Metrological traceability of reference measurement procedures

Abstract

Metrological traceability is a key concept of measurement uniformity assurance, characterizing the property of a measurement result, according to which it can be correlated with a reference for comparison through a documented continuous chain of calibrations, each of which contributes to measurement uncertainty. A unit of measurement through its practical implementation, or a measurement technique that includes a unit of measurement for quantities other than ordinal, or a standard can serve as a basis for comparison. However, for many objects in biotechnology and medicine a system for confirming the correctness and required accuracy of the measurement result cannot be implemented. The paper discusses methods and schemes for the implementation of the principle of metrological traceability in the absence of a chain of metrological traceability of the measurement result to a measurement standard. A calibration hierarchy scheme is proposed that combines measurements based on reference measurement procedure and reference materials certified with their help, carried out in the chemical industry and medicine.