Publication:
Comparison of two derivatizing agents for the simultaneous determination of selenite and organoselenium species by gas chromatography and atomic emission detection after preconcentration using solid-phase microextraction

Simple item page
dc.contributor.authorCampillo Seva, Natalia
dc.contributor.authorPeñalver Soler, Rosa María
dc.contributor.authorHernández Córdoba, Manuel
dc.contributor.authorPérez-Sirvent, Carmen
dc.contributor.authorMartínez Sánchez, María José
dc.contributor.departmentQuímica Analítica
dc.date.accessioned2021-11-11T09:01:27Z
dc.date.available2021-11-11T09:01:27Z
dc.date.issued2007-09-21
dc.description.abstractTwo methods for the simultaneous determination of selenite and two organoselenium compounds, dimethylselenide (DMSe) and dimethyldiselenide (DMDSe), are proposed. Both methods involve sample preconcentration by solid-phase microextraction (SPME) and capillary gas chromatography coupled to atomic emission detection (GC-AED). The main difference between the methods is the derivatizing agent used to complex the inorganic species: sodium tetraethylborate and 4,5-dichloro-1,2-phenylenediamine. The parameters affecting the derivatization and preconcentration steps, chromatographic separation as well as detection of the compounds were optimized. Direct immersion (DI) mode and a relatively long extraction time were selected for the method involving the formation of the piazselenol complex, better sensitivity being achieved for the three analytes under study. In this case, detection limits ranged between 3 to 25 ng L-1, depending on the compound. Headspace mode (HS) and extraction times of 20 min were selected for the method involving tetraalkylborate, and detection limits of between 7.3 and 55 ng L-1 were obtained. DMSe and Se(IV) were found in several of the water samples analyzed at concentrations of 0.07-1.0 ng mL-1.es
dc.formatapplication/pdfes
dc.format.extent29es
dc.identifier.citationJournal of Chromatography A, 1165 (1–2), 2007, 191-199
dc.identifier.doi10.1016/j.chroma.2007.07.064
dc.identifier.urihttp://hdl.handle.net/10201/113923
dc.languageenges
dc.publisherELSEVIERes
dc.relationProject CTQ2006-08037/BQU del Ministerio de Educación y Cienciaes
dc.relation.publisherversionhttps://doi.org/10.1016/j.chroma.2007.07.064es
dc.rightsinfo:eu-repo/semantics/openAccesses
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 Internacional*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/*
dc.subjectSelenitees
dc.subjectDimethylselenide
dc.subjectDimethyldiselenide
dc.subjectSodium tetraethylborate
dc.subject4,5-dichloro-1,2-phenylenediamine
dc.subjectSolid-phase microextraction (SPME)
dc.subjectGas Chromatography – Atomic Emission Detection (GC-AED)
dc.subjectWaters
dc.subject.otherCDU::5 - Ciencias puras y naturales::54 - Química::543 - Química analíticaes
dc.titleComparison of two derivatizing agents for the simultaneous determination of selenite and organoselenium species by gas chromatography and atomic emission detection after preconcentration using solid-phase microextractiones
dc.typeinfo:eu-repo/semantics/articlees
dspace.entity.typePublicationes
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
JChromA-2007-Postprint.pdf
Size:
359.06 KB
Format:
Adobe Portable Document Format
Description:
Accepted version of 10.1016/j.chroma.2007.07.064
Download
License bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
license.txt
Size:
1.39 KB
Format:
Item-specific license agreed upon to submission
Description:
Download
Collections
Artículos