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Please use this identifier to cite or link to this item: http://hdl.handle.net/20.500.12128/8696
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dc.contributor.authorJanik, Paulina-
dc.contributor.authorZawisza, Beata-
dc.contributor.authorTalik, Ewa-
dc.contributor.authorSitko, Rafał-
dc.date.accessioned2019-03-28T12:50:36Z-
dc.date.available2019-03-28T12:50:36Z-
dc.date.issued2018-
dc.identifier.citationMicrochimica Acta, Vol. 185, Issue 2 (2018), art. no. 117pl_PL
dc.identifier.issn0026-3672-
dc.identifier.urihttp://hdl.handle.net/20.500.12128/8696-
dc.description.abstractNovel adsorbents are described for the preconcentration of chromium(VI). Graphene oxide (GO) was modified with various amino silanes containing one, two, or three nitrogen atoms in the molecule. These include 3-aminopropyltriethoxysilane (APTES), N-(3-trimethoxysilylpropyl)ethylenediamine (TMSPEDA), and N1-(3-trimethoxysilylpropyl)diethylenetriamine (TMSPDETA). The resulting GO derivatives were characterized by scanning electron microscopy, X-ray photoelectron spectroscopy, and energy-dispersive X-ray fluorescence spectrometry (EDXRF). Adsorption studies show that these GO based sorbents are highly selective for Cr(VI) in the presence of Cr(III) at pH 3.5. Although the amino silanes applied in modification of GO contain different numbers of nitrogen atoms, the maximum adsorption capacities of GO derivatives are very similar (13.3–15.1 mg·g−1). Such results are in accordance with spectroscopy studies which show that the amount of amino silanes attached to GO decreases in the order of APTES > TMSPEDA > TMSPDETA. The APTES-modified GO was applied to selective and sensitive extraction of Cr(VI) ions prior to quantitation by low-power EDXRF using the Cr Kα line. The Cr(VI) ions need not be eluted from the solid adsorbent. The method has a 0.17 ng·mL−1 detection limit, and the recovery is 99.7 ± 2.2% at a spiking level of 10 ng·mL−1. The method was successfully applied to the determination of Cr(VI) in water samples.pl_PL
dc.language.isoenpl_PL
dc.rightsUznanie autorstwa 3.0 Polska*
dc.rights.urihttp://creativecommons.org/licenses/by/3.0/pl/*
dc.subjectspeciationpl_PL
dc.subjectnanomaterialpl_PL
dc.subjectsilanizationpl_PL
dc.subjectsolid-phase extractionpl_PL
dc.subjectSPEpl_PL
dc.subjectdispersive micro-solid phase extractionpl_PL
dc.subjectDMSPEpl_PL
dc.subjectdichromatepl_PL
dc.subjectremovalpl_PL
dc.titleSelective adsorption and determination of hexavalent chromium ions using graphene oxide modified with amino silanespl_PL
dc.typeinfo:eu-repo/semantics/articlepl_PL
dc.identifier.doi10.1007/s00604-017-2640-2-
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