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Determination of thallium in sulphide geological samples by x-ray fluorescence spectrometry

✍ Scribed by Dragan Mihajlović; Trajče Stafilov

Publisher
John Wiley and Sons
Year
1998
Tongue
English
Weight
78 KB
Volume
27
Category
Article
ISSN
0049-8246

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✦ Synopsis

A method for determination of thallium in sulphide geological samples by x-ray Ñuorescence spectrometry is presented. The samples were prepared in form of glass discs by fusion with lithium tetraborate and with potassium nitrate as an oxidizing agent. The limit of determination was 0.016% (w/w) Tl, with the possibility of decreasing it to 0.006% (w/w) Tl by using the method of addition. Elements such as Zn, Cd, Cu, Fe and Pb, present as major matrix constituents, did not inÑuence the intensity of background radiation on the position of the Tl line. In Lb 1 this way it was possible to determine small quantities of thallium in ore samples simultaneously with other elements. The standard deviation of the determination of small contents of thallium [ in the range 0.020-0.10% (w/w) was 0.0016% . The sensitivity of method was 600 counts s-1 per 1% (w/w) Tl.

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