Search Results - "Raimundo, Ivo M."

Revising the synthesis of Stöber silica nanoparticles: A multivariate assessment study on the effects of reaction parameters on the particle size by Fernandes, Rafael S., Raimundo, Ivo M., Pimentel, M. Fernanda

“…[Display omitted] The effects of parameters such as concentration of water, ammonia, ethanol and tetraethoxysilane (TEOS) on the size of silica nanoparticles…”
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A fluorescent magnetic core–shell nanosensor for detection of copper ions in natural waters by Namikuchi, Eliane A., Gaspar, Rafael D.L., Raimundo, Ivo M., Mazali, Italo O.

“…[Display omitted] •A luminescent nanosensor based on a magnetite core and a SiO2 shell with a modified Rhodamine B molecule covalently bonded to the silica…”
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A surface-enhanced infrared absorption spectroscopy (SEIRA) multivariate approach for atrazine detection by Trindade, Felipe C.S., de Souza Sobrinha, Izabel G., Pereira, Goreti, Pereira, Giovannia A.L., Raimundo, Ivo M., Pereira, Claudete F.

“…[Display omitted] •A green, fast, and effective multivariate method for determine atrazine with ATR-IR;•Ag2Se stabilized with mercaptopropionic acid quantum…”
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Detection of Low Lithium Concentrations Using Laser-Induced Breakdown Spectroscopy (LIBS) in High-Pressure and High-Flow Conditions by Raimundo, Ivo M., Michael Angel, S., Colón, Arelis M.

“…This paper describes the effects of laser pulse rate and solution flow rate on the determination of lithium at high pressure for water and 2.5% sodium chloride…”
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Optimizing Cu(II) luminescent nanosensors by molecular engineering of the indicator dye and the encapsulation process by Santos, Klecia M., Santos, Andre Ribeiro, Raimundo, Ivo M., Moreno-Bondi, Maria C., Orellana, Guillermo

“…•Luminescent RuII dyes engineered for highest sensitivity and selectivity to CuII.•The best complex was embedded into 20nm silica nanoparticles for optical…”
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Luminescent oxygen probes based on TbIII complexes chemically bonded to polydimethylsiloxane by Gaspar, Rafael D.L., Ferraz, Sofia M.M., Padovani, Pamela C., Fortes, Paula R., Mazali, Italo O., Sigoli, Fernando A., Raimundo, Ivo M.

“…In this work, the functionalization degree of siloxane crosslinkers by allyldiphenylphosphine oxide (adppo) and its effect on the performance of a…”
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Simultaneous determination of methanol and ethanol in gasoline using NIR spectroscopy: Effect of gasoline composition by Fernandes, Heitor L., Jr, Ivo M. Raimundo, Pasquini, Celio, Rohwedder, Jarbas J.R.

“…Near infrared (NIR) spectroscopy was employed for simultaneous determination of methanol and ethanol contents in gasoline. Spectra were collected in the range…”
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A Simple Device for Lens-to-Sample Distance Adjustment in Laser-Induced Breakdown Spectroscopy (LIBS) by Cortez, Juliana, Farias Filho, Benedito B., Fontes, Laiane M., Pasquini, Celio, Raimundo, Ivo M., Pimentel, Maria Fernanda, de Souza Lins Borba, Flávia

“…A simple device based on two commercial laser pointers is described to assist in the analysis of samples that present uneven surfaces and/or irregular shapes…”
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Simultaneous determination of BTX and total hydrocarbons in water employing near infrared spectroscopy and multivariate calibration by Lima, Kássio M.G., Raimundo, Ivo M., Pimentel, Maria Fernanda

“…A method for the simultaneous determination of benzene, toluene and xylenes (BTX) in water based on the use of a silicone sensing phase, detection by near…”
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Photostable, Oxygen-Sensitive Optical Probe Based on a Homonuclear Terbium(III) Complex Covalently Bound to Functionalized Polydimethylsiloxane by Gaspar, Rafael D. L., Monteiro, Jorge H. S. K., Raimundo Jr, Ivo M., Mazali, Italo O., Sigoli, Fernando A.

“…A new oxygen‐sensitive optical probe based on the [Tb(3,5‐dcba)3]⋅1/2 H2O (3,5‐dcba=3,5‐dichlorobenzoate) complex, which is chemically attached to a…”
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microfluidic device with integrated fluorimetric detection for flow injection analysis by Fonseca, Alexandre, Raimundo, Ivo M. Jr, Rohwedder, Jarbas J. R, Lima, Renato S, Araújo, Mário C. Ugulino

“…This work describes the development of flow analysis microsystems with integrated fluorimetric detection cells. Channels (width of 300-540 µm and depth of…”
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A simple method for water discrimination based on an light emitting diode (LED) photometer by Fonseca, Alexandre, Raimundo, Ivo M.

“…This work describes the use of a multi-LED photometer for discrimination of mineral water samples, employing chromogenic reagents and chemometric techniques…”
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Simultaneous determination of copper, mercury and zinc in water with a tailored fluorescent bipyridine ligand entrapped in silica sol-gel by Lopes Pinheiro, Silvia C, Raimundo, Ivo M. Jr, Moreno-Bondi, María C, Orellana, Guillermo

“…A novel fluorescent ligand, (4-[(E)-2-(4′-methyl-2,2′-bipyridin-4-yl)vinyl]phenol) (abbreviated BSOH), has been designed and prepared for simultaneous…”
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Assessment of infrared spectroscopy and multivariate techniques for monitoring the service condition of diesel-engine lubricating oils by Caneca, Arnobio Roberto, Pimentel, M. Fernanda, Galvão, Roberto Kawakami Harrop, da Matta, Cláudia Eliane, de Carvalho, Florival Rodrigues, Raimundo, Ivo M., Pasquini, Celio, Rohwedder, Jarbas J.R.

“…This paper presents two methodologies for monitoring the service condition of diesel-engine lubricating oils on the basis of infrared spectra. In the first…”
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Fluorescent ion-imprinted polymers for selective Cu(II) optosensing by Lopes Pinheiro, Silvia C., Descalzo, Ana B., Raimundo, Ivo M., Orellana, Guillermo, Moreno-Bondi, María C.

“…This paper describes the synthesis and characterization of a fluorescent ion-imprinted polymer (IIP) for selective determination of copper ions in aqueous…”
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A multichannel photometer based on an array of light emitting diodes for use in multivariate calibration by Fonseca, Alexandre, Raimundo, Ivo M.

“…The development of a multichannel photometer based on an array of eight light emitting diodes (LED) as light sources is described. Optical fibre bundles were…”
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Construction and evaluation of a flow injection micro-analyser based on urethane–acrylate resin by Fonseca, Alexandre, Raimundo, Ivo M., Rohwedder, Jarbas J.R., Ferreira, Luiz Otávio S.

“…A flow injection micro-analyser with an integrated injection device and photometric detection is described. Channels measuring 205–295 μm depth by 265–290 μm…”
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Optical Sensor for Sulfur Dioxide Determination in Wines by Silva, Karime R. B, Raimundo, Ivo M, Gimenez, Iara F, Alves, Oswaldo L

“…A method for the determination of free and total sulfur dioxide in wines, based on the use of an optical sensor that employs a…”
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Synthesis and characterization of porous surface molecularly imprinted silica microsphere for selective extraction of ascorbic acid by Fernandes, Rafael S., Dinc, Mehmet, Raimundo, Ivo M., Mizaikoff, Boris

“…Molecularly imprinted polymers (MIPs) with core-shell structure for efficient, reliable, and selective extraction of ascorbic acid (AA) were developed via…”
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Silicone Sensing Phase for Detection of Aromatic Hydrocarbons in Water Employing Near-Infrared Spectroscopy by Albuquerque, Jackson S, Pimentel, M. Fernanda, Silva, Valdinete L, Raimundo, Ivo M, Rohwedder, Jarbas J. R, Pasquini, Celio

“…The use of silicone for detection of aromatic hydrocarbons in water using near-infrared spectroscopy is proposed. A sensing phase of poly(dimethylsiloxane)…”
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