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Division 3.1.2.3 Within-laboratory reproducibility

United Kingdom

Original text. Later amendments are not shown.

  • Prepare a set of samples of specified test material (identical or different matrices), fortified with the analyte(s) to yield concentrations equivalent to 1, 1,5 and 2 times the minimum required performance limit or 0,5, 1 and 1,5 times the permitted limit.

  • At each level the analysis should be performed with at least six replicates.

  • Repeat these steps on at least two other occasions with different operators and different environmental conditions, e.g. different batches of reagents, solvents etc., different room temperatures, different instruments, etc. if possible.

  • Analyse the samples.

  • Calculate the concentration detected in each sample.

  • Find the mean concentration, standard deviation and the coefficient of variation ( %) of the fortified samples.

Notes on Annex I

Textual amendments

F1

Replaced by virtue of 2003/181/EC: Commission Decision of 13 March 2003 amending Decision 2002/657/EC as regards the setting of minimum required performance limits (MRPLs) for certain residues in food of animal origin (Text with EEA relevance) (notified under document number C(2003) 764)