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Standard Reference Material of Fluorite FM
Author(s) -
DEMPIR J.,
VALCHA Z.
Publication year - 1982
Publication title -
geostandards newsletter
Language(s) - English
Resource type - Journals
eISSN - 1751-908X
pISSN - 0150-5505
DOI - 10.1111/j.1751-908x.1982.tb00341.x
Subject(s) - fluorite , homogeneity (statistics) , strontium , homogeneous , relative standard deviation , standard deviation , barium , raw material , copper , standard error , quartz , mineralogy , analytical chemistry (journal) , chemistry , mathematics , materials science , metallurgy , statistics , chromatography , detection limit , organic chemistry , combinatorics
Standard reference material of fluorite FM, consisting chiefly of fluorite, quartz and baryte, was prepared by the Institute of Mineral Raw Materials in Kutná Hora (Czechoslovakia). The homogeneity of the pulverised SRM was checked by X‐ray fluorescence spectrometry from counts corresponding to the amounts of iron, copper, barium, strontium and titanium. The SRM was considered homogeneous if the “between bottles” variance was not significantly greater than the “within bottles” variance and further, if the error caused by heterogeneity of the SRM was less than one third of the error of an analytical determination carried out in a routine manner. Analytical results from 26 laboratories were processed following the recommended procedure of CMEA‐countries which includes: Testing the normality of results, eliminating out‐lying results and computing the arithmetic means, estimates of standard deviations and the confidence intervals of the means. Attested values for 17 components and non‐attested values for 30 components and/or elements are reported.