Arsenic Speciation
Mostrando 1-12 de 22 artigos, teses e dissertações.
-
1. DETERMINATION OF FOUR ARSENIC SPECIES IN ALGAE BY HIGH-PERFORMANCE LIQUID CHROMATOGRAPHY COUPLED WITH HYDRIDE GENERATION ATOMIC FLUORESCENCE SPECTROMETRY
A rapid method has been developed for the determination of silver arsenite As(III), dimethylated arsenic DMA, monomethylated arsenic MMA, and arsenate As(V) in algae sample using liquid chromatography coupled with hydride generation atomic fluorescence spectrometry (LC-HG-AFS). Types, flow rate and pH of mobile phase were optimized. Under the optimal conditi
Quím. Nova. Publicado em: 2020-09
-
2. 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
-
3. Arsenic Speciation in Fish and Rice by HPLC-ICP-MS Using Salt Gradient Elution
This paper presents arsenic speciation studies by high-performance liquid chromatography with inductively coupled plasma-mass spectrometer (HPLC-ICP-MS) using a chromatography column containing a strong anion exchange stationary phase (Agilent Bio SAX G3154A/101) for determination of arsenobetaine (AsB), dimethylarsinic acid (DMA), AsIII, monomethylarsonic a
J. Braz. Chem. Soc.. Publicado em: 2018-08
-
4. ARSÊNIO E ARROZ: TOXICIDADE, METABOLISMO E SEGURANÇA ALIMENTAR
Arsenic is considered a semimetal, and its wide distribution in the Earth's crust in different chemical forms, including organic and inorganic species, has a great deal of influence on the mechanisms of toxicity. Exposure to arsenic can be either through occupational practice (use of pesticides) or by the consumption of water and food containing the element.
Quím. Nova. Publicado em: 2015-01
-
5. 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
-
6. Stability of arsenic species in biological samples by coupling liquid chromatography or capillary electrophoresis with atomic detectors / Estabilidade de espécies de arsênio em amostras biológicas acoplando cromatografia líquida ou eletroforese capilar com detectores atômicos
Neste projeto foram abordados procedimentos analíticos para extração, separação e identificação de espécies de arsênio encontradas normalmente em quantidades de traços e ultra-traços em amostras biológicas e ambientais. Entre as amostras alvo deste estudo, teve-se alimentos de origem marinha como por exemplo camarão. Foi avaliada a estabilidade
Publicado em: 2010
-
7. 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
-
8. ESPECIAÇÃO DE COMPOSTOS DE ARSÊNIO EM ÁGUAS E FLUIDOS BIOLÓGICOS EMPREGANDO PRÉ-TRATAMENTO FOTOQUÍMICO E MÉTODOS VOLTAMÉTRICOS / SPECIATION OF ARSENIC COMPOUNDS IN WATER AND BIOLOGICAL FLUIDS BY PHOTOCHEMICAL PRETREATMENT AND VOLTAMMETRIC METHODS
The presence of arsenic as a contaminant in water and biological fluids has been studied in recent years due to the high toxicity of this element. In this work a method for the selective determination of arsenic species was developed, which is based on the determination of As(III) directly in the samples and on the determination of total arsenic after a phot
Publicado em: 2007
-
9. 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
-
10. 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
-
11. 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
-
12. Determinação de espécies de arsênio, antimônio e chumbo em antimoniato de meglumina por espectrometria de absorção atômica após extração em fase sólida. / Determination of arsenic, antimony and lead in meglumine antimoniate by atomic absorption spectrometry after extraction in solid phase.
In this study, two flow systems with a solid phase extraction were developed for the determination of Sb(III), Pb(II) As(V) and total As by atomic absorption spectrometry in sample of meglumine antimonate, which is the chosen medication in Brazil for treating leishmaniasis. For the determination of Sb(III) and Pb(II) with solid phase extraction and flame ato
Publicado em: 2006