DIN 38406-13:1992 德國檢驗水、廢水和污泥的標(biāo)準(zhǔn)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鉀
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)