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Using XRF and ICP-OES in Biosorption Studies

Authors :
Katarzyna Chojnacka
Mateusz Samoraj
Łukasz Tuhy
Izabela Michalak
Małgorzata Mironiuk
Marcin Mikulewicz
Source :
Molecules, Vol 23, Iss 8, p 2076 (2018)
Publication Year :
2018
Publisher :
MDPI AG, 2018.

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.

Details

Language :
English
ISSN :
14203049
Volume :
23
Issue :
8
Database :
Directory of Open Access Journals
Journal :
Molecules
Publication Type :
Academic Journal
Accession number :
edsdoj.387256de317b4cb8ae71123d06230ea8
Document Type :
article
Full Text :
https://doi.org/10.3390/molecules23082076