BS ISO 11352:2012

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols
5 Principle
6 Procedure
7 Preparative considerations for the estimation
   of measurement uncertainty
8 Evaluation of available precision and bias data
9 Calculation of the combined standard uncertainty
10 Calculation of the expanded uncertaintyainty
11 Estimation of measurement uncertainty from
   reproducibility standard deviation
12 Report
Annex A (normative) - Estimation of the standard
        uncertainty from range control charts
Annex B (informative) - Examples of the estimation
        of measurement uncertainty
Bibliography

Describes methods for the estimation of measurement uncertainty of chemical and physicochemical methods in single laboratories based on validation data and analytical quality control results obtained within the field of water analysis.

This International Standard specifies methods for the estimation of measurement uncertainty of chemical and physicochemical methods in single laboratories based on validation data and analytical quality control results obtained within the field of water analysis.

NOTE1 The principles of the estimation of uncertainty specified in this International Standard are consistent with the principles described in ISO/IEC Guide98-3.

In this International Standard, the quantification of measurement uncertainty relies on performance characteristics of a measurement procedure obtained from validation and the results of internal and external quality control.

NOTE2 The approaches specified in this International Standard are mainly based on QUAM^[11], NEN7779^[8], Nordtest TR 537^[10], and Eurolab TR 1^[9].

NOTE3 This International Standard only addresses the evaluation of measurement uncertainty for results obtained from quantitative measurement procedures. The uncertainties associated with results obtained from qualitative procedures are not considered.