October 24, 2021, 02:50:40 AM
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Topic: gaschromatography principles : doubt  (Read 191 times)

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Offline xshadow

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gaschromatography principles : doubt
« on: September 16, 2021, 01:00:13 PM »
Studying  the liquid gaschromagraphy principles I don't undertstand one crucial thing...

Suppose we have a mixtures.
When we vaporize the mixture  will ALL the components  enter in the gaschromatographic coloumn (and there each one will be separated thanks a distribution equilibrium controlled by the Henry Constant - I suppose)  OR in the coloumn  will arrive  only first  the  the most volatile compound ,than the second one, than the third.

i.e IS the separation between compounds  done before  they enter in the coloumn or is done later,  in the coloumn itself? Thanks :)

Offline Borek

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Re: gaschromatography principles : doubt
« Reply #1 on: September 16, 2021, 01:25:23 PM »
Separation occurs in the column.
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Offline VP_JQ

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Re: gaschromatography principles : doubt
« Reply #2 on: September 17, 2021, 05:23:34 PM »
Hi, xshadow!

The separation between compounds occurs in the column, by modulating the oven temperature :)

Best regards!



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