Measure nitrite directly and separately from nitrate in drinking water, wastewater and aquaculture systems.
Nitrite can tell a different story from nitrate. It may accumulate during a change in biological treatment, appear during nitrification in a distribution system, or rise as an aquaculture biofilter develops.
Aquamonitrix combines ion chromatography with UV detection to quantify nitrite directly. The analytical sequence separates nitrite from nitrate rather than inferring a nitrite value from the nitrate result.
This page focuses on choosing and using the nitrite analyser. For the full product family and wider applications, explore the Aquamonitrix nitrate and nitrite analyser overview.
The sample passes through the ion-chromatography system. Nitrite and nitrate emerge at different points in the analytical sequence.
UV detection measures the separated nitrite response. This provides a specific nitrite concentration alongside the separate nitrate result.
Time-stamped results help your team relate nitrite changes to treatment operation, source-water conditions or a developing biofilter.
Investigate nitrite breakthrough and changes associated with nitrification, including chloraminated systems. Specify a location that answers your operational question.
A nitrite result supports investigation and site procedures; it does not establish drinking-water safety on its own.
Follow nitrite accumulation during biological nitrogen removal. Read the result alongside nitrate, operating conditions and the treatment strategy.
Nitrite information can inform process review, but this analyser does not directly measure nitrous oxide gas.
Track nitrite during biofilter start-up or a change in feed, loading or water exchange. Nitrite and nitrate trends provide different information about the system.
Confirm the required low-level performance and saline-water conditions before specifying a configuration.
Freshwater and wastewater: 0.05–100 mg/L as NO2−. At 35 ppt salinity, the published lower limit is 0.5 mg/L as nitrite.
These are ion concentrations, not mg/L as nitrogen. Check performance at the values relevant to your application.
Assess solids, colour, salinity, temperature and the sample route. Aeration-basin applications need suitable preparation, such as a settling device.
Mobile and in-process NOx-monitrix models have separate specifications. Confirm the model and its operating requirements.
Mobile can run as frequently as every 15 minutes. Select a schedule that captures the expected change, and allow for transport and analysis time.
Specify control-system communications or Datamonitrix remote access as part of the installation.
Plan inlet inspection, cleaning, consumable replenishment and servicing. Use appropriate independent sample checks within your operating procedures.
PMA can help assess the application and define a practical support arrangement.
Technical references: NOx-monitrix Mobile and in-process NOx-monitrix.
In a 2022 case study, Aquamonitrix describes a water utility using separate nitrate and nitrite analysis during a drinking-water investigation. Online results were compared with laboratory measurements to support the wider response.
The useful distinction was direct nitrite measurement. The treatment review, collected samples and decisions by the responsible authority remained part of the investigation.
This historical manufacturer case illustrates an application, rather than a guarantee of the same outcome at another site.
Share the water matrix, expected nitrite levels and reporting units, salinity, solids and temperature. Include the proposed sample point, treatment context, available utilities and the alarms or records your team needs.
PMA can review the analyser model, sample preparation and data arrangements with you.
No. Aquamonitrix separates the ions and measures nitrite directly by UV detection. The nitrate concentration is reported separately.
Check the published range for your matrix. Mobile’s stated lower nitrite limit is 0.05 mg/L in freshwater/wastewater and 0.5 mg/L at 35 ppt salinity, expressed as nitrite ion. Confirm suitability against the levels you need to measure.
An automated analyser provides a useful frequent record. Its role should be defined within your site’s sampling, verification, treatment and reporting procedures, including independent checks where required.
Explore the complete Aquamonitrix overview, applications, technical details and resources.
Plan nitrate measurement in rivers, source water and treatment processes.
Speak to the PMA team about your instruments, reagents or service requirements. Tell us what you need, and we’ll help you find the right next step.
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