Millipore Spectroquant Multy Operating Manual page 109

Determination:
Suspend the bottom Carefully pipette 3.0 ml
sediment in two cells by of the depleted sample
swirling. into a reaction cell, close
tightly with the screw cap,
and mix vigorously.
Caution, the cell
becomes hot!
Swirl both cells after Replace both cells in the
10 minutes. rack for complete cool-
ing to room temperature.
(Very important!)
Release 08/2014 - Spectroquant
COD
Chemical Oxygen Demand
for seawater / high chloride contents
Carefully pipette 3.0 ml
of the depleted blank
into a second reaction
cell, close tightly with the
screw cap, and mix vigor-
ously.
Caution, the cell
becomes hot!
(Blank cell)
Select method 5 7 1 .
®
Multy
Heat both cells in the
thermoreactor at 148 °C
for 2 hours.
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 COD/chloride standard
solution must be prepared from Potassium hydrogen
phthalate, Cat.No. 102400 and Sodium chloride, Cat.No.
106404 (see section "Standard solutions").
117059
Cell Test
Remove both cells from
the thermoreactor and
place in a test-tube rack
to cool.
Insert the cell containing
the sample into the cell
compartment. Align the
mark on the cell with
that on the photometer.
Press Test .