Selective determination of Cr (VI) by on-line solid phase extraction FI-SPE-FAAS using an ion exchanger resin as sorbent: an improvement treatment of the analytical signal

"A flow injection (FI) technique based on an on-line solid phase extraction (SPE) coupled with flame atomic absorption spectroscopy (FAAS) to selectively quantify chromium (VI) in the presence of chromium (III) was developed. An anion exchanger was used as solid sorbent and the detection limit...

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Autores principales: Rossi, Ezequiel, Errea, María Inés, Fidalgo de Cortalezzi, María Marta, Stripeikis, Jorge
Formato: Artículos de Publicaciones Periódicas acceptedVersion
Lenguaje:Inglés
Publicado: 2019
Materias:
CROMO
ESPECTROMETRIA DE ABSORCION ATOMICA
Acceso en línea:http://ri.itba.edu.ar/handle/123456789/1759
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Repositorio Institucional Instituto Tecnológico de Buenos Aires (ITBA) de Instituto Tecnológico de Buenos Aires (ITBA)
id I32-R138-123456789-1759
record_format dspace
spelling I32-R138-123456789-17592022-12-07T13:05:43Z Selective determination of Cr (VI) by on-line solid phase extraction FI-SPE-FAAS using an ion exchanger resin as sorbent: an improvement treatment of the analytical signal Rossi, Ezequiel Errea, María Inés Fidalgo de Cortalezzi, María Marta Stripeikis, Jorge CROMO ESPECTROMETRIA DE ABSORCION ATOMICA "A flow injection (FI) technique based on an on-line solid phase extraction (SPE) coupled with flame atomic absorption spectroscopy (FAAS) to selectively quantify chromium (VI) in the presence of chromium (III) was developed. An anion exchanger was used as solid sorbent and the detection limit found was two order of magnitude lower than that expected quantifying by FAAS. Until now, quantitative determinations in FAAS were carried out by measuring the height of the peaks rather than their area. In our hands, the software was reconfigured and the area under the peaks could be measured. Considering area instead of height, the enhancement factor increases from 6.7 to 360 (approx. 54 times) giving a detection limit of 0.034 μg·L − 1 , lower than that obtained using much more expensive instruments such as electrothermal atomic absorption spectrometry (ETAAS) or inductively coupled plasma-atomic emission spectrometry (IPC-AES), greatly enhancing the potential of this methodology for future use in speciation studies. The operation conditions were: pH 3, sample loading 50 mL·min − 1 , elution flow rate 7.5 mL·min − 1 . The anion exchanger lifetime was over 100 adsorption/desorption cycles. Anions commonly present in natural aqueous systems did not interfere in the chromium retention. The accuracy was validated using a certified reference material (Fluka Analytical, QC3453)." 2019-09-18T20:15:29Z 2019-09-18T20:15:29Z 2017-01 Artículos de Publicaciones Periódicas info:eu-repo/semantics/acceptedVersion 0026-265X http://ri.itba.edu.ar/handle/123456789/1759 en info:eu-repo/semantics/altIdentifier/doi/10.1016/j.microc.2016.08.004 repo/grantAgreement/ITBA/AR. Ciudad de Buenos Aires 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 CROMO
ESPECTROMETRIA DE ABSORCION ATOMICA
spellingShingle CROMO
ESPECTROMETRIA DE ABSORCION ATOMICA
Rossi, Ezequiel
Errea, María Inés
Fidalgo de Cortalezzi, María Marta
Stripeikis, Jorge
Selective determination of Cr (VI) by on-line solid phase extraction FI-SPE-FAAS using an ion exchanger resin as sorbent: an improvement treatment of the analytical signal
topic_facet CROMO
ESPECTROMETRIA DE ABSORCION ATOMICA
description "A flow injection (FI) technique based on an on-line solid phase extraction (SPE) coupled with flame atomic absorption spectroscopy (FAAS) to selectively quantify chromium (VI) in the presence of chromium (III) was developed. An anion exchanger was used as solid sorbent and the detection limit found was two order of magnitude lower than that expected quantifying by FAAS. Until now, quantitative determinations in FAAS were carried out by measuring the height of the peaks rather than their area. In our hands, the software was reconfigured and the area under the peaks could be measured. Considering area instead of height, the enhancement factor increases from 6.7 to 360 (approx. 54 times) giving a detection limit of 0.034 μg·L − 1 , lower than that obtained using much more expensive instruments such as electrothermal atomic absorption spectrometry (ETAAS) or inductively coupled plasma-atomic emission spectrometry (IPC-AES), greatly enhancing the potential of this methodology for future use in speciation studies. The operation conditions were: pH 3, sample loading 50 mL·min − 1 , elution flow rate 7.5 mL·min − 1 . The anion exchanger lifetime was over 100 adsorption/desorption cycles. Anions commonly present in natural aqueous systems did not interfere in the chromium retention. The accuracy was validated using a certified reference material (Fluka Analytical, QC3453)."
format Artículos de Publicaciones Periódicas
acceptedVersion
author Rossi, Ezequiel
Errea, María Inés
Fidalgo de Cortalezzi, María Marta
Stripeikis, Jorge
author_facet Rossi, Ezequiel
Errea, María Inés
Fidalgo de Cortalezzi, María Marta
Stripeikis, Jorge
author_sort Rossi, Ezequiel
title Selective determination of Cr (VI) by on-line solid phase extraction FI-SPE-FAAS using an ion exchanger resin as sorbent: an improvement treatment of the analytical signal
title_short Selective determination of Cr (VI) by on-line solid phase extraction FI-SPE-FAAS using an ion exchanger resin as sorbent: an improvement treatment of the analytical signal
title_full Selective determination of Cr (VI) by on-line solid phase extraction FI-SPE-FAAS using an ion exchanger resin as sorbent: an improvement treatment of the analytical signal
title_fullStr Selective determination of Cr (VI) by on-line solid phase extraction FI-SPE-FAAS using an ion exchanger resin as sorbent: an improvement treatment of the analytical signal
title_full_unstemmed Selective determination of Cr (VI) by on-line solid phase extraction FI-SPE-FAAS using an ion exchanger resin as sorbent: an improvement treatment of the analytical signal
title_sort selective determination of cr (vi) by on-line solid phase extraction fi-spe-faas using an ion exchanger resin as sorbent: an improvement treatment of the analytical signal
publishDate 2019
url http://ri.itba.edu.ar/handle/123456789/1759
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