Browsing by Author Sparrapan, R

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PreviewIssue DateTitleAuthor(s)AdvisorType
2003Reactions of gaseous acylium ions with 1,3-dienes: further evidence for polar [4+2(+)] Diels-Alder cycloadditionLemos, AB; Sparrapan, R; Eberlin, MN-Artigo de periódico
2004Intrinsic reactivity of gaseous halocarbocations toward model aromatic compoundsSorrilha, AEPM; Santos, LS; Gozzo, FC; Sparrapan, R; Augusti, R; Eberlin, MN-Artigo de periódico
2006Desorption sonic spray ionization for (high) voltage-free ambient mass spectrometryHaddad, R; Sparrapan, R; Eberlin, MN-Artigo de periódico
1998Oxygen atom transfer to positive ions: A novel reaction of ozone in the gas phaseMendes, MA; Moraes, LAB; Sparrapan, R; Eberlin, MN; Kostiainen, R; Kotiaho, T-Artigo de periódico
1998Locating the charge site in heteroaromatic cationsCarvalho, M; Gozzo, FC; Mendes, MA; Sparrapan, R; Kascheres, C; Eberlin, MN-Artigo de periódico
2006Distonoid ionsTomazela, DM; Sabino, AA; Sparrapan, R; Gozzo, FC; Eberlin, MN-Artigo de periódico
2000Double transacetalization of diacylium ionsSparrapan, R; Mendes, MA; Eberlin, MN-Artigo de periódico
2004Direct assignment of positional isomers by mass spectrometry: ortho, meta and para acyl and amidyl anilines and phenols and derivativesda Rocha, LW; Sparrapan, R; Augusti, R; Eberlin, MN-Artigo de periódico
2005Cyclization reactions of acylium and thioacylium ions with isocyanates and isothiocyanates: Gas phase synthesis of 3,4-dihydro-2,4-dioxo-2H-1,3,5-oxadiazinium ionsMeurer, EC; Sparrapan, R; Tomazela, DM; Eberlin, MN; Augusti, R-Artigo de periódico
2011Quantitation of drugs via molecularly imprinted polymer solid phase extraction and electrospray ionization mass spectrometry: benzodiazepines in human plasmaFigueiredo, EC; Sparrapan, R; Sanvido, GB; Santos, MG; Arruda, MAZ; Eberlin, MN-Artigo de periódico
2008Quantitation of trace phenolic compounds in water by trap-and-release membrane introduction mass spectrometry after acetylationSparrapan, R; Eberlin, MN; Alberici, RM-Artigo de periódico
2011Natural and artificial markers of gasoline detected by membrane introduction mass spectrometrySparrapan, R; Eberlin, MN; Alberici, RM-Artigo de periódico
2006Electrophilic aromatic nitration: Understanding its mechanism and substituent effectsde Queiroz, JF; Carneiro, JWD; Sabino, AA; Sparrapan, R; Eberlin, MN; Esteves, PM-Artigo de periódico
1998Gas-phase chemistry of the sulfur hexafluoride fragment ions SFn+ (n=0-5) and SFn2+ (n=2, 4). Ab initio thermochemistry of novel reactions of S+. and SF+Sparrapan, R; Mendes, MA; Ferreira, IPP; Eberlin, MN; Santos, C; Nogueira, JC-Artigo de periódico
2003Gas-phase polar [4(+)+2] cycloaddition with ethyl vinyl ether: a structurally diagnostic ion-molecule reaction for 2-azabutadienyl cationsMeurer, EC; Sparrapan, R; Eberlin, MN-Artigo de periódico
2000Headspace membrane introduction mass spectrometry for trace level analysis of VOCs in soil and other solid matrixesMendes, MA; Sparrapan, R; Eberlin, MN-Artigo de periódico
2008Easy ambient sonic-spray ionization-membrane interface mass spectrometry for direct analysis of solution constituentsHaddad, R; Sparrapan, R; Kotiaho, T; Eberlin, MN-Artigo de periódico
1999Polyetherimide-silicone: a 10 mu m ultrathin composite membrane for faster and more sensitive membrane introduction mass spectrometry analysisAlberici, R; Sparrapan, R; Eberlin, MN; Windmoller, D; Augusti, R-Artigo de periódico
2000Formal fusion of a pyrrole ring onto 2-pyridyl and 2-pyrimidyl cations: One-step gas-phase synthesis of indolizine and its derivativesSparrapan, R; Mendes, MA; Carvalho, M; Eberlin, MN-Artigo de periódico
2001Transacetalization with gaseous carboxonium and carbosulfonium ionsMoraes, LAB; Mendes, MA; Sparrapan, R; Eberlin, MN-Artigo de periódico