Caldur® Sulfate 20 mg – Titrimetric
Determination of sulphate in water by precipitation titration (20 mg/l SO₄²- per drop)
Private customers can also find our range in our partner store Ampha-Analyse.
Reagent for Caldur® Sulfate 20 mg – Titrimetric:
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CALDUR® Sulfate 20 mg test set – Titrimetric
What is sulfate measured for?
Sulphate (SO₄²-) is a naturally occurring anion in many bodies of water and mainly comes from the weathering of sulphate-containing minerals such as gypsum (CaSO₄) and anhydrite. In industrial processes, sulphate also enters the water through wastewater, cooling towers and chemical production processes.
The limit value for sulphate in drinking water is 250 mg/l (Drinking Water Ordinance). Elevated sulphate concentrations can have a deleterious effect and impair the taste of the water. Sulphate monitoring is particularly important in industry, as high concentrations can lead to corrosion of concrete structures and pipelines.
This test kit with a resolution of 20 mg/l SO₄²- per drop is optimized for higher concentrations and enables rapid determination in samples with elevated sulfate content.
How does the test set work?
The CALDUR® Sulfate 20 mg test kit works according to the principle of precipitation titration. A reagent is first added to the water sample. The titration solution is then added drop by drop until a color change indicates the end point.
Measuring principle: Barium ions from the titration solution react with sulphate ions and form poorly soluble barium sulphate. The end point is indicated by a Reagent. Each drop corresponds to 20 mg/l SO₄²-.
Calculation: Number of drops × 20 = sulphate concentration in mg/l.
Advantages of the CALDUR® test set
- Quick analysis in just 2 minutes
Efficient on-site determination without laboratory equipment
- Measured value 20 mg/l SO₄²- per drop
Larger measuring range for higher concentrations
- 30 provisions per set
Economical for regular monitoring
- Proven precipitation titration
Reliable and reproducible results
- Faster titration at high concentrations
Fewer drops required than with the 10 mg test set
Areas of application
Carrying out the measurement:
- Fill the water sample into the test tube up to the mark
- Add reagent and mix
- Add titration solution drop by drop and mix after each drop
- Count drops until color change
- Calculation: Number of drops × 20 = mg/l SO₄²-
Tip for best results
Slowly add the titration solution drop by drop and mix thoroughly after each drop. If the sulphate concentration is very high, the sample can be diluted to reduce the consumption of titration solution.
Important notes
- Slowly add titration solution drop by drop
- Mix thoroughly after each drop
- Thoroughly rinse the test tube with the sample before each measurement
- For very high concentrations: Dilute the sample and multiply the result by the dilution factor
Measuring range
| Property | Value |
|---|---|
| Measured value per drop | 20 mg/l SO₄²- |
| Measuring range | From 20 mg/l (by drop counting) |
Number of drops × 20 = sulphate concentration in mg/l.
Example: 5 drops × 20 = 100 mg/l SO₄²-.
Number of possible destinations
With a CALDUR® Test Set Sulfate 20 mg you can carry out approx. 30 measurements.
Measuring accuracy and reproducibility
Readability: ± 20 mg/l (per drop)
Reproducibility: Very good if the application instructions are followed
Interference: Interference can occur with extremely high concentrations of foreign ions. In this case, pre-treatment of the sample is recommended.
Specifications at a glance
| Property | Value |
|---|---|
| Parameters | Sulphate (SO₄²-) |
| Item number | 31-071580 |
| Method | Titrimetric (precipitation titration) |
| Measuring principle | Drop counting up to the color change |
| Measured value per drop | 20 mg/l SO₄²- |
| Analysis time | 2 minutes |
| Number of provisions | approx. 30 |
| Reagents | 2 (1 reagent, 1 titration solution) |
| Packaging | Hinged lid box |
| Packaging size | 103 x 91 x 36 mm |
Scope of delivery
| Reagent | Dropper bottle (shelf life 24M) |
| Titration solution | Dropper bottle (shelf life 24M) |
| Test tubes | With markings |
| Operating instructions | DE/EN |
Additional information
| Packaging | Hinged lid box, Refill pack |
|---|
Flyer
Operating instructions
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