Millipore Spectroquant Multy Operating Manual page 92

Measuring range: 0.20 – 10.00 mg/l ClO
Check the pH of the Select method 1 4 1 .
sample, specified range:
pH 4 – 8.
If required, add dilute
sodium hydroxide
solution or sulfuric acid
drop by drop to adjust
the pH.
Reaction time: Add 1 level blue micro-
2 minutes spoon of ClO
Press Enter to start with the screw cap.
the countdown.
Insert the cell containing
the sample into the cell
compartment. Press
Test .
Important:
Very high chlorine dioxide concentrations in the sample
produce yellow-colored solutions (measurement solution
should be red) and false-low readings are yielded. In such
cases the sample must be diluted (plausibility check).
Release 08/2014 - Spectroquant
Chlorine Dioxide
16-mm cell
2
Fill approx. 10 ml of
distilled water into an
empty 16-mm cell (do
not add any reagents!),
close with the screw
cap.
(Blank cell)
Shake the cell vigor-
-2, close ously to dissolve the
2
solid substance.
®
Multy
Pipette 10 ml of the
sample into a 16-mm
cell.
Reaction time:
1 minute
Press Enter to start
the countdown.
Quality assurance:
To check the measurement system (test reagents, meas-
urement device, and handling) a freshly prepared standard
solution can be used (see section "Standard solutions").
100608
Test
Add 2 drops of ClO -1,
2
close with the screw
cap, and mix.
Insert the blank cell into
the cell compartment.
Press Zero .