Improvement and modification of the energy-dispersive X-ray fluorescence method for the determination of metal elements in cement leachates – A chemometric approach

Authors

  • Nevenka Mijatović nstitute for Testing of Materials IMS, Vojvode Mišića Bl. 43, 11000 Belgrade, Serbia
  • Anja Terzić Institute for Testing of Materials IMS, Vojvode Mišića Bl. 43, 11000 Belgrade, Serbia
  • Lato Pezo Institute of General and Physical Chemistry, University of Belgrade, StudentskiTrg 12-16, 11000 Belgrade, Serbia
  • Ljiljana Miličić Institute for Testing of Materials IMS, Vojvode Mišića Bl. 43, 11000 Belgrade, Serbia
  • Dragana Živojinović Faculty of Technology and Metallurgy, University of Belgrade, Karnegijeva 4, 11000 Belgrade, Serbia

DOI:

https://doi.org/10.2298/JSC200501067M

Keywords:

in-house validation, mineral additives, cluster analysis, ICP-OES, EDXRF, building materials

Abstract

A modification of an analytical procedure for the energy-dispersive X-ray fluorescence (EDXRF) quantification of ten chemical elements (As, Ba, Cd, Co, Cr, Cu, Mo, Ni, Pb and Zn) in the leachates obtained from cement binders was developed. Twenty-nine testing samples were used in the experi­ment. All samples were based on Portland cement. Fly ash of different origin, zeolite and bentonite were employed as mineral additives in the cement bin­ders. Distilled water was used as the leachate. Validation of the modified EDXRF procedure was conducted in terms of limits of detection and quantific­ation, working range, linearity, selectivity, precision, trueness, and robustness. Traceability of the procedure was established using certified reference mat­erials. Uncertainty of measurement was confirmed via an “in-house” laboratory validation approach. The expanded uncertainties for the ten analysed elements were obtained for the entire working range of the EDXRF method. Robustness of the modified EDXRF procedure was assessed by means of a chemometric in-house approach. The results obtained by the modified X-ray fluorescence method were additionally correlated to those acquired by inductively coupled plasma optical emission spectrometry to confirm that EDXRF could be used as an effective and reliable alternative method for analysis of cement leachates.

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Published

2020-12-23

How to Cite

[1]
N. Mijatović, A. Terzić, L. Pezo, L. Miličić, and D. Živojinović, “Improvement and modification of the energy-dispersive X-ray fluorescence method for the determination of metal elements in cement leachates – A chemometric approach”, J. Serb. Chem. Soc., vol. 85, no. 12, pp. 1605–1619, Dec. 2020.

Issue

Section

Analytical Chemistry

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