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Mostrando ítems 111-120 de 213
Mecanismo de acumulação de ferro e arsênio em biomassa vegetal fibrosa
(Universidade Federal de Minas GeraisUFMG, 2008-03-07)
The general aim of the present work is to study iron and arsenic sorption in dried and ground lettuce leaves, in order to investigate in detail the mechanism of arsenic accumulation on lettuce. Several spectroscopic ...
Distribution and bioavailability of arsenic in natural waters of a mining area studied by ultrafiltration and diffusive gradients in thin films
(2016-12-01)
The distribution of metals and metalloids among particulate, dissolved, colloidal, free, and labile forms in natural waters is of great environmental concern since it determines their transportation behaviour and ...
Application of a central composite design to the determination of inorganic and organic arsenic species in water by liquid chromatography-hydride generation-atomic absorption spectrometryAplicación de un diseño central compuesto para la determinación de especies de arsénico orgánicas e inorgánicas en agua por cromatografía líquida - generación de hidruros -espectrometría de absorción atómicaAplicació del disseny compost central a la determinació d’espècies inorgàniques i orgàniques d’arsènic en aigua per cromatografia líquida–espectrometria d’absorció atòmica amb generació d’hidrurs
(Asociación de Químicos e Ingenieros, 2009-05)
An on-line high performance liquid chromatography - hydride generation atomic absorption spectrometry coupled system (HPLC–HG–AAS) has been used for the determination of [As (III)], [As (V)], monomethylarsonic acid (MMA) ...
Distribution, redox state and (bio)geochemical implications of arsenic in present day microbialites of Laguna Brava, Salar de Atacama
(Elsevier Science, 2018-06)
Understanding how microorganisms adapted to the high arsenic concentration present on early Earth requires understanding of the processes involved in the arsenic biogeochemical cycle operating in living microbial mats. To ...
Avaliação de técnicas com plasma acoplado indutivamente para a determinação de constituintes inorgânicos no ciclo produtivo do frango de corte e iodo em sal de cozinha
(Universidade Federal de São CarlosBRUFSCarPrograma de Pós-Graduação em Química - PPGQ, 2013-04-26)
The aim of this thesis was the development of procedures for the determination of total arsenic, selenium and chromium in chicken production-related samples and iodine in table salt using inductively coupled plasma methods. ...
Análise de especiação de arsênio por HG AAS com aprisionamento criogênico e uso de multiatomizador
(Universidade Federal de Santa MariaBRQuímicaUFSMPrograma de Pós-Graduação em Química, 2010-02-08)
In this work a procedure for arsenic speciation using criogenic trapping coupled to hydride generation atomic absorption spectrometry (HG-CT-AAS) was developed. Biological (chiken liver) and drug (N-methylglucamine ...
Evaluation of inorganic arsenic species in drinking water of the southeastern of the Buenos Aires province, Argentina
(2014)
Arsenic in natural water is a worldwide concern due to chronic health effects in people exposed through the drinking water. The aim was to evaluate the distribution of As(III) and As(V), through ASV, in an Argentine area ...