Calorimetry by immersion into liquid nitrogen and liquid argon: a better way to determine the internal surface area of micropores Navarrete Casas, Ricardo Llewellyn, Philip Rouquerol, Francoise Denoyel, Renaud Rouquerol, Jean The aim of this work is to assess the internal surface area of a set of samples (either carbons or oxides, either porous or nonporous, either microporous or mesoporous) by microcalorimetry via immersion into liquid nitrogen or argon. We have made use of an isothermal, heat-flux microcalorimeter, initially designed and built in our laboratory for the sake of gas adsorption experiments at 77 or 87 K. It seems that immersion calorimetry into liquid nitrogen and argon makes it possible to go one step further in the determination of the internal surface area of micropores. 2025-03-31T10:54:18Z 2025-03-31T10:54:18Z 2004-09-15 journal article R. Navarrete et al. / Journal of Colloid and Interface Science 277 (2004) 383–386. https://doi.org/10.1016/j.jcis.2004.04.045 https://hdl.handle.net/10481/103348 10.1016/j.jcis.2004.04.045 eng http://creativecommons.org/licenses/by-nc-nd/4.0/ open access Attribution-NonCommercial-NoDerivatives 4.0 Internacional Elsevier