EN 14726:2005

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols and abbreviations
5 Review and principle of test method
6 Consumables and calibration materials
   6.1 Consumables
   6.2 Reference material and recalibration samples
7 Testing equipment
   7.1 Spark spectrometer
   7.2 Equipment for sample preparation
8 Samples
   8.1 Requirements on test samples
   8.2 Sampling
9 Sample preparation
10 Operating conditions of the spectrometer
11 Taking measurements
12 Calibration and evaluation (methods of calculation)
   12.1 Fundamental principles
   12.2 Standard and reference materials
   12.3 Base calibration
   12.4 Recalibration
   12.5 Alloy group calibration with simultaneous calibration
13 Accuracy (precision and trueness)
   13.1 General
   13.2 Possibility of error
   13.3 Measuring and calibration uncertainty
   13.4 Comprehensive investigation of accuracy
14 Inspection
   14.1 General
   14.2 Continuous supervision
   14.3 Checking the analytical sample
   14.4 Analytical capability
15 Availability of the analytical system
16 Test report
Annex A (informative) Representative sparking area
Bibliography

This European Standard gives guidance on the criteria and the fundamental operation procedure governing the spark optical emission spectral analysis (S OES) of metal samples, beginning with sampling, through sample preparation to reporting the test, as well as the requirements of the whole spark source spectrometric procedure which shall be fulfilled with respect to:observance of the agreed precision and trueness [ISO 3534 1, ISO 5725-1] of the analytical results with reference to the agreed sample or sample area;traceability of the analytical results to the international base units - mass (kg) and amount of substance (mol);proof of agreement between the spark spectrometric result and the average composition of the supplied metal sample within the given uncertainty [ISO 3534 1] of the analytical result;comparability of the test results between different laboratories;as far as possible, a trouble free operation of the spark spectrometer.These guidelines refer to computer controlled simultaneously measuring spectrometers for the analysis of solid samples.