7.19 How is estimated quantitatively?
A quantitative method for estimating O3 gas is:
When we reacts with an excess of potassium iodide solution which is buffered with a borate buffer (pH 9.2), iodine is released which can be then titrated against a standard solution of sodium thiosulphate.
we use starch as an indicator when liberated is titrated against a standard solution of sodium thiosulphate.