Traceability and uncertainty 鈥?A comparison of their application in chemical and physical measurement
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- 作者：Alex Williams (1)
- 关键词：Traceability ; Measurement uncertainty ; Chemical metrology ; Physical metrology
- 刊名：Accreditation and Quality Assurance ; Journal for Quality ; Comparability and Reliability in Chemical Measurement
- 出版时间：February 2001
- 出版年：2001
- 期刊代码：pc310_0949-1775
- 类别：ch
- 卷：6
- 期：2
- 页码：73-75
- 数据来源：sp
摘要
Establishment of the traceability and the evaluation of the uncertainty of the result of a measurement are essential in order to establish its comparability and fitness for purpose. There are both similarities and differences in the way that the concepts of traceability and uncertainty have been utilised in physical and chemical measurement. The International Committee of Weights and Measures (CIPM) have only in the last decade set up programmes in chemical metrology similar to those that have been in existence for physical metrology for over a century. However, analytical chemists over that same period have also developed techniques, based on the concepts of traceability and uncertainty, to ensure that their results are comparable and fit for purpose. This paper contrasts these developments in physical and chemical metrology and identifies areas where these two disciplines can learn from each other.