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Analytical performance of benchtop total reflection X-ray fluorescence instrumentation for multielemental analysis of wine samples

Recent technological improvements have led to a widespread adoption of benchtop total reflection X-ray fluorescence systems (TXRF) for analysis of liquid samples. However, benchtop TXRF systems usually present limited sensitivity compared with high-scale instrumentation which can restrict its application in some fields. The aim of the present work was to evaluate and compare the analytical capabilities of two TXRF systems, equipped with low power Mo and W target X-ray tubes, for multielemental analysis of wine samples. Using the Mo-TXRF system, the detection limits for most elements were one order of magnitude lower than those attained using the W-TXRF system. For the detection of high Z elements like Cd and Ag, however, W-TXRF remains a very good option due to the possibility of K-Lines detection. Accuracy and precision of the obtained results have been evaluated analyzing spiked real wine samples and comparing the TXRF results with those obtained by inductively coupled plasma emission spectroscopy (ICP-OES). In general, good agreement was obtained between ICP-OES and TXRF results for the analysis of both red and white wine samples except for light elements (i.e., K) which TXRF concentrations were underestimated. However, a further achievement of analytical quality of TXRF results can be achieved if wine analysis is performed after dilution of the sample with de-ionized water

Thisworkwas supported by the Spanish National Research Program (Project ref. CGL2013-48802-C3-2-R)

© Spectrochimica acta. Part B, Atomic spectroscopy, 2016, vol. 120, p. 37-43

Elsevier

Author: Dalipi, Rogerta
Marguí Grabulosa, Eva
Borgese, Laura
Bilo, Fabjola
Depero, Laura E.
Date: 2016 June 1
Abstract: Recent technological improvements have led to a widespread adoption of benchtop total reflection X-ray fluorescence systems (TXRF) for analysis of liquid samples. However, benchtop TXRF systems usually present limited sensitivity compared with high-scale instrumentation which can restrict its application in some fields. The aim of the present work was to evaluate and compare the analytical capabilities of two TXRF systems, equipped with low power Mo and W target X-ray tubes, for multielemental analysis of wine samples. Using the Mo-TXRF system, the detection limits for most elements were one order of magnitude lower than those attained using the W-TXRF system. For the detection of high Z elements like Cd and Ag, however, W-TXRF remains a very good option due to the possibility of K-Lines detection. Accuracy and precision of the obtained results have been evaluated analyzing spiked real wine samples and comparing the TXRF results with those obtained by inductively coupled plasma emission spectroscopy (ICP-OES). In general, good agreement was obtained between ICP-OES and TXRF results for the analysis of both red and white wine samples except for light elements (i.e., K) which TXRF concentrations were underestimated. However, a further achievement of analytical quality of TXRF results can be achieved if wine analysis is performed after dilution of the sample with de-ionized water
Thisworkwas supported by the Spanish National Research Program (Project ref. CGL2013-48802-C3-2-R)
Format: application/pdf
ISSN: 0584-8547
Document access: http://hdl.handle.net/10256/13124
Language: eng
Publisher: Elsevier
Collection: MINECO/PE 2013-2016/CGL2013-48802-C3-2-R
Reproducció digital del document publicat a: http://dx.doi.org/10.1016/j.sab.2016.04.001
Articles publicats (D-Q)
Is part of: © Spectrochimica acta. Part B, Atomic spectroscopy, 2016, vol. 120, p. 37-43
Rights: Tots els drets reservats
Subject: Espectroscòpia de raigs X
X-ray spectroscopy
Espectroscòpia de fluorescència
Photoelectron spectroscopy
Title: Analytical performance of benchtop total reflection X-ray fluorescence instrumentation for multielemental analysis of wine samples
Type: info:eu-repo/semantics/article
Repository: DUGiDocs

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