gcms - Coupling Gas Chromatography to Mass Spectrometry...

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Coupling Gas Chromatography to Mass Spectrometry Introduction The suite of gas chromatographic detectors includes (roughly in order from most common to the least): the flame ionization detector ( FID ), thermal conductivity detector ( TCD or hot wire detector), electron capture detector ( ECD ), photoionization detector ( PID ), flame photometric detector ( FPD ), thermionic detector, and a few more unusual or VERY expensive choices like the atomic emission detector ( AED ) and the ozone- or fluorine-induce chemiluminescence detectors. All of these except the AED produce an electrical signal that varies with the amount of analyte exiting the chromatographic column. The AED does that AND yields the emission spectrum of selected elements in the analytes as well. Another GC detector that is also very expensive but very powerful is a scaled down version of the mass spectrometer . When coupled to a GC the detection system itself is often referred to as the mass selective detector or more simply the mass detector. This powerful analytical technique belongs to the class of
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gcms - Coupling Gas Chromatography to Mass Spectrometry...

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