Detection of lead in Zea mays by dual‐energy X‐ray microtomography at the SYRMEP beamline of the ELETTRA synchrotron and by atomic absorption spectroscopy |
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Authors: | Lucia Reale Jozef Kaiser Loretta Pace Antonia Lai Francesco Flora Antonella Angelosante Bruno Adele Tucci Paola Zuppella Lucia Mancini Giuliana Tromba Fabrizio Ruggieri Maria Fanelli Radomir Malina Miroslav Liška Anna Poma |
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Affiliation: | 1. Faculty of Sciences, University of L'Aquila, gc‐LNGS INFN, INFM Coppito, 67010 L'Aquila, Italy;2. Institute of Physical Engineering, Brno University of Technology, Technicka 2896/2, 61669 Brno, Czech Republic;3. ENEA, UTS FIS Dipartimento Innovazione, Settore Fisica Applicata, Via E. Fermi 45, 00044 Frascati, Italy;4. [Corrected author name Antonella Angelosante Bruno appears here after initial online publication.];5. Sincrotrone Trieste SpcA, Strada Statale 14‐km 163,5 AREA Science Park, Basovizza, 34012 Trieste, Italy;6. Dipartimento di Chimica, Ingegneria Chimica e Materiali, Università dell'Aquila, L'Aquila 67010, Italy |
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Abstract: | This study is related to the application of the X‐ray dual‐energy microradiography technique together with the atomic absorption spectroscopy (AAS) for the detection of lead on Zea mays stem, ear, root, and leaf samples. To highlight the places with lead intake, the planar radiographs taken with monochromatic X‐ray radiation in absorption regime with photon energy below and above the absorption edge of a given chemical element, respectively, are analyzed and processed. To recognize the biological structures involved in the intake, the dual‐energy images with the lead signal have been compared with the optical images of the same Z. mays stem. The ear, stem, root, and leaf samples have also been analyzed with the AAS technique to measure the exact amount of the hyperaccumulated lead. The AAS measurement revealed that the highest intake occurred in the roots while the lowest in the maize ears and in the leaf. It seems there is a particular mechanism that protects the seeds and the leaves in the intake process. Microsc. Res. Tech., 2010. © 2009 Wiley‐Liss, Inc. This article was published online on 1 December 2009. An error was subsequently identified. This notice is included in the online and print version to indicate that both have been corrected 19 February 2010. |
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Keywords: | dual‐energy X‐ray analysis intake biodisposable Zea mays stem lead |
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