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Application of high-energy polarised beam energy dispersive X-ray fluorescence spectrometry to cadmium determination in saline solutions
Van Meel, K.; Fontas, C.; Van Grieken, R.; Queralt, I.; Hidalgo, M.; Margui, E. (2008). Application of high-energy polarised beam energy dispersive X-ray fluorescence spectrometry to cadmium determination in saline solutions. J. Anal. At. Spectrom. 23(7): 1034-1037. https://dx.doi.org/10.1039/b718382h
In: Journal of Analytical Atomic Spectrometry. Royal Society of Chemistry: London. ISSN 0267-9477; e-ISSN 1364-5544, more
Peer reviewed article  

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  • Van Meel, K., more
  • Fontas, C.
  • Van Grieken, R., more
  • Queralt, I.
  • Hidalgo, M.
  • Margui, E.

Abstract
    In the present work, the analytical performance of a methodology based on a preconcentration using activated thin layers followed by high-energy polarised beam energy-dispersive XRF spectrometry (HE-P-EDXRF) for the determination of trace amounts of Cd in saline solutions is presented. Linear calibration curves were obtained over the range 5–8000 μg L−1 of Cd. When comparing the developed method to the direct analysis of Cd in sea water, the detection limits were improved by several orders of magnitude, with values of 2.25 μg L−1 (Al2O3 target) and 0.075 μg L−1 (CsI target), respectively. The accuracy was checked by analyzing spiked natural sea water at Cd concentrations of 20, 100 and 600 μg L−1 and results were compared to those obtained with anodic stripping voltametry and no significant differences at the 95% confidence level were found. The method has a good reproducibility over the investigated period of time and the precision of the method was better than 10%.

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