1.1 Methods
Chloramine (Mono) and Free
Ammonia
with Vario Powder Pack
and Liquid Reagent
0.04 – 4.50 mg/l Cl
2
0.01 – 0.50 mg/l NH
4
-N
Use two clean vials (24 mm Ø) and mark one as the
chloramine vial, the other as the ammonia vial.
1. Fill both vials (24 mm Ø) with 10 ml of water sample,
close tightly with the cap.
2. Place the chloramine vial in the sample chamber making
sure that the
marks are aligned.
3. Press ZERO key.
4. Remove the vial from the sample chamber.
5. Add the contents of one Vario Monochlor F RGT
Powder Pack straight from the foil into the chloramine
vial.
6. Close the vial tightly with the cap and swirl several times
to mix the contents (approx. 20 seconds).
7. Add 1 drop of Vario Free Ammonia Reagent Solu-
tion into the ammonia vial (Note 1).
8. Close the vial tightly with the cap and invert several
times to mix the contents.
9. Place the chloramine vial in the sample chamber making
sure that the
marks are aligned.
10. Press TEST key.
Wait for a reaction period of 5 minutes.
After the reaction period is finished the measurement
starts automatically.
11. Remove the vial from the sample chamber.
12. Add the contents of one Vario Monochlor F RGT
Powder Pack straight from the foil into the ammonia
vial.
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