Analytical Method: Phosphate 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. 114543  Spectroquant® Phosphate Cell Test
Cat.No. 114729  Spectroquant® Phosphate Cell Test
Cat.No. 100616  Spectroquant® Phosphate Cell Test
Cat.No. 114848  Spectroquant® Phosphate Test
Cat.No. 100798  Spectroquant® Phosphate Test
Cat.No. 116754  Water for analysis
Charcoal activated for soil tests
Membrane filter with 0.45 μm pore diameter
Sample preparation:
Put 10 ml of the sample into a 1000-ml standard volumetric flask, fill up to volume with water for analysis and mix. After the solid parts have settled, take 20 ml of the supernatant solution and, mixed with a spatula-tipfull of charcoal activated for soil tests, put it into a 200-ml standard 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.
Phosphate content in mg/kg PO4-P = analysis value in mg/l PO4-P x 1000


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