Standard Guide for Evaluating and Expressing the Uncertainty of Radiochemical Measurements

Importancia y uso:

5.1 This guide is intended to help testing laboratories and the developers of methods and software for those laboratories to apply the concepts of measurement uncertainty to radiochemical analyses.

5.2 The result of a laboratory measurement never exactly equals the true value of the measurand. The difference between the two is called the error of the measurement. An estimate of the possible magnitude of this error is called the uncertainty of the measurement. While the error is primarily a theoretical concept, since its value is never known, the uncertainty has practical uses. Together, the measured value and its uncertainty allow one to place bounds on the likely true value of the measurand.

5.3 Reliable measurement-based decision making requires not only measured values but also an indication of their uncertainty. Traditionally, significant figures have been used with varying degrees of success to indicate implicitly the order of magnitude of measurement uncertainties; however, reporting an explicit uncertainty estimate with each result is more reliable and informative, and is considered an industry-standard best practice.

Subcomité:

D19.04

Referida por:

D3648-23, D8537-23, C1128-23

Volúmen:

11.02

Número ICS:

07.030 (Physics. Chemistry), 71.040.40 (Chemical analysis)

Palabras clave:

combined standard uncertainty; expanded uncertainty; measurement; radiation; radiochemistry; uncertainty;