Article (Scientific journals)
Fast and accurate procedure for the determination of Cr(VI) in solid samples by isotope dilution mass spectrometry.
Fabregat Cabello, Neus; Rodriguez-Gonzalez, Pablo; Castillo, Angel et al.
2012In Environmental Science and Technology, 46 (22), p. 12542-9
Peer Reviewed verified by ORBi
 

Files


Full Text
Paper cromo final.pdf
Publisher postprint (1.02 MB)
Request a copy

All documents in ORBi are protected by a user license.

Send to



Details



Keywords :
Chromatography, Ion Exchange/methods; Chromium/analysis/chemistry; Edetic Acid/analysis/chemistry; Environmental Monitoring/methods; Mass Spectrometry/methods; Microwaves; Oxidation-Reduction; Time Factors
Abstract :
[en] We present here a new environmental measurement method for the rapid extraction and accurate quantification of Cr(VI) in solid samples. The quantitative extraction of Cr(VI) is achieved in 10 minutes by means of focused microwave assisted extraction using 50 mmol/L Ethylendiamintetraacetic acid (EDTA) at pH 10 as extractant. In addition, it enables the separation of Cr species by anion exchange chromatography using a mobile phase which is a 1:10 dilution of the extracting solution. Thus, neutralization or acidification steps which are prone to cause interconversion of Cr species are not needed. Another benefit of using EDTA is that it allows to measure Cr(III)-EDTA complex and Cr(VI) simultaneously in an alkaline extraction solution. The application of a 10 minutes focused microwave assisted extraction (5 min at 90 degrees C plus 5 min at 110 degrees C) has been shown to quantitatively extract all forms of hexavalent chromium from the standard reference materials (SRM) candidate NIST 2700 and NIST 2701. A double spike isotope dilution mass spectrometry (IDMS) procedure was employed to study chromium interconversion reactions. It was observed that the formation of a Cr(III)-EDTA complex avoided Cr(III) oxidation for these two reference materials. Thus, the use of a double spiking strategy for quantification is not required and a single spike IDMS procedure using isotopically enriched Cr(VI) provided accurate results.
Disciplines :
Environmental sciences & ecology
Author, co-author :
Fabregat Cabello, Neus ;  Université de Liège > Département de pharmacie > Chimie médicale
Rodriguez-Gonzalez, Pablo
Castillo, Angel
Malherbe, Julien
Roig-Navarro, Antoni F.
Garcia Alonso, J. Ignacio
Long, Stephen E.
Language :
English
Title :
Fast and accurate procedure for the determination of Cr(VI) in solid samples by isotope dilution mass spectrometry.
Publication date :
2012
Journal title :
Environmental Science and Technology
ISSN :
0013-936X
eISSN :
1520-5851
Publisher :
American Chemical Society, Washington, United States - District of Columbia
Volume :
46
Issue :
22
Pages :
12542-9
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 12 January 2018

Statistics


Number of views
55 (2 by ULiège)
Number of downloads
0 (0 by ULiège)

Scopus citations®
 
36
Scopus citations®
without self-citations
31
OpenCitations
 
33

Bibliography


Similar publications



Contact ORBi