Thermo Scientific AQUAfast AQ3700, User Manual

Page: 28 / 264

2 Thermo Scientific Orion AQUAfast AQ3700 Colorimeter User Guide
1.1 Methods
Ammonia LR
with Tube Test
0.02 – 2.5 mg/l N
Insert the adapter for 16 mm Ø vials.
1. Open one white capped reaction vial and add 2 ml
deionized water (this is the blank).
2. Open another white capped reaction vial and add
2 ml of the water sample (this is the sample).
3. Add the contents of one Ammonia Salicylate
F5 Powder Pack straight from the foil into each vial.
4. Add the contents of one Ammonia Cyanurate
F5 Powder Pack straight from the foil into each vial.
5. Close the vials tightly with the caps and swirl several
times to dissolve the powder.
6. Press [ ] key.
Wait for a reaction period of 20 minutes .
After the reaction period is finished proceed as follows:
7. Place the vial (the blank) in the sample chamber making
sure that the marks are
l
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
l
aligned.
11. Press
TEST
key.
The result is shown in the display in mg/l Ammonia as N.
prepare Zero
press ZERO
Zero accepted
prepare Test
press TEST
Countdown 1
20:00
start:
1 2
3 4
Ø 16 mm
6 5