DIN EN 15991:2011-04

This standard specifies 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 aforementioned trace contaminations from about 0,1 mg/kg to about 1000 mg/kg, after testing also from 0,001 mg/kg to about 5000 mg/kg. The sample material is evaporated in an argon- carrier-gas stream in a graphite boat in the graphite tube furnace of the ETV unit. The evaporation products containing the element traces are transported as a dry aerosol into the plasma of the ICP-torch and there excited for the emission of optical radiation. The optical radiation is dispersed in a simultaneous emission spectrometer. The intensities of suited spectral lines or background positions are registered with applicable detectors. By comparison of the intensities of the elementspecific spectral lines of the sample with calibration samples of known composition, the mass fractions of the sample elements are determined. The European Standard has been prepared by CEN/TC 187 "Refractory products and materials", the secretariat of which is held by the BSI (United Kingdom). The responsible German committee is Working Committee NA 062-02-64 AA "Chemische Analyse von nichtoxidischen keramischen Roh- und Werkstoffen" ("Chemical analysis of non-oxidic ceramic raw and basic materials") at NMP.