Page 14 - 3_Chemical industry

SCA-130-306

Calibration of the TOC-L system was carried The higher melting point point of NaSO 4 (881
out using the automatic dilution function in the °C) compared to NaCl (801 °C) has a positive
range of 0.5 mg/L to 10 mg/L. influence on the lifetime of the combustion
tube.

■ Results

The duplicate determination of the soda
solution yielded the following results:

Sample NPOC RSD
[mg/l] [%]
Soda solution 56,4 7,1
(50%)
Soda solution
Fig. Multi-point calibration (50%) 54,8 4,9
with dilution function

For the determination, a TOC-L CPH was 10
9
equipped with a kit for high salt loads. A
special catalyst tube, a special mixture of Signal[mV] 6
various catalyst beads and a ceramics grid, 3
which replaces the platinum net are part of
the kit. 0 -1
0 5 10 15
Zeit[min]

Fig. Peak graphs of a diluted soda solution
(ca.5%)

■ Recommended Analyzer / Configuration
TOC-L CPH
ASI-L
Sample acidification when using the high-salt High-Salt-Kit
kit, is carried out with sulfuric acid in order to B-Type- Scrubber
modify the sample matrix.