METHOD FOR DETERMINING CHECKED CONTAINMENT LEVEL OF COMPONENT IN SYNTHETIC STANDARD SAMPLES OF COMPOSITION OF AEROSOLS, LOADED ON A FILTER

摘要

FIELD: analytical chemistry.;SUBSTANCE: method includes preparing synthetic mixture of substances with calculation of containment of p_oi component I in one unit of mass of created standard sample, while for each j of n samples of standard aerosol samples, produced from methyl-cellulose films of similar chemical composition, mass m_j and intensiveness I_ji of lines of x-ray spectrum of fluorescence of i component are measured, linear dependence is produced between I_ji and m_j, checked value μ_ji for each sample of standard sample is determined from mathematical formula μ_ji=p_0im_j and its error from formula where Δ_Mi - error, connected with determining of concentration of component i in source materials of mixture, used for preparing mixture; S_r0i - remaining relative standard deviation, characterizing dispersion of experimental points around a line; t(α, f) - Student criterion for value level α=0,05 and number of freedom degrees f=n-2; n - number of standard sample items.;EFFECT: possible increase of precision of detection of checked containment level μ_i for each j of n samples of standard samples of composition of aerosols, loaded on a filter.;3 ex, 2 dwg