Page 10 - 5_TOC in daily practice

SCA-130-504

■ Endurance test
To determine the performance of this option,
a brine solution was measured in a long-term
test. For this purpose, a 28 % NaCl solution
(matrix adapted with a 15 % sulfuric acid
solution and spiked to a 5 ppm TOC solution
using a KPH solution) was injected 220 times.
Initially, a blank value and a control standard
with 10 ppm TOC were measured. The
control standards were tested after 110 and
220 injections, respectively. The injection
volume was 50 µL.
■ Recommended Analyzer / Configuration
The following figure shows the excellent TOC-L CXX
reproducibilities and the stability of the ASI-L
measurement. Kit for high-salt samples
B-Type Scrubber
(At very high halogen concentrations in the
High Salt Conbutiuon tube 28%NaCl in 5mg/LKHP[Inj:50uL Acid:15%]
Concentratoin 50 matrix, the B-type scrubber is recommended.
This scrubber protects the detector cell of the
Area
10
Concentration[mg/L] 8 6 4 30 Area NDIR detector.)
40

20
0
0 2 10
0 50 100 150 200 250
Injections

Fig. Results of endurance test

■ Related application
The high-salt kit is used for many different
applications in order to keep the maintenance
need for difficult matrices as low as possible.

Examples:
 104 TOC-Determination in seawater
 304 TOC-Determination in brine solution
 306 TOC-Determination in soda solution
 308 TOC-Determination in sodium nitrate
 603 TOC-Determination in chemical
industry