Thermo Scientific AQUAfast AQ3700, User Manual

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Thermo Scientific Orion AQUAfast AQ3700 Colorimeter User Guide
1.1 Methods
Chlorine dioxide
in the presence of Chlorine
with Tablet
0.05 – 11 mg/l ClO
2
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 straight from the foil and
crush the tablet using a clean stirring rod.
6. Fill a second clean vial with 10 ml of the water
sample.
7. Add
one GLYCINE tablet
straight from the foil and
crush the tablet using a clean stirring rod.
8. Close the vial tightly with the cap and swirl several times
until the tablet is dissolved.
9. Transfer the contents of the second vial into the
prepared vial.
10. Close the vial tightly with the cap and swirl several times
until the tablet is dissolved.
11. Place the vial in the sample chamber making sure that
the marks are aligned.
12. Press
TEST
key.
Zero accepted
prepare T1
press TEST
prepare Zero
press ZERO
2
0
1