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3. WFD and traceability
3.1 Introduction – Key elements of the traceability concept
Paragraphs 1 and 2 highlighted the importance of data comparability and traceability in the context of WFD monitoring programs. Let's now take a closer look at the various references that need to be considered to establish a reliable metrological system for such analyses.
Firstly, it should be remembered that ISO defines metrological traceability as "the property of a measurement result or standard such that it can be related to specified references, usually national or international standards, through an unbroken chain of comparisons all having specified uncertainties"
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