Simple method for Cr(VI) determination by liquid-liquid microextraction combined with total reflection X-ray fluorescence spectrometry: Application to water samples and industrial extracts
dc.contributor.author
dc.date.accessioned
2023-04-26T11:45:23Z
dc.date.available
2023-04-26T11:45:23Z
dc.date.issued
2023-06
dc.identifier.issn
0584-8547
dc.identifier.uri
dc.description.abstract
In the present contribution, a simple and inexpensive method for the determination of hexavalent chromium in aqueous solutions was developed. The analytical methodology consists of the combined use of a low cost Cr(VI) isolation procedure followed by the analysis using total reflection X-ray spectrometry (TXRF). The liquid-liquid microextraction procedure (LLME) used is based on the formation of an ion-pair between the cationic part of the surfactant cetyltrimethylammonium bromide (CTAB) and the corresponding anionic Cr(VI) species, which is extracted in few microliters of chloroform. TXRF analysis can be performed directly by deposition of 15 μL of the preconcentrated sample on a sample carrier, without any additional sample treatment.
Experimental parameters affecting Cr(VI) extraction and TXRF analysis were studied in detail. Under optimum conditions, a good linearity was obtained in the range of 5–5000 μg/L with a limit of detection for hexavalent chromium of 0.9 μg/L. This fact opens the possibility of Cr determination in aqueous samples characterized by different concentration levels. The methodology was successfully applied for the determination of Cr(VI) species in different type of water matrices (tap, well, river and sea water) as well as industrial aqueous samples including in industrial waste water from a galvanic industry and aqueous clinker extracts. For comparison purposes, the determination of Cr(VI) in industrial samples was also carried out by using the colorimetric method EPA Method 7196
dc.description.sponsorship
This work was supported by the grant PID2021-127326OB-I00 funded by MCIN/AEI/ 10.13039/501100011033
Open Access funding provided thanks to the CRUE-CSIC agreement with Elsevier
dc.format.mimetype
application/pdf
dc.language.iso
eng
dc.publisher
Elsevier
dc.relation
PID2021-127326OB-I00
dc.relation.isformatof
Reproducció digital del document publicat a: https://doi.org/10.1016/j.sab.2023.106682
dc.relation.ispartof
Spectrochimica Acta Part B: Atomic Spectroscopy, 2023, vol. 204, art. núm. 106682
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Articles publicats (D-Q)
dc.rights
Attribution-NonCommercial-NoDerivatives 4.0 International
dc.rights.uri
dc.subject
dc.title
Simple method for Cr(VI) determination by liquid-liquid microextraction combined with total reflection X-ray fluorescence spectrometry: Application to water samples and industrial extracts
dc.type
info:eu-repo/semantics/article
dc.rights.accessRights
info:eu-repo/semantics/openAccess
dc.relation.projectID
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2021-2023/PID2021-127326OB-I00/ES/EVALUACIÓN DE DOS SISTEMAS BASADOS EN PROCESOS NATURALES COMO TRATAMIENTOS TERCIARIOS DE AGUAS RESIDUALES PARA REUTILIZACIÓN. ENFOQUE EN LA ELIMINACIÓN DE MICROCONTAMINANTES/
dc.type.version
info:eu-repo/semantics/publishedVersion
dc.identifier.doi
dc.contributor.funder
dc.type.peerreviewed
peer-reviewed
dc.relation.FundingProgramme
dc.relation.ProjectAcronym
dc.identifier.eissn
1873-3565