title: Characterization of crude oil biomarkers using comprehensive two-dimensional gas chromatography coupled to tandem mass spectrometry.
abstract: Oil samples from Recôncavo basin (NE Brazil), previously analyzed by traditional techniques such as gas chromatography coupled to tandem mass spectrometry, were evaluated using comprehensive two-dimensional gas chromatography coupled to quadrupole mass spectrometry and comprehensive two-dimensional gas chromatography coupled to tandem mass spectrometry along with simplified methods of samples preparation to evaluate the differences and advantages of these analytical techniques to better understand the development of the organic matter in this basin without altering the normal distribution of the compounds in the samples. As a result, the geochemical parameters calculated by comprehensive two-dimensional gas chromatography coupled to tandem mass spectrometry described better the origin, maturity, and biodegradation of both samples probably by increased selectivity, resolution, and sensitivity inherent of the multidimensional technique. Additionally, the detection of the compounds such as, the C(14α-) homo-26-nor-17α-hopane series, diamoretanes, nor-spergulanes, C19 -C26 A-nor-steranes and 4α-methylsteranes resolved and detected by comprehensive two-dimensional gas chromatography coupled to tandem mass spectrometry were key to classify and differentiate these lacustrine samples according to their maturity and deposition conditions.
authors.affiliation: Institute of Chemistry, University of Campinas (IQ/UNICAMP), São Paulo, Brazil. gaby867@gmail.com.|Department of Investigation, University of Bolivar (UEB), Ecuador. gaby867@gmail.com.
authors.forename: Noroska Gabriela Salazar
authors.initials: NG
authors.lastname: Mogollón
authors.affiliation: Institute of Chemistry, University of Campinas (IQ/UNICAMP), São Paulo, Brazil.
authors.forename: Paloma Santana
authors.initials: PS
authors.lastname: Prata
authors.affiliation: Institute of Chemistry, University of Campinas (IQ/UNICAMP), São Paulo, Brazil.
authors.forename: Jadson Zeni
authors.initials: JZ
authors.lastname: Dos Reis
authors.affiliation: Petróleo Brasileiro, (PETROBRAS), Rio de Janeiro, Brazil.
authors.forename: Eugênio Vaz Dos Santos
authors.initials: EV
authors.lastname: Neto
authors.affiliation: Institute of Chemistry, University of Campinas (IQ/UNICAMP), São Paulo, Brazil.
authors.forename: Fabio
authors.initials: F
authors.lastname: Augusto
keywords: Biomarkers; Comprehensive two-dimensional gas chromatography; Petroleum; Tandem mass spectrometry