Millipore Spectroquant Multy Operating Manual page 139

Measuring range: 0.10– 5.00 mg/l Cl
0.07– 3.63 mg/l NH
0.02– 0.99 mg/l NH
Check the pH of the Select method 3 0 0 .
sample, specified range:
pH 4 – 13.
If required, add dilute
sodium hydroxide
solution or sulfuric acid
drop by drop to adjust
the pH.
Reaction time: Add 4 drops of MCA-2,
5 minutes close with the screw
Press Enter to start cap, and mix.
the countdown.
Important:
Very high monochloramine concentrations in the sample
produce turquoise-colored solutions (measurement so-
lution should be yellow-green to green) and false-low
readings are yielded. In such cases the sample must be
diluted (plausibility check).
Release 08/2014 - Spectroquant
Monochloramine
24-mm cell
2
Cl 24-mm cell
2
Cl-N 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)
Reaction time:
10 minutes
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 standard solution must
be prepared (see section "Standard solutions").
101632
Test
Add 0.60 ml of MCA-1
with pipette, 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 .