Phosphoric acid and sodium phosphates for industrial use (including foodstuffs); Determination of fluorine content; Alizarin complexone and lanthanum nitrate photometric method— 8 стр.
Phosphoric acid for industrial use (including foodstuffs); Determination of total phosphorus(V) oxide content; Quinoline phosphomolybdate gravimetric method— 8 стр.
Water quality - Determination of mercury - Method using atomic absorption spectrometry (AAS) with and without enrichment (ISO 12846:2012); German version EN ISO 12846:2012— 26 стр.