The traceability scheme in chemical measurement |
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Authors: | X R Pan |
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Institution: | (1) National Research Center for Certified Reference Material, No. 7 District 11, Hepingjie 100013, Beijing, China Tel. 86-10-6422-8403; Fax 86-10-6422-8404, CN |
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Abstract: | Traceability is an essential property of a measurement result. However, it is recognized that the results of chemical measurements
can be lacking in this property. In this paper we try to show how to understand and establish traceability in chemical measurement.
The traceability connotation and the necessity of tracing back to SI units are described by means of comparability well-known.
The roles and interrelationships of quality assurance, accreditation, calibration, reference material, analytical method,
comparison and uncertainty in establishing traceability are explained with the aid of a block diagram. The paper also includes
diagrams illustrating the Chinese situation and experience of establishing traceability for chemical measurement in China. |
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Keywords: | Comparability Uncertainty Traceability chain Primary method Reference material |
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