Characterization of Solvent Polarity and Selectivity of Gas Chromatographic Liquid Phases

Abstract

Abstract: An equation, I=AI' BN+C₁∑n₁R_Di+C₂μ_A²+C_{3^αα+C3^ββA+C4,} was derivied to correlate the Kovats retention indices for solutes on different stationary phases.In thisequation, Ais determined by the interaction energy of a methylene group on two stationaryphases.Bis 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 two phases C3^α,C3^β are determined by the differences of the relative hydrogen-bonding acceptor basicityor donor acidity of two phases.Therefore, we recommended Bto describe the polarity of astationary phases, the coefficient B,C3^α,C3^βto describe the selectivity of a stationary phase.These coefficients for 89 stationary phases were presented in present paper.

Key words: Stationary phase, Polarity, Selectivity, Gas chromatography

CLC Number:

O657.7

TrendMD:

WANG Wen-Ling, ZHANG Xiang-Min, LU Pei-Zhang, DENG Jia-Qi. Characterization of Solvent Polarity and Selectivity of Gas Chromatographic Liquid Phases[J]. Chem. J. Chinese Universities, 1997, 18(11): 1762.

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Characterization of Solvent Polarity and Selectivity of Gas Chromatographic Liquid Phases

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