Millipore Spectroquant Multy Operating Manual page 75

Measuring range: 0.02 – 4.50 mg/l Cl
Check the pH of the Select method 1 3 1 ,
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
24-mm cell
2
Fill approx. 10 ml of
distilled water into a
24-mm cell (do not add
any reagents!), close
with the screw cap.
(Blank cell)
Insert the blank cell into
the cell compartment.
Align the mark on the
cell with that on the pho-
tometer. Press Zero .
®
Multy
Pipette 10 ml of the
sample into a 24-mm
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").
100598
Test
Add 1 level blue micro-
spoon of Cl -1, close
2
with the screw cap.