Gas Chromatography
What does the retention factor, k', describe?

The distribution of an analyte between the stationary and the mobile phase
All of these
The migration rate of an analyte through a column
The velocity of the mobile phase

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Gas Chromatography
In column switching chromatography

any of the above
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

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