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Slide 1

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By Lord Admiral General Matthew
Harrison OBE…read more

Slide 2

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For separating and analyzing compounds that can be vaporized
without decomposition.
Uses include testing the purity of a particular substance, or separating
the different components of a mixture.
Gas chromatography allows a mixture of compounds to be separated.
The GC machine consists of a long glass tube packed with a
powdered solid material, which is fitted into an oven. The tube is
called the column, even though it is usually wound into a coil so that
it fits into the oven.…read more

Slide 3

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The sample is dissolved in a solvent, then injected into one end of the
An unreactive gas - usually nitrogen - carries the sample through the
Different substances in the sample travel through the column at
different speeds and so become separated from each other.
The separated substances leave the column one after the other. As
they leave, they are detected by a detector.…read more


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