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There are many types of detectors that can be used in gas chromatography. The most common ones are flame ionization detector (FID) and thermal conductivity detector (TCD) headspace vials. Both detectors are sensitive to a wide range of analytical components and can measure a wide range of concentrations. TCD is versatile in nature and can be used to detect anything other than carrier gas (as long as their thermal conductivity differs from the carrier gas at the temperature detected by the detector), while FID is primarily responsible for hydrocarbons. Sensitive. FID is more sensitive to hydrocarbons than TCD, but it cannot be used to detect water. Both detectors are very powerful. Since the detection of TCD is non-destructive, it can be used in tandem with the destructive FID (before the FID) to give two complementary analytical information to the same analyte.
Some gas chromatographs are connected to a mass spectrometer and a mass spectrometer is used as a detector. This combined instrument is called gas chromatography-mass spectrometry (GC-MS, referred to as GC/MS), and some GC/MS instruments are available. It is also connected to a nuclear magnetic resonance spectrometer, which serves as an auxiliary detector. This instrument is called gas chromatography-mass spectrometry-nuclear magnetic resonance (GC-MS-NMR). Some GC-MS-NMR instruments are also connected to an infrared spectrometer, which serves as an auxiliary detector. This combination is called gas chromatography-mass spectrometry-nuclear magnetic resonance-infrared (GC-MS-NMR-IR). However, it must be pointed out that this situation is rare, and most of the analytes can be solved with a simple GC/MS headspace vials.
This is the end of the introduction of Gas chromatography Detector. I hope it can help you.