Basics of GC

The detector

It generates a signal proportional to the amount of analyte leaving the column and passing through the detector cell.

Flame ionization detector (FID)

Response coefficient depends on the chemical structure of the compound: this must be taken into account when calibrating by internal standard.

Mass Spectrometer

It generates a mass spectrum characteristic of the chemical structure of the compounds. This makes it an informative detector for identifying analytes.

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