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