Spectroquant Pharo 300 - Page 401

Add 1 level grey micro-
spoon each of SO
3
-1K
into two reaction cells,
close with the screw cap.
Add 7.0 ml of the sample
with pipette to one reac-
tion cell, close with the
screw cap, and mix.
Reaction time:
2 minutes
114394
Cell Test
Sulfite
Shake both cells vigor-
ously to dissolve the
solid substance.
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.
Release
06/2014 - Spectroquant
®
UV/VIS Spectrophotometer Pharo 300
Measuring range: 0.05 – 3.00 mg/l SO
3
Select method
SO
3
sens in the menu
(method no. 127).
Add 7.0 ml of distilled
water with pipette to the
second reaction cell,
close with the screw cap,
and mix.
(Blank)
Transfer both solutions
into two separate 50-mm
cells.
Place the blank cell into
the cell compartment.
Place the cell containing
the sample
into the cell
compartment.