PrimeLab 1.0 MULTITEST, User Manual

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109 109
Tablet
Continued...
(24)
Hydrogen Peroxide (LR)
Name on device: 24-Hydr-Per-LR-tab
Note(s)
-> If the measuring water contains further reducing chemicals (e.g. chlorine,
active oxygen, bromine etc.) this will also be detected and is part of the
result.
-> When preparing the measurement procedure it is important to avoid any
Hydrogen Peroxide escaping, which can happen during pipetting and
shaking the sample. The measurement should be performed directly after
sampling.
-> It is important that the measurement devices to be used have not been
cleaned with household detergent, as this could greatly reduce the
measurement. To prevent any contamination the cuvette, the cuvette lid and
the stirrer should be stored in a 0.1 g/l sodium hypochlorite solution for one
hour and then thoroughly rinsed with distilled water.
-> The reagent used in this procedure buffers the pH value of the sample water
in the range between 6.2 and 6.5 pH. If your sample water is very alkaline
or acidic this must be adjusted to a pH range between 6 and 7 by the
addition of 0.5 mol/l sulphuric acid or resp. 1 mol/l caustic soda before the
reagent is added.
-> Water values outside the above measurement range defined for this
parameter and this measurement procedure / this reagent can lead to
incorrect measurements. For the measurement of higher hyd. peroxide
values please select the respective matching procedure.
0 - 3.8 (H O )
2 2
mg/l