Characterization of sludges - Pre-treatment for the determination of extractable ammonia using 2 mol/l potassium chloride; German version EN 14671:2006— 12 стр.
Water quality - Determination of ammonium nitrogen - Method by flow analysis (CFA and FIA) and spectrometric detection (ISO 11732:2005); German version EN ISO 11732:2005— 25 стр.
Water quality - Determination of dissolved Li<(hoch)+>, Na<(hoch)+>, NH<(Index)4><(hoch)+>, K<(hoch)+>, Mn<(hoch)2+>, Ca<(hoch)2+>, Mg<(hoch)2+>, Sr<(hoch)2+> and Ba<(hoch)2+> using ion chromatography - Method for water and waste water (ISO 14911:1998); German version EN ISO 14911:1999— 30 стр.
