DIN 51457-2017 陶瓷原材料和基础材料试验. 采用电感耦合等离子体(ICP OES)光发射光谱法和电热蒸发直接测定石墨粉末, 颗粒和团块中痕量杂质的质量分数
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