Millipore Spectroquant Multy Operating Manual page 72

Measuring range: 0.05 – 5.00 mg/l Cl
Check the pH of the Select method 1 3 0 ,
sample, specified range: select subitem >>free.
pH 4 – 8.
If required, add dilute
sodium hydroxide
solution or sulfuric acid
drop by drop to adjust
the pH.
Shake the cell vigor- Reaction time:
ously to dissolve the 1 minute
solid substance. Press Enter to start
the countdown.
Important:
Very high chlorine 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
Determination of free chlorine
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)
Insert the blank cell into
the cell compartment.
Press Zero .
®
Multy
Pipette 5.0 ml of the
sample into a round cell.
Insert the cell containing
the sample into the cell
compartment. Align the
mark on the cell with
that on the photometer.
Press Test .
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").
100597
Cell Test
Add 1 level blue micro-
spoon of Cl -1, close
2
with the screw cap.