Sequential Injection Analysis
Mostrando 1-12 de 32 artigos, teses e dissertações.
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1. SEQUENTIAL MULTI-ELEMENT DETERMINATION OF TRACE-METALS IN BIODIESEL SAMPLES USING HR-CS FAAS
In this work the feasibility of sequential multi-element determination of Zn, Fe, Mg, Cu, Na, K, Cr, Al and Ca in biodiesel samples by high-resolution continuum source flame atomic absorption spectrometry (HR-CS FAAS) was investigated. Biodiesel samples obtained from different sources and different chemical processes were analysed. The samples were diluted w
Quím. Nova. Publicado em: 2021-02
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2. Sequential Injection Analysis with Square Wave Voltammetry (SI-SWV) Detection for Investigation of Adsorption of Picloram on a Clay Soil
This paper describes a sequential injection analysis method, with detection by square wave voltammetry using a hanging mercury drop electrode, to determine the herbicide picloram in soil extracts (0.010 mol L-1 CaCl2). The method was applied for determination of the Freundlich parameters related to adsorption of picloram on a tropical soil sample. The major
J. Braz. Chem. Soc.. Publicado em: 2015-10
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3. Determinação eletroquímica de glicerol em biodiesel por amperometria de múltiplos pulsos com eletrodo de ouro
Biodiesel is the fuel obtained from vegetable oils or animal fats that can partially or totally replace diesel oil. Besides being obtained from renewable sources, biodiesel is less polluting than diesel and biodegradable. One disadvantage of biodiesel is the byproduct of transesterification reaction of raw material, glycerol, which can cause damages to combu
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 22/06/2012
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4. Estudo de interação de Hg(II) com ligantes heterogêneos de ocorrência natural usando voltametria de redissolução anódica automatizada em sistema de análise por injeção sequencial / Interaction of Hg (II) with heterogeneous naturally occurring ligands studied by anodic stripping voltammetry automated by sequential injection analysis
Dentre as espécies químicas metálicas responsáveis pela contaminação do meio aquático, mercúrio e outros compostos mercuriais têm recebido atenção especial devido a sua alta toxicidade. Os ligantes de ocorrência natural formam complexos com íons de Hg2+, influenciando a sua biodisponibilidade. Em meio a esses ligantes, dá-se destaque aos ligant
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 07/05/2012
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5. Development of a fluorimetric sequential injection analysis (SIA) methodology for determination of quinine
Desenvolveu-se uma metodologia de análise por injeção sequencial (SIA) para a determinação fluorimétrica de quinino em refrigerantes. Dispersão mínima e mistura eficiente foram obtidas aspirando-se 200 mL de amostra entre duas zonas de 100 mL de reagente (0,10 mol L-1 H2SO4) a uma vazão de 250 mL s-1, usando uma bobina de reação de 50 cm de compri
Journal of the Brazilian Chemical Society. Publicado em: 2011-10
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6. Sequential injection analysis: a powerful tool for routine soil and plant laboratories.
Sequential injection (SIA) present attractive characteristics for analyses in large scale. In SIA the analytical determination can be perfomed automatically reducing the number of steps usually involved in a chemical analysis. In order to laboratory dedicated to routine analyze, the determination of volatile nitrogen in silge and soil samples has been perfor
INTERNATIONAL GRASSLAND CONGRESS. Publicado em: 2011
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7. Sequential injection analysis system with spectrophotometric detection for determination of norfloxacin and ciprofloxacin in pharmaceutical formulations
This work proposes a sequential injection analysis (SIA) system for the spectrophotometric determination of norfloxacin (NOR) and ciprofloxacin (CIP) in pharmaceutical formulations. The methodology was based on the reaction of these drugs with p-(dimethylamino)cinnamaldehyde in micellar medium, producing orange colored products (λmax = 495 nm). Beer´s law
Química Nova. Publicado em: 2011
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8. A análise por injeção sequencial (SIA): vinte anos em uma perspectiva brasileira
The year of 2010 marks the 20th anniversary of the development of Sequential Injection Analysis (SIA) by Ruzicka and Marshall. Considered the second generation of the flow injection methods, this article briefly describes the history, the basic principles of the technique and reviews all papers developed by Brazilian scientists aiming the divulgation of this
Química Nova. Publicado em: 2010
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9. Emprego da análise por injeção sequencial (SIA) e de métodos estatísticos para a otimização de processos oxidativos avançados visando o tratamento de amostras da indústria de tintas / Application of Sequential Injection Analysis (SIA) and Statistical Methods for the Optimization of Advanced Oxidative Processes Aiming the Treatment of Coatings Industry Samples
Esta Tese descreve o emprego da Análise por Injeção Sequencial (SIA) e de métodos estatísticos visando a otimização do tratamento de amostras da indústria de tintas através de Processos Oxidativos Avançados (POAs), mais especificamente através das reações de Fenton e foto-Fenton. Estudos foram realizados com o composto modelo vermelho de alizari
Publicado em: 2010
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10. Sistemas de análises químicas em fluxo explorando mecanismos de re-alimentação, calibração multivariada e outras abordagens para melhoria em desempenho / Flow systems exploiting feed-back mechanisms, multivariate calibration and other strategies for improving the analytical performance
Studies focusing on performance of intelligent analytical flow systems, association with multivariate calibration or use of nanocrystals as sensitizers were carried out. Moreover, improvements related to modifications in flow pattern were evaluated with emphasis to in-line dialysis. To this end, a strategy for implementing simultaneous determinations of iron
Publicado em: 2010
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11. Development of a flow through photo-reactor to study degradation of organic compounds by Sequential Injection Analysis (SIA)
Este trabalho descreve um foto-reator para a execução "in line" da degradação de compostos orgânicos através da reação de foto-Fenton, utilizando-se de um sistema de Análise por Injeção Sequencial (SIA). Uma solução do corante do sal tetrassódico de ácido 3,4',4²,4
Journal of the Brazilian Chemical Society. Publicado em: 2009
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12. Efeito do citrato de sildenafil sobre o controle autonômico cardiovascular em ratos normotensos.
Sildenafil citrate (Viagra) is a broadly used agent to treat erectile dysfunction. Several clinical trials, however, have demonstrated that in heart diseased patients in use of organic nitrates, the association with sildenafil could significantly enhance cardiac events risk. The possible mechanisms implicated in this increased risk are not completely
Publicado em: 2007