Determination of peracetic acid and hydrogen peroxide in the mixture

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major-bidi;mso-hansi-theme-font:major-bidi;mso-bidi-theme-font:major-bidi">Iodometric
and permanganometric titrations were used for determination of peracetic acid
and hydrogen peroxide (H2O2) in the mixture. Two procedures were described and
compared. Titrations could be done in only one vessel, in the same reaction
mixture, when iodometric titration of peracetic acid was continued after the
permanganometric titration of H2O2, (procedure A). Peracetic acid and H2O2, as
oxidizing agents, reacted with potassium iodide in an acid medium, evolving
iodine. This reaction was used for the quantitative iodometric determination of
total peroxyde in procedure B. H2O2 reacted with potassium permanganate in acid
medium, but peracetic acid did not react under the same conditions. That made
possible the selective permanganometric determination of H2O2 in the presence
of peracetic acid. The procedure B was performed in two titration vessels
(KV=3.4% for peracetic acid, 0.6% for H2O2). The procedure A for iodometric
determination of peracetic acid in one titration vessel after permanganometric
titration of H2O2 was recommended (KV=2,5% for peracetic acid, 0,45% for H2O2).