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The chemical determination of zirconium in polymctallic silica matrices is difficult and lengthy, hccause of the necessary prior separations of interfering ele-men&i. The analysis of sands is cvcn more troublesome because the chemical composition of sands varies greatly and consiclerablc amounts of iron and titanium arc present as well as admixtures of calcium and rare-earth clcmcnts. The method presented below permits zirconium to be determined in the prcscnce of varying amounts of iron and titanium. ASALYSIS 01: %II~COI;IUXl-REAHISG SASIIS 13ccause of the presence of several metals in the test materials, a nondispcrsive X-ray fluorescence method was chosen. The characteristic S-ray K-series of zirconium was excited by a io%d source emitting the characteristic KAg series of 22.6 keV. Such radiation, the energy of which is slightly above the absorption edge of zirconium (x8.0 kcV) gave a good excitation yield. The activity of the source amounted to ca. 30 or xoo PC depending on the particular procedure. A simple standard apparatus was used, consisting of a H.V.-supply. a kryptonfilled proportional counter with a resolution of about 18% at 6.4 keV, a pulse amplifier and scaler. A mu

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Author

B. Holyńska; L. Langer

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0003-2670)

Published

1968

Language

EN

Field

Chemistry (Physical Sciences)