CALDUR® Manganese – Colorimetric
Manganese determination in water by color chart (0.03-1.0 mg/l Mn)
Private customers can also find our range in our partner store Ampha-Analyse.
Reagent for CALDUR® Manganese – Colorimetric:
See also:
CALDUR® Manganese Test Set – Colorimetric
What is manganese measured for?
Manganese (Mn) is a naturally occurring heavy metal that is frequently found in groundwater and surface waters. The limit value for drinking water is 0.05 mg/l Mn (Drinking Water Ordinance).
Elevated manganese concentrations lead to black-brown deposits in pipes, discoloration of the water and a metallic taste. In waterworks, manganese must be reliably removed, as even low concentrations can lead to operational disruptions.
Manganese can cause deposits and corrosion in cooling water systems and industrial treatment. Regular monitoring is therefore essential.
How does the test set work?
The CALDUR® Manganese Test Set – Colorimetric is based on the formaldoxime method. After adding three reagents to the water sample, a colored complex is formed within 10 minutes, the intensity of which is proportional to the manganese concentration.
The measured value is determined by direct color comparison with a supplied color chart.
Advantages of the CALDUR® test set
- Sensitive measuring range 0.03 – 1.0 mg/l Mn
Already detects concentrations below the drinking water limit value
- 100 provisions per set
Economical for regular checks
- Proven formaldoxime method
Selective for manganese, low interference
- Easy handling with color card
Fast on-site determination without measuring devices
- Robust plastic housing with hinged lid
Safe transportation and protection of reagents
Areas of application
Carrying out the measurement:
- Fill water sample into test tubes up to the 10 ml mark
- Add 5 drops of reagent A and mix
- Add 5 drops of reagent B and mix
- Add 3 drops of reagent C and mix
- Wait for 10 minutes reaction time
- Perform color comparison with color chart
Tip for best results
The sample should be measured immediately after collection, as dissolved manganese(II) can be oxidized to manganese(IV) on contact with atmospheric oxygen and then precipitates as brown manganese oxide. Do not filter Truebe samples before measurement if the total manganese content is to be determined.
Important notes
- Measure the sample immediately after taking it – manganese oxidizes in the air
- Adhere exactly to the reaction time of 10 minutes
- Avoid direct sunlight during the measurement
- Iron >5 mg/l can interfere with the measurement
- Thoroughly rinse the test tube with the sample before each measurement
Measuring range
| Measuring level | Description |
|---|---|
| 0.03 mg/l | Very low concentration (pale yellow) |
| 0.05 mg/l | Drinking water limit value (light yellow) |
| 0.1 mg/l | Increased concentration (yellow) |
| 0.2 mg/l | Significantly increased concentration (strong yellow) |
| 0.5 mg/l | High concentration (yellow-orange) |
| 1.0 mg/l | Very high concentration (orange) |
If the color lies between two fields, you can form the mean value
(e.g. between 0.1 and 0.2 mg/l = approx. 0.15 mg/l).
Number of possible destinations
You can carry out 100 measurements with one CALDUR® Manganese Test Set.
This refers to the quantity of reagents contained.
Measuring accuracy and reproducibility
Readability: ± 1 color level
Reproducibility: Very good if the application instructions are followed
Interference: Iron in high concentrations (>5 mg/l) can influence the result. If samples are heavily colored (e.g. by humic substances), the color reading may be more difficult. In these cases, a photometric determination is recommended.
What to do if measured values are out of range?
Measured value > 1.0 mg/l
| Verduction | Execution | Calculation of the measured value |
|---|---|---|
| 1:1 | 5 ml sample + 5 ml manganese-free water | Measured value × 2 |
| 1:4 | 2 ml sample + 8 ml manganese-free water | Measured value × 5 |
Measured value < 0.03 mg/l
The measured value is below the detection limit. This is a good result for drinking water, as the limit value of 0.05 mg/l is safely adhered to.
Specifications at a glance
Reagents (3 reagents)
| Property | Value |
|---|---|
| Parameters | Manganese (Mn) |
| Item number | 31-072360 |
| Method | Colorimetric (formaldoxime) |
| Measuring principle | Color comparison with 6-stage color chart |
| Measuring range | 0.03 to 1.0 mg/l Mn |
| Color scale | 6 measuring levels (0.03 / 0.05 / 0.1 / 0.2 / 0.5 / 1.0 mg/l) |
| Duration of analysis | 10 minutes |
| Number of provisions | 100 |
| Number of reagents | 3 |
| Packaging | Hinged lid box |
| Packaging size | 103 x 91 x 36 mm |
| weight | approx. 170 g |
| Scope of delivery |
|---|
| 3 reagent bottles (reagent A, reagent B, reagent C) with detailed labeling |
| 1 test tube with 10 ml scale |
| 1 color card with 6 measuring levels |
| Detailed operating instructions (DE/EN) |
| Safety data sheets for all reagents |
| Robust hinged lid box (103 x 91 x 36 mm) |
Reagent details
| Reagent | Volume | Shelf life | Notes |
|---|---|---|---|
| Reagent A (Formaldoxime) | 30 ml | 24 months (24M) | Formaldoxime reagent, shake before use |
| Reagent B (buffer) | 15 ml | 24 months (24M) | Alkaline buffer solution |
| Reagent C (oxidizing agent) | 10 ml | 24 months (24M) | Oxidizing reagent, shake before use |
Shelf life: The shelf life starts from the date of manufacture (printed on the bottle).
After opening, the reagents should be used within 12 months.
Store the test kit in a dry, cool place (10-25°C) and protected from direct sunlight.
Additional information
| Packaging | Hinged lid box, Refill pack |
|---|---|
| Product category | Testset |
Flyer
Operating instructions
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