Measuring method
48 Edition 01/2016 multi EA 4000
5.7 Data analysis in the Cl mode
5.7.1 End point routine
After filling the measuring cell or after each change of the electrolyte solution an end point
routine must be performed defining the shutdown threshold of the system. The calculated
indication value represents both the start point and the end point of titration. The end point
routine is started through the multiWin software.
5.7.2 Measuring with split / split factor
In the operating mode with splitting the measuring gas from the combustion chamber is di-
vided in a defined ratio. Only a part of the reaction gas reaches the measuring cell for analy-
sis, thus also permitting the detection of high concentrations.
For Cl content in the low concentration range, no gas splitting is used. The measuring gas
passes completely into the drying unit and the measuring cell.
For working with gas splitting, shares of 10 % and 20 % of the measuring gas can be cho-
sen. The actual split factor of a method can be entered/viewed in the method window on the
C
ALIBRATION tab as DAILY FACTOR (menu item METHOD / EDIT).
IMPORTANT
When creating a new split method, the split factor must first be transferred manually from an
existing method with the same split ratio.
The actual split factor is checked and, where necessary, corrected using standards.
5.7.3 Analysis
The coulometric Cl detection is an absolute analysis method. No calibration is performed.
The result is stated in the analysis report as absolute mass [µg] and as concentration [µg/g]
or [mg/g].
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