Buscar
Mostrando ítems 1-10 de 39
Copper, zinc and manganese determination in saline samples employing faas after separation and preconcentration on Amberlite XAD-7 and Dowex 1x-8 loaded with Alizarin Red S
(2004)
Two procedures have been proposed and compared for separation and preconcentration of trace amounts of manganese, copper, and zinc in saline samples. The procedures are based in the use of Amberlite XAD-7 and an anion-exchanger ...
Kinetic study of the decomposition of hydrogen peroxide catalysed by Co(II) acetylacetonate supported on a silica-propylpiperazine matrix
(Elsevier Science BvAmsterdamHolanda, 1998)
Determination of tellurium at ultratrace levels in drinking water by on-line solid phase extraction coupled to graphite furnace atomic absorption spectrometer
(Elsevier, 2008-12)
In this paper, two time-based flow injection (FI) separation pre-concentration systems coupled to graphite furnace atomic absorption spectrometry (GFAAS) for tellurium determination are studied and compared. The first ...
Multivariate calibrations for the SR-TXRF determination of trace concentrations of lead and arsenic in the presence of bromine
(John Wiley & Sons LtdChichesterInglaterra, 2006)
Potencialidade do vermelho de Alizarina S impregnado em resinas para separação e pré-concentração de Cu, Zn e Mn em matrizes salinas
(Programa de Pós-Graduação em Química da UFBA, 2001)
A determinação de elementos traços por Espectrometria de Absorção Atômica com atomização por chama (FAAS) em matrizes com alto teor salino, tais como água do mar e salmouras, é limitada devido a vários fatores, principalmente ...
Determination of the betaine content of feed ingredients using high-performance liquid chromatography
(Wiley-Blackwell, 2002-10-01)
A series of studies was conducted to establish a methodology for the accurate and efficient determination of betaine in different feed ingredients. The final methodology involves an extraction step in which the feed sample ...
Optimizations on Lithium ion exchange separation and isotopic measurements
(Sociedade Brasileira de Espectrometria de Massas - BrMASS, 2023)