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Determination of trace elements in organic specimens by energy‐dispersive x‐ray fluorescence using a fundamental parameters method
Author(s) -
Alvarez M.,
MazoGray V.
Publication year - 1991
Publication title -
x‐ray spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.447
H-Index - 45
eISSN - 1097-4539
pISSN - 0049-8246
DOI - 10.1002/xrs.1300200206
Subject(s) - x ray fluorescence , trace (psycholinguistics) , analytical chemistry (journal) , pellets , fluorescence , excited state , materials science , trace amounts , detector , certified reference materials , x ray , zirconium , radiochemistry , chemistry , detection limit , atomic physics , optics , chromatography , physics , metallurgy , medicine , philosophy , linguistics , alternative medicine , pathology , composite material
A rapid method for the simultaneous determination of trace elements in milk powder by energy‐dispersive x‐ray fluorescence has been developed. The measurement system consists of an Si(Li) detector, an x‐ray tube coupled with zirconium as a secondary target excited source and a personal computer. Milk powder was analysed as pressed pellets and irradiated for 1000 s. Concentrations were determined by a fundamental parameters method. The detection limits are close to 1 ppm for most of the trace elements. The accuracy of the method was ascertained by analysing standard reference materials from the International Atomic Energy Agency. Good agreement was found between the certified and experimental values. Potential areas of applicability of the method are indicated.