Open AccessDevelopment of the reference material of nanoporous zeolite
Author(s) -
Е. П. Собина
Publication year - 2020
Publication title -
ètalony. standartnye obrazcy
Language(s) - English
Resource type - Journals
ISSN - 2687-0886
DOI - 10.20915/2687-0886-2020-16-1-25-41
Subject(s) - nanoporous , zeolite , sorption , certified reference materials , metrology , materials science , porosity , adsorption , volume (thermodynamics) , differential scanning calorimetry , process engineering , chemical engineering , nanotechnology , chemistry , composite material , chromatography , thermodynamics , catalysis , organic chemistry , mathematics , engineering , physics , statistics , detection limit
The article is devoted to the development of a reference material of the sorption roperties of nanoporous zeolite, which ensures metrological traceability of measurement results to the State primary measurement standard of units for specific gas adsorption, specific surface area, specific pore volume, pore size, open porosity and gas permeability coefficient of solid substances and materials GET 210-2019. Thepaperpresentsthe results of theoretical and experimental studies on optimizing the conditions of sample preparation (thermal training) of the reference material using the thermogravimetric method and differential scanning calorimetry, coupled with mass spectrometric detection of the evolved gases (TG-DSC–MS analysis). The results of establishing the metrological characteristics of the reference material are described, including standard uncertainty due to the method of determining the certified value, as well as standard uncertainties from heterogeneity and instability. The GSO 10734–2015 reference material of the sorption properties of nanoporous zeolite (Zeolite SO UNIIM) has certified metrological characteristics: specific surface area (500–1200) m 2 /g;specificpore volume (0.10.5) cm 3 /g;the predominant pore diameter (0.4–0.9) nm; specific argon adsorption (0.001–20.0) mol/kg. Thereference material is designed to calibrate measuring instruments and to control accuracy of results of sorption characteristics of nanoporous materials measurements; it can be used to certify appropriate measurement procedures, to test measuring instruments and reference materials for type approval and other types of metrological control.