Cr speciation in water samples by dispersive liquid-liquid microextraction combined with total reflection X-ray fluorescence spectrometry
dc.contributor.author
dc.date.accessioned
2016-05-30T11:47:46Z
dc.date.available
2016-05-30T11:47:46Z
dc.date.issued
2016-01-01
dc.identifier.issn
0584-8547
dc.identifier.uri
dc.description.abstract
A novel method based on dispersive liquid-liquid microextraction (DLLME) and total-reflection X-ray fluorescence spectrometry (TXRF) is proposed for the determination and preconcentration of inorganic Cr species (Cr(VI) and Cr(III)) in water samples. Parameters affecting the extraction procedure for Cr speciation (pH, sample volume, disperser solvent, complexing agent, organic solvent, temperature) and TXRF conditions (sample volume, drying mode, measurement time, internal standardization) have been carefully evaluated to ensure the highest sensitivity for Cr determination. It was found that the minimum Cr content that can be detected was 0.8 μg L- 1. This value is significantly lower than the maximum Cr content permissible in drinking waters and it is better or comparable with those obtained in other published works based on the use of solid phase extraction or liquid phase microextraction in combination with atomic absorption spectrometry techniques. A good linearity (R2 = 0.9937) was obtained in the range of 5 to 4000 μg L- 1 demonstrating the suitability of the DLLME + TXRF for both the analysis of drinking and waste water samples. Additional advantages of the DLLME-TXRF systems include the use of very small amount of reagents and the simplicity and low cost of operation of the benchtop instrument used (no cooling media and gas consumption are needed)
dc.description.sponsorship
The authorswant to thank the financial support for this project from the Spanish National Research Program (Project ref. CGL2010-22168-C03-01 and Project ref. CGL2013-48802-C3-2-R)
dc.format.mimetype
application/pdf
dc.language.iso
eng
dc.publisher
Elsevier
dc.relation
info:eu-repo/grantAgreement/MICINN//CGL2010-22168-C03-01/ES/APLICACION DE AGUA NO CONVENCIONAL (TRATADA-DESALADA) Y FANGOS PROCEDENTES DE DEPURADORAS URBANAS Y SU IMPACTO EN EL MEDIO ACUIFERO Y SUELOS. ESTUDIOS DE CAMPO Y LABORATORIO/
info:eu-repo/grantAgreement/MINECO//CGL2013-48802-C3-2-R/ES/EVALUACION DE LOS EFECTOS DEL USO DE AGUAS NO CONVENCIONALES EN LA ZONA NO SATURADA Y SATURADA. ENFOQUE MULTIDISCIPLINAR/
dc.relation.isformatof
Reproducció digital del document publicat a: http://dx.doi.org/10.1016/j.sab.2015.11.001
dc.relation.ispartof
© Spectrochimica acta. Part B, Atomic spectroscopy, 2016, vol. 115, p. 46-51
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Articles publicats (D-Q)
dc.rights
Tots els drets reservats
dc.subject
dc.title
Cr speciation in water samples by dispersive liquid-liquid microextraction combined with total reflection X-ray fluorescence spectrometry
dc.type
info:eu-repo/semantics/article
dc.rights.accessRights
info:eu-repo/semantics/embargoedAccess
dc.embargo.terms
Cap
dc.date.embargoEndDate
info:eu-repo/date/embargoEnd/2026-01-01
dc.type.version
info:eu-repo/semantics/publishedVersion
dc.identifier.doi
dc.identifier.idgrec
024270
dc.contributor.funder
dc.relation.ProjectAcronym