Guidelines on Estimation of Uncertainty of Results

It is a requirement under ISO/IEC 17025 that laboratories determine and make available the uncertainty associated with analytical results. To this end, food testing laboratories operating under Revised Guidelines on Good Laboratory Practice in Pesticide Residue Analysis (CAC/GL 40-1993, Rev. 12003) should have available sufficient data derived from method validation/verification, inter-laboratory studies and in-house quality control activities, which can be applied to estimate the uncertainties particularly for the routine methods undertaken in the laboratory. These guidelines were prepared taking into account the general recommendations of the CCMAS.