Thermo Scientific AQUAfast AQ3700, User Manual

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Thermo Scientific Orion AQUAfast AQ3700 Colorimeter User Guide
1.1 Methods
Chlorine, differentiated determination
with Liquid Reagent
0.02 – 4 mg/l Cl
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
the vial .
5. Fill the vial with drops of the same size by holding the
bottle vertically and squeeze slowly:
6 drops of DPD 1 buffer solution
2 drops of DPD 1 reagent solution
6. Add water sample to the 10 ml mark.
7. Close the vial tightly with the cap and swirl several times
to mix the contents.
8. Place the vial in the sample chamber making sure that
the marks are aligned.
9. Press TEST key.
10. Remove the vial from the sample chamber.
11. Add 3 drops of DPD 3 solution to the same water
sample.
12. Close the vial tightly with the cap and swirl several times
to mix the contents.
prepare Zero
press ZERO
Zero accepted
prepare T1
press TEST
0
1
1