Composite materials based on hybrid mesoporous solids for flow through determination of ultratrace levels of Cd(II)

"In this work we present a solid phase extraction (SPE) flow through system coupled to graphite furnace atomic absorption spectrometry (GFAAS) for the determination of Cd(II) at ultratrace levels. The flow system holds a minicolumn which was filled, one in turn, with three different lab made ma...

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Detalles Bibliográficos
Autores principales: Minaberry, Yanina Susana, Stripeikis, Jorge, Tudino, Mabel Beatriz
Formato: Artículos de Publicaciones Periódicas acceptedVersion
Lenguaje:Inglés
Publicado: info
Materias:
ESPECTROMETRIA DE ABSORCION ATOMICA
CADMIO
ADSORCION
Acceso en línea:http://ri.itba.edu.ar/handle/123456789/1626
Aporte de:
Repositorio Institucional Instituto Tecnológico de Buenos Aires (ITBA) de Instituto Tecnológico de Buenos Aires (ITBA)
id I32-R138-123456789-1626
record_format dspace
spelling I32-R138-123456789-16262022-12-07T13:06:59Z Composite materials based on hybrid mesoporous solids for flow through determination of ultratrace levels of Cd(II) Minaberry, Yanina Susana Stripeikis, Jorge Tudino, Mabel Beatriz ESPECTROMETRIA DE ABSORCION ATOMICA CADMIO ADSORCION "In this work we present a solid phase extraction (SPE) flow through system coupled to graphite furnace atomic absorption spectrometry (GFAAS) for the determination of Cd(II) at ultratrace levels. The flow system holds a minicolumn which was filled, one in turn, with three different lab made materials: a) mesoporous silica functionalized with 3-aminopropyl groups from 3-aminopropyl triethoxysilane (HMS); b) HMS with a resin, Amberlite IR120; c) HMS-Amberlite IR120 and polyvinyl alcohol (PVA). All the solids were characterized by FTIR and SEM. Batch experiments were performed in order to study the optimum adsorption pH, the adsorption kinetics and the maximum adsorption capacity.The materials were compared in terms of their aptitude for the pre-concentration of the analyte under dynamic conditions. Microvolumes of HCl were employed for the release of cadmium and its introduction into the electrothermal atomizer. The operational variables of the flow system were also tested and optimized. The comparison of the figures of merit revealed HMS-A-PVA as the best option from an analytical point of view: limit of detection= 4.7 ng L-1, limit of quantification= 16 ng L-1, RSD %= 4 (n =6, 100 ng L-1), linear range: from LOQ up to 200 ng L-1 and a lifetime over 600 cycles with no obstructions to the free movement of fluids, material bleeding or changes on the analytical sensitivity. The proposed method was shown to be tolerable to several ions typically present in natural waters and was successfully applied to determination of trace of Cd(II) in real samples. A full discussion of the main findings with emphasis on the interaction metal ion/fillings will be provided." info:eu-repo/date/embargoEnd/2019-07-14 2019-06-19T19:15:43Z 2019-06-19T19:15:43Z 2018-07 Artículos de Publicaciones Periódicas info:eu-repo/semantics/acceptedVersion 1759-9660 http://ri.itba.edu.ar/handle/123456789/1626 en info:eu-repo/semantics/altIdentifier/doi/10.1039/c8ay00879e info:eu-repo/grantAgreement/CONICET/11220130100140CO/AR. Ciudad Autónoma de Buenos Aires info:eu-repo/grantAgreement/UBA/UBACyT/20020130100099BA/AR. Ciudad Autónoma de Buenos Aires info:eu-repo/semantics/embargoedAccess application/pdf
institution Instituto Tecnológico de Buenos Aires (ITBA)
institution_str I-32
repository_str R-138
collection Repositorio Institucional Instituto Tecnológico de Buenos Aires (ITBA)
language Inglés
topic ESPECTROMETRIA DE ABSORCION ATOMICA
CADMIO
ADSORCION
spellingShingle ESPECTROMETRIA DE ABSORCION ATOMICA
CADMIO
ADSORCION
Minaberry, Yanina Susana
Stripeikis, Jorge
Tudino, Mabel Beatriz
Composite materials based on hybrid mesoporous solids for flow through determination of ultratrace levels of Cd(II)
topic_facet ESPECTROMETRIA DE ABSORCION ATOMICA
CADMIO
ADSORCION
description "In this work we present a solid phase extraction (SPE) flow through system coupled to graphite furnace atomic absorption spectrometry (GFAAS) for the determination of Cd(II) at ultratrace levels. The flow system holds a minicolumn which was filled, one in turn, with three different lab made materials: a) mesoporous silica functionalized with 3-aminopropyl groups from 3-aminopropyl triethoxysilane (HMS); b) HMS with a resin, Amberlite IR120; c) HMS-Amberlite IR120 and polyvinyl alcohol (PVA). All the solids were characterized by FTIR and SEM. Batch experiments were performed in order to study the optimum adsorption pH, the adsorption kinetics and the maximum adsorption capacity.The materials were compared in terms of their aptitude for the pre-concentration of the analyte under dynamic conditions. Microvolumes of HCl were employed for the release of cadmium and its introduction into the electrothermal atomizer. The operational variables of the flow system were also tested and optimized. The comparison of the figures of merit revealed HMS-A-PVA as the best option from an analytical point of view: limit of detection= 4.7 ng L-1, limit of quantification= 16 ng L-1, RSD %= 4 (n =6, 100 ng L-1), linear range: from LOQ up to 200 ng L-1 and a lifetime over 600 cycles with no obstructions to the free movement of fluids, material bleeding or changes on the analytical sensitivity. The proposed method was shown to be tolerable to several ions typically present in natural waters and was successfully applied to determination of trace of Cd(II) in real samples. A full discussion of the main findings with emphasis on the interaction metal ion/fillings will be provided."
format Artículos de Publicaciones Periódicas
acceptedVersion
author Minaberry, Yanina Susana
Stripeikis, Jorge
Tudino, Mabel Beatriz
author_facet Minaberry, Yanina Susana
Stripeikis, Jorge
Tudino, Mabel Beatriz
author_sort Minaberry, Yanina Susana
title Composite materials based on hybrid mesoporous solids for flow through determination of ultratrace levels of Cd(II)
title_short Composite materials based on hybrid mesoporous solids for flow through determination of ultratrace levels of Cd(II)
title_full Composite materials based on hybrid mesoporous solids for flow through determination of ultratrace levels of Cd(II)
title_fullStr Composite materials based on hybrid mesoporous solids for flow through determination of ultratrace levels of Cd(II)
title_full_unstemmed Composite materials based on hybrid mesoporous solids for flow through determination of ultratrace levels of Cd(II)
title_sort composite materials based on hybrid mesoporous solids for flow through determination of ultratrace levels of cd(ii)
publishDate info
url http://ri.itba.edu.ar/handle/123456789/1626
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AT stripeikisjorge compositematerialsbasedonhybridmesoporoussolidsforflowthroughdeterminationofultratracelevelsofcdii
AT tudinomabelbeatriz compositematerialsbasedonhybridmesoporoussolidsforflowthroughdeterminationofultratracelevelsofcdii
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