Page 33 - 5_TOC in daily practice

SCA-130-517

■ Detection limit The limits of detection and determination in
The areas obtained were used to calculate this case also clearly is below 1 mg/mL.
the limits of detection and determination in
accordance with DIN 32645. Limit of detection: 0.249 mg/L

Limit of detection: 0.772 mg/L Limit of determination: 0,911 mg/ L

Limit of quantification: 2.968 mg/ L

Following calibration, a control sample with a Note: The reproducibility of the method is
TOC content of 15 mg/L (3 injections) was also dependent on the injection routine of the
measured. The recovery was 97.4% (14.6 user.
mg/L).

10
Signal[mV] 6 3 ■ Recommended analyzer / configuration

TOC-L CXH
-1 Manual gas sample injection kit
0 5
Figure: Peaks of the control sample (15 mg/L)

■ Measuring range < 1 mg/L
When limits of detection and determination
are desired that are significantly lower than 1
mg/L, it is possible to increase the injection
volume to 20 µL. A concentration range of 0.5
– 5.0 mg/L was selected for this purpose.

Kal. Kurve
9,76415
8
6
Fläche 4

2

0
0 1 2 3 4 5 5,5
Konz[mg/L]

Figure: TC calibration with 20 µL injection volume (r =
0.9998).