I am working with oxo-bridged species and before I perform iodometric titration, I want to know if hydrogen peroxide is present at all? Is there a quick way to test?
Dear Dr.Asmita !
the quick way to test presence of peroxide is to add freshly prepared iron(II) solution to test sample which will get oxidized to iron(III) and will immediately precipitate as orange yellow precipitate or coloration depending upon the level of iron(II) oxidation which in turn will depend upon concentration of peroxide in the test sample.
Another quick test can be decoloration of potassium permanganate however this test cannot be recommended because permanganate is a strong oxidising agent as well.
do not forget to up vote if problem solved
A quick test for any peroxide is to add a drop of the sample to a freshly prepared mixture of KI and acetic acid. Presence of peroxide will turn the mixture brown, due to iodine liberation from KI.
But what should be the concentration of KI and acetic acid? Everyone speak about it but no one has mentioned the conc. Could you please tell the conc. or how to prepare this solution? Thank you
Add 0.5 to 1.0 mL of the material to be tested to an equal volume of glacial acetic acid to which has been added 0.1 g of sodium iodide or potassium iodide. yellow colour = low peroxide concentration in sample brown colour = high peroxide concentration in sample Always prepare the iodide-acetic acid mixture at the time of the test to avoid false results due to oxidation. Source Wikieducator.org
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