Gas Chromatography

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How are the components of the mixture separated?• The column is packed with a highly porous, inertpowder (usually silica containing small amounts ofmetallic oxides). This powder is called the solidsupport.• The support is coated with a small amount ( usually 5–10% by weight) of a high boiling liquid before it ispacked into the column.
How are the components of the mixture separated?• Many types of these liquid stationary phases are known:examples include silicone oils, polyesters, and polyethers.• The rate at which a particular component of a mixture passesthrough the column depends on its boiling point, its solubility instationary liquid phase, its polarity, the temperature of thecolumn, and the flow of the carrier gas.• By adjusting these variables, the components of amulticomponent mixture could be separated and analyzed byGC.
Page 1 and 2: Gas ChromatographyGas-liquid chroma
Page 3 and 4: GC - Instrumental componentsCarrier
Page 5 and 6: GC - Instrumental componentsPacked
Page 7: GC - Instrument Operation• First,

Gas Chromatography

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