Millipore Spectroquant Multy Operating Manual page 192

Measuring range: 5.0 – 80.0 mg/l TOC
Removal of inorganic bound carbon (TIC):
Check the pH of the Place 25 ml of the
sample, specified range: sample into a suitable
pH 2 – 12. glass vessel.
If required, add dilute
sulfuric acid drop by
drop to adjust the pH.
Stir both glass vessels
for 10 minutes:
stirred sample / blank
Heat both cells, standing Remove both cells from
on their heads, at 120 °C the thermoreactor and
in the thermoreactor for let them, standing on
2 hours. their heads, to cool for
1 hour.
Release 08/2014 - Spectroquant
TOC
Total Organic Carbon
16-mm cell
Place 25 ml of distilled
water (Water for chroma-
tography LiChrosolv
Cat.No. 115333, is
recommended) into a
second suitable glass
vessel. (Blank)
Preparation of measurement sample:
Pipette 3.0 ml of the
stirred sample into a
reaction cell.
Select method 5 0 0 .
®
Multy
Add to each glass
vessel 3 drops of
®
, TOC-1K and mix.
Pipette 3.0 ml of the
stirred blank into a
second reaction cell.
(Blank 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-
ure ment device, and handling) a TOC standard solution
®
Certipur , Cat.No. 109017, concentration 1000 mg/l TOC,
can be used after diluting accordingly.
114878
Cell Test
Check the pH, specified
range pH < 2.5.
Add to each cell 1 level
grey microspoon of
TOC-2K. Immediately
close the cells tightly
with an aluminium cap
(Cat.No. 173500).
Insert the cell containing
the sample into the cell
compartment. Align the
mark on the cell with
that on the photometer.
Press Test .