Add 3 drops of Cl
2
-2,
close with the screw
cap, and mix.
Place 6 drops of Cl
2
-1
into a round cell.
Measuring range: 0.10 – 6.00 mg/l Cl
2
16-mm
cell
Add 10 ml of the sample
with pipette, close with
the screw cap, and mix.
Chlorine
(with liquid reagents)
Determination of free chlorine,
total chlorine, and combined chlorine
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)
Select method 1 3 2 ,
select subitem >>dif.
Insert the blank cell into
the cell compartment.
Press Zero .
100086/100087/
100088
Cell Test
Remove the sample cell
from the photometer,
open, add 2 drops of
Cl
2
-3, close with the
screw cap, and mix.
Insert the cell containing
the sample into the cell
compartment. Align the
mark on the cell with
that on the photometer.
Press Test . (= T1)
Insert anew the cell con-
taining the sample into
the cell compartment.
Align the mark on the
cell with that on the pho-
tometer. Press Test .
(= T2)
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 16-mm cell before the addition of
reagent Cl
2
-3. 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
Reaction time:
1 minute
Press Enter to start
the countdown.
