A Titration Method for Standardization of Aqueous Sodium Chlorite Solutions Using Thiourea Dioxide

Area of Science:

• Environmental Chemistry
• Analytical Chemistry
• Water Treatment Technologies

Background:

• Accurate analysis of oxychlorine compounds is vital for effective water disinfection.
• Existing methods for chlorine dioxide (ClO2), chlorite (ClO2-), and chlorate (ClO3-) lack simplicity and specificity.
• There is a need for accessible quantification techniques for water treatment applications.

Purpose of the Study:

• To develop a simple, cost-effective titration method for determining chlorite (ClO2-) in water.
• To provide an alternative to complex standard methods requiring specialized equipment.
• To enhance quality assurance in water treatment through reliable chlorite analysis.

Main Methods:

• A titration-based approach using thioureadioxide (TUD) as a reducing agent.
• Chlorite is reduced by TUD, and the excess reductant is back-titrated with potassium permanganate (KMnO4).
• Quantification is achieved by measuring the consumption of TUD and observing a visual endpoint for excess KMnO4.

Main Results:

• The method allows for straightforward determination of chlorite concentrations in water.
• It utilizes commercially available and easy-to-handle reagents.
• The titration provides a clear visual endpoint for accurate measurement.

Conclusions:

• This simple titration method offers accurate and cost-effective chlorite determination.
• It is suitable for both field and laboratory applications in water treatment.
• The method has the potential to improve water quality assurance and resource management.