YSI 9300 Photometer - Manual (Page 68)

Test Procedure
1 Rinse test tube with sample leaving 2 to 3 drops of sample in the tube.
2 Add one Hydrogen Peroxide LR tablet, crush and then fill tube with sample to
the 10 ml mark. Mix to dissolve tablet.
3 Stand for two minutes to allow full color development.
4 Select Phot 16 on photometer.
5 Take photometer reading in usual manner (see photometer instructions).
6 The result is displayed as mg/l H
2
O
2
.
Notes
1 The sample should be free of other oxidising agents such as chlorine,
bromine, etc, as these react in a similar manner and will interfere with the
test. It is unlikely that these oxidising agents will be used in conjunction with
hydrogen peroxide and, under normal circumstances, will not usually coexist
in solution.
2 For measuring high levels of hydrogen peroxide used in industrial processes,
use the YSI Hydrogen Peroxide HR test (see PHOT.17.).
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