The new apparatus allows to widely study phenomena of self-disproportionation of enantiomers by sublimation. Here, the model case of TLA showed a linear evolution of the sublimate at a rate dependent only on the vapor pressure of the initial scalemic mixture, in contrast to the occurring disproportionation. The time resolved analysis of the gaseous recondensed phase revealed a similar initial optical purity for all tested scalemic mixtures and a progressively more abrupt change the further away the initial enantiomeric excess of the sample is.