Appendix
TARAtec 9/10
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14
Appendix
Recommended titration procedure
For the determination of hydrogen peroxide (H
2
O
2
), only the 1st titration
stage need to be performed.
For the determination of peracetic acid (PAA) the 1st and 2nd titration
stages need to be performed.
Procedure:
The titration must be performed quickly.
After the first addition of potassium permanganate it may take a few
seconds before the sample shows colour.
Renewed colouration of the sample after completion of the 2nd
titration stage is disregarded.
In the 1st titration stage, take care to avoid a large excess of
potassium permanganate (intense violet colouration of the sample).
In the 2nd titration stage the potassium permanganate will be
codetermined as peracetic acid and thus falsifies the results.
