The Choice of Polar Stationary Phases for Gas-Liquid Chromatography by Statistical Analysis of Retention Data

• Published in: Chromatographia (ISSN: 0009-5893), vol. 70, p. 831-837
• Springer Verlag, 2009

We have studied the retention indices of 127 volatile substances on a C-78-paraffin and on its seven nearly isochor and isomorphous polar derivatives over a temperature range of 90-210 A degrees C. The retention index of a substance on the C-78 paraffin has been considered as the standard. The additional retention on the polar derivative was given by the difference of its retention index on the polar solvent and on the C-78-paraffin. Statistical analyses of the additional retention have shown that with respect to retention, the seven polar solvents can be classified into three groups: Type I: TTF (tetrakistrifluoromethyl), MTF (monotrifluoromethyl), Type II: PCN (primary cyano), PSH (primary thiol) and Type III: TMO (tetramethoxy), SOH (secondary alcohol) and POH (primary alcohol). It is shown that these three types are best represented by the solvents TTF, PCN and TMO. PSH (primary thiol) is aligned with PCN at temperatures up to about 150 A degrees C, but is similar to TMO at 210 A degrees C.

Keywords: Gas chromatography ; Retention indices on polar stationary phases ; Interaction Free Enthalpies ; Pair-Wise Interactions ; Alcohol Groups ; Solutes

Reference

• EPFL-ARTICLE-159443
• doi:10.1365/s10337-009-1242-5
• View record in Web of Science

Record created on 2010-11-30, modified on 2017-05-12