DIN 51457 - DRAFT Draft Document - 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

standard by Deutsches Institut Fur Normung E.V. (German National Standard), 05/01/2015