title: Quantitative analysis of biodiesel in blends of biodiesel and conventional diesel by comprehensive two-dimensional gas chromatography and multivariate curve resolution.
abstract: In this paper, a method to determine the composition of blends of biodiesel with mineral diesel (BXX) by multivariate curve resolution with Alternating Least Squares (MRC-ALS) combined to comprehensive two-dimensional gas chromatography with Flame Ionization Detection (GC×GC-FID) is presented. Chromatographic profiles of BXX blends produced with biodiesels from different sources were used as input data. An initial evaluation carried out after multiway principal component analysis (MPCA) was used to reveal regions of the chromatograms were the signal was likely to be dependent on the concentration of biodiesel, regardless its vegetable source. After this preliminary step MCR-ALS modeling was carried out only using relevant parts of the chromatograms. The resulting procedure was able to predict accurately the concentration of biodiesel in the BXX samples regardless of its origin.
authors.affiliation: Institute of Chemistry, University of Campinas (IQ/UNICAMP), Brazil; Instituto Nacional de Ciência e Tecnologia em Bioanalítica (INCTBio), Brazil.
authors.forename: Noroska Gabriela Salazar
authors.initials: NG
authors.lastname: Mogollon
authors.forename: Fabiana Alves de Lima
authors.initials: FA
authors.lastname: Ribeiro
authors.forename: Monica Mamian
authors.initials: MM
authors.lastname: Lopez
authors.forename: Leandro Wang
authors.initials: LW
authors.lastname: Hantao
authors.forename: Ronei Jesus
authors.initials: RJ
authors.lastname: Poppi
authors.forename: Fabio
authors.initials: F
authors.lastname: Augusto
mesh_terms: D056804:Biofuels / Q000032:analysis*; D002138:Calibration; D002849:Chromatography, Gas / Q000379:methods*; D005410:Flame Ionization; D005742:Gasoline / Q000032:analysis*; D015999:Multivariate Analysis; D025341:Principal Component Analysis
chemical_list: D056804:Biofuels; D005742:Gasoline
keywords: Biodiesel; Blends of biodiesel and conventional diesel; Comprehensive two-dimensional gas chromatography; Multivariate curve resolution; Multiway principal component analysis