Search Results - "de Paula, Carlos Eduardo R."

Application of the extraction induced by emulsion breaking for the determination of Cu, Fe and Mn in used lubricating oils by flame atomic absorption spectrometry by Caldas, Luiz Fernando S., Brum, Daniel M., de Paula, Carlos Eduardo R., Cassella, Ricardo J.

“…A novel approach is proposed for the sample preparation of used lubricating oils to determine Cu, Fe and Mn by FAAS. The method is based on the extraction…”
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Development of a focused ultrasound-assisted extraction method for the determination of trace concentrations of Cr and Mn in pharmaceutical formulations by ETAAS by de Paula, Carlos Eduardo R., Caldas, Luiz Fernando S., Brum, Daniel M., Cassella, Ricardo J.

“…[Display omitted] ► This work proposes the focused ultrasound assisted extraction of Cr and Mn from tablets for their determination by ETAAS. ► The total…”
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Solid Phase Extraction Using SiO2/Al2O3/TiO2 Ternary Oxide for Cu2+ Preconcentration by Pinheiro, Evelyn, Rodrigues, José Guilherme, Honório, Gláucio, da Cunha, Jéssica, de Paula, Carlos Eduardo, de Andrade, Débora, Ribeiro, Emerson, D’Elia, Eliane

“…The present work aims at studying the preconcentration of Cu2+ ions by solid phase extraction using SiO2/Al2O3/TiO2 ternary oxide as adsorbent material. This…”
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Development of an ultrasonic slurry sampling method for the determination of Cu and Mn in antibiotic tablets by electrothermal atomic absorption spectrometry by de Paula, Carlos Eduardo R., Caldas, Luiz Fernando S., Brum, Daniel M., Cassella, Ricardo J.

“…A new method is described for simple, efficient and rapid determination of Cu and Mn in tablets of antibiotics (ciprofloxacin and cephalexin) by electrothermal…”
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Application of a four-variables Doehlert design for the multivariate optimization of copper determination in petroleum-derived insulating oils by GFAAS employing the dilute-and-shot approach by Caldas, Luiz Fernando S., de Paula, Carlos Eduardo R., Brum, Daniel M., Cassella, Ricardo J.

“…[Display omitted] . ► A method is proposed for the determination of Cu in insulating oils by GFAAS. ► The method was optimized using a multivariate strategy…”
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Multivariate optimization of the determination of zinc in diesel oil employing a novel extraction strategy based on emulsion breaking by Cassella, Ricardo J., Brum, Daniel M., Lima, Claudio F., Caldas, Luiz Fernando S., de Paula, Carlos Eduardo R.

“…This paper describes the extraction/pre-concentration of Zn from diesel oil and its determination by Flame Atomic Absorption Spectrometry (FAAS), proposed as a…”
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Novel spectrophotometric method for the determination of azithromycin in pharmaceutical formulations based on its charge transfer reaction with quinalizarin by Paula, Carlos Eduardo R. de, Almeida, Vanessa G. K, Cassella, Ricardo J

“…This paper proposes a new method for simple and fast spectrophotometric determination of azithromycin in pharmaceutical formulations. The method is based on…”
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Determinação espectrofotométrica de cefalexina em formulações farmacêuticas explorando a sua reação de transferência de carga com a quinalizarina by Paula, Carlos Eduardo R. de, Almeida, Vanessa G. K., Cassella, Ricardo J.

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Determination of Cr and Mn in moisturizing creams by graphite furnace atomic absorption spectrometry through direct introduction of the samples in the form of emulsions by de Paula, Carlos Eduardo R., Cruz, Graziela F.B., Rezende, Cintia Maria S.P., Cassella, Ricardo J.

“…This paper reports the development of a novel method for the determination of Cr and Mn in moisturizing creams by graphite furnace atomic absorption…”
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Novel approach for the determination of azithromycin in pharmaceutical formulations by Fourier transform infrared spectroscopy in film-through transmission mode by Robaina, Nicolle F., de Paula, Carlos Eduardo R., Brum, Daniel M., de la Guardia, Miguel, Garrigues, Salvador, Cassella, Ricardo J.

“…This work reports the development of a new method for the determination of azithromycin in pharmaceutical formulations employing Fourier transform infrared…”
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Avaliação de diferentes métodos para a determinação de cobre em óleo mineral isolante por espectrometria de absorção atômica com forno de grafite by Luiz Fernando S. Caldas, Carlos Eduardo R. de Paula, Daniel M. Brum, Fábio G. Lepri, Ricardo J. Cassella

“…This aim of this work was to compare two methods for copper determination in insulating oils from power transformers by GFAAS. The first method was extraction…”
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Determinação espectrofotométrica de cefalexina em formulações farmacêuticas explorando a sua reação de transferência de carga com a quinalizarina Spectrophotometric determination of cephalexin in pharmaceutical formulations exploring its charge transfer reaction with quinalizarin by Carlos Eduardo R. de Paula, Vanessa G. K. Almeida, Ricardo J. Cassella

“…This work proposes a new simple and fast spectrophotometric method for cephalexin determination in pharmaceutical formulations. The method is based on the…”
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Avaliação de métodos de extração para a determinação de cromo e níquel em formulações farmacêuticas e em matérias-primas usadas na fabricação de medicamentos à base de cefalexina e ciprofloxacino by Carlos Eduardo R. de Paula, Daniel M. Brum, Luiz Fernando S. Caldas, Ricardo J. Cassella

“…This paper reports the evaluation of extraction strategies for the treatment of medicine samples to determine chromium and nickel by GFAAS. Different…”
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EVALUATION OF DIFFERENT METHODS FOR COPPER DETERMINATION IN INSULATING OILS BY GRAPHITE FURNACE ATOMIC ABSORPTION SPECTROMETRY by Caldas, Luiz Fernando S., Paula, Carlos Eduardo R. de, Brum, Daniel M., Lepri, Fábio G., Cassella, Ricardo J.

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Avaliação de métodos de extração para a determinação de cromo e níquel em formulações farmacêuticas e em matérias-primas usadas na fabricação de medicamentos à base de cefalexina e ciprofloxacino by de Paula, Carlos Eduardo R., Brum, Daniel M., Caldas, Luiz Fernando S., Cassella, Ricardo J.

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