MN nitrate/nitrite test strips
Simultaneous nitrate and nitrite determination with test strips (NO₃⁻ 0-500 mg/l, NO₂⁻ 0-80 mg/l)
Private customers can also find our range in our partner store Ampha-Analyse.
Reagent for MN nitrate/nitrite test strips:
See also:
MN nitrate/nitrite test strips
What are nitrate and nitrite measured for?
Nitrate (NO₃⁻) and nitrite (NO₂⁻) are important nitrogen compounds in water analysis. The limit value for nitrate in drinking water is 50 mg/l, for nitrite 0.5 mg/l (German Drinking Water Ordinance). Both parameters must be monitored regularly.
Nitrate enters groundwater and surface water mainly through agricultural fertilisation and wastewater. Elevated nitrate concentrations can be harmful to infants (methaemoglobinaemia) and indicate contamination of the water catchment area.
Nitrite is formed as an intermediate product in the bacterial conversion of ammonium to nitrate (nitrification) and is more toxic than nitrate. In drinking water pipes, nitrite can form due to stagnation and bacterial activity.
The MN nitrate/nitrite test strips determine both parameters simultaneously in a single measurement – ideal for a quick orientation test.
How do the test strips work?
The test strips have two separate reaction zones: one for nitrate and one for nitrite. Both zones change colour when dipped into the sample according to the respective concentration. By comparing the colour with the printed scale, both values are read off simultaneously.
Nitrate reading: Colour scale with steps 0 / 10 / 25 / 50 / 100 / 250 / 500 mg/l NO₃⁻.
Nitrite reading: Colour scale with steps 0 / 1 / 5 / 10 / 20 / 40 / 80 mg/l NO₂⁻.
Benefits of the MN test strips
- Determine two parameters at once
Nitrate AND nitrite in a single measurement – time-saving and practical
- Quick measurement in about 1 minute
Immediate results without reagents or instruments
- 100 determinations per tin
Particularly economical for regular checks
- Wide measuring range
Nitrate 0-500 mg/l, nitrite 0-80 mg/l – covers all practically relevant ranges
- No reagents required
No mixing, no drops, no waste
Application areas
Carrying out the measurement:
- Remove a test strip from the tin
- Dip the strip into the sample for about 1 second (both reaction zones must be wetted)
- Wait approx. 1 minute until the colours are stable
- Compare the nitrate zone with the nitrate colour scale
- Compare the nitrite zone with the nitrite colour scale
- Read off both values
Tip for best results
Make sure to wet both reaction zones completely. The nitrite zone usually reacts faster than the nitrate zone. Wait for the full reaction time before reading the result.
Important notes
- Close the tin again immediately after removal – avoid moisture
- Do not touch the reaction zones of the test strips with your fingers
- Store in a dry, cool place
- For nitrate above 50 mg/l or nitrite above 0.5 mg/l: re-check the sample with a more precise test set
- Do not use beyond the expiry date
Measuring range nitrate (NO₃⁻)
| Level | Description |
|---|---|
| 0 mg/l | Not detectable |
| 10 mg/l | Low concentration |
| 25 mg/l | Medium concentration |
| 50 mg/l | Drinking water limit (TrinkwV) |
| 100 mg/l | Elevated concentration |
| 250 mg/l | High concentration |
| 500 mg/l | Very high concentration |
Measuring range nitrite (NO₂⁻)
| Level | Description |
|---|---|
| 0 mg/l | Not detectable |
| 1 mg/l | Low concentration (limit TrinkwV: 0.5 mg/l) |
| 5 mg/l | Medium concentration |
| 10 mg/l | Elevated concentration |
| 20 mg/l | High concentration |
| 40 mg/l | Very high concentration |
| 80 mg/l | Extremely high concentration |
Number of possible determinations
Each tin contains 100 test strips for 100 simultaneous nitrate/nitrite measurements.
Measuring accuracy
Accuracy: semi-quantitative (± 1 colour level)
Note: For more precise individual determinations we recommend the MN nitrate or nitrite test sets (colorimetric or photometric).
Specifications at a glance
| Property | Value |
|---|---|
| Parameter | Nitrate (NO₃⁻) and nitrite (NO₂⁻) |
| Article number | 31-075220 |
| Method | Test strips (indicator paper) |
| Measuring range nitrate | 0 / 10 / 25 / 50 / 100 / 250 / 500 mg/l |
| Measuring range nitrite | 0 / 1 / 5 / 10 / 20 / 40 / 80 mg/l |
| Analysis time | approx. 1 minute |
| Number of determinations | 100 |
| Reagents | None (indicators impregnated on strip) |
| Packaging | Plastic tin |
Scope of delivery
| Test strips | 100 pieces in plastic tin (2 reaction zones per strip) |
| Colour scale | Printed on tin (nitrate + nitrite) |
Additional information
| Product category | Test kit |
|---|
Flyer
Operating instructions
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