GB
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.
Fill 20 ml of the water sample in a 100 ml beaker.
Add the contents of one VARIO Aluminum ECR F20 Powder Pack
straight from the foil to the water sample.
Dissolve the powder using a clean stirring rod.
Wait for a reaction period of 30 seconds.
After the reaction period is finished proceed as follows:
Add
the contents of
one VARIO Hexamine F20 Powder Pack straight
from the foil to the same water sample.
Dissolve the powder using a clean stirring rod.
Add 1 drop of VARIO Aluminum ECR Masking Reagent in the vial
marked as blank.
Add 10 ml of the prepared water sample to the vial (this is the blank).
Add the remaining 10 ml of the prepared water sample in the second
clean vial (this is the sample).
Close the vials tightly with the caps and invert several times to mix
the contents.
Place the vial (the blank) in the sample chamber making sure that
the marks are aligned.
Wait for a reaction period of 5 minutes.
Press the [ZERO/TEST] key.
The method symbol flashes for approx. 8 seconds.
The display shows:
Remove the vial from the sample chamber.
Place the vial (the sample) in the sample chamber making sure that
the
marks are aligned.
Press the [ZERO/TEST] key.
The method symbol flashes for approx. 3 seconds.
The result is shown in the display as mg/l Aluminium.
0.0.0
RESULT
AL
AL
Zero
Test
Zero
Test
AL
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