Influence of a Crystal Phase Transition of Thallium(I) Nitrate on Gas Chromatographic Behavior of Organic Adsorbates
- 1 August 1965
- journal article
- Published by Oxford University Press (OUP) in Journal of Chromatographic Science
- Vol. 3 (8) , 269-273
- https://doi.org/10.1093/chromsci/3.8.269
Abstract
A study was conducted to determine the effects of a solid-solid transition of crystalline thallium nitrate (at 79°C) on the adsorption of some representative organic compounds. Plots of logarithm of the capacity ratio, k, vs. 1/T showed sharp increases in k values in the region of the transition for alkenes and cyclenes, while ethanol showed a sharp decrease in k. Two straight lines, intersecting at the transition temperature were obtained for alkanes, cyclanes, aromatics, ethers, and ketones. Heats of adsorption increased or remained unchanged above 79°C for all adsorbates studies. The adsorption behavior of supported thallium nitrate was also investigated. Similar plots for this column showed no changes in slope nor sharp variations in k in the transition region.Keywords
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