Glossary

Measurement uncertainty (or simply uncertainty) defines an interval around the measured value C_MEASURED, where the true value C_TRUE lies with some predefined probability. The measurement uncertainty U itself is the half-width of that interval and is always non-negative. This definition differs from the VIM [ref 6] definition (but does not contradict it) and we use it here as it is generally easier to understand and to relate to practice.

LoD estimated by using matrix matched samples that are put through the whole analysis method (including the sample preparation).

Maximum residue limit: the maximum allowed concentration limit set for the compound in certain matrices.