Gas-solid chromatography on macroreticular cation exchange resins

Factor analysis of trends in selectivity in gas-solid chromatography on cation-exchange resins

“…The Zn2+ form shows a particular specificity for branched alkenes. While for linear alkenes AI on Zn2+ is about 20 IU, it increases to 70-100 for branched alkenes, except for compound 20 (2,3,3-trimethylbutene-l) which has a relatively low value on the Zn2+ packing.…”

“…The point for the K+ column is nearer to the cluster of aromatic compounds than that for Tl+ because the K+ packing gives Kovats indices for aromatic compounds about 10 IU higher than the Tl+ packing. Both packings show enhanced retention of the aromatic compounds because large cations are generally effective in polarizing aromatic rings-but not isolated double bonds-for enhanced adsorption and retention (20). The columns packed with the ion-exchanger in the Ni2+, Zn2+, and Ag+ forms all show specific interactions with unsaturated compounds, and so their points are to the right of the points for the other four columns in Figure 1.…”

“…Gas-solid chromatography on macroreticular cation-exchange resins in different metal-ion forms appears to be an attractive means of reaching the goal. It offers good selectivity among hydrocarbons, depending on the ion used (20). The lightly sulfonated porous polymer resin has high column operating efficiency (21).…”

Factors involved in the high pressure liquid chromatographic separation of alkenes by means of argentation chromatography on ion exchangers: Overview of theory and new practical developments

“…Recently, solid phase extraction columns with a cation exchanger in the silver form were proposed for the prefractionation of unsaturated triacylglycerols (Christie, 1990). The application of silver-loaded ion exchangers has also been attempted in GC, and even patented (Packard Instruments, 1986), but the peak width was too large for practical purposes (Hirsch et al, 1973). The above literature citations are just some examples of the many papers published in this area and do not give a complete overview of the field.…”

Chemically modified polymeric resins for high performance liquid chromatography, solid-phase extraction and organic separation by LC and GC

“…They found that these resins were highly adsorptive packings for gas-solid chromatography and showed good selectivity among hydrocarbons. The silver form of the resin retained aromatic and olefinic compounds strongly and separate geometric isomers of the olifins [57].…”