Millipore Spectroquant Multy Operating Manual page 198

Measuring range: 50 – 3000 mg/l volatile organic acid
71 – 4401 mg/l volatile organic acid
Check the pH of the Select method 5 3 1 .
sample, specified range:
pH 2 – 12.
Add to the second cell Heat both cells in the
0.50 ml of distilled water thermoreactor at 100 °C
with pipette, close with for 15 minutes. Then cool
the screw cap, and mix. to room temperature
(Blank cell) under running water.
Reaction time: Insert the blank cell into
1 minute the cell compartment.
Press Enter to start Align the mark on the
the countdown. cell with that on the pho-
tometer. Press Zero .
Release 08/2014 - Spectroquant
Volatile Organic Acids
Pipette 0.75 ml each of
OA-1 into two round
cells.
Add to each cell 1.0 ml of
OA-3 with pipette.
Insert the cell containing
the sample into the cell
compartment. Align the
mark on the cell with
that on the photometer.
Press Test .
®
Multy
(calculated as acetic acid)
(calculated as butyric acid)
Add to each cell 0.50 ml
of OA-2 with pipette.
Add to each cell 1.0 ml of
OA-4 with pipette, close
with the screw cap, and
mix.
Quality assurance:
To check the measurement system (test reagents, meas-
urement device, and handling) a standard solution must
be prepared from sodium acetate anhydrous, Cat.No.
106268 (see section "Standard solutions").
101809
Test
16-mm cell
16-mm cell
Add to one cell 0.50 ml
of the sample with pi-
pette, close with the
screw cap, and mix.
Add to each cell 1.0 ml of
OA-5 with pipette, close
with the screw cap, and
mix.