Arsenic Speciation Analysis
Mostrando 1-8 de 8 artigos, teses e dissertações.
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1. SPECIATION ANALYSIS OF ARSENIC IN RICE USING HIGH PERFORMANCE LIQUID CHROMATOGRAPHY COUPLED WITH HYDRIDE GENERATION ATOMIC FLUORESCENCE SPECTROMETRY (HPLC-HG-AFS)
The aim of this work was to develop a method using high performance liquid chromatography coupled with hydride generation atomic fluorescence spectrometry (HPLC-HG-AFS) for the determination and speciation analysis of the inorganic and organic species of arsenic found most often in rice samples: As(V), As(III), monomethylarsonic acid (MMA), and dimethylarsin
Quím. Nova. Publicado em: 2020-06
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2. Especiação química de arsênio inorgânico no estuário da Laguna dos Patos (RS, Brasil)
This study optimized and validated a method to perform chemical speciation of inorganic arsenic in water samples collected under the Monitoring Program of the Port of Rio Grande-RS in July and October 2010 from the Laguna dos Patos Estuary (RS, Brazil). The flow injection hydride generation atomic absorption spectrometry technique was employed, allowing quan
Química Nova. Publicado em: 2012
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3. ANÁLISE DE ESPECIAÇÃO DE ARSÊNIO POR HG AAS COM APRISIONAMENTO CRIOGÊNICO E USO DE MULTIATOMIZADOR / ARSENIC SPECIATION ANALYSIS BY HG AAS WITH CRIOGENIC TRAPPING AND USE OF THE MULTIATOMIZER
Neste trabalho é proposto um procedimento para a análise de especiação de arsênio empregando pré-concentração com aprisionamento criogênico e determinação por espectrometria de absorção atômica com geração de hidretos (HG-CT-AAS). O procedimento foi aplicado para a análise de especiação de As em amostra biológica (fígado de frango) e de
Publicado em: 2010
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4. TRACE ELEMENTS DETERMINATION IN FOODS BY SS-GFAAS AND HG AFS / DETERMINAÇÃO DE ELEMENTOS TRAÇO EM ALIMENTOS POR SS-GFAAS E HG AFS
A qualidade de produtos alimentícios tem recebido especial atenção devido a sua importância na nutrição e saúde humanas. Neste sentido, a determinação de metais traço em alimentos tem se convertido em importante campo na análise de alimentos. Em relação aos óleos vegetais, a sua composição em termos de metais traço é um critério relevante
Publicado em: 2007
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5. APERFEIÇOAMENTO E APLICAÇÕES DE UMA METODOLOGIA PARA ANÁLISE DE ESPECIAÇÃO DE ARSÊNIO POR ELETROFORESE CAPILAR COM DETECTOR DE ICPMS / IMPROVEMENTS AND APPLICATIONS OF A METHODOLOGY FOR THE SPECIATION ANALYSIS OF ARSENIC USING CAPILLARY ELECTROPHORESIS WITH ICPMS DETECTOR
Capillary electrophoresis (CE) is a well established separation technique for the study of elemental speciation, however, its low electroosmotic flow nL min(-1) restricts its application in many studies in which low detection limits are required. For this reason, the study of CE coupling (hyphenation) to more sensitive detectors is of great relevance. This w
Publicado em: 2006
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6. INVESTIGAÇÃO SOBRE A FORMAÇÃO DE ESPÉCIES DE ARSÊNIO ORGÂNICO EM SOLUÇÕES DE NUTRIÇÃO PARENTERAL
Parenteral nutrition is the nutrients administration by intravenous mean in patients who cannot consume them for gastrointestinal way. Parenteral Nutrition Solutions are stored in glass and plastic containers, being the glass the most used due to its rigid structure, chemical resistance, sterilization easiness and transparency. Among glass constituents is th
Publicado em: 2006
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7. Especiação analítica de compostos de arsênio empregando métodos voltamétricos e polarográficos: uma revisão comparativa de suas principais vantagens e aplicações
This paper provides a review on voltammetric and polarographic methods for the speciation analysis of inorganic and organic arsenic compounds in different matrices. A discussion on the main advantages of electroanalytical methods in comparison with other analytical methods employed for arsenic speciation is presented. The mechanistic aspects of the most rele
Química Nova. Publicado em: 2004-04
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8. Mechanisms of Arsenic Hyperaccumulation in Pteris vittata. Uptake Kinetics, Interactions with Phosphate, and Arsenic Speciation1
The mechanisms of arsenic (As) hyperaccumulation in Pteris vittata, the first identified As hyperaccumulator, are unknown. We investigated the interactions of arsenate and phosphate on the uptake and distribution of As and phosphorus (P), and As speciation in P. vittata. In an 18-d hydroponic experiment with varying concentrations of arsenate and phosphate,
American Society of Plant Biologists.