Lovibond Maxi Direct, Инструкция по эксплуатации, Страница: 22 / 268

20 MaxiDirect_2c 03/2010
1.1 Methods
Aluminium
with Vario Powder Pack
0.01 – 0.25 mg/l Al
Use two clean vials (24 mm Ø) and mark one as blank
for zeroing.
1. Fill 20 ml of the water sample in a 100 ml beaker.
2. Add the contents of one Vario Aluminum ECR F20
Powder Pack straight from the foil to the water sample.
3. Dissolve the powder using a clean stirring rod.
4. Press [ ] key.
Wait for a
reaction period of 30 seconds.
After the reaction period is finished proceed as follows:
5. Add the contents of
one Vario Hexamine F20 Powder
Pack straight from the foil to the same water sample.
6. Dissolve the powder using a clean stirring rod.
7. Add 1 drop of Vario Aluminum ECR Masking
Reagent in the vial marked as blank.
8. Add 10 ml of the prepared water sample to the vial (this
is the blank).
9. Add the remaining 10 ml of the prepared water sample
in the second clean vial (this is the sample).
10. Close the vials tightly with the caps and swirl several
times to mix the contents.
11. Press
[ ]
key.
Wait for a reaction period of 5 minutes .
Countdown 1
0:30
start:
Countdown 2
5:00
start:
1 2
3 4
5
0