Evaluation of quantitative synchrotron radiation micro-X-ray fluorescence in rice grain

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Author(s)Limmer, Matt A.
Author(s)Webb, Samuel M.
Author(s)Seyffertha, Angelia L.
Date Accessioned2023-05-16T18:03:50Z
Date Available2023-05-16T18:03:50Z
Publication Date2023-03-15
DescriptionThis article was originally published in Journal of Synchrotron Radiation. The version of record is available at: https://doi.org/10.1107/S1600577523000747
AbstractConcentrations of nutrients and contaminants in rice grain affect human health, specifically through the localization and chemical form of elements. Methods to spatially quantify the concentration and speciation of elements are needed to protect human health and characterize elemental homeostasis in plants. Here, an evaluation was carried out using quantitative synchrotron radiation microprobe X-ray fluorescence (SR-µXRF) imaging by comparing average rice grain concentrations of As, Cu, K, Mn, P, S and Zn measured with rice grain concentrations from acid digestion and ICP-MS analysis for 50 grain samples. Better agreement was found between the two methods for high-Z elements. Regression fits between the two methods allowed quantitative concentration maps of the measured elements. These maps revealed that most elements were concentrated in the bran, although S and Zn permeated into the endosperm. Arsenic was highest in the ovular vascular trace (OVT), with concentrations approaching 100 mg kg−1 in the OVT of a grain from a rice plant grown in As-contaminated soil. Quantitative SR-µXRF is a useful approach for comparison across multiple studies but requires careful consideration of sample preparation and beamline characteristics.
SponsorUse of the Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, is supported by the US Department of Energy, Office of Science, Office of Basic Energy Sciences (contract no. DE-AC02-76SF00515). This research was also funded by the US National Science Foundation, Directorate for Engineering (grant no. 1930806 awarded to ALS and MAL) and the US National Institute of Food and Agriculture (grant no. NIFA-2018-67019-27796 awarded to ALS).
CitationLimmer, Matt A., Samuel M. Webb, and Angelia L. Seyfferth. “Evaluation of Quantitative Synchrotron Radiation Micro-X-Ray Fluorescence in Rice Grain.” Journal of Synchrotron Radiation 30, no. 2 (2023): 407–16. https://doi.org/10.1107/S1600577523000747.
ISSN1600-5775
URLhttps://udspace.udel.edu/handle/19716/32754
Languageen_US
PublisherJournal of Synchrotron Radiation
Keywordsarsenic
Keywordsmetal(loid)s
Keywordsrice bran
Keywordsrice grain
Keywordssynchrotron radiation microprobe X-ray fluorescence
KeywordsSR-µXRF
TitleEvaluation of quantitative synchrotron radiation micro-X-ray fluorescence in rice grain
TypeArticle
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