A data base for polymer chromatography: Temperature dependence of interaction parameters in liquid adsorption chromatography |
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Authors: | Bernd Trathnigg Nguyen Viet Cuong Hasnat Ahmed |
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Institution: | Institute of Chemistry, Karl‐Franzens‐University, Central Polymer Laboratory/Molecular Characteristics (CePol/MC), Graz, Austria. Fax: +43‐3163809840 |
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Abstract: | The temperature dependence of retention behaviour of polyethylene glycol (PEG) and its mono‐ and dimethyl ethers was studied on various RP columns in different mobile phases. The accessible volumes and the interaction parameters were determined from slope and intercept in a plot of the elution volumes of the oligomers of a polymer homologous series as a function of the difference of the elution volumes of consecutive oligomers. A quite different dependence of the interaction parameters was observed in the different mobile phases. While in methanol–water the interaction parameter decreases with increasing temperature, the opposite effect is observed in acetonitrile (ACN)–water. In acetone–water, the temperature dependence is almost negligible. |
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Keywords: | Adsorption Interaction parameter Liquid chromatography Polymers Temperature dependence |
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