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Ozone
Range
O
: 0.01 – 3 mg/l
3
Wavelength – 530 nm
Method - DPD
Ozone
1 Rinse test tube with sample leaving two or three
drops in the tube.
2 Add one DPD No 4 tablet, crush the tablet with the
crushing rod and then fill the test tube with sample
to the 10 ml mark. Mix gently with the rod to
dissolve the tablet and ensure any remaining
particles have settled.
3 Take photometer reading immediately as the
result may drift on standing.
shows the test range that you desire.
Reagents
AP 056 - DPD No 4 Tablets
Ensure the display
12
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