Fertilizers - Determination of nitric and ammoniacal nitrogen according to Devarda
Edition 2009-02-28

Tobacco. Determination of nitrate content. Continuous-flow analysis method
Edition 2004-10-11

Fertilizers - Determination of nitric and ammoniacal nitrogen according to Ulsch
Edition 2009-02-28

Fertilizers - Determination of nitric and ammoniacal nitrogen according to Arnd
Edition 2009-06-30

Inorganic fertilizers - Determination of total nitrogen in calcium cyanamide nitrate free
Edition 2023-08-23

Inorganic fertilizers. Determination of total nitrogen in calcium cyanamide containing nitrates
Edition 2023-08-23

Fertilizers - Determination of different forms of nitrogen in the same sample, containing nitrogen as nitric, ammoniacal, urea and cyanamide nitrogen
Edition 2009-06-30

Fertilizers. Determination of total nitrogen in fertilizers containing nitrogen only as nitric, ammoniacal and urea nitrogen by two different methods
Edition 2010-02-28

Water quality. Determination of selected parameters by discrete analysis systems. Ammonium, nitrate, nitrite, chloride, orthophosphate, sulfate and silicate with photometric detection
Edition 2013-12-31

Soil quality. Extraction of trace elements from soil using ammonium nitrate solution
Edition 2009-03-31