Caldur® Bromine – Colorimetric
Determination of bromine in water using a color chart (0.1-2.0 mg/l Br)
Private customers can also find our range in our partner store Ampha-Analyse.
Reagent for Caldur® Bromine – Colorimetric:
See also:
CALDUR® Bromine Test Set – Colorimetric
What is bromine measured for?
Bromine (Br) is used as an alternative to chlorine to disinfect water, especially in swimming pools, whirlpools and cooling water systems. Unlike chlorine, bromine remains effective even at higher temperatures and pH values, which is why it is particularly preferred in hot water applications.
Controlling the bromine concentration is important to ensure sufficient disinfection and at the same time avoid overdosing. Typical target values are between 2 and 4 mg/l in swimming pools and whirlpools.
Bromine is used in cooling water systems to prevent microbial growth and biofilm formation. Regular monitoring protects the systems from corrosion and deposits.
How does the test set work?
The CALDUR® Bromine Test Set – Colorimetric is based on the DPD method (diethyl-p-phenylenediamine). After adding two reagents to the water sample, a pink to violet coloration develops within 1 minute, the intensity of which is proportional to the bromine concentration.
The measured value is determined by direct color comparison with a 6-stage color chart supplied.
Advantages of the CALDUR® test set
- Quick analysis in just 1 minute
Ideal for regular checks in swimming pools and whirlpools
- Measuring range 0.1 to 2.0 mg/l Br
Covers the entire field of practical relevance
- 150 provisions per set
Cost-efficient for continuous use
- Proven DPD method
Reliable and reproducible results
- 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 3 drops of reagent B and mix
- Perform immediate color comparison with color chart (within 1 minute)
Tip for best results
The measurement should be carried out immediately after sampling, as bromine is more volatile than chlorine.
Avoid exposure to sunlight and do not heat the sample.
At high bromine concentrations, the color may fade again after the maximum (bleaching) – in this case, dilute the sample and measure again.
Important notes
- Measure the sample immediately after taking it – bromine volatilizes quickly
- Do not exceed the reaction time (max. 1 minute)
- Avoid direct sunlight during the measurement
- If the color fades: dilute the sample and measure again
- Thoroughly rinse the test tube with the sample before each measurement
Measuring range
| Measuring level | Description |
|---|---|
| 0.1 mg/l | Very low concentration (light pink) |
| 0.2 mg/l | Low concentration (pink) |
| 0.5 mg/l | Medium concentration (pink-violet) |
| 0.8 mg/l | Increased concentration (violet) |
| 1.0 mg/l | High concentration (dark violet) |
| 2.0 mg/l | Very high concentration (deep violet) |
If the color lies between two fields, you can form the mean value
(e.g. between 0.5 and 0.8 mg/l = approx. 0.6-0.7 mg/l).
Number of possible destinations
You can carry out 150 measurements with a CALDUR® Bromine 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: Chlorine and other oxidizing agents also react with DPD. If chlorine is present at the same time, the measured value is the sum of bromine and chlorine. Ozone can also influence the result.
What to do if measured values are out of range?
Measured value > 2.0 mg/l
| Verduction | Execution | Calculation of the measured value |
|---|---|---|
| 1:1 | 5 ml sample + 5 ml bromine-free water | Measured value × 2 |
| 1:4 | 2 ml sample + 8 ml bromine-free water | Measured value × 5 |
Measured value < 0.1 mg/l
Measured value is below the detection limit. A minimum concentration of 1.0 mg/l bromine should be present in swimming pools and whirlpools to ensure effective disinfection.
Specifications at a glance
Reagents (2 reagents)
| Property | Value |
|---|---|
| Parameters | Bromine (Br) |
| Item number | 31-072230 |
| Method | Colorimetric (DPD) |
| Measuring principle | Color comparison with 6-stage color chart |
| Measuring range | 0.1 to 2.0 mg/l Br |
| Color scale | 6 measuring levels (0.1 / 0.2 / 0.5 / 0.8 / 1.0 / 2.0 mg/l) |
| Analysis duration | 1 minute |
| Number of provisions | 150 |
| Number of reagents | 2 |
| Packaging | Hinged lid box |
| Packaging size | 103 x 91 x 36 mm |
| weight | approx. 150 g |
| Scope of delivery |
|---|
| 2 reagent bottles (reagent A, reagent B) 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 (DPD 1) | 30 ml | 24 months (24M) | DPD reagent, shake before use |
| Reagent B (buffer) | 10 ml | 24 months (24M) | Buffer solution, 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 |
|---|
Flyer
Operating instructions
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