In order to carry out this analysis, as outlined in EBC (2012-2022), we need to mill the sample to a particle size below 3.15 mm and dry it overnight at 40 °C,
followed by a degassing procedure carried out under vacuum for 2 hours at 150 °C. After the samples have been degassed, we start the analysis by measuring the
sample pore volume at relative pressures from 0.05 to 0.35 distributed along 5 points. Nitrogen is used as the adsorbate and liquid nitrogen as the media for keeping
the thermal equilibrium of the experiment.
If the analytical package also includes the pore size distribution of the sample, the pore volume is measured at relative pressures from 0.05 to 0.99 distributed along 20 points
for producing a standard isotherm or along 40 points for producing a high-resolution isotherm.