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dc.contributor.CRUESPUniversidade Estadual de Campinaspt_BR
dc.typeArtigo de periódicopt_BR
dc.titleStatistical mixture design - Varimax factor optimization for selective compound extraction from plant materialpt_BR
dc.contributor.authorSoares, PKpt_BR
dc.contributor.authorBruns, REpt_BR
dc.contributor.authorScarminio, ISpt_BR
unicamp.authorSoares, Patricia Kaoti Bruns, Roy E. Univ Estadual Campinas, Inst Quim, BR-13083970 Campinas, SP, Brazilpt_BR
unicamp.authorScarminio, Ieda S. Univ Estadual Londrina, Dept Quim, Lab Quimiometria Ciencias Nat, BR-86051990 Londrina, PR, Brazilpt_BR
dc.subjectvarimax rotationpt_BR
dc.subjectprincipal component analysispt_BR
dc.subjectmixture designspt_BR
dc.subjectErythrina speciosa Andrews leavespt_BR
dc.subjectsolvent extractionpt_BR
dc.subject.wosMultivariate Curve Resolutionpt_BR
dc.subject.wosExtended Rotationpt_BR
dc.description.abstractVarimax-transformed chromatograms of compounds extracted from Erythrina speciosa Andrews leaves by simplex centroid design mixtures of dichloromethane, hexane, ethanol and acetone are reported and compared with principal component results. Six varimax factors were investigated focusing on the three main groups of extracted compounds with retention times of 1.7, 3.1 and 6.6 min. Varimax models provide chromatographic loading profiles that are simpler than their principal component counterparts. Furthermore varimax score models in terms of extraction medium compositions are simpler to interpret. The first varimax model results in an optimum extraction mixture of 71% dichloromethane-29% acetone although substitution of acetone by ethanol results in an almost identical extraction profile. The second varimax score model predicts optimum extraction binary mixtures with hexane proportions ranging from 50 to 100% for complementary proportions of either acetone or ethanol. The third varimax factor provides a response surface that is very similar to the one found for the third PC. Confirmatory experiments were performed to validate the model predictions. (C) 2008 Elsevier B.V. All rights
dc.relation.ispartofAnalytica Chimica Actapt_BR
dc.relation.ispartofabbreviationAnal. Chim. Actapt_BR
dc.publisherElsevier Science Bvpt_BR 14pt_BR
dc.identifier.citationAnalytica Chimica Acta. Elsevier Science Bv, v. 613, n. 1, n. 48, n. 55, 2008.pt_BR
dc.sourceWeb of Sciencept_BR
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dc.description.provenanceMade available in DSpace on 2015-11-26T16:04:56Z (GMT). No. of bitstreams: 2 WOS000255486900005.pdf: 438602 bytes, checksum: eb58083f656ba06ccdf0ce1d22b11a60 (MD5) WOS000255486900005.pdf.txt: 29022 bytes, checksum: c5df1cfc7d66e61af589eaa8f9fffb62 (MD5) Previous issue date: 2008en
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