DIN 38406-13-1992
德国检验水、废水和污泥的标准方法.阳离子(E组).用气体乙炔火焰原子吸收分光光谱法测定钾
German standard methods for the examination of water, waste water and sludge; cations (group E); determination of potassium by atomic absorption spectrometry (AAS) using an air-acetylene flame (E 13)