Possibilities of the X-ray Fluorescence Analysis
of Dairy Products with the Help of the Spectrometer
with Total External Reflectance
G. V. PASHKOVA1, A. N. SMAGUNOVA2, A. L. FINKELSTEIN3
1 Institute of the Earth's Crust, Siberian Branch of the Russian Academy of Sciences
2 Irkutsk State University
3 Vinоgradov Institute of Geochemistry, Siberian Branch of the Russian Academy of Sciences
pashkova.gv@yandex.ru
Keywords: X-ray fluorescence analysis with total external reflectance, milk, dairy products
Pages: 271-280
Abstract
Effect of the surface density of the emitter on the results of X-ray fluorescence analysis of diary products was studied theoretically and experimentally with the spectrometer having the geometry of total external reflectance (XRD TER). The models of the dependence of the error of milk sample preparation on the level of milk dilution with water and on the volume of aliquot deposited on the substrate were obtained with the help of mathematical planning of experiments. The physical interpretation of these models is taken into account. The models of the dependence of the detection limit of elements in milk on the above-indicated factors were obtained. A procedure of non-destructive determination of P, S, Cl, K, Ca, Fe, Ni, Cu, Zn, Br, Rb, Sr, Pb in milk; and in diary products with the help of XRD TER was developed. Metrological investigation of the developed procedure was carried out.
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