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Kováts' coefficients for predicting polarities in silicone stationary phases and their mixtures

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Summary

A correlation between the retention polarity and the Kováts' coefficient has been found for a number of commercial stationary phases used in gas chromatography. The correlation has been used to predict the polarity of a few mixed stationary phase columns prepared as binary mixtures of OV-101 with OV-25, DC-550 or Carbowax 20M, and also mixtures of OV-225 with SP-2340. A linear relationship was found between polarity and mixture composition. The temperature dependence of the Kováts' coefficient was investigated and found to increase linearly with temperature, the rate of increase depending on the polarity of the stationary phase, with greater increases for more polar stationary phases.

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Authors and Affiliations

  1. Instituto de Química Física “Rocasolano”, C.S.I.C., Serrano 119, E-28006, Madrid, Spain

    E. Fernández-Sánchez, A. Fernández-Torres, J. A. García-Domínguez & J. M. Santiuste

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  1. E. Fernández-Sánchez
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  2. A. Fernández-Torres
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  3. J. A. García-Domínguez
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  4. J. M. Santiuste
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Fernández-Sánchez, E., Fernández-Torres, A., García-Domínguez, J.A. et al. Kováts' coefficients for predicting polarities in silicone stationary phases and their mixtures. Chromatographia 31, 75–79 (1991). https://doi.org/10.1007/BF02290501

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  • DOI: https://doi.org/10.1007/BF02290501

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