Listar Química Analítica - (QA) por título
Mostrando ítems 140-159 de 192
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Searching for Biosignatures in Mars by Differentiation of LIBS Molecular Signals
Delgado-Pérez, Tomás
(2022)
If there was life in the past on the Red Planet, specific biosignatures might still be present only if preservation conditions have been favourable for them [1]. The recognition of the habitable past on Mars increases the ... -
Searching for Biosignatures in Mars by LIBS Molecular Signals Discernment
Delgado-Pérez, Tomás; García-Gómez, Laura; Cabalín-Robles, Luisa María; Laserna-Vázquez, José Javier; Fortes-Román, Francisco Javier (2021)
In the present study, LIBS analysis of a set of six selected molecules related to organic biosignatures -or their degradation compounds- have been carried out in both simulated Martian atmosphere and air in order to identify ... -
Secondary ion mass spectrometry and low-energy ion scattering of II-V semiconductor hetero-structures
Laserna-Vázquez, José Javier; Padilla, D.; Vadillo-Pérez, José Miguel (Sociedad Española de Química Analítica, 2013)
Comunicación oral presentada durante la XVIII reunión de la Sociedad Española de Química Analítica y VI reunión Nacional de la Sociedad Española de Espectrometría de MAsas -
Semiautomatic method for the ultra-trace arsenic speciation in environmental and biological samples via magnetic solid phase extraction prior to HPLC-ICP-MS determination
Montoro-Leal, Pablo; García-Mesa, Juan Carlos; Morales-Benítez, Irene; García-de-Torres, Amparo; Vereda-Alonso, Elisa Isabel (Elsevier B.V., 2021)
A novel magnetic functionalized material based on graphene oxide and magnetic nanoparticles (MGO) was used to develop a magnetic solid phase extraction method (MSPE) to enrich both, inorganic and organic arsenic species ... -
Semiautomatic method for the ultra-trace arsenic speciation in environmental waters via magnetic solid phase extraction prior to HPLC-ICP-MS determination
Montoro-Leal, Pablo; García-Mesa, Juan Carlos; López-Guerrero, María del Mar; Siles-Cordero, María Teresa; Vereda-Alonso, Elisa Isabel (2021-01-08)
A new magnetic functionalized material based on graphene oxide magnetic nanoparticles (MGO) was designed and characterized in order to develop a magnetic solid phase extraction method (MSPE) to enrich both inorganic and ... -
Sensitive determination of mercury by magnetic dispersive solid-phase extraction combined with flow-injection-cold vapour-graphite furnace atomic absorption spectrometry
García-Mesa, Juan Carlos; Montoro-Leal, Pablo; Maireles-Rivas, Silvia; López-Guerrero, María del Mar; Vereda-Alonso, Elisa Isabel (Royal Society of Chemistry, 2021-03-31)
Mercury is a non-essential trace element that is toxic to humans due to the bioaccumulation effect. In this work, a ferrofluid based on Fe3O4@graphene oxide nanospheres together with an ionic liquid was used to develop a ... -
Sequential determination of heavy metals in environmental water samples by flow injection-chemical vapour generation-inductively coupled plasma mass spectrometry
Sanchez, Irene; García-de-Torres, Amparo; Vereda-Alonso, Elisa Isabel; Cano-Pavón, José Manuel (2013-12-19)
The toxicity of “heavy metals” has been well recognized for a long time. Often the non-specific term “heavy metals” is used for three of the metals, cadmium, mercury and lead. These have large bioconcentration factors in ... -
Sequential determination of traces of As, Sb and hg by on-line magnetic solid phase extraction coupled with Hr-Cs-Cvg-Gfaas
Cárdenas Valdivia, Abel; Vereda-Alonso, Elisa Isabel; López-Guerrero, María del Mar; García-de-Torres, Amparo; Cano-Pavón, José Manuel (2017-09-21)
A green and rapid method was developed for the simultaneous separation/preconcentration and sequential monitoring pf arsenic, antimony and mercury by flow injection magnetic solid phase extraction coupled with on-line ... -
Simultaneous determination of PT, PD, RH and IR traces in environmental samples by flow injection solid phase extraction coupled with online inductively coupled plasma atomic emission spectroscopy (ICP-AES)
Calvo-Fornieles, Ana; García-de-Torres, Amparo; Vereda-Alonso, Elisa Isabel; Cano-Pavón, José Manuel (2014-07-23)
An increased worldwide usage of platinum group elements (PGEs) has been observed during the last twenty years due to their applications in areas such as chemical industry, metallurgy, jewelry production, dental devices, ... -
Simultaneous determination of traces of PT, PD, OS, IR, RH, AG and AU by using magnetic nanoparticles solid phase extraction coupled with ICP OES
López-Guerrero, María del Mar; Vereda-Alonso, Elisa Isabel; Cano-Pavón, José Manuel; García-de-Torres, Amparo (2017-09-21)
The direct analysis of these target analytes is very limited being essential sample pre-treatment techniques and the use of very sensitive instrumental techniques to carry out determinations. The inductively coupled plasma ... -
Simultaneous enrichment of inorganic and organic species of lead, mercury and vanadium via magnetic solid phase extraction prior to HPLC-ICP-MS determination using a new functionalized patented nanomaterial
Montoro-Leal, Pablo; García-Mesa, Juan Carlos; Morales-Benítez, Irene; López-Guerrero, María del Mar; Vereda-Alonso, Elisa Isabel (X NyNA 2022, 2022-09)
A novel magnetic functionalized nanomaterial based on graphene oxide and magnetic nanoparticles (MGO) was prepared and characterized by several spectroscopic and imaging techniques. This material was packed in a magnetic ... -
Simultaneous LIBS acoustic detection for mineral differentiation. Imaging and standoff studies under terrestrial and martian atmospheric conditions
Álvarez-Llamas, César; Bosáková, Markéta; Purohit, Pablo; Moros-Portolés, Javier; Laserna-Vázquez, José Javier (2022)
The combination of data simultaneously generated by laser-induced breakdown spectroscopy (LIBS) and laser-induced acoustics (LIAc) is a topic of many potential applications as both phenomena cover different sample traits. ... -
Simultaneous preconcentration and determination of trace metals (V, Ni, Ti, and Ga) in environmental samples by high resolution continuum source electrothermal atomic absorption spectrometry.
Vázquez‑Palomo, Laura; Montoro-Leal, Pablo; García-Mesa, Juan Carlos; López-Guerrero, María del Mar; Vereda-Alonso, Elisa Isabel (2023)
In this work is presented a simple, sensitive, low-cost method for direct and simultaneous determination of V, Ti, Ni and Ga by electrothermal atomic absorption spectrometer (ETAAS) in aqueous environmental samples (tap ... -
Single-shot laser-ionization mass spectrometry for direct atomic analysis
Vadillo-Pérez, José Miguel; Laserna-Vázquez, José Javier (2017-11-09)
Direct laser ionization of solids (LIMS, laser-ionization mass spectrometry) represents a powerful way to get full atomic information about sample microlocations. Spatial resolutions as low a few microns are easily attainable ... -
Síntesis y aplicación de un nuevo nanomaterial magnético para la especiación online de cromo en muestras acuosas
Morales-Benítez, Irene; García-Mesa, Juan Carlos; Montoro-Leal, Pablo; López-Guerrero, María del Mar; Vereda-Alonso, Elisa Isabel (2022-07)
En este trabajo, se ha desarrollado un nuevo método de doble reactor para el análisis y especiación de cantidades traza de iones Cr (III)/Cr (VI) en muestras ambientales que combina la extracción magnética en fase sólida ... -
Sistemas analíticos miniaturizados integración de sistemas microelectrónicos con sensores químicos
(2015-05-21)La charla resume los aspectos técnicos y aplicados más relevantes de la integración de dispositivos microelectrónicos y microfluídicos con objeto de miniaturizar las medidas químicas en los laboratorios. -
Size-dependent synergetic seeding effects in the inspection of airborne dry nanoaerosols by LIBS.
Purohit, Pablo; Fortes-Román, Francisco Javier; Malegiannaki, I.; Jaime-Fernández, Lourdes; Laserna-Vázquez, José Javier (Elsevier, 2021-11-18)
In the present paper, confined dry Cu nanoaerosols of controlled particle size are inspected under a time-resolved LIBS scheme to explore the effect of laser-particulate matter interaction upon the detection capability of ... -
Solid sampling determination of ZnO nanoparticles in eyeshadows by graphite furnace atomic absorption spectrometry
García-Mesa, Juan Carlos; Montoro-Leal, Pablo; Vereda-Alonso, Elisa Isabel; López-Guerrero, María del Mar; Siles-Cordero, María Teresa; García-de-Torres, Amparo; Cano-Pavón, José Manuel[et al.] (2019-05-29)
The application of nanoparticles (NPs) in science and technology is a fast growing field. Therefore, reliable and straightforward analytical methods are required for their fast determination in different types of samples. ... -
sp-ICP-MS and HR–CS–GFAAS as useful available techniques for the size characterization and speciation of ionic and nanoparticular zinc in cosmetic and pharmaceutical samples
García-Mesa, Juan Carlos; Morales-Benítez, Irene; Montoro-Leal, Pablo; López-Guerrero, María del Mar; Vereda-Alonso, Elisa Isabel (Elsevier, 2023-10-29)
The use of zinc oxide nanoparticles (ZnO NPs) in cosmetic and pharmaceutical industry has been increased in recent years due to their good properties as solar radiation filters and antibacterial agent. According to the ... -
Spectral identification in the attogram regime through laser induced breakdown spectroscopy of single optically-trapped nanoparticles in air
Laserna-Vázquez, José Javier; Purohit, Pablo (2017-10-20)
Current trends in nanoengineering are bringing along new structures of diverse chemical compositions that need to be meticulously defined to ensure their correct operation. Few methods can provide the sensitivity required ...