# Commission Regulation (EC) No 401/2006 of 23 February 2006 laying down the methods of sampling and analysis for the official control of the levels of mycotoxins in foodstuffs (Text with EEA relevance), Division 4.1: Definitions

Extent: E+W+S+N.I.

A number of the most commonly used definitions that the laboratory shall be required to use are the following:
r Repeatability, the value below which the absolute difference between two single test results obtained under repeatability conditions, namely same sample, same operator, same apparatus, same laboratory, and short interval of time may be expected to lie within a specific probability (typically 95 %) and hence r = 2,8 × sr.
sr Standard deviation, calculated from results generated under repeatability conditions.
RSDr Relative standard deviation, calculated from results generated under repeatability conditions [(sr / ) × 100].
R Reproducibility, the value below which the absolute difference between single test results obtained under reproducibility conditions, namely on identical material obtained by operators in different laboratories, using the standardised test method may be expected to lie within a certain probability (typically 95 %); R = 2,8 × sR.
sR Standard deviation, calculated from results under reproducibility conditions.
RSDR Relative standard deviation calculated from results generated under reproducibility conditions [(sR / ) × 100].

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Source: https://www.legislation.gov.uk/eur/2006/401/annex/II/division/4/division/4.1 (the official version)
Page: https://openlegislation.uk/eu-regulation-2006-401/annex-II/division-4/division-4.1
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.