Chlorite Testing

Chlorite is a disinfection by product generally caused by the breakdown of sodium hypochlorite or chlorine dioxide disinfectants.

Removal of chlorite is of particular concern as chlorine is often added downstream of the water treatment plant which can generate chlorate. Chlorate is difficult to remove and remains in the water for a long time.

  • Drinking water – Chlorite in drinking water is a regulated contaminant in many countries.  The USEPA stipulates a maximum of 1mg/L is permitted in water destined for public consumption whilst the WHO gives a guideline value of 0.7 mg/L.
  • Food and beverage – Chlorite and chlorate residues may occur from chlorine-based disinfectants in the wash water.  Chlorite must be monitored in the brewing process, especially when chlorine dioxide is used as a disinfectant on the production surfaces and equipment.
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ClO2

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