Compliance With Guidelines And Standards; Appendix; Titration Procedure - ProMinent DULCOTEST PAA 1-mA-200 ppm Operating Instructions Manual

Declaration of compliance The measuring cells for peracetic acid PAA have been developed
1. Titration stage (H
Equipment required Sample water 20 ml
ProMinent ®
Compliance with guidelines and standards / Appendix
16 Compliance with guidelines and
standards
and tested in compliance with current European guidelines and
standards. Production is subject to a high quality standard, which
is ensured by means of European standards and guidelines.
A corresponding declaration of compliance can be obtained from
ProMinent.

Appendix

Titration procedure

Titration to determine the concentration of H
is done in 2 stages.
O )
2 2
Permanganate solution (e.g. 0.1 N)
Sulphuric acid (25 %)
Manganese sulphate solution (1 %)
Place approx 10 ml sulphuric acid (25 %) in 20 ml of sample
water.
Then titrate with permanganate solution (e.g. 0.1 N)
NOTE
After the first addition of permanganate solution, it may take
several seconds for the sample to discolour. You can accelerate
this change in reaction by adding 5 drops of manganese
sulphate solution (1 %).
Continue to add permanganate solution until the sample
stays pale pink in colour.
IMPORTANT
It is essential that you avoid large excesses of permanganate
(which turns the sample purple)!
In the second stage of titration the permanganate would be
taken as being peracetic acid and thus would distort the result!
Note the consumption A of permanganate solution (in ml).
O and peracetic acid
2 2
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