Gas Chromatography-Flame Ionization Detection (GC-FID) is an analytical technique that is used to separate and analyse mixtures consisting of volatile components. The liquid sample is vaporized in the injection port. Typically, the compounds analysed are less than 1,000 Da, because it is difficult to vaporize larger compounds. GC is popular for environmental monitoring and industrial applications because it is very reliable and can be run nearly continuously. GC is typically used in applications where small, volatile molecules are detected and with non-aqueous solutions.
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