DIN 51457 PDF

Testing of ceramic raw and basic materials – Direct determination of mass fractions of trace impurities in powders, granules and lumps of graphite by optical emission spectroscopy by inductively coupled plasma (ICP OES) and by electrothermal vaporization (ETV) under the action of a halogenated reaction gas (modifiers)
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 05/01/2017