CHARACTERIZATION OF SOLVENT POLARITY AND SELECTIVITY OF GAS-CHROMATOGRAPHIC LIQUID-PHASES

An equation, I = AI'BN+C-1 Sigma n(i)R(Di)+C-2 mu(A)(2)+C(3)(alpha)alp ha+C(3)(beta)beta+C-4 was derived to correlate the Kovats retention in dices for solutes on different stationary phases. In this equation, A is determined by the interaction energy of a methylene group on two st ationary phases. B is mainly determined by the relative intermolecular interaction energy of the carbon chain of a compound on two stationar y phases. C-1 is mainly determined by the dispersive interaction diffe rence of the functional group(s) of a compound on two phases. Ct is de termined by the difference of the dipole moment interaction energy of a compound on two phases C-3(alpha), C-3(beta) are determined by the d ifferences of the relative hydrogen-bonding acceptor basicity or donor acidity of two phases. Therefore, we recommended B to describe the po larity of a stationary phases, the coefficient-B, C-3(alpha), C-3(beta ) to describe the selectivity of a stationary phase. These coefficient s for 89 stationary phases were presented in present paper.