EN 14242:2004

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Reagents
6 Equipment
7 Sampling and samples
8 Procedure
9 Correction of short-term fluctuations and drift
10 Investigation of interference
11 Expression of the results
12 Test report
Annex A (informative) Analytical lines
Annex B (informative) Preparation of stock solutions
Bibliography

This European Standard describes detailed steps for dissolution and preparation of calibration solutions. The pre-ferred use is for certification and referee analysis. All instrumentation, including software used in the testing labo-ratories, are different an subject to change. Therefore, general criteria for calibration and measurement are speci-fied.This method has to be used with primary reference materials whose mass of substance have a significant smaller uncertainty as required of the repeatability of the testing procedure.