MARYCEL ELENA BARBOZA COTRIM

MARYCEL ELENA BARBOZA COTRIM

(Fonte: Lattes)

ORCID

ScopusID

ResearcherID

Resumo

Bachelor's at Química from Faculdades Osvaldo Cruz (1985), master's at Tecnologia Nuclear from Instituto de Pesquisas Energeticas E Nucleares (1991) and doctorate at Tecnologia Nuclear from Instituto de Pesquisas Energeticas E Nucleares (2006). Has experience in Chemistry, focusing on Separation, acting on the following subjects: avaliação ambiental, metais, química ambiental, qualidade da água and química analítica. (Text obtained from the Currículo Lattes on November 17th 2021)

Mestrado em Tecnologia Nuclear pelo Instituto de Pesquisas Energéticas E Nucleares (1991) e Doutorado em Tecnologia Nuclear pelo Instituto de Pesquisas Energéticas E Nucleares (2006). Atualmente é pesquisador da Comissão Nacional de Energia Nuclear. Experiência em química analítica, atuando principalmente nos seguintes temas: avaliação ambiental, metais, química ambiental, qualidade da água e química analítica, caracterização de compostos de urânio e química analítica instrumental. (Texto extraído do Currículo Lattes em 17 nov. 2021)

Página do item completo

Resultados de Busca

Agora exibindo 1 - 10 de 22

Direct determination of aluminum in low-enriched UAlx targets (UAlx-Al) by ICP OES
2021 - GUILHEN, S.N.; SOUZA, A.L.; COTRIM, M.E.B.; PIRES, M.A.F.
The production of molybdenum-99 (99Mo) using low-enriched uranium targets (< 20% 235U) dispersed in aluminum (UAlx) is a very promising strategy towards the independence in 99Mo local production. A thorough control must be performed to ensure that these targets meet the regulatory requirements to achieve the expected efficiency in the reactor. The determination of the targets’ composition is of high interest, because the distribution of Al in different phases may have an impact on the U concentration. Among the techniques used for this purpose, inductively coupled plasma optical emission spectrometry (ICP OES) stands out because of its high sensitivity and precision, allowing for simultaneous determination of several elements in a variety of samples and matrices. However, because U exhibits a complex emission spectrum, spectral interferences are prone to affect the analysis of Al, calling for time consuming preparation steps to remove the U from the matrix. This study proposes a method of direct determination of Al in UAlx targets through the selection of specific emission lines enabled by the evaluation of the associated interferences on the recovery values.
Direct determination of aluminum in low-enriched UALx targets ( UAlx-Al) by inductively coupled plasma optical emission spectrometry
2019 - GUILHEN, SABINE N.; SOUZA, ALEXANDRE L.; COTRIM, MARYCEL E.B.; PIRES, MARIA A.F.
The production of molybdenum-99 (99Mo) using low-enriched uranium targets (< 20% 235U) dispersed in aluminum (UAlx) is a very promising strategy towards the independence in 99Mo local production. A thorough control must be performed to ensure that these targets meet the regulatory requirements to achieve the expected efficiency in the reactor. The determination of the targets’ composition is of high interest, because the distribution of Al in different phases may have an impact on the U concentration. Among the techniques used for this purpose, inductively coupled plasma optical emission spectrometry (ICP OES) stands out because of its high sensitivity and precision, allowing for simultaneous determination of several elements in a variety of samples and matrices. However, because U exhibits a complex emission spectrum, spectral interferences are prone to affect the analysis of Al, calling for time consuming preparation steps to remove the U from the matrix. This study proposes a method of direct determination of Al in UAlx targets through the selection of specific emission lines enabled by the evaluation of the associated interferences on the recovery values.
Method development and validation for simultaneous determination of IEA-R1 reactor’s pool water uranium and silicon content by ICP OES
2018 - ULRICH, J.C.; GUILHEN, S.N.; COTRIM, M.E.B.; PIRES, M.A.F.
IPEN’s research reactor, IEA-R1, an open pool type research reactor moderated and cooled by light water. High quality water is a key factor in preventing the corrosion of the spent fuel stored in the pool. Leaching of radionuclides from the corroded fuel cladding may be prevented by an efficient water treatment and purification system. However, as a safety management policy, IPEN has adopted a water chemistry control which periodically monitors the levels of uranium (U) and silicon (Si) in the pool’s reactor, since IEA-R1 employs U3Si2-Al dispersion fuel. An analytical method was developed and validated for the determination of uranium and silicon by ICP OES. This work describes the validation process, in a context of quality assurance, including the parameters selectivity, linearity, quantification limit, precision and recovery.
Method development and validation for simultaneous determination of IEAR1 reactor's pool water U and Si content by ICP OES
2017 - ULRICH, JOAO C.; GUILHEN, SABINE N.; COTRIM, MARYCEL E.B.; PIRES, MARIA A.F.
Uncertainty Estimation of Metals and Semimetals Determination in Wastewater by Inductively Coupled Plasma Optical Emission Spectrometry (ICP-OES)
2016 - MARQUES, J.R.; VILLA-SOARES, S.M.; STELLATO, T.B.; SILVA, T.B.S.C.; FAUSTINO, M.G.; MONTEIRO, L.R.; PIRES, M.A.F.; COTRIM, M.E.B.
The measurement uncertainty is a parameter that represents the dispersion of the results obtained by a method of analysis. The estimation of measurement uncertainty in the determination of metals and semimetals is important to compare the results with limits defined by environmental legislation and conclude if the analytes are meeting the requirements. Therefore, the aim of this paper is present all the steps followed to estimate the uncertainty of the determination of amount of metals and semimetals in wastewater by Inductively Coupled Plasma Optical Emission Spectrometry (ICP-OES). Measurement uncertainty obtained was between 4.6 and 12.2% in the concentration range of mg.L-1.
Uncertainty estimation in the determination of metals in superficial water by ICP-OES
2016 - FAUSTINO, MAINARA G.; MARQUES, JOYCE R.; MONTEIRO, LUCILENA R.; STELLATO, THAMIRIS B.; SOARES, SABRINA M.V.; SILVA, TATIANE B.S.C.; SILVA, DOUGLAS B. da; PIRES, MARIA A.F.; COTRIM, MARYCEL E.B.
From validation studies, it was possible to estimate a measurement uncertainty of several elements such as Al, Ba, Ca, Cu, Cr, Cd, Fe, Mg, Mn, Ni and K in water samples from Guarapiranga Dam. These elements were analyzed by optical emission spectrometry with inductively coupled plasma (ICP-OES). The value of relative estimated uncertainties were between 3% and 15%. The greatest uncertainty contributions were analytical curve, and the recovery method, which were related with elements concentrations and the equipment response. Water samples analyzed were compared with CONAMA Resolution #357/2005.
Uncertainty estimation in the determination of metals in superficial water by ICP-OES
2015 - FAUSTINO, MAINARA G.; MARQUES, JOYCE R.; MONTEIRO, LUCILENA R.; STELLATO, THAMIRIS B.; SOARES, SABRINA M.V.; SILVA, TATIANE B.S.C.; SILVA, DOUGLAS B. da; PIRES, MARIA A.F.; COTRIM, MARYCEL E.B.
Uncertainty estimation of metals and semimetals determination in wastewater by Inductively Coupled Plasma Optical Emission Spectrometry (ICP-OES)
2015 - MARQUES, JOYCE R.; SOARES, SABRINA M.V.; STELLATO, THAMIRIS B.; SILVA, TATIANE B.S.C.; FAUSTINO, MAINARA G.; MONTEIRO, LUCILENA R.; PIRES, LUCILENA A.F.; COTRIM, MARYCEL E.B.
Estimation of metal pollutant loads from nuclear and Energy Research Institute (Brazil)
2015 - MARQUES, JOYCE R.; MONTEIRO, LUCILENA R.; SOARES, SABRINA M.V.; STELLATO, THAMIRIS B.; SILVA, TATIANE B.S.C.; SILVA, DOUGLAS B. da; FAUSTINO, MAINARA G.; PIRES, MARIA A.F.; COTRIM, MARYCEL E.B.
Estudo da influencia da Rodovia Fernao Dias sobre a qualidade do solo do Parque da Cantareira
2001 - VALLILO, M.I.; FLUES, M.S.M.; SATO, I.M.; COTRIM, M.E.B.; PFEIFER, R.M.; SALVADOR, V.L.R.; OLIVEIRA, E.