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Tytuł: Speciation of Chromium in Alkaline Soil Extracts by an Ion-Pair Reversed Phase HPLC-ICP MS Method
Autorzy: Leśniewska, Barbara
Godlewska-Żyłkiewicz, Beata
Słowa kluczowe: ultrasound-assisted extraction
ion pair reversed phase HPLC coupled with inductively coupled plasma mass spectrometry
ionic chromium species
neutral and non-polar chromium fractions
alkaline soil extract
Data wydania: 2019
Data dodania: 26-maj-2023
Wydawca: MDPI
Źródło: Molecules, Volume 24 (2019), pp. 1-16
Abstrakt: The aim of this work was to study by a hyphenated HPLC-ICP MS technique the chromium species released during alkaline extraction of various soils collected from a contaminated area of an old tannery. An ultrasound-assisted extraction procedure using 0.1 mol L−1 Na2CO3 solution was developed for the release of chromium species from the soil. The chromium species in the soil extracts were separated on a C8 column using EDTA and TBAH solution as a mobile phase. The use of an ICP-QQQ MS spectrometer in tandem mass configuration (MS/MS) combined with an octopole reaction system (ORS3 ) pressurized with helium allows one to eliminate spectral interferences during Cr determination in the soil extracts. The detection limit of the procedure was 0.08 µg L−1 for Cr(III) and 0.09 µg L−1 for Cr(VI) species. The trueness of the IP RP HPLC-ICP MS method was proved by an analysis of CRM 041 and CRM 060. The advantage of the proposed method is the analysis of soil extracts without their preliminary neutralization, which limits the losses of Cr(VI) due to the reduction process. The analysed soils mainly contained chromium in immobile forms (94.6–98.5% of the total Cr content). In all alkaline soil extracts mostly the Cr(VI) form was found, but in the extract of organic soils Cr(III) was also present. This arose from the reduction of Cr(VI) species by organic matter (humic acids) and Fe(II). The amount of formed Cr(III) species was dependent on the type of soil (content of organic matter, Mn and Fe) and its moistness. For the first time, the presence of neutral and non-polar chromium fractions in the soil extracts was also demonstrated. It was found that reliable speciation analysis results could be obtained for mineral soils.
Afiliacja: Barbara Leśniewska - Institute of Chemistry, University of Bialystok
Beata Godlewska-Żyłkiewicz - Institute of Chemistry, University of Bialystok
Sponsorzy: The work was financed from the funds of the Ministry of Science and Higher Education in the framework of subsidies for the maintenance of research potential granted to the Faculty of Biology and Chemistry of the University of Bialystok. The ICP-MS instrument was funded by EU, as a part of the Operational Programme Development of Eastern Poland 2007–2013, project POPW.01.03.00-20-034/09-00.
DOI: 10.3390/molecules24061172
ISSN: 1420-3049
metadata.dc.identifier.orcid: 0000-0002-7127-5701
Typ Dokumentu: Article
Właściciel praw: © 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license
Występuje w kolekcji(ach):Artykuły naukowe (WChem)

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