Page 6 - 5_TOC in daily practice

SCA-130-502

POC-Peak:

NPOC-Peak:

Fig. POC-Calibration with IC-standard

■ System testing
In POC analysis, it is of great importance that
the LiOH trap functions perfectly. A test
should, therefore, be carried out to confirm
the efficiency of the CO 2 trap. This test
should be carried out each working day: Result:
An IC control solution (TIC = 1000 mg/L) is
prepared and analyzed as a POC sample. TOC=4,05mg/l
For efficient functioning of the LiOH trap, the
POC measuring result must be < 0.1 mg/L. POC=4,05mg/l => 100%
NPOC=0mg/l

■ Example of a POC measurement

Sample: Toluene in ultrapure water ■ Recommended Analyzer / Configuration
TOC-L CXX
Toluene is a compound that is fully ASI-L
purgeable. In the addition method, the POC-Option
toluene sample is completely determined as
POC.

POC measuring method:
Injection volume: 800 µL
Purging time: 3 min