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Trace determination of uranium preconcentrated using graphene oxide by total reflection X‐ray fluorescence spectrometry.
- Source :
-
XRS: X-ray Spectrometry . Sep/Oct2019, Vol. 48 Issue 5, p366-374. 9p. - Publication Year :
- 2019
-
Abstract
- A new method based on dispersive microsolid phase extraction using graphene oxide (GO) as a solid adsorbent and total reflection X‐ray fluorescence (TXRF) spectrometry is proposed for trace determination of uranium. In the developed methodology, a suspension of GO was injected into uranium‐spiked multielement solutions including rubidium; after filtration, the membrane filter with collected GO was placed in a small volume of internal standard acid solution and the eluent containing uranium was deposited onto a fluorine resin‐coated slide glass, which is a disposable sample stage. Using GO was effective for removal of rubidium from the measurement solution to avoid interference between Rb Kα peak and U Lα peak. The high enrichment factor of 150 enables obtaining uranium detection limits of 0.042, 0.087, and 0.12 μg L−1 for ionic strength of 0.01, 0.1, and 1 mol L−1, respectively. Such low detection limits were obtained by using a benchtop TXRF spectrometer with 5‐min measurement. The proposed method is suitable for trace uranium determination in water, including high salinity samples. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00498246
- Volume :
- 48
- Issue :
- 5
- Database :
- Academic Search Index
- Journal :
- XRS: X-ray Spectrometry
- Publication Type :
- Academic Journal
- Accession number :
- 138274252
- Full Text :
- https://doi.org/10.1002/xrs.3032