CORRELATION EQUATIONS DESCRIBING RETENTION INDEX DATA FOR N-ALKYLCYCLOPENTENES, N-ALKYLCYCLOHEXENES AND N-ALKYL ESTERS ON OV-101, OV-225 AND PEG 20M

Correlation equations have been derived which relate the Kovats retent ion indices of n-alkylcyclopentenes, n-alkylcyclohexenes and n-alkyl e sters of aliphatic acids on the stationary phases OV-101, OV-225 and P EG 20M to column temperature and carbon number in the alkyl chain. The universal equation: [GRAPHICS] where A, B, C, D and E are correlation coefficients, m is the number of carbon atoms in the side chain (for n-alkylcycloalkenes) or in the alcohol chain (for alkyl esters) and t is the column temperature, describes the retention indices RI of these homologous series with high accuracy (SD < 1 index unit), beginning w ith the first members of the series.