Methods
GB
Si Lr
Tablet
Powder
Zero
Test
Si Lr
Tablet
Powder
0.0.0
Tablet
Powder
Zero
Test
Si Lr
Tablet
Powder
RESULT
Tablet
Powder
30
Silica LR with VARIO Powder Pack
and liquid reagent
0.1 – 1.6 mg/l SiO
Use two clean vials (24 mm Ø) and mark one as blank for zeroing.
Fill each vial with 10 ml of water sample.
Add 14 drops of VARIO Molybdate 3 reagent solution into each
vial (Note 5).
Close the vials tightly with the caps and invert several times to mix the
contents (Note 1).
Wait for a reaction period of 4 minutes (Note 2).
After the reaction period is finished proceed as follows:
Add the contents of one VARIO Silica Citric Acid F10 Powder Pack
straight from the foil into each vial.
Close the vial tightly with the cap and swirl several times to dissolve
the powder.
Wait for a reaction period of 1 minute (Note 3).
After the reaction period is finished proceed as follows:
Place the vial (the blank) in the sample chamber making sure that
the
marks are aligned.
Add the contents of one VARIO LR Silica Amino Acid F F10 Powder
Pack straight from the foil into the vial (the sample).
Close the vial tightly with the cap and swirl several times to dissolve
the powder.
Wait for a reaction period of 2 minutes.
Press the [ZERO/TEST] key (blank is already placed in the sample
chamber).
The method symbol flashes for approx. 8 seconds.
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 in mg/l Silica.
Tolerance: ± 0.1 mg/l SiO
2
2
MD100_8 07/2016