coelho@iach.cz

(+420) 296 442 487

EDUCATION

• 2022-2025 Post-Doc: Department of Trace Element Analysis, Czech Academy of Sciences, Prague, Czech Republic. Supervisor: RNDr. Jan Kratzer, Ph.D. and Prof. RNDr. Jiří Dědina, CSc. DSc.
• 2023-2024 Post-Doc: Chemistry Department, Federal University of Santa Maria (UFSM), Santa Maria/RS, Brazil. Supervisor: Prof. Dr. Érico M. M. Flores.


• 2018-2022 Ph.D. in Analytical Chemistry: Chemistry Department, Federal University of Santa Catarina (UFSC), Florianópolis/SC, Brazil. Ph.D. thesis: Development of dielectric barrier discharge devices as concomitant sources of mercury volatilization and atomization for spectrometric analysis. Supervisor: Prof. Dr. Daniel L. G. Borges.
• 2016-2018 MSc. in Analytical Chemistry: Center for Chemical, Pharmaceutical, and Food Sciences, Federal University of Pelotas (UFPel), Pelotas/RS, Brazil. Master thesis: Development of methods for halogens and sulfur determination in edible mushrooms. Supervisor: Prof. Dr. Márcia F. Mesko.
• 2012-2016 BSc. in Chemistry: Center for Chemical, Pharmaceutical, and Food Sciencess, Federal University of Pelotas (UFPel), Pelotas/RS, Brazil. Bachelor thesis: Determination of halogens and sulfur in eggshells using ion chromatography after analytes volatilization by microwave-induced combustion. Supervisor: Prof. Dr. Márcia F. Mesko.

RESEARCH INTEREST

• Dielectric barrier discharge (DBD) – Optimization and application as a concomitant source of volatilization and atomization.
• Analytical instrumentation – Development of DBD devices for trace analysis.
• Mercury and arsenic species determination.
• Atomic absorption spectrometry.

HONORS AND AWARDS

• 2025: Best Oral Presentation, sponsored by Analytik Jena, 17th Rio Symposium on Atomic Spectrometry, São Pedro/SP, Brazil.
• 2025: Best Poster Presentation, sponsored by Nova Analítica, 8th Brazilian Meeting on Chemical Speciation, São Pedro/SP, Brazil.
• 2019: Best Oral Presentation, sponsored by Royal Society of Chemistry – RSC, 15th Rio Symposium on Atomic Spectrometry, Mendoza, Argentina.
• 2016: Work selected as a highlight in the area of Exact and Earth Sciences, XVIII Encontro de Pós-Graduação, Universidade Federal de Pelotas (UFPel), Pelotas, Brazil.

LIST OF PUBLICATIONS

• PLECHÁČ M., COELHO JUNIOR da S. G., SVOBODA M., MUSIL S., MATOUŠEK T., KRATZER J.: Post-column hydride generation with in-situ preconcentration in a dielectric barrier discharge atomizer for sensitive arsenic speciation analysis by atomic absorption spectrometry. Analytica Chimica Acta. (2025). [Journal website]
• COELHO JUNIOR da S. G., DĚDINA J., KRATZER J.: Reagentless All-in-one Reactor for Vapor Generation and Atomization in Arsenic Determination by Atomic Absorption Spectrometry. Analytica Chimica Acta 1372 (2025) 344444. [Journal website]
• COELHO JUNIOR da S. G., SOUZA V.P., KRATZER J., DĚDINA J., FLORES E. M.M.: Plasma-mediated mercury vapor generation after microwave-induced combustion of fish tissue with detection by atomic absorption spectrometry. Spectrochimica Acta Part B 221 (2024) 107055. [Journal website]
• COELHO JUNIOR G.S., BORGES D.L.G., SVOBODA M., DĚDINA J., KRATZER J.: Plasma-mediated vapor generation of mercury species in a dielectric barrier discharge: Direct analysis in a single drop by atomic absorption spectrometry. Spectrochimica Acta Part B - Atomic Spectroscopy 200 (2022). [Journal website]
• MARIM R.G., COELHO JUNIOR G.S., AZEVEDO P.C.C., BORGES D.L.G., MARANHAO T.A., OLIVIERA F.J.S., BASCUNAN V.L.A.F., CHAVES E.S.: Assessment of Chlorine, Fluorine, and Sulfur Concentrations in Depth Profile of Drill Cuttings from Onshore and Offshore Oil and Gas Exploration Wells. Journal of the Brazilian Chemical Society, 2022. [Journal website]
• COELHO JUNIOR G.S., FONTANA B.K., MARANHAO T.A., BORGES D.L.G.: Dielectric barrier discharge-assisted determination of methylmercury in particulate matter by atomic absorption spectrometry. Analytical Methods, 14 (2022) 1371-1377. [Journal website]
• ENDERS M.S.P., COELHO JUNIOR G.S., PIRES L.Z., BORGES D.L.G.: Silicon determination via a SiO rotational line using high-resolution graphite furnace molecular absorption spectrometry: A straightforward approach for the analysis of solid samples prepared as suspensions. Spectrochimica Acta Part B: Atomic Spectroscopy, 183 (2021) 106266. [Journal website]
• COELHO JUNIOR G.S., RONDAN F.S., HARTWIG C.A., SANTOS R.F., MELLO P.A., MESKO M.F.: Determination of halogens by ion chromatography in edible mushrooms after microwave-induced combustion for sample preparation. Journal of Analytical Methods in Chemistry, 2021 (2021) 1-9. [Journal website]
• NOVO D.L.R., SCAGLIONI P.T., PEREIRA R.M., RONDAN F.S., COELHO JUNIOR G.S., MESKO M.F.: Advances in sample digestion using microwave-ultraviolet radiations: phosphorus and sulfur determination in animal feed. Current Analytical Chemistry, 17 (2021) 512-520. [Journal website]
• DE MELLO J.E., NOVO D.L.R., COELHO JUNIOR G.S., SCAGLIONI P.T., MESKO M.F.: A green analytical method for the multielemental determination of halogens and sulfur in pet food. Food Analytical Methods, 13 (2020) 131-139. [Journal website]
• MESKO M.F., TORALLES I.G., COELHO JUNIOR G.S., RONDAN F.S., COSTA V.C., HARTWIG C.A., SCAGLIONI P.T.: Ion chromatography coupled to mass spectrometry as a powerful technique for halogens and sulfur determination in egg powder and its fractions. Rapid Communications in Mass Spectrometry, 34 (2020) 1-8. [Journal website]
• RONDAN F.S., COELHO JUNIOR G.S., PEREIRA R.M., HENN A.S., MULLER E.I., MESKO M.F.: A versatile green analytical method for determining chlorine and sulfur in cereals and legumes. Food Chemistry, 285 (2019) 334-339. [Journal website]
• TORALLES I.G., COELHO JUNIOR G.S., COSTA V.C., CRUZ S.M., FLORES E.M.M., MESKO M.F.: A fast and feasible method for Br and I determination in whole egg powder and its fractions by ICP-MS. Food Chemistry, 221 (2017) 877-883. [Journal website]
• COELHO JUNIOR G.S., PEREIRA R.M., HARTWIG C.A., TORALLES I.G., PEREIRA C.M.P., COSTA V.C., MESKO M.F.: Determination of Cl and S in edible seaweed by ion chromatography after decomposition by microwave-induced combustion. Revista Virtual De Química, 9 (2017) 492-501. [Journal website]
• MESKO M.F., TORALLES I.G., HARTWIG C.A., COELHO JUNIOR G.S., MULLER A.L.H., BIZZI C.A., MELLO P.A.: Bromine and iodine contents in raw and cooked shrimp and its parts. Journal of Agricultural and Food Chemistry, 64 (2016) 1817-1822. [Journal website]