Retention Index (Isothermal)

Retention Index

If a logarithm of adjusted retention times or relative retentions of n-alkanes is plotted with carbon numbers for isothermal analysis, they will show linear relation. Adding a logarithm of adjusted retention time of an unknown to the above~mentioned graph indicates how many carbon numbers this compound corresponds to. In general, 100 times of a carbon number is defined as the retention index.

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