Use of ultrahigh resolution and accurate mass spectrometry techniques in marine organic: characterization of dissolved organic matter in the estuary-lagoon system of Cananéia-Iguape and comparison with other environments in São Paulo state.

• Grant number: 13/15644-0
• Support Opportunities: Scholarships in Brazil - Doctorate
• Start date: October 01, 2013
• End date: February 28, 2017
• Field of knowledge: Physical Sciences and Mathematics - Oceanography - Chemical Oceanography
• Principal Investigator: Marcos Nogueira Eberlin
• Grantee: Jose Javier Melendez Perez
• Host Institution: Instituto de Química (IQ). Universidade Estadual de Campinas (UNICAMP). Campinas , SP, Brazil

Abstract

In the present work, ultrahigh resolution and accurate mass spectrometry techniques such as FTICR MS and HRT MS will be employed to characterize dissolved organic matter in the estuary-lagoon system of Cananéia-Iguape to identify unexplored class of compounds in organic geochemistry. The project is particularly important because this estuarine-lagoon system is one of the most important nurseries for marine life on the planet, and changes in the cycle of dissolved organic matter, as well as the input of pollutants, can definitely compromise the sustainability of the ecosystem. The great resolving power of FTICR MS and MS HRT combined with different ionization techniques (ESI, APPI, APCI) can provide extensive information of the elemental and molecular constituents of dissolved organic matter (DOM). This information can be used to identify homologous series and biomarkers that are potentially useful to better understand geochemical processes, the origin of DOM, and changes related to geographical or anthropogenic aspects such as the presence and location of Valo Grande channel. Kendrick charts, van Kreveler diagrams and Island graphs will be employed as tools of clustering the massive amount of data generated in the mass spectra of DOM samples. Another focus of this research is to evaluate the performance and efficiency of the conventional SPE extraction method and a variant of SPE assisted with electric potential for the isolation and desalting of samples.

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

MELENDEZ-PEREZ, JOSE J.; MARTINEZ-MEJIA, MONICA J.; AWAN, ALMAS TAJ; FADINI, PEDRO S.; MOZETO, ANTONIO A.; EBERLIN, MARCOS NOGUEIRA. Characterization and comparison of riverine, lacustrine, marine and estuarine dissolved organic matter by ultra-high resolution and accuracy Fourier transform mass spectrometry. Organic Geochemistry, v. 101, p. 99-107, NOV 2016. (13/15644-0)

MELENDEZ-PEREZ, JOSE J.; MARTINEZ-MEJIA, MONICA J.; EBERLIN, MARCOS NOGUEIRA. A reformulated aromaticity index equation under consideration for non-aromatic and non-condensed aromatic cyclic carbonyl compounds. Organic Geochemistry, v. 95, p. 29-33, MAY 2016. (13/15644-0)

MELENDEZ-PEREZ, JOSE J.; MARTINEZ-MEJIA, MONICA J.; BARCELLOS, ROBERTO L.; FETTER-FILHO, ANTONIO F. H.; EBERLIN, MARCOS NOGUEIRA. A potential formation route for CHOS compounds in dissolved organic matter. MARINE CHEMISTRY, v. 202, p. 67-72, MAY 20 2018. (13/15644-0)

Academic Publications

(References retrieved automatically from State of São Paulo Research Institutions)

PEREZ, Jose Javier Melendez. Characterization and comparison of dissolved organic matter composition of aquatic systems from São Paulo State by high resolution wings and accurate mass spectrometry. 2017. Doctoral Thesis - Universidade Estadual de Campinas (UNICAMP). Instituto de Química Campinas, SP.