1
Getting Familiar with Your TriPlus RSH
MHE Station
Thermo Scientific
TriPlus RSH User Guide
59
Figure 38.
Entering Measured Areas of Calibration Standard Analyte
Step 2
The natural logarithm of the measured analyte areas are plotted against the extraction
number. Usually, this curve will show good linearity. The validity of the MHE procedure can
be judged from this curve: if equilibrium exists, the curve will be linear, and the MHE
procedure will work. See
.
Figure 39.
Linear Regression for Calibration Standard Analyte
Step 3
The built-in Excel function for linear regression LINEST is used for the calculation of the
parameters of the linear regression fit of the area data. The LINEST function is used in
matrix mode
.
shows the example of the
slope
and
intercept
parameters used in the subsequent
calculation.
Calculation of Linear Regression for Calibration Standard Analyte
Figure 40.
Calculation of Linear Regression for Calibration Standard Analyte
Note
LINEST is the name of this function in the UK version of Excel. This name might
be different in other language versions of Excel.
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