Correlation equations describing retention index data forn-alkylcyclopentenes,n-alkylcyclohexenes andn-alkyl esters on OV-101, OV-225 and PEG 20M

Summary

Correlation equations have been derived which relate the Kováts retention indices ofn-alkylcyclopentenes,n-alkylcyclohexenes andn-alkyl esters of aliphatic acids on the stationary phases OV-101, OV-225 and PEG 20M to column temperature and carbon number in the alkyl chain. The universal equation:

$$\begin{gathered} RI = A + B \cdot m + C \cdot \log (m)/m + \hfill \\ D/[(m - 2)^2 + 0.1] + Et \hfill \\ \end{gathered} $$

whereA, B, C, D andE are correlation coefficients,m is the number of carbon atoms in the side chain (forn-alkylcycloalkenes) or in the alcohol chain (for alkyl esters) andt is the column temperature, describes the retention indicesRI of these homologous series with high accuracy (SD<1 index unit), beginning with the first members of the series.