EN 15991:2015

European foreword
1 Scope
2 Principle
3 Spectrometry
4 Apparatus
5 Reagents and auxiliary material
6 Sampling and sample preparation
7 Calibration
8 Procedure
9 Wavelength and working range
10 Calculation of the results and evaluation
11 Reporting of results
12 Precision
13 Test report
Annex A (informative) - Results of interlaboratory study
Annex B (informative) - Wavelength and working range
Annex C (informative) - Possible interferences and their
        elimination
Annex D (informative) - Information regarding the evaluation
        of the uncertainty of the mean value
Annex E (informative) - Commercial certified reference
        materials
Annex F (informative) - Information regarding the validation
        of an analytical method based on liquid standards in
        the example of SiC and graphite
Bibliography

This European Standard defines a method for the determination of the trace element concentrations of Al, Ca, Cr, Cu, Fe, Mg, Ni, Ti, V and Zr in powdered and granular silicon carbide.Dependent on element, wavelength, plasma conditions and weight, this test method is applicable for mass contents of the above trace contaminations from about 0,1 mg/kg to about 1 000 mg/kg, after evaluation also from 0,001 mg/kg to about 5 000 mg/kg.NOTE 1Generally for optical emission spectrometry using inductively coupled plasma (ICP OES) and electrothermal vaporization (ETV) there is a linear working range of up to four orders of magnitude. This range can be expanded for the respective elements by variation of the weight or by choosing lines with different sensitivity.After adequate verification, the standard is also applicable to further metallic elements (excepting Rb and Cs) and some non-metallic contaminations (like P and S) and other allied non-metallic powdered or granular materials like carbides, nitrides, graphite, soot, coke, coal, and some other oxidic materials (see [1], [4], [5], [6], [7], [8], [9] and [10]).NOTE 2There is positive experience with materials like, for example, graphite, B4C, Si3N4, BN and several metal oxides as well as with the determination of P and S in some of these materials.