Directly mapping the spatial distribution of organic compounds on mineral rock surfaces by DESI and LAESI mass spectrometry imaging

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dc.creatorSilva, Igor Pereira da
dc.creatorRamalho, Ruver Rodrigues Feitosa
dc.creatorMaciel, Lanaia Ítala Louzeiro
dc.creatorAguiar, Deborah Victoria Alves de
dc.creatorGomes, Yan Trindade Lisbôa
dc.creatorCruz, Georgiana Feitosa da
dc.creatorVianna, Angelo Marinho
dc.creatorMedeiros Júnior, Iris
dc.creatorLima, Gesiane da Silva
dc.creatorVaz, Boniek Gontijo
dc.date.accessioned2023-07-28T15:30:19Z
dc.date.available2023-07-28T15:30:19Z
dc.date.issued2022
dc.description.abstractHere, we present a new application of desorption electrospray ionization (DESI) and laser ablation electrospray ionization (LAESI) mass spectrometry imaging to assess the spatial location of organic compounds, both polar and nonpolar, directly from rock surfaces. Three carbonaceous rocks collected from an aquatic environment and a berea sandstone subjected to a small-scale oil recovery experiment were analyzed by DESI and LAESI. No rock pretreatment was required before DESI and LAESI analyses. DESI detected and spatially mapped several fatty acids and a disaccharide on the surfaces of carbonaceous rocks, and various nitrogenated and oxygenated compounds on the surfaces of berea sandstone. In contrast, LAESI using a 3.4 μm infrared laser beam was able to detect and map hydrocarbons on the surfaces of all rock samples. Both techniques can be combined to analyze polar and nonpolar compounds. DESI can be used first to detect polar compounds, as it does not destroy the rock surface, and LAESI can then be used to analyze nonpolar analytes, as it destroys a layer of the sample surface. Both techniques have the potential to be used in several scientific areas involving rocks and minerals, such as in the analysis of industry-derived contaminants in aquatic sediments or in small-scale rock–fluid interaction experiments.pt_BR
dc.identifier.citationPEREIRA, Igor et al. Directly mapping the spatial distribution of organic compounds on mineral rock surfaces by DESI and LAESI mass spectrometry imaging. Analytical Chemistry, Washington, v. 94, n. 40, p. 13691-13699, 2022. DOI: 10.1021/acs.analchem.2c01154. Disponível em: https://pubs.acs.org/doi/10.1021/acs.analchem.2c01154. Acesso em: 28 jun. 2023.pt_BR
dc.identifier.doi10.1021/acs.analchem.2c01154
dc.identifier.issn0003-2700
dc.identifier.issne- 1520-6882
dc.identifier.urihttps://pubs.acs.org/doi/10.1021/acs.analchem.2c01154
dc.language.isoengpt_BR
dc.publisher.countryEstados unidospt_BR
dc.publisher.departmentInstituto de Química - IQ (RMG)pt_BR
dc.rightsAcesso Restritopt_BR
dc.titleDirectly mapping the spatial distribution of organic compounds on mineral rock surfaces by DESI and LAESI mass spectrometry imagingpt_BR
dc.typeArtigopt_BR

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