title: Analysis of biodiesel and biodiesel-petrodiesel blends by high performance thin layer chromatography combined with easy ambient sonic-spray ionization mass spectrometry.
abstract: High performance thin layer chromatography (HPTLC) combined with on-spot detection and characterization via easy ambient sonic-spray ionization mass spectrometry (EASI-MS) is applied to the analysis of biodiesel (B100) and biodiesel-petrodiesel blends (BX). HPTLC provides chromatographic resolution of major components whereas EASI-MS allows on-spot characterization performed directly on the HPTLC surface at ambient conditions. Constituents (M) are detected by EASI-MS in a one component-one ion fashion as either [M + Na](+) or [M + H](+). For both B100 and BX samples, typical profiles of fatty acid methyl esters (FAME) detected as [FAME + Na](+) ions allow biodiesel typification. The spectrum of the petrodiesel spot displays a homologous series of protonated alkyl pyridines which are characteristic for petrofuels (natural markers). The spectrum for residual or admixture oil spots is characterized by sodiated triglycerides [TAG + Na](+). The application of HPTLC to analyze B100 and BX samples and its combination with EASI-MS for on-spot characterization and quality control is demonstrated.
authors.affiliation: ThoMSon Mass Spectrometry Laboratory, Institute of Chemistry, State University of Campinas, 13084-970 Campinas, SP, Brazil.
authors.forename: Livia S
authors.initials: LS
authors.lastname: Eberlin
authors.forename: Patricia V
authors.initials: PV
authors.lastname: Abdelnur
authors.forename: Alan
authors.initials: A
authors.lastname: Passero
authors.forename: Gilberto F
authors.initials: GF
authors.lastname: de Sa
authors.forename: Romeu J
authors.initials: RJ
authors.lastname: Daroda
authors.forename: Vanderlea
authors.initials: V
authors.lastname: de Souza
authors.forename: Marcos N
authors.initials: MN
authors.lastname: Eberlin
mesh_terms: D001674:Bioelectric Energy Sources / Q000145:classification; D056804:Biofuels / Q000032:analysis*; D002851:Chromatography, High Pressure Liquid; D002855:Chromatography, Thin Layer / Q000379:methods*; D013058:Mass Spectrometry / Q000295:instrumentation / Q000379:methods*; D004364:Pharmaceutical Preparations / Q000032:analysis; D021241:Spectrometry, Mass, Electrospray Ionization
chemical_list: D056804:Biofuels; D004364:Pharmaceutical Preparations