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dc.contributor.CRUESPUniversidade Estadual de Campinaspt_BR
dc.typeArtigo de periódicopt_BR
dc.titleAssessing Biodegradation in the Llanos Orientales Crude Oils by Electrospray Ionization Ultrahigh Resolution and Accuracy Fourier Transform Mass Spectrometry and Chemometric Analysispt_BR
dc.contributor.authorVaz, BGpt_BR
dc.contributor.authorSilva, RCpt_BR
dc.contributor.authorKlitzke, CFpt_BR
dc.contributor.authorSimas, RCpt_BR
dc.contributor.authorNascimento, HDLpt_BR
dc.contributor.authorPereira, RCLpt_BR
dc.contributor.authorGarcia, DFpt_BR
dc.contributor.authorEberlin, MNpt_BR
dc.contributor.authorAzevedo, DApt_BR
unicamp.authorVaz, Boniek G. Klitzke, Clecio F. Simas, Rosineide C. Lopes Nascimento, Heliara D. Pereira, Rosana C. L. Eberlin, Marcos N. Univ Estadual Campinas, Lab ThoMSon Espectrometria Massas, Inst Quim, BR-13083970 Campinas, SP, Brazilpt_BR
unicamp.authorVaz, Boniek G. Univ Fed Goias, Inst Quim, BR-74007970 Goiania, Go, Brazilpt_BR
unicamp.authorSilva, Renzo C. Azevedo, Debora A. Univ Fed Rio de Janeiro, Inst Quim, Ilha Fundao, BR-21949900 Rio De Janeiro, RJ, Brazilpt_BR
unicamp.authorPereira, Rosana C. L. Petroleo Brasileiro SA Petrobras, CENPES, BR-21941901 Rio De Janeiro, RJ, Brazilpt_BR
unicamp.authorGarcia, Diego F. ICP ECOPETROL, Inst Colombiano Petr, Bucaramanga, Colombiapt_BR
dc.subject.wos2-dimensional Gas-chromatographypt_BR
dc.subject.wosPolar Nso Compoundspt_BR
dc.subject.wosNaphthenic Acidspt_BR
dc.subject.wosLiaohe Basinpt_BR
dc.description.abstractFocusing on the O-2 class, a set of crude oils from Llanos Orientales Basin, Colombia, were classified in terms of biodegradation levels using negative ion mode electrospray Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS) and chemometric analysis. The O-2 class, which is mainly composed of naphthenic carboxylic acids, was monitored because these polar crude oil constituents are known to be substantially affected by microbial activity. Principal component analysis (PCA) applied on the O-2 profile was able to classify the crude oils into three groups: biodegraded, mixture, and non-biodegraded. From the relative abundances of the O-2 class, a clear trend on acid distribution could be directly correlated with biodegradation: a rising in abundance of saturated acids with low double-bond equivalent (DBE) values (despite the lowering observed for fatty acids with DBE = 1), expressed by the A/C index. The combined use of two indexes, the A/C index and a new index also based on saturated acid abundances, the SA index, is proposed as an effective strategy to monitor biodegradation. This approach showed to be particularly useful to fill blanks on discrete biodegradation classification and when samples are actually composed of a mixture of oils with contrasting biodegradation levels. Results are in good agreement with predictions based on classical hydrocarbon biomarker
dc.relation.ispartofEnergy & Fuelspt_BR
dc.relation.ispartofabbreviationEnergy Fuelspt_BR
dc.publisherAmer Chemical Socpt_BR
dc.identifier.citationEnergy & Fuels. Amer Chemical Soc, v. 27, n. 3, n. 1277, n. 1284, 2013.pt_BR
dc.sourceWeb of Sciencept_BR
dc.description.sponsorshipCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)pt_BR
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado do Rio de Janeiro (FAPERJ)pt_BR
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)pt_BR
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)pt_BR
dc.description.sponsorshipPetrobras S/Apt_BR
dc.description.sponsorship1Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)pt_BR
dc.description.sponsorship1Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)pt_BR
dc.description.sponsorship1Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)pt_BR
dc.description.provenanceMade available in DSpace on 2014-07-30T13:51:02Z (GMT). No. of bitstreams: 0 Previous issue date: 2013en
dc.description.provenanceMade available in DSpace on 2015-11-26T16:43:52Z (GMT). No. of bitstreams: 0 Previous issue date: 2013en
Appears in Collections:Unicamp - Artigos e Outros Documentos

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