CEN/TC 132/WG 17 - Chemical analysis

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.

This document specifies criteria for sampling and gives guidance on the sampling from melts in order to verify if the chemical composition of the product fabricated from a metal melt is in conformance with the
specification.
NOTE   For sampling from product or laboratory samples see EN 14242 or prEN 14726.

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.