Page 25 - 5_TOC in daily practice

SCA-130-513

■ Calibration ■ Example of a real solid sample (Bauxit)
The SSM calibration can be carried out at TC determination
different manner. A solid (with known C- Result: 1.30 ± 0.001% (CV: 0,11%)
content) is weight in a ceramic boat or a
standard solution is added to a sample boat
filled with ceramic wool.

In case of solid calibration, different weights
in of one compound (for example glucose)
are used. Based on the carbon content of the
compound (Glucose contains 40% carbon)
the absolute carbon content in the boat is
calculated (in µg) and used for the calibration
graph (x-axis).

Kal. Kurve
2136,2
IC determination
Result: 0,94 ± 0.009% (CV: 0,95%)
1500
Fläche 1000

500

0
0 4000 8000 12000 18101,6
Abs C [ug]

Figure: TC-Calibration with Glucose

The IC calibration can be done with sodium
hydrogen carbonate (for instant).

Kal. Kurve
1234,2
TOC-Result: 0,36%

900
■Recommended analyzer / Configuration
Fläche 600 TOC-L or TOC-V wet chemical
SSM-5000A
300

Example of Application
0
0 2000 4000 6000 8000 10644,5 108 TOC determination in solids
Abs C [ug]
203 TOC determination in cleaning
Figure: IC-Calibration with NaHCO 3
validation – SWAB method