Mutual correlation between gas-chromatographic retention indices of organic compounds from different series

The potentialities of linear logarithmic correlation equations for the calc ulation of gas-chromatographic retention indices are considered. These equa tions relate the retention indices (I) to the retention indices of more ful ly characterized compounds from other series (structural analogs) on the sa me stationary phase rather than to physicochemical constants or molecular p arameters of the test organic compounds: logI (series 2) = a logI (series 1 ) + bA + c. The parameter A is responsible for the one-to-one correspondenc e between the positions of the compared compounds in each of the taxonomic groups of substances to be compared. The accuracy of the evaluation is comp arable to the present-day interlaboratory reproducibility of the experiment al determination of retention indices.