Glossary
External validation of analytical methods

Accuracy

Closeness of agreement between a measured quantity value and a true quantity value of a measurand.

Analyte

In chemistry, synonymous with measurand.

Assigned value

Value attributed to a particular property of an entity undergoing proficiency testing.

Bias

Precision error.

Correction

Compensation for an estimated systematic effect.

Expanded uncertainty

Product of a compound standard uncertainty and a factor greater than one. It is denoted $U$ , and the factor used in the definition...