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dc.contributor.CRUESPUNIVERSIDADE DE ESTADUAL DE CAMPINASpt_BR
dc.typeArtigo de periódicopt_BR
dc.titlePreparation And Characterization Of A New C18 Urea Phase Based On Titanized Silica.pt_BR
dc.contributor.authorSilva, Cesar Rpt_BR
dc.contributor.authorAiroldi, Claudiopt_BR
dc.contributor.authorCollins, Kenneth Ept_BR
dc.contributor.authorCollins, Carol Hpt_BR
unicamp.authorCesar R Silva, Instituto de Química, Universidade Estadual de Campinas, Caixa Postal 6154, 13084-971 Campinas, SP Brazil.pt_BR
unicamp.author.externalClaudio Airoldi,pt
unicamp.author.externalKenneth E Collins,pt
unicamp.author.externalCarol H Collins,pt
dc.subjectCalorimetry, Differential Scanningpt_BR
dc.subjectMagnetic Resonance Spectroscopypt_BR
dc.subjectMass Spectrometrypt_BR
dc.subjectSilicon Dioxidept_BR
dc.subjectTitaniumpt_BR
dc.description.abstractA new stationary phase containing embedded urea groups (-NH-C(O)-NH-) was prepared by a procedure based on the synthesis of a trifunctional C18 urea-alkoxysilane, followed by modification of titanized silica and further endcapping to evaluate if the embedded group would minimize the higher retention and tailing for basic compounds seen with C18 titanized silica phases. Infrared, 13C and 29Si spectroscopies were employed to characterize the C18-urea titanized silica phase. Chromatographic evaluations used hydrophobic, polar and basic compounds to verify the effects of the polar urea groups embedded in the C18 urea phase. The chromatographic parameters, especially for the separation of basic compounds, compare favorably with those obtained on a C18 titanized silica stationary phase, prepared by silanization of titanized silica with octadecyltrimethoxysilane.en
dc.relation.ispartofJournal Of Chromatography. Apt_BR
dc.relation.ispartofabbreviationJ Chromatogr Apt_BR
dc.date.issued2005-Seppt_BR
dc.identifier.citationJournal Of Chromatography. A. v. 1087, n. 1-2, p. 29-37, 2005-Sep.pt_BR
dc.language.isoengpt_BR
dc.description.volume1087pt_BR
dc.description.firstpage29-37pt_BR
dc.rightsfechadopt_BR
dc.sourcePubMedpt_BR
dc.identifier.issn0021-9673pt_BR
dc.identifier.urlhttp://www.ncbi.nlm.nih.gov/pubmed/16130694pt_BR
dc.date.available2015-11-27T13:02:23Z-
dc.date.accessioned2015-11-27T13:02:23Z-
dc.description.provenanceMade available in DSpace on 2015-11-27T13:02:23Z (GMT). No. of bitstreams: 1 pmed_16130694.pdf: 355350 bytes, checksum: 59369d034ff25f421a801c84dadbc8c2 (MD5) Previous issue date: 2005en
dc.identifier.urihttp://repositorio.unicamp.br/jspui/handle/REPOSIP/196393-
dc.identifier.idPubmed16130694pt_BR
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