Pipette 10 ml of the
sample into a 16-mm
cell.
Add 1 level blue micro-
spoon of Cl
2
-1, close
with the screw cap.
Measuring range: 0.10 – 6.00 mg/l Cl
2
16-mm
cell
Chlorine
Determination of free chlorine, total chlorine,
and combined chlorine
100599
Test
Shake the cell vigor-
ously to dissolve the
solid substance.
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)
Remove the sample cell
from the photometer,
open, add 2 drops of
Cl
2
-2, close with the
screw cap, and mix.
Select method 1 3 4 ,
select subitem >>diff.
Reaction time:
1 minute
Press Enter to start
the countdown.
Check the pH of the
sample, specified range:
pH 4 – 8.
If required, add dilute
sodium hydroxide
solution or sulfuric acid
drop by drop to adjust
the pH.
Important:
Very high chlorine concentrations in the sample produce yellow-colored solu-
tions (measurement solution should be red) and false-low readings are yielded.
In such cases the sample must be diluted (plausibility check).
After each determination of total chlorine rinse the cell with sulfuric acid 25 % and
subsequently several times with distilled water.
For on-the-spot determinations where there are no suitable facilities for rinsing,
the cell contents can be transferred to a new 24-mm cell before the addition of
reagent Cl
2
-2. Use this second cell only for the determination of total chlorine!
Quality assurance:
To check the measurement system (test reagents, measurement device, and
handling) a freshly prepared standard solution can be used (see section “Stan-
dard solutions”).
Release 08/2014 - Spectroquant
®
Multy
Insert the cell containing
the sample into the cell
compartment. Press
Test . (= T1)
Insert the blank cell into
the cell compartment.
Press Zero .
Insert anew the cell con-
taining the sample into
the cell compartment.
Press Test . (= T2)
