Release 06/2014 - Spectroquant
®
UV/VIS Spectrophotometer Pharo 300
Add 1 level grey micro-
spoon of SO
3
-1K into a
reaction cell, close with
the screw cap.
Add 3.0 ml of the sample
with pipette, close the
cell with the screw cap,
and mix.
Reaction time:
2 minutes
114394
Cell Test
Measuring 1.0 – 20.0 mg/l SO
3
0.8 – 16.0 mg/l SO
2
Round cell
range: 0.05 – 3.00 mg/l SO
3
0.04 – 2.40 mg/l SO
2
50-mm cell
Expression of results also possible in mmol/l.
Sulfite
Shake the cell vigorous-
ly to dissolve the solid
substance.
Place the cell into the
cell compartment. Align
the mark on the cell with
that on the photometer.
Quality assurance:
To check the measurement system (test reagents,
measurement device, and handling) a sulfite standard
solution m
ust be prepared from sodium sulfite GR,
Cat.No. 106657 (see section “Standard solutions”).
Check the pH of the
sample, specified range
:
pH 4– 9.
If required, add dilute
sodium hydroxide
solution or sulfuric acid
drop by drop to adjust
the pH.
Measuring range: 1.0 – 20.0 mg/l SO
3
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