampler bias using sampling proficiency testing.
复制标题
通过使用抽样能力测试纳入抽样器之间的偏差，改进了对抽样测量不确定性的评估。
DOI：
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发表时间：
2011
期刊：
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通讯作者：
A. Damant
中科院分区：
文献类型：
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作者：
M. Ramsey;B. Geelhoed;R. Wood;A. Damant
对测量结果的不确定度进行现实的估计对于其可靠的解释是必不可少的。这种估计的最新方法包括抽样过程对不确定性的贡献，但它们只包括随机效应而不包括系统效应。抽样能力测试（SPTs）以前被用于评估采样器的性能，但其结果也可用于评估测量不确定度，包括系统效应。一种新的SPT用于测定新鲜黄油中的水分，以说明SPT结果不仅可以用于对样品进行评分，还可以用于估计不确定度。在样本内和样本间评估的不确定度之间的比较被用来证明，在这种情况下，抽样偏差导致扩展相对不确定度的估计值上升了两倍以上（从0.39%上升到0.87%）。本文给出了实验设计和取样目标的一般标准，这些标准需要将这种方法应用于任何材料的测量。
A realistic estimate of the uncertainty of a measurement result is essential for its reliable interpretation. Recent methods for such estimation include the contribution to uncertainty from the sampling process, but they only include the random and not the systematic effects. Sampling Proficiency Tests (SPTs) have been used previously to assess the performance of samplers, but the results can also be used to evaluate measurement uncertainty, including the systematic effects. A new SPT conducted on the determination of moisture in fresh butter is used to exemplify how SPT results can be used not only to score samplers but also to estimate uncertainty. The comparison between uncertainty evaluated within- and between-samplers is used to demonstrate that sampling bias is causing the estimates of expanded relative uncertainty to rise by over a factor of two (from 0.39% to 0.87%) in this case. General criteria are given for the experimental design and the sampling target that are required to apply this approach to measurements on any material.