AI Article Synopsis
- Researchers analyzed dried marine macroalgae (Fucus serratus, Palmaria palmata, and Ulva lactuca) for trace elements using a non-destructive Niton FP-XRF spectrometer.
- Detection limits for trace elements like arsenic (As) and lead (Pb) were very low (<5 μg/g) for some species, while others had higher limits for cadmium (Cd), antimony (Sb), and tin (Sn).
- The study found a strong correlation between the trace element concentrations measured by XRF and those obtained through traditional ICP-MS methods, indicating XRF's potential for in-field monitoring of coastal macroalgae.
Article Abstract
Samples of dried marine macroalgae (Fucus serratus, Palmaria palmata and Ulva lactuca) have been analysed for trace elements by a novel, non-destructive approach involving a Niton field-portable-X-ray fluorescence (FP-XRF) spectrometer configured in a low density plastics mode with thickness correction. Detection limits for a 200-s counting time ranged from <5 μg g for As and Pb in F. serratus and As in P. palmata to several tens of μg g for Cd, Sb and Sn in all species tested. Arsenic, Cu, Pb and Zn were detected by the XRF in samples collected from a protected beach (n = 18) and in samples therefrom that had been exposed to additional aqueous elements in combination (n = 72) with concentrations returned (in μg g) ranging from 3.9 to 39.7 for As, 13.0 to 307 for Cu, 6.1 to 14.7 for Pb and 12.5 to 522 for Zn. Independent measurements of trace elements in the macroalgae by ICP-MS following nitric acid digestion revealed a direct and significant proportionality with concentrations returned by the XRF, with slopes of the XRF-ICP relationships (As = 1.0; Cu = 2.3; Pb = 2.4; Zn = 1.7) that can be used to calibrate the instrument for direct measurements. The approach shows potential for the in situ monitoring of macroalgae in coastal regions that is currently being investigated.
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| http://dx.doi.org/10.1016/j.envpol.2016.09.049 | DOI Listing |
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