YSI 9300 Photometer - Manual (Page 69)

PHOTOMETER TEST INSTRUCTIONS
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Hydrogen peroxide is used as a bleach and oxidising agent in a number of
industrial processes. Applications include textile bleaching, commercial
laundering and paper manufacturing. It is important in such processes to control
the hydrogen peroxide level within the correct range so as to achieve the
desired bleaching or oxidising effect without causing damage to the goods
under treatment. Hydrogen Peroxide is also used in swimming pool water to
control algae and improve clarity.
The YSI Hydrogen Peroxide HR test provides a simple means of monitoring
hydrogen peroxide levels in water over the range 0 - 100 mg/l.
Method
Hydrogen peroxide reacts with potassium iodide under acid conditions to release
iodine which gives a yellow solution. A catalyst is used to speed up the rate of
reaction. In the YSI Hydrogen Peroxide HR test the reagents are provided in the
form of two tablets. The test is simply carried out by adding one of each tablet
to a sample of the water.
The intensity of the color produced in the test is proportional to the hydrogen
peroxide concentration and is measured using a YSI Photometer.
Reagents and Equipment
YSI Hydrogen Peroxide HR Tablets
YSI Acidifying PT Tablets
YSI 9300 or 9500 Photometer
Round Test Tubes, 10 ml glass (PT 595)
Photometer Method
AUTOMATIC
WAVELENGTH
SELECTION
0 – 100 mg/l
PHOT.17.AUTO