K. Furton, S. Poole, C. Poole
1987
Citations
0
Influential Citations
15
Citations
Journal
Analytica Chimica Acta
Abstract
Abstract The gas chromatographic properties of two room-temperature liquid organic salts, triethyl-n-hexylammonium triethyl-n-hexylboride (TEHAB) and stearylmethyldipolyoxethyl(15)ammonium chloride (Ethoquad 18 25 , are described. Triethyl-n-hexyl-ammonium triethyl-n-hexylboride could be used up to temperatures of 130°C but showed poor stability towards air and undesirable reactivity towards some dipolar and proton donor/acceptor solutes when used as a column packing material. In contrast, Ethoquad 18 25 had a maximum column operating temperature of 280°C, or 300°C after vacuum conditioning. From a calculation of mcReynolds' phase constants and the molar free energy, enthalpy, and entropy of solution for polarity test probes, it was established that Ethoquad 18 25 showed intermediate selectivity for dipolar and proton-donor solutes compared to results for conventional non-ionic phases. Ethoquad 18 25 is an excellent phase for the profiling of essential oils.