YSI 9300 Photometer - Manual (Page 70)

Test Procedure
1 Fill test tube with sample to the 10 ml mark.
2 Add one Acidifying PT tablet and one Hydrogen Peroxide HR tablet. Crush
tablets and mix to dissolve.
3 Select Phot 17 on photometer.
4 Take photometer reading in usual manner (see photometer instructions).
5 The result is displayed as mg/l H
2
O
2
.
Notes
1 The sample should be free of other oxidizing agents such as chlorine,
bromine etc. as these react in a similar manner and will interfere with the
test. It is unlikely that these oxidizing agents will be used in conjunction with
hydrogen peroxide and, under normal circumstances, will not usually coexist
in solution.
2 For measuring low levels of hydrogen peroxide, use the YSI Hydrogen
Peroxide LR test (see PHOT.16.).
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