Investigation of the influence of some experimental parameters on the position of the deposition zone in a temperature-gradient tube

An investigation of the influence of some experimental parameters on thermochromatographic separations has been carried out. It is shown that the position of the deposition zone depends on separation time, purity of the inert gas, and on type and amount of the chlorinating agent. The gas flow rate and the amount of the transported compounds have no influence within the limits of experimental conditions. From the experimental results it can be concluded that in some cases the deposited compounds react with the surface or with the excess gas. (author)