Repository logo
 
Publication

A robust flow-based system for the spectrophotometric determination of Cr(VI) in recreational waters

2022-03-23Journal article Open access
Simple item page
dc.contributor.authorRibas, Tânia C. F.
dc.contributor.authorMesquita, Raquel B. R.
dc.contributor.authorMachado, Ana
dc.contributor.authorMiranda, Joana L. A.
dc.contributor.authorMarshall, Graham
dc.contributor.authorBordalo, Adriano
dc.contributor.authorRangel, António O. S. S.
dc.date.accessioned2022-03-29T16:37:49Z
dc.date.available2022-03-29T16:37:49Z
dc.date.issued2022-03-23
dc.description.abstractA flow-based method for the spectrophotometric determination of chromium (VI) in recreational waters with different salinities was developed. Chromium can occur in the environment in different oxidation states with different related physiological properties. With regard to chromium, the speciation is particularly important, as the hexavalent chromium is considered to be carcinogenic. To achieve that purpose, the use of the diphenylcarbazide (DPC) selective colored reaction with the hexavalent chromium was the chosen strategy. The main objective was to develop a direct and simple spectrophotometric method that could cope with the analysis of different types of environmental waters, within different salinity ranges (fresh to marine waters). The potential interference of metal ions, that can usually be present in environmental waters, was assessed and no significant interferences were observed (<10%). For a complete Cr(VI) determination (three replicas) cycle, the corresponding reagents consumption was 75 µg of DPC, 9 mg of ethanol and 54 mg of sulfuric acid. Each cycle takes about 5 min, including the system clean-up. The limit of detection was 6.9 and 12.2 µg L−1 for waters with low and high salt content, respectively. The method was applied for the quantification of chromium (VI) in both fresh and marine water, and the results were in agreement with the reference procedure.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.doi10.3390/molecules27072073pt_PT
dc.identifier.eid85127503302
dc.identifier.issn1420-3049
dc.identifier.pmcPMC9000405
dc.identifier.pmid35408472
dc.identifier.urihttp://hdl.handle.net/10400.14/37184
dc.identifier.wos000783127600001
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectSequential injection analysispt_PT
dc.subjectGlobalFIApt_PT
dc.subjectCr(VI)pt_PT
dc.subjectDPCpt_PT
dc.subjectDynamic water systemspt_PT
dc.titleA robust flow-based system for the spectrophotometric determination of Cr(VI) in recreational waterspt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage10pt_PT
oaire.citation.issue7pt_PT
oaire.citation.startPage1pt_PT
oaire.citation.titleMoleculespt_PT
oaire.citation.volume27pt_PT
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT

Files

Original bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
42472205.pdf
Size:
651.91 KB
Format:
Adobe Portable Document Format
Download

Collections

CBQF - Contribuições em Revistas Científicas / Contribution to Journals