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dc.contributor.author
Fernández, Cintia Jimena  
dc.contributor.author
Domini, Claudia Elizabeth  
dc.contributor.author
Grunhut, Marcos  
dc.contributor.author
Lista, Adriana Guillermina  
dc.date.available
2019-12-04T16:08:34Z  
dc.date.issued
2018-04  
dc.identifier.citation
Fernández, Cintia Jimena; Domini, Claudia Elizabeth; Grunhut, Marcos; Lista, Adriana Guillermina; A soft material for chromium speciation in water samples using a chemiluminescence automatic system; Pergamon-Elsevier Science Ltd; Chemosphere; 196; 4-2018; 361-367  
dc.identifier.issn
0045-6535  
dc.identifier.uri
http://hdl.handle.net/11336/91352  
dc.description.abstract
A soft material formed by multiwall carbon nanotubes and 1-butyl-3-methyl imidazolium chloride was used as sorbent material to perform the chromium speciation in natural waters. This soft material was not yet used for the speciation of metals as chromium. Thus, a multicommutated flow system containing a minicolumn packed with the soft material was designed. The procedure was based on the capacity of the sorbent to retain Cr(VI) as Cr2O7= and allow to pass Cr(III) through the column. Then, a fully automated flow-batch analysis system was developed to quantify both species using chemiluminescence detection. Thus, Cr(III) was determined as catalyst of the luminol and hydrogen peroxide reaction and Cr(VI) as oxidant of luminol reaction. This represents a new approach because the oxidation of luminol using Cr2O7= has not been reported in literature. The variables of the two systems were optimized. The limits of detection were 1.4 μg L−1 for Cr(VI) and 4.0 μg L−1 for Cr(III). The precision of the method was 3.8% and 7.0% for Cr(VI) and Cr(III), respectively. The present method was applied to real water samples with recoveries between 95% and 107%. Besides, these results were in accordance with those obtained using inductive coupled plasma-optical emission spectrometry technique.  
dc.format
application/pdf  
dc.language.iso
eng  
dc.publisher
Pergamon-Elsevier Science Ltd  
dc.rights
info:eu-repo/semantics/openAccess  
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/  
dc.subject
AUTOMATIC SYSTEM  
dc.subject
CHEMILUMINESCENCE DETECTION  
dc.subject
CHROMIUM SPECIATION  
dc.subject
IONIC LIQUIDS  
dc.subject
MULTIWALLED CARBON NANOTUBES  
dc.subject.classification
Química Analítica  
dc.subject.classification
Ciencias Químicas  
dc.subject.classification
CIENCIAS NATURALES Y EXACTAS  
dc.title
A soft material for chromium speciation in water samples using a chemiluminescence automatic system  
dc.type
info:eu-repo/semantics/article  
dc.type
info:ar-repo/semantics/artículo  
dc.type
info:eu-repo/semantics/publishedVersion  
dc.date.updated
2019-10-21T20:18:31Z  
dc.journal.volume
196  
dc.journal.pagination
361-367  
dc.journal.pais
Países Bajos  
dc.journal.ciudad
Amsterdam  
dc.description.fil
Fil: Fernández, Cintia Jimena. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Química del Sur. Universidad Nacional del Sur. Departamento de Química. Instituto de Química del Sur; Argentina  
dc.description.fil
Fil: Domini, Claudia Elizabeth. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Química del Sur. Universidad Nacional del Sur. Departamento de Química. Instituto de Química del Sur; Argentina  
dc.description.fil
Fil: Grunhut, Marcos. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Química del Sur. Universidad Nacional del Sur. Departamento de Química. Instituto de Química del Sur; Argentina  
dc.description.fil
Fil: Lista, Adriana Guillermina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Química del Sur. Universidad Nacional del Sur. Departamento de Química. Instituto de Química del Sur; Argentina  
dc.journal.title
Chemosphere  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0045653517321562  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1016/j.chemosphere.2017.12.178