Alcance
This International Standard specifies methods for the estimation of measurement uncertainty of chemical andphysicochemical methods in single laboratories based on validation data and analytical quality control resultsobtained within the field of water analysis.NOTE 1 The principles of the estimation of uncertainty specified in this International Standard are consistent with theprinciples described in ISO/IEC Guide 98-3.In this International Standard, the quantification of measurement uncertainty relies on performancecharacteristics of a measurement procedure obtained from validation and the results of internal and externalquality control.NOTE 2 The approaches specified in this International Standard are mainly based on QUAM[11], NEN 7779[8], NordtestTR 537[10], and Eurolab TR 1[9].NOTE 3 This International Standard only addresses the evaluation of measurement uncertainty for results obtainedfrom quantitative measurement procedures. The uncertainties associated with results obtained from qualitative proceduresare not considered.