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XRF techniques to quantify heavy metals in vegetables at low detection limits

Sample preparation techniques, measurement routines and custom calibrations were developed and optimized for the quantification of Pb and additional heavy metals in dried and wet consumable vegetable tissues via WD-XRF and/or portable ED-XRF spectroscopy. After mitigating matrix influences fundament...

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Detalles Bibliográficos
Autores principales: Byers, Harris L., McHenry, Lindsay J., Grundl, Timothy J.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Elsevier 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6694857/
http://dx.doi.org/10.1016/j.fochx.2018.100001
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author Byers, Harris L.
McHenry, Lindsay J.
Grundl, Timothy J.
author_facet Byers, Harris L.
McHenry, Lindsay J.
Grundl, Timothy J.
author_sort Byers, Harris L.
collection PubMed
description Sample preparation techniques, measurement routines and custom calibrations were developed and optimized for the quantification of Pb and additional heavy metals in dried and wet consumable vegetable tissues via WD-XRF and/or portable ED-XRF spectroscopy. After mitigating matrix influences fundamental to XRF quantification of heavy metals in a carbon matrix, the custom measurement and calibration routines were capable of detecting and quantifying Pb in dried prepared vegetable samples at concentrations relevant to the World Health Organization. The viability of each calibration was evaluated with measurements of vegetables grown in metals-rich garden soil collected from residential properties. Although robust calibrations for dried vegetables were obtained with WD-XRF, the slight compromise in the precision and accuracy of measurements with portable ED-XRF is offset by the portability of this technology. Heavy metal concentrations in wet coarsely-homogenized raw consumable vegetable tissues were quantified; however, further work is needed to test the viability of ED-XRF calibrations.
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spelling pubmed-66948572019-08-20 XRF techniques to quantify heavy metals in vegetables at low detection limits Byers, Harris L. McHenry, Lindsay J. Grundl, Timothy J. Food Chem X Article Sample preparation techniques, measurement routines and custom calibrations were developed and optimized for the quantification of Pb and additional heavy metals in dried and wet consumable vegetable tissues via WD-XRF and/or portable ED-XRF spectroscopy. After mitigating matrix influences fundamental to XRF quantification of heavy metals in a carbon matrix, the custom measurement and calibration routines were capable of detecting and quantifying Pb in dried prepared vegetable samples at concentrations relevant to the World Health Organization. The viability of each calibration was evaluated with measurements of vegetables grown in metals-rich garden soil collected from residential properties. Although robust calibrations for dried vegetables were obtained with WD-XRF, the slight compromise in the precision and accuracy of measurements with portable ED-XRF is offset by the portability of this technology. Heavy metal concentrations in wet coarsely-homogenized raw consumable vegetable tissues were quantified; however, further work is needed to test the viability of ED-XRF calibrations. Elsevier 2018-12-15 /pmc/articles/PMC6694857/ http://dx.doi.org/10.1016/j.fochx.2018.100001 Text en © 2018 The Authors http://creativecommons.org/licenses/by/4.0/ This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Byers, Harris L.
McHenry, Lindsay J.
Grundl, Timothy J.
XRF techniques to quantify heavy metals in vegetables at low detection limits
title XRF techniques to quantify heavy metals in vegetables at low detection limits
title_full XRF techniques to quantify heavy metals in vegetables at low detection limits
title_fullStr XRF techniques to quantify heavy metals in vegetables at low detection limits
title_full_unstemmed XRF techniques to quantify heavy metals in vegetables at low detection limits
title_short XRF techniques to quantify heavy metals in vegetables at low detection limits
title_sort xrf techniques to quantify heavy metals in vegetables at low detection limits
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6694857/
http://dx.doi.org/10.1016/j.fochx.2018.100001
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