limit of detection

in analysis

The limit of detection, expressed as the concentration, $c L$ , or the quantity, $q L$ , is derived from the smallest measure, $x L$ , that can be detected with reasonable certainty for a given analytical procedure. The value of $x L$ is given by the equation

$x L = x ̄ bi + k s bi$

where $x ̄ bi$ is the mean of the blank measures, $s bi$ is the standard deviation of the blank measures, and $k$ is a numerical factor chosen according to the confidence level desired.

Source:

Orange Book, p. 5

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Cite as:
IUPAC. Compendium of Chemical Terminology, 2nd ed. (the "Gold Book"). Compiled by A. D. McNaught and A. Wilkinson. Blackwell Scientific Publications, Oxford (1997). XML on-line corrected version: http://goldbook.iupac.org (2006-) created by M. Nic, J. Jirat, B. Kosata; updates compiled by A. Jenkins. ISBN 0-9678550-9-8. https://doi.org/10.1351/goldbook.

Last update: 2014-02-24; version: 2.3.3.

DOI of this term: https://doi.org/10.1351/goldbook.L03540.

Original PDF version: http://www.iupac.org/goldbook/L03540.pdf. The PDF version is out of date and is provided for reference purposes only. For some entries, the PDF version may be unavailable.

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