Spectroquant Pharo 300 - Page 385

Add 2.0 ml of Si-2 with
pipette and mix.
Pipette 4.0 ml of the
sample into a test tube.
Add 4 drops of Si-3
and mix.
Measuring 1.1– 107.0 mg/l SiO
2
0.5– 50.0 mg/l Si 10-mm cell
range: 11 – 1070 mg/l SiO
2
5 – 500 mg/l Si 10-mm cell
Expression of results also possible in mmol/l.
Silicate (Silicic Acid)
100857
Test
Add 4 drops of Si-1
and mix.
Continue as mentioned above;
starting from the addition
of Si-1 (Fig. 3). Select method
with AutoSelector measuring range
5 – 500 mg/l Si.
Pipette 5.0 ml of distilled
water (Water for analysis
EMSURE
®
, Cat.No.
116754, is recommend-
ed) into a test tube.
Add 0.50 ml of the
sample with pipette and
mix.
Transfer the solution into
a cell.
Select method with
AutoSelector measuring
range 0.5 – 50.0 mg/l Si.
Place the cell into the
cell compartment.
Quality assurance:
To check the measurement system (test reagents,
measurement device, and handling) ready-f
or-use silicon
standard solution Certipur
®
, Cat.No. 170236, concentra-
tion 1000 mg/l Si, can be used after diluting accordingly.
(Atten tion! Do not store standard solutions in glass
vessels - see section "Standard solutions"!)
Reaction time:
2 minutes
Reaction time:
2 minutes
Measuring range: 1.1 – 107.0 mg/l SiO
2
Measuring range: 11 – 1070 mg/l SiO
2
Check the pH of the
sample, specified range
:
pH 2– 10.
If required, add dilute
sodium hydroxide
solution or sulfuric acid
drop by drop to adjust
the pH.
Check the pH of the
sample, specified range
:
pH 2– 10.
If required, add dilute
sodium hydroxide
solution or sulfuric acid
drop by drop to adjust
the pH.
Release 06/2014 - Spectroquant
®
UV/VIS Spectrophotometer Pharo 300