Analytical Method: Ammonium in manure

Instruments and Reagents:

Cat.No. 173016  Spectroquant® VIS Spectrophotometer Prove 100 or

Cat.No. 173017  Spectroquant® UV/VIS Spectrophotometer Prove 300 or

Cat.No. 173018  Spectroquant® UV/VIS Spectrophotometer Prove 600 or

Cat.No. 109748  Spectroquant® Photometer NOVA 30 or

Cat.No. 109751  Spectroquant® Photometer NOVA 60 or

Cat.No. 173632  Spectroquant® Colorimeter Move 100

Cat.No. 114946  Rectangular cells 10 mm and/or

Cat.No. 114947  Rectangular cells 20 mm and/or

Cat.No. 114944  Rectangular cells 50 mm
Cat.No. 114544  Spectroquant® Ammonium Cell Test*
Cat.No. 114559  Spectroquant® Ammonium Cell Test
Cat.No. 114752  Spectroquant® Ammonium Test
Cat.No. 100683  Spectroquant® Ammonium Test
Cat.No. 116754  Water for analysis
Folded filter
Membrane filter with 0.45 μm pore diameter
*not compatible with Move 100
Sample preparation:
Put 10 ml of the sample into a 1000-ml volumetric flask, fill up to volume with water for analysis and mix. After the solid parts have settled, take 10 ml of the supernatant solution and, mixed with a spatula - tipfull of charcoal activated for soil tests, put it into a 50-ml volumetric flask and fill up to volume with water for analysis. Before determination filter the charcoal through a folded filter. In case the solution remains cloudy, filter again through a membrane filter.
Determine with the above mentioned test kits.
Ammonium content in mg/kg NH4 = analysis value in mg/l NH4 x 2000


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