Estimating the uncertainty of the specific surface area of Titanium Oxide Nanotubes calculated from nitrogen adsorption isotherms

The characterization of the textural properties of porous solids by isotherms of adsorption-desorption of nitrogen is a procedure commonly used for the study of the porosity of a solid, which is a great importance for meso and microporous solid materials. In the present work an analysis of the estimate the uncertainty associated to the calculation of the specific surface area was carried out. Here, the specific surface area of titanium oxide nanotubes was determined from N2 adsorption isotherms data. The number of moles of gas adsorbed per gram of adsorbent were the input quantities with higher contribution to uncertainty of the surface area. (paper)