Zobrazeno 1 - 10
of 45
pro vyhledávání: '"Zully Benzo"'
Publikováno v:
Química Nova, Vol 33, Iss 3, Pp 653-655 (2010)
The levels of several chemical elements were determined simultaneously in ten different beers of the Venezuelan market by ICP-OES. With the exception of chromium, beer does not provide important amounts of nutritional oligoelements. The average chrom
Externí odkaz:
https://doaj.org/article/c49fad7810ab4f589dee8eb5e3ca0b34
Publikováno v:
Repositorio Universidad Regional Amazónica
Universidad Regional Amazónica
instacron:IKIAM
Universidad Regional Amazónica
instacron:IKIAM
Solid-state species deposited on L'vov platforms during ETAAS of vanadium solutions were studied by X-ray photoelectron spectroscopy. The presence of vanadium carbide (VC) during ashing and atomization stages was confirmed.
Publikováno v:
Surface Science. 677:149-160
Adsorptions of molybdenum species and interactions on a model pyrolytic graphite platform (PGP) sites were calculated employing quantum methods (density functional theory (DFT) and parametric method number 6 (PM6)). The aim of this work is to propose
Autor:
Alberto Albornoz, Vladimir León, Joaquín L Brito, Frine Ruiz, Zully Benzo, Fernando Ruette, Angel Garaboto
Publikováno v:
Spectrochimica Acta Part B: Atomic Spectroscopy. 133:1-8
X-ray photoelectron spectroscopy (XPS) was employed as the analytical tool for the identification of the solid state species formed during the atomization of molybdenum on a pyrolytic graphite surface used for electrothermal atomization in atomic abs
Autor:
Maribel Valero, David Freire, Zully Benzo, Joaquín L Brito, Ángela B. Sifontes, Wendy Rondón, Yorbin González
Publikováno v:
American Journal of Analytical Chemistry. :584-593
This work consists in the use of a 3A zeolite (K-LTA) obtained by a process of exchange of sodium for potassium (4A zeolite), synthesized from Venezuelan kaolin for the removal of Pb (II) ions from aqueous solutions by batch process mode in order to
Autor:
M. de la Guardia, Altos de Pipe, Zully Benzo, M.N. Matos-Reyes, Maria Luisa Cervera, Moliner Street
Publikováno v:
Journal of the Brazilian Chemical Society. 22:1782-1787
e percentagens de recuperacao entre 97 e 103%. A aplicabilidade do sistema foi demonstrada na determinacao simultânea de Ca, Cd, Co, Cr, Cu, Fe, Mg, Mn, Mo, Ni, Zn, As, Bi, Sb, Se e Te em amostras certificadas para elementos tracos, NIST 1549 (leite
Autor:
Eunice Marcano, Zully Benzo, Manuelita Quintal, C. Gomez, Janeth Salas, Domingo Maldonado, José Chirinos
Publikováno v:
Microchemical Journal. 93:127-132
The operating characteristics of a number of locally constructed inductively coupled plasma (ICP) dual sample introduction designs used for the determination of volatile and non volatile elements have been compared. Four cyclonic spray chamber arrang
Publikováno v:
Journal of Materials Science: Materials in Medicine. 20:2249-2257
The mechanochemical transformation of Ca(OH)(2)-(NH(4))(2)HPO(4) with different Ca/P ratios 1; 1.5; 1.67 and 1.75 was carried out for different periods of time from 10 min to 24 h in a horizontal vibration mill using steel and agate vials and balls.
Autor:
Zully Benzo, Domingo Maldonado, C. Gomez, Manuelita Quintal, Janeth Salas, Eunice Marcano, José Chirinos
Publikováno v:
Instrumentation Science & Technology. 36:598-610
A dual sample introduction system that combines the benefits of nebulization and vapour generation in a single device is described. It consists of two commercial conventional concentric nebulizers coupled to a modified cyclonic chamber. The effect(s)
Autor:
Domingo Maldonado, Janeth Salas, José Chirinos, Manuelita Quintal, C. Gomez, Eunice Marcano, Gina D'Suze, Zully Benzo
Publikováno v:
Microchimica Acta. 162:93-99
The analytical performance of a low cost direct injection high efficiency nebulizer (DIHEN) with replaceable capillary is evaluated and compared with a high efficiency nebulizer HEN-cyclonic spray chamber arrangement for sample introduction at lower