Search Results - "Araujo, Rennan"

Determination of phosphorus, sulfur and the halogens using high-temperature molecular absorption spectrometry in flames and furnaces—A review by Welz, Bernhard, Lepri, Fábio G., Araujo, Rennan G.O., Ferreira, Sérgio L.C., Huang, Mao-Dong, Okruss, Michael, Becker-Ross, Helmut

“…The literature about the investigation of molecular spectra of phosphorus, sulfur and the halogens in flames and furnaces, and the use of these spectra for the…”
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Multivariate optimization of a procedure employing microwave-assisted digestion for the determination of nickel and vanadium in crude oil by ICP OES by dos Anjos, Shirlei L., Alves, Jeferson C., Rocha Soares, Sarah A., Araujo, Rennan G.O., de Oliveira, Olivia M.C., Queiroz, Antonio F.S., Ferreira, Sergio L.C.

“…This work presents the optimization of a sample preparation procedure using microwave-assisted digestion for the determination of nickel and vanadium in crude…”
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Multivariate data analysis of trace elements in bivalve molluscs: Characterization and food safety evaluation by Barbosa, Isa dos S., Brito, Geysa B., dos Santos, Gabriel L., Santos, Luana N., Teixeira, Leonardo S.G., Araujo, Rennan G.O., Korn, Maria Graças A.

“…•Bivalve molluscs species were analyzed by ICP OES and ICP-MS.•Most Lucina pectinata samples had higher concentrations of Cu, Cr and Pb.•Concentrations of As…”
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Green sample preparation of medicinal herbs in closed digester block for elemental determination by ICP OES by Pereira Junior, João B., Carvalho, Vanessa S., Ferreira, William Q., Araujo, Rennan G.O., Ferreira, Sérgio L.C.

“…This work presents a simple, cost-effective, and environmentally friendly digestion method employing inductively coupled plasma optical emission spectrometry…”
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Assessment of the Halogen Content of Brazilian Inhalable Particulate Matter (PM10) Using High Resolution Molecular Absorption Spectrometry and Electrothermal Vaporization Inductively Coupled Plasma Mass Spectrometry, with Direct Solid Sample Analysis by de Gois, Jefferson S, Almeida, Tarcisio S, Alves, Jeferson C, Araujo, Rennan G. O, Borges, Daniel L. G

“…Halogens in the atmosphere play an important role in climate change and also represent a potential health hazard. However, quantification of halogens is not a…”
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Geochemical base for As, Co, Cu, Ni, P, Pb, S, V and Zn in road dust collected in areas of oil industry activity in the Metropolitan Region of Salvador, Bahia, Brazil by Mesquita, Guilherme S., Passos, Elisangela A., Oliveira, Sidimar S., Queiroz, Antonio Fernando S., Soares, Sarah Adriana R., Araujo, Rennan G.O.

“…[Display omitted] •Inorganic constituents in road dust were evaluation in Brazilian cities.•Seventeen road dust samples were collected in the Metropolitan…”
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Selenium inorganic speciation in beers using MSFIA-HG-AFS system after multivariate optimization by Souza, Sidnei O., Ávila, Dayara Virgínia L., Cerdà, Victor, Araujo, Rennan Geovanny O.

“…•Experimental conditions of hydride generation were optimized through Doehlert design.•Beer samples effectively analyzed by MSFIA-HG-AFS system.•Precise,…”
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Determination of total and bioavailable As and Sb in children's paints using the MSFIA system coupled to HG-AFS by Ávila, Dayara Virgà Nia L, Souza, Sidnei Oliveira, Cerdà, Victor, Araujo, Rennan G O

“…In this study, the use of hydride generation atomic fluorescence spectrometry (HG-AFS) coupled with the multi-syringe flow injection analysis (MSFIA) has been…”
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Automated flow systems for total and isotopic analysis of uranium and thorium in samples of environmental interest – A review by Avivar, Jessica, Felix, Caio S.A., Lemos, Valfredo A., Araujo, Rennan G.O., Ferreira, Sergio L.C., Cerdà, Víctor

“…As a result of the different uses of radioactivity during the last decades, there has been an increase in the concentration of natural and artificial…”
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Evaluation of the Profiles of Essential and Potentially Toxic Elements Present in Grape Must Grown and Soil from the Region Submedium São Francisco, Brazil by Santos, Vanessa, Araujo, Rennan, Almeida, Tarcísio, dos Santos, Wagna, Korn, Maria das Graças

“…This work evaluated the multi-element concentration in grape must and soil samples employing inductively coupled plasma optical emission spectrometry (ICP…”
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Assessment of cadmium and lead in commercial coconut water and industrialized coconut milk employing HR-CS GF AAS by Paixão, Luciane B., Brandão, Geovani C., Araujo, Rennan Geovanny O., Korn, Maria Graças A.

“…•Concentrations of Cd and Pb were determined in coconut water and coconut milk samples by HR-CS GF AAS.•Sample preparation procedures using dilute acid and an…”
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Determination of nutrients in sugarcane juice using slurry sampling and detection by ICP OES by Souza, Sidnei Oliveira, Costa, Silvânio Silvério L., Brum, Bia Catarina T., Santos, Samir Hipólito, Garcia, Carlos Alexandre B., Araujo, Rennan Geovanny O.

“…•Direct analysis of slurry by ICP OES was optimized through experimental designs.•Sugarcane juice analyses using slurry sampling and detection by ICP…”
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Emissions of PAHs, Nitro-PAHs and Quinones (Oxy-PAHs) Associated to PM1.0 and PM2.5 Emitted by a Diesel Engine Fueled with Diesel-Biodiesel-Ethanol Blends by Paim, Joilson Nascimento, Santos, Aldenor Gomes, Araujo, Rennan G. O., Nascimento, Madson Moreira, De Andrade, Jailson Bittencourt, Guarieiro, Lilian Lefol Nani

“…Emissions of PAH, nitro-PAHs, and oxy-PAHs from a diesel engine fueled with diesel-biodiesel-ethanol blends need to be controlled and reduced, as they are…”
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Correction of structured molecular background by means of high-resolution continuum source electrothermal atomic absorption spectrometry—Determination of antimony in sediment reference materials using direct solid sampling by Araujo, Rennan G.O., Welz, Bernhard, Vignola, Fabiola, Becker-Ross, Helmut

“…A simple, fast and accurate procedure is proposed for the determination of antimony in certified sediment reference materials using direct solid sampling…”
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Development of Analytical Method for Determination of Inorganic Constituents in Powder Refreshment using Dilute Mineral Acids and Detection by ICP OES by Santos, Samir, Costa, Silvânio, Souza, Sidnei, Garcia, Karina, Soares, Sarah, Garcia, Carlos, Almeida, Tarcísio, Araujo, Rennan

“…An analytical method for multi-elementary determination in powder refreshment, based on sample digestion using dilute mineral acids and detection by…”
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Chitosan-functionalized nanostructured lipid carriers containing chloroaluminum phthalocyanine for photodynamic therapy of skin cancer by Almeida, Ellen Denise Prado, Santos Silva, Luiz André, de Araujo, Guilherme Rodolfo Souza, Montalvão, Monalisa Martins, Matos, Saulo Santos, da Cunha Gonsalves, Joyce Kelly Marinheiro, de Souza Nunes, Rogéria, de Meneses, Cristiano Teles, Oliveira Araujo, Rennan Geovanny, Sarmento, Víctor Hugo Vitorino, De Lucca, Waldecy, Correa, Cristiane Bani, Rodrigues, José Joatan, Lira, Ana Amélia Moreira

“…[Display omitted] •NLC functionalized with chitosan had not yet been investigated in PTD.•Chitosan coating resulted in greater encapsulation efficiency and…”
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Geochemistry of trace metals in surface sediments from the continental slope of the states of Sergipe and Alagoas, Northeastern Brazil by Garcia, Carlos Alexandre Borges, Monteiro, Adnívia Santos Costa, da Costa, Silvânio Silvério Lopes, de Macedo Arguelho, Maria de Lara Palmeira, Araújo, Rennan Geovanny Oliveira, Carneiro, Maria Eulália Rocha, do Patrocínio Hora Alves, José

“…Geochemical analyses were used to determine the origin and identify the main factors that lead to the metal trace distribution on the surface sediments from…”
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Quantification of ytterbium in road dust applying slurry sampling and detection by high-resolution continuum source graphite furnace atomic absorption spectrometry by Oliveira, Sidimar S., Ribeiro, Vaniele S., Almeida, Tarcísio S., Araujo, Rennan Geovanny O.

“…In this work, the determination of ytterbium in road dust samples, employing a simple and fast methodology, based on sample preparation as slurry and analysis…”
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Determination of essential and potentially toxic elements and their estimation of bioaccessibility in honeys by Oliveira, Sidimar Santos, Alves, Camilla Nascimento, Boa Morte, Elane Santos, de Freitas Santos Júnior, Anibal, Araujo, Rennan Geovanny Oliveira, Santos, Daniele Cristina Muniz Batista

“…In this work, the evaluation of the mineral profile and estimation of the bioaccessibility of essential and potentially toxic elements in honey samples was…”
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Simultaneous Determination of Cd and Fe in Beans and Soil of Different Regions of Brazil Using High-Resolution Continuum Source Graphite Furnace Atomic Absorption Spectrometry and Direct Solid Sampling by dos Santos, Lisia M. G, Welz, Bernhard, Araujo, Rennan G. O, Jacob, Silvana do C, Vale, Maria Goreti R, Martens, Andreas, Gonzaga Martens, Irland B, Becker-Ross, Helmut

“…A fast routine screening method for the simultaneous determination of cadmium and iron in bean and soil samples is proposed, using high-resolution continuum…”
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