Spectroquant Pharo 300 - Page 314

Shake the test tube vig-
orously to dissolve the
solid substance.
Pipette 2.0 ml of F-1 into
a test tube.
Add 5.0 ml of the
sample with pipette and
mix.
Add 1 level blue micro-
spoon of F-2 and mix.
Measuring range: 0.10 – 2.00 mg/l F 10-mm cell
1.0 – 20.0 mg/l F 10-mm cell
Expression of results also possible in mmol/l.
Reaction time:
5 minutes
Transfer the solution into
a cell.
Select method with
AutoSelector measuring
range 0.10 – 2.00 mg/l F.
Place the cell into the
cell compartment
.
Fluoride
114598
Test
Measuring range: 0.10 – 2.00 mg/l F
Pipette 2.0 ml of F-1 into
a test tube.
Add 5.0 ml of water and
0.5 ml of the sample
with pipette and mix.
Measuring range: 1.0 – 20.0 mg/l F
Important:
Very high fluoride concentrations in the sample produce
brown-colored solutions (measurement solution should be
violet) and false-lo
w readings are yielded. In such cases
the sample must be diluted (plausibility check).
Continue as mentioned above; starting
from the addition of F-2 (Fig. 4). Select
method with AutoSelector measuring
range 1.0 – 20.0 mg/l F.
Check the pH of the
sample, specified range:
pH 3 – 8.
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 3 – 8.
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
Quality assurance:
To check the measurement system (test reagents,
measurement device, and handling) ready-f
or-use
fluoride standard solution Certipur
®
, Cat.No. 119814,
concentration 1000 mg/l F
–
, can be used after diluting
accordingly.