ATOMIC ABSORPTION AND ATOMIC EMISSION WITH INDUCTIVE CONNECTED PLASMA AND X-RAY FLUORESCENT DETECTION OF ZINC AND COPPER IN SOIL. (English)

РЕНТГЕНОФЛУОРЕСЕНТНЕ, АТОМНО-АБСОРБЦІЙНЕ ТА АТОМНО-ЕМІСІЙНЕ З ІНДУКТИВНО-ЗВ'ЯЗАНОЮ ПЛАЗМОЮ ВИЗНАЧЕННЯ ЦИНКУ ТА КУПРУМУ В ҐРУНТІ (Ukrainian)

The optimal conditions for the flame atomic absorption determination of Zinc and Copper are found. The optimal concentration of Triton X-100 was 4%, and the sonication time was 15 min. The results of the determination were reliably confirmed by X-ray fluorescence and atomic emission analysis methods with inductively coupled plasma. The use of non-ionic surfactant allowed to reduce the surface tension of the analyzed solution, increase its dispersion and the reducing properties of the flame. This made it possible to increase the sensitivity of the atomic absorption determination of copper by 1.5 times and zinc by 1.6 times. Soil sample preparation was performed using ultrasound and surfactants. The content of analytes in the soil was determined using acetylacetones of copper and zinc as standard samples of the composition, which significantly increased the precision and accuracy of metal determination. By varying the mass of the sample and the "added - found" method, it is shown that the systematic error is insignificant. [ABSTRACT FROM AUTHOR]

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