SEP 2005 MODEL 1000
DESCRIPTION
1-16
1.6.4 Basic Analysis Computations
Two basic analysis algorithms are included in the GC Controller. These are:
Area Analysis - Calculates area under component peak
Peak Height Analysis - Measures height of component peak
Concentration Analysis by Using Response Factor
Concentration calculations require a unique response factor for each component in an analysis.
These response factors may be manually entered by an operator or determined automatically by the
system through calibration procedures (with a calibration gas mixture that has known
concentrations).
Response factor calculation: (using the external standard)
or
Where:
n
ARF = Area response factor for component “n” in area per mole percent (%)
n
HRF = Height response factor for component “n”
n
Area = Area associated with component “n” in calibration gas
n
Ht = Height associated with component “n” in mole % in calibration gas
n
Cal = Amount of component “n” in mole % in calibration gas
Calculated response factors are stored by the GC Controller for use in the concentration calculations,
and are printed out in the configuration and calibration reports.
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