Hardmetals - Chemical analysis by flame atomic absorption spectrometry - Part 2: Determination of calcium, potassium, magnesium and sodium in contents from 0,001 to 0,02 % (m/m) (ISO 7627-2:1983)
硬质合金 - 火焰原子吸收光谱法进行化学分析 - 第2部分:含量中钙 钾 镁和钠的含量从0.001至0.02%(m/m)(ISO 7627-2:1983)
General requirements concerning the field of application, principle, interfering elements,aparatus, sampling and test report are given in ISO 7627-1. In low concentrations the determination of these elements is very critical.