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Plugin: Retention Index Calibration - Log-Polynomial Regression

Posted: May 4th, 2018, 3:44 pm
by qtao
GC Image software provides generic functions to perform calibration from retention times to retention indices or other chemical properties. For some chemical properties such as molecular weight or density, a specialized regression model may correlate retention times better with them. Such regression model can be added as a customized plugin. As an example, the Log-Poly3 Fit plugin implements a ln(RI) vs. retention time 3rd-order polynomial calibration function.


The plugin requires Version 2.6 or later.
  1. Download here: the Log-Poly3 Fit plugin
  2. Unzip it using File Explorer or another application.
  3. Start GC Image.
  4. From the menu, select Tools > Manage Plugins...
  5. Click on Import and then select the RI-LogPoly3Fit.plugin folder.
  6. Press OK to finish the installation. Log-Poly3 Fit will now be listed in the table.

Configure > RI Table > Settings, and choose Custom > Log-Poly3 Fit as shown below: