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Analytical Method: Ammonium in drinking and surface water

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. 114739  Spectroquant® Ammonium Cell Test
Cat.No. 114558  Spectroquant® Ammonium Cell Test
Cat.No. 114752  Spectroquant® Ammonium Test
Cat.No. 116754  Water for analysis
Cat.No. 108418  Titriplex®  III for analysis
Cat.No. 106498  Sodium hydroxide pellets for analysis
 
Titriplex®  III solution:
Dissolve 12 g Titriplex®  III and 2.6 g sodium hydroxide in 100 ml of water for analysis.
 
Sample preparation:
Turbid samples must be filtered clear for determination.
 
Where the water has previously been through a softening process the analysis may be hindered by the precipitation of alkaline - earth hydroxides. In such cases, after allowing a sufficient time for the color to develop, add dropwise Titriplex®  III solution to dissolve the precipitation. Treat the blank reading also with the same amount of Titriplex®  III.
 
Analysis:
Determine with the above mentioned test kits.

Calculation:
Ammonium content in mg/l NH4 = analysis value in mg/l NH4

Materials

     
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