ORBECO SP600, Instruction Manual, Page: 204 / 334

202 SP600 Spectrophotometer 01/2008
1.1 Methods
Ozone, in the presence of Chlorine
with Tablet
0.02 – 1 mg/l O
3
1. Fill a clean vial (24 mm Ø) with
10 ml of the water
sample , close thightly 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, empty the
vial leaving a few drops in .
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 and then fill the vial
with
a 2-3 drops of 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
3 0 0