Comptes Rendus
no. 4-5
Measurement of the Soret coefficients in organic/water mixtures by thermal lens spectrometry
Humberto Cabrera1, 2  ; Flaminio Cordido1  ; Ana Velásquez1  ; Pablo Moreno1  ; Eloy Sira3  ; Santos A. López-Rivera4
1 Laboratorio de Óptica Aplicada, Instituto Venezolano de Investigaciones Científicas (IVIC), 5101 Mérida, Venezuela
2 The Abdus Salam International Centre for Theoretical Physics, 34151 Trieste, Italy
3 Centro de Física, Instituto Venezolano de Investigaciones Científicas (IVIC), 1020-A Caracas, Venezuela
4 Laboratorio de Física Aplicada, Universidad de Los Andes (ULA), 5101 Mérida, Venezuela
Comptes Rendus. Mécanique, Volume 341 (2013) no. 4-5, pp. 372-377.

In this work we utilize an alternative optical method based on thermal lens spectroscopy for characterizing the thermal diffusion in binary liquid mixtures. In this method, the thermal lens and the Soret signals are separated by a time interval to determine the Soret coefficients. As a demonstrative experiment, the Soret coefficients of isopropanol/water and acetone/water mixtures have been measured using that variant. Our results were compared with the recently published experimental and theoretical calculations and very good agreement was achieved.

Publié le :
DOI : 10.1016/j.crme.2013.01.011
Mots clés : Thermal lens, Thermal diffusion, Soret coefficient
Humberto Cabrera 1, 2 ; Flaminio Cordido 1 ; Ana Velásquez 1 ; Pablo Moreno 1 ; Eloy Sira 3 ; Santos A. López-Rivera 4

1 Laboratorio de Óptica Aplicada, Instituto Venezolano de Investigaciones Científicas (IVIC), 5101 Mérida, Venezuela
2 The Abdus Salam International Centre for Theoretical Physics, 34151 Trieste, Italy
3 Centro de Física, Instituto Venezolano de Investigaciones Científicas (IVIC), 1020-A Caracas, Venezuela
4 Laboratorio de Física Aplicada, Universidad de Los Andes (ULA), 5101 Mérida, Venezuela 
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     title = {Measurement of the {Soret} coefficients in organic/water mixtures by thermal lens spectrometry},
     journal = {Comptes Rendus. M\'ecanique},
     pages = {372--377},
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Humberto Cabrera; Flaminio Cordido; Ana Velásquez; Pablo Moreno; Eloy Sira; Santos A. López-Rivera. Measurement of the Soret coefficients in organic/water mixtures by thermal lens spectrometry. Comptes Rendus. Mécanique, Volume 341 (2013) no. 4-5, pp. 372-377. doi : 10.1016/j.crme.2013.01.011. https://comptes-rendus.academie-sciences.fr/mecanique/articles/10.1016/j.crme.2013.01.011/

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