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1 Introduction to Metrology
The basic principles of metrology, a specific roadmap that should be in the minds
of all those conducting chemical measurements, are as follows:
1. A technologically justified measuring procedure should be selected and then verified (in case of validated methods, the laboratory should confirm the possibility
of obtaining the required measuring parameters);
2. The measuring procedure should be described in the form of a mathematical
equation (mathematical model);
3. The unit of measurement should be defined, for which the result maintains measurement traceability and demonstrates that traceability (to the greatest possible
extent);
4. The uncertainty of the measurement result should be evaluated;
5. The relevant certified reference material (CRM) should be used (to the greatest
possible extent).
To conclude, metrology introduces to the area of chemical measurements a unified
approach to the evaluation of analytical parameters of a given method. It involves
validation and a unified approach to delivering the uncertainty of the measurement
result, as well as a unified way to compare the result to the standard—via the traceability.