A critical review of the existing analytical solutions of the thermodiffusion equation and methods for measuring heat of transport was performed, Particular emphasis is placed upon the fact that of the reported solutions yielding reasonable accuracy, there is no one solution that describes the diffusion profile behavior while making possible to measure the diffusion substance's heat of transport. Simple thermodiffusion equation solutions were obtained by taking into account the coordinate dependence of the diffusion coefficient and thermodiffusion factor in a temperature field. Such an approach has allowed the proposal of a new method for measuring the heat of transport similar to the conventional method for measuring a diffusing impurity's activation energy.