DIN 54387-3 Testing of ceramic raw and basic materials - Chemical analysis of boron carbide, boron nitride, other metal borides and elemental boron - Part 3: Determination of the non-metallic major and minor constituents total carbon, total oxygen and total nitrogen as well as of free carbon in B<(Index)4>C and

standard by Deutsches Institut Fur Normung E.V. (German National Standard), 12/01/2016