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

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

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Gas Chromatography
Split injection is carried out by

splitting the sample into smaller portions to inject at the same time through parallel ports
splitting off some of the sample so that it does not enter the column
None of these
splitting the sample into smaller portions to inject sequentially

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