ORBECO SP600, Инструкция по эксплуатации, Страница: 24 / 334

22 SP600 Spectrophotometer 01/2008
1.1 Methods
Aluminum
with 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 water sample
in a 100 ml beaker.
2. Add 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 reaction period is finished proceed as follows:
5. Add 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 Re-
agent
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 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