Development of an Analytical Method for Determination of Major Elements by Energy-Dispersive X-Ray Fluorescence Spectrometry
Department of Analytical Chemistry, Institute of Chemical Sciences, P.J. Šafárik University, Košice, Slovakia
The present work aims to be a methodical tool and frame information for an engineering analyst in pursuing the validation of similar analytical methods. A method was developed for determination of major elements in solid environmental matrices (soils, ores, river and lake sediments). The determination has been carried out using fused lithium tetraborate pearls. The obtained validation characteristics correspond with those required for analytical validation of the method. The present method shows repeatability within 5 % and accuracy 85??????115 % in the whole determination range. Detection limits for metal oxides ranged from 0.02 to 0.20 %. The RSDs in a long-term stability study did not exceed 2 %. The validation results and other tests confirm suitability of the ED XRF spectrometry for analysis of major elements in solids of environmental and geological origin and compatibility with the methods used in reference laboratories. The method is practical in terms of sample preparation, costs and time saving.
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