Microsyringe or an autosampler is used to inject the sample through a rubber septum into vaporizer port, the injector is generally heated 100-300°C which causes the volatile sample to convert into vapor. The vaporized analytes are carried into the column through the carrier gas to the detector. Gas chromatography has split less and split injection option when the packed and capillary columns are used. In sample splitter, just a fraction of the vaporized sample is allowed to pass into the head of the column and the rest of the sample is exiting through the split.
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