Mostrar el registro sencillo del ítem

dc.contributor.authorHernandez, Felix
dc.contributor.authorPortoles, Tania
dc.contributor.authorPitarch, Elena
dc.contributor.authorLopez, Francisco
dc.date.accessioned2011-08-25T09:48:33Z
dc.date.available2011-08-25T09:48:33Z
dc.date.issued2008-12
dc.identifier.issn1076-5174
dc.identifier.urihttp://hdl.handle.net/10234/27264
dc.description.abstractThe potential of GC-TOF MS for screening anthropogenic organic contaminants in human breast adipose tissues has been investigated. Initially a target screening was performed for a list of 125 compounds which included persistent halogen pollutants (OC pesticides, PCBs, PBDEs), PAHs, alkylphenols, and a notable number of pesticides from the different fungicide, herbicide and insecticide families. Searching for target pollutants was done by evaluating the presence of up to five representative ions for every analyte, all measured at accurate mass (20 mDa mass window). The experimental ion abundance ratios were then compared to those of reference standards for confirmation. Sample treatment consisted of an extraction with hexane and subsequent normal-phase HPLC or SPE clean-up. The fat-free LC fractions were then investigated by GC-TOF MS. Full-spectral acquisition and accurate mass data generated by GC-TOF MS also allowed the investigation of non-target compounds using appropriate processing software to manage MS data. Identification was initially based on library fit using commercial nominal mass libraries. This was followed by comparing the experimental accurate masses of the most relevant ions with the theoretical exact masses with calculations made using the elemental composition calculator included in the software. The application of both target and non-target approaches to around 40 real samples allowed the detection and confirmation of several target pollutants including p,p’- DDE, HCB, and some PCBs and PAHs. Several non-target compounds that could be considered anthropogenic pollutants were also detected. These included 3,5-di-tert-butyl-4-hydroxy-toluene (BHT) and its metabolite 3,5-di-tert-butyl-4-hydroxybenzaldehyde (BHT-CHO), dibenzylamine, n-butyl benzenesulfonamide, some naphthalene-related compounds and several PCBs isomers not 2included in the target list. As some of the compounds detected are xenoestrogens the methodology developed in this paper could be useful in human breast cancer research
dc.format.extent30 p.
dc.language.isoeng
dc.publisherJohn Wiley & Sons
dc.relation.isPartOfJournal of mass spectrometry, vol. 44, no. 1 (Dec. 2008), pp. 1-11
dc.rights© 2008 John Wiley & Sons
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/*
dc.subjectHigh-resolution time-of-flight mass spectrometry
dc.subjectGas chromatography
dc.subjectAdipose tissue
dc.subjectAnthropogenic contaminants
dc.subjectScreening and confirmatio
dc.subject.lcshMass spectrometry
dc.subject.lcshCromatografia de gasos
dc.subject.otherEspectrometria de masses
dc.subject.otherCromatografia de gasos
dc.titleSearching for anthropogenic contaminants in human breast adipose tissues using gas chromatography-time-of-flight mass spectrometry
dc.typeinfo:eu-repo/semantics/article
dc.identifier.doihttp://dx.doi.org/10.1002/jms.1538
dc.rights.accessRightsinfo:eu-repo/semantics/openAccess
dc.relation.publisherVersionhttps://analyticalsciencejournals.onlinelibrary.wiley.com/doi/full/10.1002/jms.1538
dc.type.versioninfo:eu-repo/semantics/submittedVersion
dc.type.versioninfo:eu-repo/semantics/submittedVersionca_CA


Ficheros en el ítem

Thumbnail

Este ítem aparece en la(s) siguiente(s) colección(ones)

Mostrar el registro sencillo del ítem