Abstract:Многоэлементный анализ пищевой продукции, в т.ч. напитков, важен при оценке содержания полезных и токсичных для организма элементов. В данной работе рассмотрены основные проблемы и их решения при анализе сахаросодержащих напитков методом рентгенофлуоресцентной спектрометрии с полным внешним отражением (TXRF). Органическая матрица сахарозы вызывает определенные сложности как при подготовке проб, так и при обработке данных измерений для TXRF. Рассмотрены наиболее распространенные для TXRF способы подготовки проб… Show more
“…The S2 PICOFOX (Bruker Nano GmbH, Germany), a benchtop spectrometer, has been used in the TXRF laboratory of the Centre for Geodynamics and Geo chronology since 2009. Initially, the TXRF laboratory was specialized in the analysis of liquid samples as water [Pashkova, Revenko, 2013a, 2013bPashkova et al, 2013], brines [Pashkova, Revenko, 2015;Pashkova et al, 2013], milk [Smagunova, Pashkova, 2013;Pashkova et al, 2018b], tea [Maltsev et al, 2019a[Maltsev et al, , 2021a, and beverages [Maltsev et al, 2019b[Maltsev et al, , 2022. Nowadays we also use TXRF for different solid samples with a complex mineral matrix.…”
Unlike conventional X-ray fluorescence spectrometry, the total-reflection X-ray fluorescence spectrometry is not a widespread and routine method for analyzing solid samples with mineral matrix, but it has a great potential for geochemical, geological, and archaeological studies. Rapid multi-elemental analysis of very small sample amounts can be performed by the internal standard method which does not require the matrix-matched reference materials. This is an undoubted advantage of the TXRF method over the conventional X-ray fluorescence method, especially if there is a limited available sample amount and a lack of well-characterized reference materials. This paper presents our experience with the application of TXRF spectrometry in the elemental analysis of apatite, ceramics, sediments, ores, and nodules. Special attention has been paid to the sample preparation procedure because it is one of the main sources of errors in the analysis. Preparing thin homogeneous specimen from the solid sample with a complex mineral matrix is not easy. Sample preparation strategy should be chosen considering the features of an analytical object, the content of the elements to be determined, and the accuracy required for a reliable interpretation. Consideration is being given to the examples of the preparation of a suspension for rapid analysis of ores and sediments, and to the original techniques of chemical decomposition for apatite and ceramics.
“…The S2 PICOFOX (Bruker Nano GmbH, Germany), a benchtop spectrometer, has been used in the TXRF laboratory of the Centre for Geodynamics and Geo chronology since 2009. Initially, the TXRF laboratory was specialized in the analysis of liquid samples as water [Pashkova, Revenko, 2013a, 2013bPashkova et al, 2013], brines [Pashkova, Revenko, 2015;Pashkova et al, 2013], milk [Smagunova, Pashkova, 2013;Pashkova et al, 2018b], tea [Maltsev et al, 2019a[Maltsev et al, , 2021a, and beverages [Maltsev et al, 2019b[Maltsev et al, , 2022. Nowadays we also use TXRF for different solid samples with a complex mineral matrix.…”
Unlike conventional X-ray fluorescence spectrometry, the total-reflection X-ray fluorescence spectrometry is not a widespread and routine method for analyzing solid samples with mineral matrix, but it has a great potential for geochemical, geological, and archaeological studies. Rapid multi-elemental analysis of very small sample amounts can be performed by the internal standard method which does not require the matrix-matched reference materials. This is an undoubted advantage of the TXRF method over the conventional X-ray fluorescence method, especially if there is a limited available sample amount and a lack of well-characterized reference materials. This paper presents our experience with the application of TXRF spectrometry in the elemental analysis of apatite, ceramics, sediments, ores, and nodules. Special attention has been paid to the sample preparation procedure because it is one of the main sources of errors in the analysis. Preparing thin homogeneous specimen from the solid sample with a complex mineral matrix is not easy. Sample preparation strategy should be chosen considering the features of an analytical object, the content of the elements to be determined, and the accuracy required for a reliable interpretation. Consideration is being given to the examples of the preparation of a suspension for rapid analysis of ores and sediments, and to the original techniques of chemical decomposition for apatite and ceramics.
This review covers characteristics and potential applications of various versions of the X-ray fluorescence (XRF) spectrometry for analyzing both liquid and solid samples. Particular emphasis is given to research published within the past decade, as information on XRF’s previous applications can be found in earlier reviews and monographs. The results of experiments on determining fundamental atomic parameters, such as mass absorption coefficients, fluorescence yields, transition probabilities for the emission of specific lines of elements, and nonradiative transition probabilities. Additionally, the review addresses the capabilities of newly designed models of XRF spectrometers developed in recent years. The application of total reflection X-ray fluorescence spectrometry for diverse samples is examined in greater detail. Furthermore, the document presents data on the utilization of XRF in investigating nanoparticles of some typical materials. These particles exhibit qualitatively novel properties and have become a focal point of nanotechnology, an area rapidly developing in the last few decades.
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