Reflectoquant® Peroxide Test Strips, Catalog No. 16974/1
Peroxidase transfers peroxide oxygen to an
organic redox indicator. This produces a blue oxidation product, the
concentration of which is determined reflectometrically.
2. Measuring Range and Number of Determinations
||Number of Determinations
|0.2 - 20.0 mg/l H2O2
1) for measurement of concentrations
>20.0mg/l H2O2 see section 6
This test is suited for the determination of
inorganic peroxides in aqueous solutions.
Disinfectant and rinsing solutions (all types of
hospital laboratories and private medical laboratories, food
Swimming pool water
4. Influence of Foreign Substances
This was checked - in the case of interfering
ions up to concentrations of 1,000 mg/l - in solutions containing 15
mg/l and 0 mg/l H2O2. The concentrations of
foreign substances given in the table lie below the limit at which the
determination is interfered with:
Concentrations of Foreign Substances in mg/l
||Free chlorine (hypochlorite)|
|Bound chlorine (chloramine T)
5. Reagents and Auxiliaries
Store originally sealed pack in
refrigerator. Opened pack: store closed tube outside refrigerator in
a cool and dry place. The analytic test strips are stable at least
up to the date stated on the pack when stored in these conditions.
Tube containing 50 analytical test strips
Bar code strip
EM Quant® Peroxide Test, Cat.
No. 10011, measuring range 5-25 mg/l H2O2
Check whether the peroxide content is within the
measuring range. Use the EM Quant® Peroxide Test as a
guide. Samples containing more than 20.0 mg/l H2O2
must be diluted with distilled water.
· Observe the instructions for the RQflex
The following applies to the peroxide test:
Measurement procedure A. Stored reaction
time: 15 sec.
- Remove 1 analytical test strip and immediately
reclose the tube.
- Press START button of the reflectometer and
at the same time immerse both reaction zones of the test
strip in the sample solution (15-30°C) for approx. 2 sec.
- Shake off excess liquid from the test strip
- As soon as the beeper sounds (5 sec. before
end of reaction time), insert the test strip all the way into the
strip adapter with the reaction zones facing the display.
- Read off the result from the display. The
result is automatically stored.
- If the test strip is inserted into the
adapter after the reaction time has expired, renewed depression of
the START button may produce a false result
- At the end of each workday, cleanse the
strip adapter thoroughly with water or ethanol.
8. Method Control
To check analytical test strips, equipment and
Make up a 10ml Perhydrol® 30% H2O2
(= 300,000mg/l H2O2) to 1L with distilled water
and mix. Take 1ml of this solution, make up to 500ml with distilled water,
and mix. Analyze the latter solution immediately (solution is not stable!)
as described in section 7. The content of H2O2 determined
should be 6mg/l.