Abstract
The thermal stability of nine eutectic inorganic salts with melting temperatures between 80 and 180°C was evaluated. The contact angles of six of these salt melts on glass and PTFE are similar to that of 1,2,3-tris-(2-cyanoethoxy)propane, a strongly polar organic phase. Packed and capillary columns with salt melts as stationary phase were prepared. It appears that the retention mechanism of hydrocarbons on salt melts is dominated by adsorption at the liquid surface. The separation is strongly dependent on the sample size. Packed columns with 700 and capillary columns with up to 2000 theoretical plates per metre could be prepared. An example is given of the separation of a n-alkane mixture with an average molecular weight of 628.
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