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Molecules. 2018 Aug 19;23(8). pii: E2076. doi: 10.3390/molecules23082076.

Using XRF and ICP-OES in Biosorption Studies.

Author information

1
Department of Advanced Material Technologies, Faculty of Chemistry, Wrocław University of Science and Technology, Smoluchowskiego 25, 50-372 Wrocław, Poland. katarzyna.chojnacka@pwr.edu.pl.
2
Department of Advanced Material Technologies, Faculty of Chemistry, Wrocław University of Science and Technology, Smoluchowskiego 25, 50-372 Wrocław, Poland. Mateusz.Samoraj@grupaazoty.com.
3
Department of Advanced Material Technologies, Faculty of Chemistry, Wrocław University of Science and Technology, Smoluchowskiego 25, 50-372 Wrocław, Poland. Lukasz.Tuhy@grupaazoty.com.
4
Department of Advanced Material Technologies, Faculty of Chemistry, Wrocław University of Science and Technology, Smoluchowskiego 25, 50-372 Wrocław, Poland. izabela.michalak@pwr.edu.pl.
5
Department of Advanced Material Technologies, Faculty of Chemistry, Wrocław University of Science and Technology, Smoluchowskiego 25, 50-372 Wrocław, Poland. malgorzata.mironiuk@pwr.edu.pl.
6
Department of Dentofacial Orthopeadics and Orthodontics, Division of Facial Abnormalities, Medical University of Wrocław, ul. Krakowska 25, 50-425Wrocław, Poland. mikulewicz.marcin@gmail.com.

Abstract

In this work, a method of recalculation of results of X-ray fluorescence (XRF) technique to Inductively Coupled Plasma-Optical Emission Spectroscopy (ICP-OES) method was elaborated for biosorption studies. Equations that calibrate XRF to ICP-OES were determined, as a biosorbent strawberry, blackcurrant and raspberry seeds after supercritical CO₂ extraction were used. ICP-OES showed a better precision and lower detection limits than XRF. The latter technique is cheaper, requires minimal sample preparation and gives faster results. Linear regression of the data gave almost 1:1 correlations without additional correction (for Cu r² = 0.9998, Mn r² = 0.807, Zn r² = 0.979). Calibration and quantification of intensities of XRF was obtained using ICP-OES measurements after samples digestion with HNO₃ in a microwave system. High positive correlations were estimated for Cu, Mn, Zn. It was demonstrated that XRF technique can be used together with other well established techniques (ICP-OES) to produce quantitative data from biosorption studies. Elaboration of cheap and quick analytical methodology is an important aspect in development of new processes and products based on biosorption process.

KEYWORDS:

ICP-OES; XRF; biomass; biosorption; multielemental analysis; surface concentration

PMID:
30126247
DOI:
10.3390/molecules23082076
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