Millipore Spectroquant Multy Operating Manual page 81

Measuring range: 0.02 – 4.50 mg/l Cl
Check the pH of the Select method 1 3 1 ,
sample, specified range: select subitem >>total.
pH 4 – 8.
If required, add dilute
sodium hydroxide
solution or sulfuric acid
drop by drop to adjust
the pH.
Shake the cell vigor- Add 2 drops of Cl
ously to dissolve the close with the screw
solid substance. cap, and mix.
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).
After each determination of total chlorine rinse the cell
with sulfuric acid 25 % and subsequently several times
with distilled water.
Release 08/2014 - Spectroquant
Chlorine
Determination of total 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)
-2, Reaction time:
2
1 minute
Press Enter to start
the countdown.
®
Multy
Pipette 10 ml of the
sample into a 24-mm
cell.
Insert the blank cell into
the cell compartment.
Align the mark on the
cell with that on the pho-
tometer. Press Zero .
Quality assurance:
To check the measurement system (test reagents, meas-
urement device, and handling) a freshly prepared standard
from Chloramine T GR, Cat.No. 102426, can be used (see
section "Standard solutions").
100599
Test
Add 1 level blue micro-
spoon of Cl -1, close
2
with the screw cap.
Insert the cell containing
the sample into the cell
compartment. Align the
mark on the cell with
that on the photometer.
Press Test .