Development of certif ed reference material of the sorption characteristics of titanium dioxide

Abstract

The results of work to expand the range of reference material of sorption properties are presented, namely, to create a reference material of the sorption properties of titanium dioxide, the use of materials based on which is widespread in many areas of industry. Two materials based on titanium dioxide were presented as candidates for CRM, and preliminary studies were carried out to establish the qualitative and quantitative composition, particle size, density, as well as parameters for preparing the material for research by gas adsorption. Based on the results, a material with a lower impurity content and particle size was selected. The metrological characteristics of the standard material were established using a reference installation from the State primary standard of units of specific gas adsorption, specifi csurface area, specific pore volume, pore size, open porosity and gas permeability coefficient GET 210-2019. The range of certified values of the specific surface area 10–100 m2/g, the range of values of the specific pore volume 0.05– 0.5 cm3/g, the range of values of the average pore diameter 2–30 nm and the range of values of specific nitrogen adsorption at liquid nitrogen temperature in the relative pressure range from 0.9·10–3 to 0.992 (0.01–20.00 mol/kg). The use of CRM 12390-2023 during calibrations, verifi cations, and tests in order to approve the type of instruments for measuring sorption properties at various stages of titanium dioxide production will improve the quality of products based on it.