Yokogawa GC8000 Process Gas Chromatograph - Manual (Page 479)

<Appendix E Computation Scheme>
App.E-6
IM 11B08A01-01E
Peak area/peak height
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Select one of the following Concentration computation processing
External standard
(approximation
from cubic
equation)
External standard
(approximation
from linear
equation)
Total
compensation
operation
Variation
coefficient
External standard
(calibration
computation)
Indirect method Corrected area
normalization
Select wheter to execute
Concentration value Variation coefficient
 Peak Detection
The details on square processing, retention time detection processing, and tangent processing
are the same as in peak processing in Manual mode.
(a) Base Line Correction Processing
 Base Line Correction
In base line correction, stored chromatogram data are subtracted from the measured detector
signal data, and processing following the peak detection are carried out on the subtracted data.
When storage is specifi ed, base line correction is not done.
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Measured chromatogram
Stored chromatogram
Corrected chromatogram
You can select whether or not correction is carried out for each stream.
(b) Auto-tracking Peak Processing
As the retention time changes, gates for each peak are displaced. To prevent this displacement,
auto-tracking peak processing automatically changes the gate time for each peak according to
the change in the retention time.
2nd Edition : May 11, 2012-00