01 January 1970 4 3K Report

Hi everyone

I'm looking for a way to measure ozone concentrations in water.

The best method I have found is accurate and sensitive was the Indigo method, but unfortunately it is very expensive in our country due to the boycott.

Can I use a method that is suitable for low concentrations of ozone?

Can I make Potassium Indigo Trisulfonate Salt from Indigo or Indigo Carmine?

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