Ammonia / Ammonium

Ammonium is a crucial component of the nitrogen cycle. Ammonia is the deprotonated form of ammonium. In drinking water treatment, ammonia monitors are usually situated at the front end of the process and are used for intake protection to the works. On a wastewater treatment works, ammonia is often monitored at both the inlet and the outlet to the works.

Low level online ammonia monitors work on the basis of colorimetry as it is more sensitive to low concentrations. For higher concentrations of ammonia, an ion selective electrode is more commonly used as it has a larger working range.

If colorimetry is the measurement principle, the sample is buffered to the correct pH for the chemistry and both ammonia and ammonium are measured. With an ion selective electrode approach, only the ammonium is measured but by simultaneously measuring pH and temperature, the ammonia concentration can be calculated. Typically, both approaches report the results in terms of mg/l nitrogen to overcome the issue of the form of the ammonia/ammonium in the original sample.

For the colorimetric method, Sodium dichloroisocyanurate is hydrolysed to form hypochlorite which reacts with ammonia to form monochloramine. This is then reacted with salicylate in the presence of nitroprusside to form indophenol blue. This is proportional to the initial concentration of ammonia and can be measured at 660nm

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Products for this application

We have a wide range of products, designed to suit everyone.

We supply off the shelf reagents for the following instruments.

Particle element
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Accuseries

An industrial colorimeter for wastewater measurement of ammonia.

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Particle element
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3S

A user friendly ammonia colorimeter for industrial applications.

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Bespoke Manufacturing Services

Looking for similar kits? We have you covered.

3S
PMA Part Number
3S
Ammonia 3S Kit 1ppm N
ATi
OEM Part Number
PMA Part Number
ATi Q46
Q46N
ATi Q46 (Hard Water)
Q46N
ATi Q45
Q45N
PPM ProAm ISE Reagents
Std Low
Std High
PMA Part Number
0.5-5.0mg/L NH4-N
0.5mg/L
5.0mg/L
1.0-10mg/L NH4-N
1.0mg/L
10mg/L
2.0-20mg/L NH4-N
2.0mg/L
20mg/L
3.0-30mg/L NH4-N
3.0mg/L
30mg/L
5.0-50mg/L NH4-N
5.0mg/L
50mg/L
10-100mg/L NH4-N
10mg/L
100mg/L
20-200mg/L NH4-N
20mg/L
200mg/L
ABB Aztec 600 / 1000
OEM Part Number
PMA Part Number
ABB Aztec 600 Colourmetric
AWRK632/0360
ABB Aztec 600 ISE High Range
AWRS620/0304
ABB Aztec 600 ISE
AWRS620/0301
10-1000mg/L NH4-N - PN LCW866
LCW866
Hach Amtax ISE Reagents
OEM Part Number
PMA Part Number
0.02-5.0mg/L NH4-N
LCW889
0.05-20mg/L NH4-N
LCW865
1.0-100mg/L NH4-N
LCW871
10-1000mg/L NH4-N - PN LCW866
LCW866
pHOENIX monitors
Std Low
Std High
PMA Part Number
2.0-8.0 mg/L NH4-N
2.0mg/L
8.0mg/L
1.0-4.0mg/L NH4-N
1.0mg/L
4.0mg/L

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Whitelabel solutions

We can also supply Ammonia Reagents for your instruments, to your formulation, with your branding, full traceability, bespoke MSDS’, and C of A’s. See our manufacturing capabilities for more information or get in touch below.

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