Artículo de Publicación Periódica:
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

dc.contributor.authorRossi, Ezequiel
dc.contributor.authorErrea, María Inés
dc.contributor.authorFidalgo de Cortalezzi, María Marta
dc.contributor.authorStripeikis, Jorge
dc.date.accessioned2019-09-18T20:15:29Z
dc.date.available2019-09-18T20:15:29Z
dc.date.issued2017-01
dc.description.abstract"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)."en
dc.identifier.issn0026-265X
dc.identifier.urihttp://ri.itba.edu.ar/handle/123456789/1759
dc.language.isoenen
dc.relationinfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.microc.2016.08.004
dc.relationrepo/grantAgreement/ITBA/AR. Ciudad de Buenos Aires
dc.subjectCROMOes
dc.subjectESPECTROMETRIA DE ABSORCION ATOMICAes
dc.titleSelective 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 signalen
dc.typeArtículos de Publicaciones Periódicases
dc.typeinfo:eu-repo/semantics/acceptedVersion
dspace.entity.typeArtículo de Publicación Periódica
itba.description.filiationFil: Rossi, Ezequiel. Instituto Tecnológico de Buenos Aires; Argentina.
itba.description.filiationFil: Rossi, Ezequiel. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina.
itba.description.filiationFil: Errea, María Inés. Instituto Tecnológico de Buenos Aires; Argentina.
itba.description.filiationFil: Fidalgo de Cortalezzi, María Marta. University of Missouri--Columbia; Estados Unidos.
itba.description.filiationFil: Stripeikis, Jorge. Instituto Tecnológico de Buenos Aires; Argentina.
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