STN - Slovak standards

Fertilizers - Determination of urease inhibitor N-(n-butyl)thiophosphoric triamide (NBPT) using high-performance liquid chromatography (HPLC)

Available languages: English

Available design: Print design

Fertilizers - Determination of the water-soluble potassium content

Available languages: English

Available design: Print design

Fertilizers - Spectrophotometric determination of biuret in urea

Available languages: English

Available design: Print design

Inorganic fertilizers - Determination of methylen-urea oligomers using high-performance liquid chromatography (HPLC)

Available languages: English

Available design: Print design

Fertilizers - Determination of urea condensates using high-performance liquid chromatography (HPLC) - Isobutylidenediurea and crotonylidenediurea (method A) and methylen-urea oligomers (method B)

Available design: Print design

Fertilizers - Determination of urea condensates using high-performance liquid chromatography (HPLC) - Isobutylidenediurea and crotonylidenediurea (method A) and methylen-urea oligomers (method B)

Available design: Print design

Fertilizers and raw materials for manufacture thereof. Determination of foreign elements by the AAS method

Available languages: Czech

Available design: Print design

Fertilizers - Determination of ammoniacal nitrogen

Available languages: English

Available design: Print design

Fertilizers - Determination of nitric and ammoniacal nitrogen according to Devarda

Available languages: English

Available design: Print design

Fertilizers - Determination of total nitrogen in urea

Available languages: English

Available design: Print design