Caldur® Peroxide – Colorimetric
Determination of peroxide in water using a color chart (1.0-10 mg/l H₂O₂)
Private customers can also find our range in our partner store Ampha-Analyse.
Reagent for Caldur® Peroxide – Colorimetric:
See also:
CALDUR® Peroxide Test Set – Colorimetric
What is peroxide measured for?
Hydrogen peroxide (H₂O₂) is used in a variety of ways in water treatment: for disinfection, oxidation of organic impurities and as a dechlorination agent. The correct dosage is crucial – too little H₂O₂₂ is ineffective, too much can corrode materials and increase costs.
Hydrogen peroxide is increasingly being used as a chlorine-free disinfection alternative in swimming pools and whirlpools. Typical target values are 30-50 mg/l.
In industrial water treatment, H₂O₂ is used to remove chlorine, sulphide and other undesirable substances. Regular monitoring ensures that the dosage is optimal.
How does the test set work?
The CALDUR® Peroxide Test Set – Colorimetric is based on the titanyl sulphate method. Hydrogen peroxide reacts with titanyl sulphate to form a yellow-orange peroxotitanyl complex. The color intensity is proportional to the H₂O₂ concentration.
The measured value is determined by direct color comparison with a 6-stage color chart supplied.
Advantages of the CALDUR® test set
- Measuring range 1.0 – 10 mg/l H₂O₂
Covers the practical dosing range
- 150 provisions per set
Economical for regular checks
- Quick analysis in just 5 minutes
Immediate results on site
- Easy handling with only 1 reagent
No measuring devices required
- Robust plastic housing with hinged lid
Safe transportation and protection of reagents
Areas of application
Carrying out the measurement:
- Fill water sample into test tube up to the 10 ml mark
- Add 5 drops of titanyl sulphate reagent
- Close the test tubes and mix well
- Wait for 5 minutes reaction time
- Perform color comparison with color chart
Tip for best results
The sample should be measured as fresh as possible, as hydrogen peroxide is unstable and decomposes over time. Heat, light and impurities accelerate the decomposition.
For swimming pool water with higher H₂O₂ concentrations (30-50 mg/l), the sample must be diluted accordingly.
Important notes
- Measure the sample immediately after taking it – H₂O₂ decomposes quickly
- Adhere exactly to the response time of 5 minutes
- Avoid direct sunlight during the measurement
- Rinse test tubes thoroughly with the sample before each measurement
- Reagent contains sulphuric acid – avoid skin contact
Measuring range
| Measuring level | Description |
|---|---|
| 1.0 mg/l | Very low concentration (weak yellow) |
| 2.0 mg/l | Low concentration (light yellow) |
| 3.0 mg/l | Average concentration (yellow) |
| 5.0 mg/l | Increased concentration (strong yellow) |
| 8.0 mg/l | High concentration (yellow-orange) |
| 10.0 mg/l | Very high concentration (intense orange) |
If the color is between two fields, you can form the mean value
(e.g. between 3.0 and 5.0 mg/l = approx. 4.0 mg/l).
Number of possible provisions
You can carry out 150 measurements with one CALDUR® test set peroxide.
This refers to the amount of reagent contained.
Measuring accuracy and reproducibility
Readability: ± 1 color level
Reproducibility: Very good if the application instructions are followed
Interference: Chromium(VI) and vanadate can increase the measured value. Strongly colored or cloudy samples can make color readings more difficult.
What to do if measured values are out of range?
Measured value > 10 mg/l
| Dilution | Procedure | Calculation of the measured value |
|---|---|---|
| 1:4 | 2 ml sample + 8 ml peroxide-free water | Measured value × 5 |
| 1:9 | 1 ml sample + 9 ml peroxide-free water | Measured value × 10 |
Measured value < 1.0 mg/l
Measured value is below the detection limit of this test kit.
Specifications at a glance
| Property | Value |
|---|---|
| Parameters | Hydrogen peroxide (H₂O₂) |
| Item number | 31-072440 |
| Method | Colorimetric (titanyl sulfate) |
| Measuring principle | Color comparison with 6-stage color chart |
| Measuring range | 1.0 to 10 mg/l H₂O₂ |
| Color scale | 6 measuring levels (1.0 / 2.0 / 3.0 / 5.0 / 8.0 / 10.0 mg/l) |
| Duration of analysis | 5 minutes |
| Number of provisions | 150 |
| Number of reagents | 1 (2 bottles) |
| Packaging | Hinged lid box |
| Packaging size | 103 x 91 x 36 mm |
| weight | approx. 140 g |
| Scope of delivery |
|---|
| 2 reagent bottles (titanyl sulphate reagent) 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 |
|---|---|---|---|
| Titanyl sulphate reagent (bottle 1) | 30 ml | 24 months (24M) | Shake before use |
| Titanyl sulphate reagent (bottle 2) | 30 ml | 24 months (24M) | 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 away from direct sunlight.
Additional information
| Packaging | Hinged lid box, Refill pack |
|---|
Flyer
Operating instructions
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