DIN 38406-14:1992 德國檢驗水、廢水和污泥的標準方法.陽離子(E組).用氣體乙炔火焰原子吸收分光光譜法測定鈉
German standard methods for the examination of water, waste water and sludge; cations (group E); determination of sodium by atomic absorption spectrometry (ASS) using an air-acetylene flame (E 14)