Thermo Scientific AQUAfast AQ3700, User Manual

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7 Thermo Scientific Orion AQUAfast AQ3700 Colorimeter User Guide
1.1 Methods
Silica LR / Silicon dioxide LR
with Powder Pack
and Liquid Reagent
0.1 – 1.6 mg/l SiO
2
Use two clean vials (24 mm Ø) and mark one as blank for
zeroing.
1. Fill each vial with
10 ml of the water sample
.
2. Add
0.5 ml Molybdate 3 reagent solution
into each
vial.
3. Close the vials tightly with the caps and swirl several
times to mix the contents (Note 1).
4. Press
[ ]
key.
Wait for a
reaction period of 4 minutes
(Note 2).
After the reaction period is finished proceed as follows:
5. Add the contents of one Silica Citric Acid F10 Powder
Pack straight from the foil into each vial.
6. Close the vials tightly with the caps and swirl several
times to mix the contents.
7. Press [ ] key.
Wait for a
reaction period of 1 minute
(Note 3).
After the reaction period is finished proceed as follows:
8. Place the vial (the blank) in the sample chamber making
sure that the marks are aligned.
9. Add the contents of
one Silica LR Amino Acid F F10
Powder Pack straight from the foil into the vial (the
sample).
10. Close the vial tightly with the cap and swirl several times
to mix the contents.
Countdown
4:00
start:
Countdown
1:00
start:
1 2
3 4
5
1
3