1.1 Methods
Ozone,
in the presence of Chlorine
with Tablet
0.02 – 2 mg/l O
3
1. Fill a clean vial (24 mm Ø) with 10 ml of the water
sample, close tightly with the cap.
2. Place the vial in the sample chamber making sure that
the
marks are aligned.
3. Press ZERO key.
4. Remove the vial from the sample chamber and empty it,
leaving a few drops remaining in the vial.
5. Add one DPD No. 1 tablet and one DPD No. 3 tablet
straight from the foil and crush the tablets using a clean
stirring rod.
6. Add water sample to the 10 ml mark.
7. Close the vial tightly with the cap and swirl several times
until the tablets are dissolved.
8. Place the vial in the sample chamber making sure that
the
marks are aligned.
9. Press TEST key.
Wait for a reaction period of 2 minutes.
After the reaction period is finished the measurement
starts automatically.
10. Remove the vial from the sample chamber, empty the
vial, rinse vial and cap several times. Fill the vial with a
few drops of the water sample.
11. Add one DPD No. 1 tablet and one DPD No. 3 tablet
straight from the foil and crush the tablets using a clean
stirring rod.
prepare Zero
press ZERO
Zero accepted
prepare T1
press TEST
Countdown
2:00
0
0
3
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