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Behaviour of chemically bonded alkylmethyldichlorosilanes to silica gel in reversed-phase high-performance liquid chromatography

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Summary

Bonded hydrocarbon phases were prepared by the reaction of alkylmethyldichlorosilanes to silica (Lichrosorb Si 100, 10 μm Merck). Alkyl phases, CH3 (CH2)n (CH3)Si= with n=7, 10, 14 and 17 were investigated and compared with materials obtained by the reaction of alkyltrichlorosilanes. In reversed phase chromatography using water-methanol as mobile phase a linear relationship between the capacity ratios k′ and the amount of carbon was found in all cases. All alkylmethyl phases proved to be superior to the alkyl phases. Capacity ratios and selectivities are increased and the efficiencies, with one exception, are higher. The improved properties are discussed in relation to residual silanol groups on the adsorbent surface.

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Authors and Affiliations

  1. Department of Chemistry, Organic Chemistry II, Ruhr-University Bochum, D-4630, Bochum, West Germany

    H. Hemetsberger, Marlene Kellermann & H. Ricken

Authors
  1. H. Hemetsberger
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  2. Marlene Kellermann
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  3. H. Ricken
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Hemetsberger, H., Kellermann, M. & Ricken, H. Behaviour of chemically bonded alkylmethyldichlorosilanes to silica gel in reversed-phase high-performance liquid chromatography. Chromatographia 10, 726–730 (1977). https://doi.org/10.1007/BF02263084

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  • DOI: https://doi.org/10.1007/BF02263084

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