The pressure impact on S T is consistent across the different systems; however, the temperature influence can be different. In all cases, an increase in pressure from 0.09 to 1.8 yields a decrease of the Soret coefficient of component 1: by 30 %, 417 %, and 53 % for mixtures A, B, and C, respectively. By contrast, S T increases with rising temperature from 0.75 to 1 at p = 0.09 for mixture B by 50 %, whereas it decreases by 44 % (small purple symbols) are also included as well as predictions on the basis of Reith's and Müller-Plathe's regression model (ochre solid line). and 6 % for mixtures A and C, respectively. However, half of these relative change figures