气相色谱固定液极性和选择性评价

Characterization of Solvent Polarity and Selectivity of Gas Chromatographic Liquid Phases

对非同族化合物溶质在两种固定相上保留值的关系进行了理论推导，并将该方程应用于89种常见固定相的极性和选择性的评价．固定相的极性可用B值来评价，而选择性则用B、C3、C3值来评价．用该方程评价固定相具有两个优点，一是基于分子间作用力来评价固定相；二是探针化合物的选择不再受限制．

An equation, I=AI' BN+C1 , was derivied to correlate the Kovats retention indices for solutes on different stationary phases. In thisequation, A is determined by the interaction energy of a methylene group on two stationaryphases. B is mainly determined by the relative intermolecular interaction energy of the carbonchain of a compound On two stationary phases. C1 is mainly determined by the dispersiveinteraction difference of the functional group(s) of a compound on two phases. C2 isdetermined by the difference of the dipole moment interaction energy of a compound on twophases are determined by the differences of the relative hydrogen-bonding acceptor basicityor donor acidity of two phases. Therefore, we recommended B to describe the polarity of astationary phases, the coefficient to describe the selectivity of a stationary phase.These coefficients for 89 stationary phases were presented in present paper.