GE Sievers Innovox - Point-To-Point Multi-Point Calibration

GE Analytical Instruments ©2016 112 of 270 DLM 68100-09 EN Rev. A
Chapter 5: Calibration and Verification
Figure 34: Linear Fit Six-Point Calibration
Point-to-Point Multi-Point Calibration
The advantage of selecting the point-to-point calibration is that any non-linearity of response is compensated
for during the calibration.
Figure 35
depicts a point-to-point calibration with 6 points. Like the linear fit, the point having the lowest
concentration is measured first, and the points must increase in concentration at each step. Point 1 can either
be reagent water or a higher, known concentration.
The Analyzer calculates an intercept and slope for the line connecting each pair of points, as shown in Figure 35
.
When this calibration is later applied to a sample, the Analyzer applies the appropriate intercept and slope,
based on the magnitude of its mass response for that sample.