Gas Chromatography
What useful information can be found from a Van Deemter plot?

The selectivity factor
Optimum column temperature
Optimum mobile phase flow rate
Optimum column length

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Gas Chromatography
What does the selectivity factor describe?

The proportional difference in widths of two chromatographic peaks
The relative separation achieved between two species
The maximum number of different species which a column can separate simultaneously
None of these

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