Tudor E. Analysis of the equations for the temperature dependence of the retention index. II. Physico-chemical meaning of the parameters.
J Chromatogr A 1999;
859:49-57. [PMID:
10563415 DOI:
10.1016/s0021-9673(99)00847-x]
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Abstract
A general expression for the meaning of various parameters from the retention index-temperature equations was found. This is a linear combination of two solute dependent factors consisting of differences of enthalpies and respective entropies of solution, between the solute and the reference inferior n-alkane. The particular coefficients for each parameter are stationary phase dependent factors. They were calculated from methylene contributions to the thermodynamic functions of solution in SE-30 and Carbowax-20M, revealing the influence of the used temperature range. A short review of structural influences on dI/dT is included.
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