Ammonia/50N Indophenol
Photometric test for Ammonia in freshwater, seawater, and wastewater
Colour Change
Colourless to Yellow to Green
Range:
0 - 50 mg/L N
Technical Resource:
Ammonia 12N 50N Test Method, Technical Information
Notes:

Ensure that tubetests and sample are between 18°C and 22°C

The 10 minute colour development time is critical, further colour change after that time should be ignored

01
Add 0.2 mL of sample to a Tubetest.
02
Swirl to mix.
03
Use this to "blank" the instrument. Fit the Tubetest adapter to Lumiso, insert tube and press Blank.
04
Remove tube and add a Tubetest Ammonia (Indophenol) tablet. Gently crush tablet and stir.
05
Without delay, place tube in cell holder and press Measure.
06
Allow timer to count down 10:00 minutes.
07
When timer warning sounds, remove tube and invert once.
08
Replace tube back in cell holder and press Measure to display the Ammonia concentration.
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