Gas Chromatography
Headspace analysis is carried out in order to

determine the psychological state of the tutor
analyse volatile compounds from solid or liquid samples
analyse the column contents ahead of the sample
determine non-volatiles

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Gas Chromatography
In column switching chromatography

compounds trapped on one column are eluted to another column
the flow to the column is switched on and off repeatedly
one column is removed and replaced by another
any of the above

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