INFICON Explorer Portable Gas Chromatograph - Manual (Page 214)

Calibration
212
Library
After each analysis, Explorer compares detected peaks against those in the library.
It identifies those that match library compounds and then quantifies the identified
peaks using the sensitivity from the library. Peaks are identified by comparing the
retention time of the detected peak to the retention times stored in the library, or it
identifies the peak as the largest peak within a retention time window.
Explorer calculates a sensitivity value for each compound when it is stored in the
library. The sensitivity is the ratio of the measured response (peak area) to the actual
concentration of the compound. Each time a calibration is performed the retention
time and sensitivity values of each compound are updated in the library.
Each assay includes a library of compounds. The compounds and all associated
calibration information have been provided as part of the assay. You may run the
assay as it has been programmed for you, or you may customize the assay for your
particular application.
If you have more than one assay or if you have created your own assay, a calibration
must be performed to update the library information each time a different assay
library is loaded for use.
If Explorer will be set up for loop injection, compounds must be stored by loop
injection and then calibrations must be performed using loop injection
techniques. Samples that are injected manually by syringe must be stored by
syringe and then calibration must be performed by syringe injection. If both loop
and syringe injection techniques are used, create a library for each.
NOTE: Do not use a library created by loop injection interchangeably with one created by
syringe injection.