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dc.contributor.author
Bazan, Cristian Roberto  
dc.contributor.author
Gil, Raul Andres  
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Smichowski, Patricia Nora  
dc.contributor.author
Pacheco, Pablo Hugo  
dc.date.available
2017-12-28T14:52:59Z  
dc.date.issued
2014-06  
dc.identifier.citation
Pacheco, Pablo Hugo; Smichowski, Patricia Nora; Gil, Raul Andres; Bazan, Cristian Roberto; Multivariate optimization of a solid phase extraction system employing l-tyrosine immobilized on carbon nanotubes applied to molybdenum analysis by inductively coupled plasma optical emission spectrometry with ultrasound nebulization; Elsevier; Microchemical Journal; 117; 6-2014; 40-45  
dc.identifier.issn
0026-265X  
dc.identifier.uri
http://hdl.handle.net/11336/31780  
dc.description.abstract
A method for Mo solid phase extraction on l-tyrosine immobilized on carbon nanotubes (l-tyr-CNTs) is presented. l-tyr-CNTs were used to fill a minicolumn and introduced into a FI system employing inductively coupled plasma optical emission spectrometry with ultrasound nebulization (USN-ICP OES). Five FI parameters such as buffer flow rate (BFR) and concentration (BC); sample flow rate (SFR); eluent flow rate (EFR) and concentration (EC); and pH were chosen for optimization employing a half fraction composite design (HFFD). Multivariate optimization through central composite design (CCD) allowed establishing the statistical ideal parameter values to reach maximum Mo signal. From HFFD and CCD it was established that SFR was not affecting the system significantly and that the optimal experimental conditions were: pH, 4.0; BC, 5 mM ammonium acetate; EC, 15% (v v− 1) and EFR, 2 mL min− 1. Under these conditions an enhancement factor of 750-fold (25 for preconcentration system and 30 for USN) was obtained reaching a detection limit of 40 ng L− 1 with a precision of 1.32%. The system was successfully applied to a certified reference material NIST CRM 1643e (trace elements in water) and river, thermal, mine and tap water samples.  
dc.format
application/pdf  
dc.language.iso
eng  
dc.publisher
Elsevier  
dc.rights
info:eu-repo/semantics/openAccess  
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/  
dc.subject
Molybdenum  
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L-Tyrosine  
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Carbon Nanotubes  
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Multivariate Optimization  
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Otras Ciencias Químicas  
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Ciencias Químicas  
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CIENCIAS NATURALES Y EXACTAS  
dc.title
Multivariate optimization of a solid phase extraction system employing l-tyrosine immobilized on carbon nanotubes applied to molybdenum analysis by inductively coupled plasma optical emission spectrometry with ultrasound nebulization  
dc.type
info:eu-repo/semantics/article  
dc.type
info:ar-repo/semantics/artículo  
dc.type
info:eu-repo/semantics/publishedVersion  
dc.date.updated
2017-12-12T18:38:42Z  
dc.journal.volume
117  
dc.journal.pagination
40-45  
dc.journal.pais
Países Bajos  
dc.journal.ciudad
Ámsterdam  
dc.description.fil
Fil: Bazan, Cristian Roberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Luis. Instituto de Química de San Luis. Universidad Nacional de San Luis. Facultad de Química, Bioquímica y Farmacia. Instituto de Química de San Luis; Argentina  
dc.description.fil
Fil: Gil, Raul Andres. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Luis. Instituto de Química de San Luis. Universidad Nacional de San Luis. Facultad de Química, Bioquímica y Farmacia. Instituto de Química de San Luis; Argentina  
dc.description.fil
Fil: Smichowski, Patricia Nora. Comisión Nacional de Energía Atómica; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina  
dc.description.fil
Fil: Pacheco, Pablo Hugo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Luis. Instituto de Química de San Luis. Universidad Nacional de San Luis. Facultad de Química, Bioquímica y Farmacia. Instituto de Química de San Luis; Argentina  
dc.journal.title
Microchemical Journal  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0026265X14001064  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1016/j.microc.2014.06.003