Glass Carbon Electrode
Mostrando 1-12 de 14 artigos, teses e dissertações.
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1. INFLUÊNCIA DA FORÇA IÔNICA NA ESTIMATIVA DE pKa POR MÉTODO VOLTAMÉTRICO
The voltammetry is an important analytical technique and also useful for pKa determination. It is a usual procedure of this technique to employ inert electrolyte concentration 100 times higher than redox compound concentration further a pH buffer. However, the ionic strength changes with the solution pH. In this work, we study the consequences of this proced
Quím. Nova. Publicado em: 2020-12
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2. Preparation of a Nitrite Electrochemical Sensor Based on Polyaniline/ Graphene‑Ferrocenecarboxylic Acid Composite Film Modified Glass Carbon Electrode and its Analytical Application
A sensitive and stable electrochemical sensor based on polyaniline/graphene-ferrocenecarboxylic acid (PANI/GR-FCA) composite film modified glass carbon electrode for determination of nitrite was presented and its morphology and structure were characterized by scanning electron microscope (SEM), transmission electron microscope (TEM), Fourier transform infrar
J. Braz. Chem. Soc.. Publicado em: 2015-10
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3. Determinação voltamétrica de ricina em mamona usando carbono vítreo e diamante dopado com boro / Voltammetric determination of ricin in castor bean using gassy carbon and boron doped diamond.
Ricin (RCA 60) is an inhibitor of ribosomes protein toxic, of class II, extracted from castor bean endosperm of the seed, consisting of two peptide chains (RCA-A 30 and RCA-B 30) linked by a disulfide bridge covalently formed by the combination of 17 amino acid residues. Its toxicity has been observed in animals, insects and humans, being by inhalation, inge
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 23/03/2012
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4. Desenvolvimento de eletrodos de carbono vítreo modificados com nanotubos de carbono funcionalizados imobilizados em filmes de hidrocloreto de poli(alilamina) para determinação de fármacos / Abstract development of a glass carbon electrode modified with functionalized carbon nanotubes immobilized in hydrochloride poly (allylamine) films for pharmaceuticals determination
Pesquisas envolvendo nanotubos de carbono (NTC) apresentam um grande atrativo desde a sua síntese até a aplicação tecnológica. Como parte do trabalho foi estudado a formação e a estabilidade de uma dispersão de nanotubos de carbono de paredes múltiplas (MWCNTs) funcionalizados em uma solução do polieletrólito hidrocloreto de poli(alilamina) (PAH)
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 18/02/2011
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5. Atividade eletrocatalítica de sistemas biomiméticos da enzima catalase
In this work, we describe the immobilization of the dinuclear compound [Cu2(apyhist)2Cl2](ClO4)2 (1) and its derived cations complexes, obtained in water solution or by deprotonation of the imidazolate moiety in the ligand leading to a cyclic tetranuclear species, in the Nafion® membrane on glass carbon electrode surface. After that, we studied the influenc
Química Nova. Publicado em: 2011-09
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6. Electrochemical behavior of vitreous glass carbon and platinum electrodes in the ionic liquid 1-n-butyl-3-methylimidazolium trifluoroacetate
A janela eletroquímica do líquido iônico trifluoroacetato de 1-n-butil-3-metilimidazólio foi estudada sobre eletrodos de carbono vítreo e platina em condições estática e dinâmica. Observouse uma drástica diminuição da janela eletroquímica ao trocar o eletrodo de carbono vítreo (4.50 V) pelo de platina (2.50 V). A variação da velocidade de rot
Publicado em: 2010
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7. Use of biomimetic systems at the preparation of amperometric sensors / Utilização de sistemas biomiméticos no Preparo de sensores amperométricos
This work describe the immobilization of the copper(II) dinuclear complex ([Cu2(apyhist)2Cl2](ClO4)2), (apyhist =[(4-imidazolyl)ethylene-2-amino-1-ethylpyridine]), and others similar copper(II) compounds mono- and tetranuclears, obtained in water solution or for desprotonation of the imidazole ligant, in the Nafion membrane on glass carbon electrode surface,
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 04/09/2009
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8. VALIDATION OF METHOD FOR DETERMINATION OF ELETRO-ANALYTICAL EUGENOL ESSENTIAL OIL IN KIND OF Cinnamomum zeylamicum (CANELA) / VALIDAÇÃO DE MÉTODO PARA DETERMINAÇÃO ELETROANALÍTICA DE EUGENOL EM ÓLEO ESSENCIAL DA ESPÉCIE Cinnamomum zeylamicum (CANELA)
Este trabalho relata a otimização e validação de um método eletro-analítico para determinação de eugenol em óleo essencial, obtido das folhas verdes de Cinnamomum zeylamicum (canela), com aplicação testada em outros óleos essenciais de interesse científico, como o Origanum (orégano) e Pimenta dioica L (pimenta dióica). A espécie vegetal foi c
Publicado em: 2008
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9. DETERMINAÇÃO DO PARAQUAT SOBRE ELETRODOS DE CARBONO VÍTREO MODIFICADO COM FTALOCIANINA TETRASSULFONADA DE NIQUEL EM FILME DE POLI-L-LISINA / DETERMINATION OF THE PARAQUAT ON MODIFIED GLASS CARBON ELECTRODES WITH FTALOCIANINA TETRASSULFONADA OF NICKEL IN POLI-L-LISINA FILM
This work present an evaluation of a modified glassy carbon electrode with NiTSPc immobilized with film PLL of the determination of paraquat by differential pulse voltammetry. The film was formed applying 20μL of a solution prepared for the mixture of equal volume of NiTSPc 0,8mM and poly-L-lisine (PLL) 0,12mM. The maximum signal to noice ratio was obta
Publicado em: 2007
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10. Supramolecular chemistry of tetrapyridylporphyrins associated with platinum(II) complexes / Química supramolecular de tetrapiridilporfirinas associadas a complexos de platina(II)
The synthesis, characterization and investigation of the molecular and supramolecular behaviour of meso-tetrapyridylporphyrins containing four chloro(bipyridine) platinum(II) complexes attached at the meta and para positions of the peripheral pyridine ligands is focused on this thesis. The isomeric supermolecules were isolated in the solid state, and extensi
Publicado em: 2006
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11. ImobilizaÃÃo de Xantina Oxidase em Polissiloxano-Ãlcool PolivinÃlico Magnetizado
Xanthine oxidase (xanthine:oxygen oxidoreductase, XOD, E.C. 1.17.3.2) is a relevant molybdenum enzyme in clinical analysis with a well-established structure and mode of action. It has already been immobilized on several matrices such as polyacrylamide gel beads, polyamide-11, Dacron, polyaniline-silicone, modified carbon paste electrode, nanocrystal gold-car
Publicado em: 2005
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12. Fabrication of Amperometric Electrodes
Carbon fiber electrodes are crucial for the detection of catecholamine release from vesicles in single cells for amperometry measurements. Here, we describe the techniques needed to generate low noise (<0.5 pA) electrodes. The techniques have been modified from published descriptions by previous researchers (1,2). Electrodes are made by preparing carbon f
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