Emerson Process Management 3-9000-745 manual Calculation in mole percent w/o normalization

MON20/20 Software for Gas Chromatographs		User Manual
OCTOBER 2010		3-9000-745
where
RFAVGn	Area or height average response factor for component n.
RFi	Area or height response factor for component n from the calibration
	run.
k	Number of calibration runs actually used to calculate the response
	factors.

The percent deviation of new RF average from old RF average is calculated in the following manner:

deviation =	RFnew – RFold	⋅ 100
	-----------------------------------RFold

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:

	Arean	CONCn =	Htn
	CONCn = -------------- or		--------------
	ARFn		HRFn
where
CONCn	Concentration of component n in mole percent.
AREAn	Area of component n in unknown sample.
ARFn	Response factor of component n calculated from area of calibration sample.
	Units are area per mole percent.
Htn	Peak height of component n in unknown sample.
HRFn	Response factor of component n calculated from peak height of calibration
	sample. Units are height per mole percent.

B-5