German standard methods for the examination of water, waste water and sludge - Anions (Group D) - Part 23: Determination of selenium by atomic absorption spectrometry (D 23)— 19 стр.
German standard methods for the examination of water, waste water and sludge; cations (group E), determination of nine heavy metals (Ag, Bi, Cd, Co, Cu, Ni, Pb, Tl, Zn) (E21)— 8 стр.
Water quality - Determination of 33 elements by inductively coupled plasma atomic emission spectroscopy (ISO 11885:1996); German version EN ISO 11885:1997— 22 стр.
Water quality; determination of total arsenic; silver diethyldithiocarbamate spectrophotometric method (ISO 6595:1982); german version EN 26595:1992— 12 стр.
