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dc.contributor.author
Guiñez, María Evangelina  
dc.contributor.author
Bazan, Cristian Roberto  
dc.contributor.author
Martinez, Luis Dante  
dc.contributor.author
Cerutti, Estela Soledad  
dc.date.available
2019-10-25T22:56:48Z  
dc.date.issued
2018-06-21  
dc.identifier.citation
Guiñez, María Evangelina; Bazan, Cristian Roberto; Martinez, Luis Dante; Cerutti, Estela Soledad; Determination of nitrated and oxygenated polycyclic aromatic hydrocarbons in water samples by a liquid–liquid phase microextraction procedure based on the solidification of a floating organic drop followed by solvent assisted back-extraction and liquid chromatography–tandem mass spectrometry; Elsevier Science; Microchemical Journal; 139; 21-6-2018; 164-173  
dc.identifier.issn
0026-265X  
dc.identifier.uri
http://hdl.handle.net/11336/87353  
dc.description.abstract
A methodology was optimized for the determination of nitrated-PAHs (nitro-PAHs) and oxygenated-PAHs (oxy-PAHs) in natural waters. The extraction/preconcentration procedure was performed by liquid–liquid phase microextraction based on the solidification of a floating organic drop followed by a novel solvent assisted back-extraction (DLLME-SFO-SBE) combined with liquid chromatography-tandem mass spectrometry. The solvent assisted back extraction into a suitable solvent enabled the direct injection of nitro and oxy-PAHs into the UHPLC-(+)APCI-MS/MS system. Parameters affecting the efficiency of the back-extraction procedure were evaluated and optimized, including the nature of the back-extractant volume, temperature and agitation effect. Additionally, various strategies related to the emulsion formation process were assayed. Detection and quantification limits were in the range of 0.02–0.85 ng mL−1 and 0.15–1.10 ng mL−1. Acceptable extraction recoveries between 95.1 and 100% and enrichment factors between 192 and 200-fold, with relative standard deviations <7.6%, were obtained. The method was successfully applied to the analysis of different types of water samples. In addition, concentration levels of nitro-PAHs and oxy-PAHs ranging from 0.97 to 7.16 ng mL−1 and from 0.69 to 2.36 ng mL−1; respectively, were detected in lake water. The proposed methodology is an easy, sensitive, and accurate analytical approach for determining nitrated and oxygenated PAHs of environmental concern in water samples.  
dc.format
application/pdf  
dc.language.iso
eng  
dc.publisher
Elsevier Science  
dc.rights
info:eu-repo/semantics/openAccess  
dc.rights.uri
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/  
dc.subject
DLLME-SFO  
dc.subject
LIQUID CHROMATOGRAPHY&ndash;TANDEM MASS SPECTROMETRY  
dc.subject
NITRATED POLYCYCLIC AROMATIC HYDROCARBONS  
dc.subject
OXYGENATED POLYCYCLIC AROMATIC HYDROCARBONS  
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SOLVENT ASSISTED BACK-EXTRACTION  
dc.subject
WATER SAMPLES  
dc.subject.classification
Química Analítica  
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Ciencias Químicas  
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CIENCIAS NATURALES Y EXACTAS  
dc.title
Determination of nitrated and oxygenated polycyclic aromatic hydrocarbons in water samples by a liquid–liquid phase microextraction procedure based on the solidification of a floating organic drop followed by solvent assisted back-extraction and liquid chromatography–tandem mass spectrometry  
dc.type
info:eu-repo/semantics/article  
dc.type
info:ar-repo/semantics/artículo  
dc.type
info:eu-repo/semantics/publishedVersion  
dc.date.updated
2019-10-21T19:48:45Z  
dc.journal.volume
139  
dc.journal.pagination
164-173  
dc.journal.pais
Países Bajos  
dc.journal.ciudad
Amsterdam  
dc.description.fil
Fil: Guiñez, María Evangelina. 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: 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: Martinez, Luis Dante. 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: Cerutti, Estela Soledad. 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; Argentina  
dc.journal.title
Microchemical Journal  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0026265X17308056  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/https://doi.org/10.1016/j.microc.2018.02.027