Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/354563
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dc.contributor.CRUESPUNIVERSIDADE ESTADUAL DE CAMPINASpt_BR
dc.contributor.authorunicampBruns, Roy Edward-
dc.typeArtigopt_BR
dc.titleUV-Vis spectral fingerprinting and chemometric method applied to the evaluation of camellia sinensis leaves from different harvestspt_BR
dc.contributor.authorPauli, Elis Daiane-
dc.contributor.authorBruns, Roy Edward-
dc.contributor.authorScarminio, Ieda Spacino-
dc.subjectChá verdept_BR
dc.subject.otherlanguageGreen teapt_BR
dc.description.abstractUV-Vis spectral fingerprinting was used to discriminate Camellia sinensis leaves of two different harvests and multivariate data analysis was applied to determine the relevant metabolites for separation. First statistical mixture designs of pure ethanol, ethyl acetate, dichloromethane and chloroform solvents as well as their binary, ternary and quaternary mixtures extracted larger varieties and amounts of C. sinensis leaf metabolites than would be obtained from classical solvent extractions. UV-Vis spectral fingerprints of crude extracts were subjected to Orthogonal Signal Correction and Partial Least Squares-Discrimination Analysis (OSC-PLS-DA) for classification. The spectra were all correctly identified and classified, showing that the OSC-PLS-DA model possesses a good predictive ability to separate spectral fingerprints of different harvests. VIP score values showed that bands at 272, 410 and 663 nm were responsible for separation. These metabolites were identified by HPLC-DAD as caffeine and pheophytin a. According to the mixture model, the maximum values of relative abundances of both caffeine and pheophytin a can be extracted with pure dichloromethanept_BR
dc.relation.ispartofAnalytical methodspt_BR
dc.relation.ispartofabbreviationAnal. methodspt_BR
dc.publisher.cityCambridgept_BR
dc.publisher.countryReino Unidopt_BR
dc.publisherRoyal Society of Chemistrypt_BR
dc.date.issued2016-
dc.language.isoengpt_BR
dc.description.volume8pt_BR
dc.description.issuenumber41pt_BR
dc.description.firstpage7537pt_BR
dc.description.lastpage7544pt_BR
dc.rightsAbertopt_BR
dc.sourceWOSpt_BR
dc.identifier.issn1759-9660pt_BR
dc.identifier.eissn1759-9679pt_BR
dc.identifier.doi10.1039/c6ay02462apt_BR
dc.identifier.urlhttps://pubs.rsc.org/en/content/articlelanding/2016/AY/C6AY02462Apt_BR
dc.description.sponsorshipCONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO - CNPQpt_BR
dc.description.sponsorshipCOORDENAÇÃO DE APERFEIÇOAMENTO DE PESSOAL DE NÍVEL SUPERIOR - CAPESpt_BR
dc.description.sponsordocumentnumbernão tempt_BR
dc.description.sponsordocumentnumbernão tempt_BR
dc.date.available2021-01-21T16:32:43Z-
dc.date.accessioned2021-01-21T16:32:43Z-
dc.description.provenanceSubmitted by Mariana Aparecida Azevedo (mary1@unicamp.br) on 2021-01-21T16:32:43Z No. of bitstreams: 0. Added 1 bitstream(s) on 2021-02-16T19:31:21Z : No. of bitstreams: 1 000387602300013.pdf: 762784 bytes, checksum: 66f96511d7839f7a8bf4b6b19a94ee1e (MD5)en
dc.description.provenanceMade available in DSpace on 2021-01-21T16:32:43Z (GMT). No. of bitstreams: 0 Previous issue date: 2016en
dc.identifier.urihttp://repositorio.unicamp.br/jspui/handle/REPOSIP/354563-
dc.contributor.departmentDepartamento de Físico-Químicapt_BR
dc.contributor.unidadeInstituto de Químicapt_BR
dc.subject.keywordUV-Vis spectral fingerprintingpt_BR
dc.subject.keywordCamellia sinensispt_BR
dc.identifier.source000387602300013pt_BR
dc.creator.orcid0000-0002-8234-1129pt_BR
dc.type.formArtigopt_BR
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