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The influence of the pore size of bonded phases containing phenyl groups on the retention of polycyclic aromatic hydrocarbons in reversedphase liquid chromatography

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Summary

Differences in bonded phase properties were studied for triphenyl, diphenyl, phenyl and benzyl phases prepared on a variety of silicas. A total of six silicas with pore diameters ranging from 100 to 200 Å were used in the synthesis. The effect of the pore diameter of the silicas on the retention of polycyclic aromatic hydrocarbons are discussed. Differences in retention were observed as a function of pore size, but not much difference was observed with substrates having pore sizes larger than about 170Å. The observed phenomena are explained by two steric exclusion mechanisms, one during the bonding reaction, and the other in the chromatographic analysis. Statistical calculations were performed using the descriptors showing molecular size and/or shape. The results indicated that the difference between bulky phases and less bulky phases was only observed in the degree of shape-recognition ability of the solute while no differences exist in the retention mechanisms on the different phases.

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Jinno, K., Okamoto, M. The influence of the pore size of bonded phases containing phenyl groups on the retention of polycyclic aromatic hydrocarbons in reversedphase liquid chromatography. Chromatographia 20, 242–248 (1985). https://doi.org/10.1007/BF02259696

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Key Words

  • Column liquid chromatography
  • Phenyl bonded phases
  • Effect of pore size on retention
  • Polycyclic aromatic hydrocarbons
  • Silica supports