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  • 1
    Electronic Resource
    Electronic Resource
    Regularities in the retention of nonsubstituted polynuclear aromatic hydrocarbons in liquid chromatography on polar adsorbents (1985)
    Springer
    Chromatographia 20 (1985), S. 533-537 
    Details
    ISSN: 1612-1112
    Keywords: Liquid chromatography ; Polyaromatic hydrocarbons ; Polar stationary phase ; Relationship between retention and molecular structure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary The retention of polynuclear aromatic hydrocarbons (PAH) is studied in liquid chromatography, using columns packed with silica gel with a hydroxylated surface and the same silica gel with surface-bonded amine and nitrile groups. A linear relationship was found between retention and the number of π-electrons in the molecule, the size of the molecule and the different types of carbon atoms in the molecule. The different carbon atoms in a PAH molecule contribute differently to the retention and this contribution depends on the nature of the polar functional groups on the adsorbent's surface and on the nature and concentration of a polar modifier present in a non-polar eluent.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02312172
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  • 2
    Electronic Resource
    Electronic Resource
    Molecular parameters and retention characteristics of unsubstituted polyaromatic hydrocarbons in HPLC (1988)
    Springer
    Chromatographia 25 (1988), S. 272-278 
    Details
    ISSN: 1612-1112
    Keywords: Column liquid chromatography ; Polyaromatic hydrocarbons ; Molecular parameters ; Retention prediction
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary The present research studies the possibility of using the correlation dependence between molecular parameters of unsubstituted polyaromatic hydrocarbons (PAH) and their retention in reversed-phase liquid chromatography to optimize the conditions for the separation and identification of unknown peaks on the chromatograms of multicomponent mixtures. A linear correlation equation, that takes the number and environment of the carbon atom in the PAH molecule into account as well as the differences in the specific interactions of isomeric molecules with polar eluent, has been proposed. The adequacy of the proposed PAH retention model was verified by comparing the calculated retention values with the experimental data. The possibility of identifying unsubstituted PAH according to the number of carbon atoms of various types and according to the values of the molecules lengths (calculated on the basis of the retention of these substances under different eluent compositions) was exemplified by various chromatographic systems (reversed phase-eluent-PAH molecules).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02324700
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    Paper (German National Licenses)
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