ORBECO SP600, Instruction Manual, Page: 32 / 334

30 SP600 Spectrophotometer 01/2008
1.1 Methods
Ammonium HR
with Tube Test
1 – 50 mg/l N
1. Open one white capped reaction vial and add 0.1 ml
deionized water (this is the blank).
2. Open another white capped reaction vial and add
0.1 ml of water sample (this is the sample).
3. Add one Vario AMMONIA Salicylate F5 powder
pack straight from the foil into each vial.
4. Add one Vario AMMONIA Cyanurate F5 powder
pack straight from the foil into each vial.
5. Close the vials tightly and swirl several times to dissolve
the powder.
6. Press
[ ] key.
Wait for a reaction period of 20 minutes .
After reaction period is finished proceed as follows:
7. Place the vial (the blank) in the sample chamber making
sure that the marks are aligned.
8. Press ZERO key.
9. Remove the vial from the sample chamber.
10. Place the vial (the sample) in the sample chamber
making sure that the marks are aligned.
11. Press TEST key.
The result is shown in the display in mg/l Ammonium.
prepare Zero
press ZERO
Zero accepted
prepare Test
press TEST
Countdown
20:00
start:
1 2
3 4
Ø 16 mm
6 6