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MON20/20 Software for Gas Chromatographs User Manual
OCTOBER 2010 3-9000-745
B-5
where
The percent deviation of new RF average from old RF average is
calculated in the following manner:
where the absolute value of percent deviation for alarm has been
previously entered by the operator.
Calculation in mole percent w/o normalization
Once response factors have been determined by the controller or entered
by the operator, component concentrations are determined for each
analysis using the following equations:
where
RFAVG
n
Area or height average response factor for component n.
RF
i
Area or height response factor for component n from the calibration
run.
k Number of calibration runs actually used to calculate the response
factors.
or
CONC
n
Concentration of component n in mole percent.
AREA
n
Area of component n in unknown sample.
ARF
n
Response factor of component n calculated from area of calibration sample.
Units are area per mole percent.
Ht
n
Peak height of component n in unknown sample.
HRF
n
Response factor of component n calculated from peak height of calibration
sample. Units are height per mole percent.
deviation
RF
new
RF
old
–
RF
old
-----------------------------------
100×=
CONC
n
Area
n
ARF
n
---------------
= CONC
n
Ht
n
HRF
n
--------------
=