What is Sulfite measured for?

Sulfite (SO₃²-) is used in water treatment as an oxygen binding agent to prevent corrosion
in steam boilers, heating systems and closed cooling systems. As a reducing agent
, Sulfite reacts with dissolved oxygen and thus protects pipelines and system components from
oxygen corrosion.

The optimum Sulfite concentration in boiler water is 20-30 mg/l SO₃²-.
Regular monitoring is essential, as values that are too low do not provide sufficient corrosion protection
, while concentrations that are too high are uneconomical and promote the formation of Sulfite.

Sulfite is also used as a preservative and antioxidant in the food industry.
Monitoring the concentration of sulfite is therefore of great importance in various industrial sectors.

How does the test set work?

The CALDUR® Sulfite Test Set – Colorimetric is based on the proven thiobenzoic acid method.
After adding two reagents to the water sample, a
characteristic color develops within 3 minutes, the intensity of which is proportional to the Sulfite concentration.

The measured value is determined by direct color comparison with a supplied 6-level color chart.
Optionally, the sample can also be evaluated photometrically with the WINLAB Data Line photometer.

Advantages of the CALDUR® test set

• Quick analysis in just 3 minutes

  Ideal for regular checks in boiler systems – immediate results on site

• Wide measuring range from 0.5 to 20 mg/l SO₃²-

  Covers the entire practical range for boiler water and industrial applications

• 150 provisions per set – economical in continuous use

  Cost-efficient for daily checks in power plants, heating systems and industrial operations

• Can be used colorimetrically and optionally photometrically

  Flexible for simple on-site tests or precise laboratory analyses with photometer

• Easy handling without special equipment

  No additional technology required – ideal for quick routine checks

• Robust, waterproof plastic housing with hinged lid

  Safe transportation and protection of reagents – durable and reliable even under harsh conditions

Der Beitrag Caldur® Sulfite – Colorimetric erschien zuerst auf RLS Wacon analytics.