XRF-2000 Series Operating Manual
60
After acquiring all standard, calibration curve must be reviewed and change
calibration parameters to get a good result. Go to Setup -> Set condition in Cal
data window.
Method: Select Empirical or FP- The unknown sample spectrum is
compared to that of standards and the spectrum most similar is used for
estimating the unknown sample's composition. Empirical models are
applied where the coefficient matrix {Aij} is determined by regression
analysis using a set of standard samples with known composition.
Normalize: Select if total concentration is 100%
Remove Background: Select If peak of element is not stand alone.
Regression Method: select one of 6 equations.
#1: Ci = Ai * Ii.+ Ao
#2: Ii = Sum (Aj*Cj)+ Ao
#3: Ci = Sum (Aij*Ij)+ Ao
#4: Ci = Ai*Ii + Ii*Sum (Aj*Cj)+ Ao(i#j)
#5: Ci = Ai*Ii + Ii*Sum (Aj*Ij)+ Ao (i#j)
#6: Ci = A
1
Ii + A
2
Ii
2
+Ao
Remove escape peak: Escape Peaks appearing as a result of the SiK
radiation escaping from the Si detector, can be removed by enabling this
selection.