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From the first issue of 2016, Chromatography has changed its name to Separations.

Open AccessArticle
Chromatography 2015, 2(3), 515-528; doi:10.3390/chromatography2030515

Evaluation of Carbon Nanotubes Functionalized Polydimethylsiloxane Based Coatings for In-Tube Solid Phase Microextraction Coupled to Capillary Liquid Chromatography

Departamento de Química Analítica, Facultad de Química, Universidad de Valencia. Dr. Moliner 50, E46100 Burjassot, Valencia, Spain
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Author to whom correspondence should be addressed.
Academic Editor: Mary Boyce
Received: 30 March 2015 / Revised: 17 July 2015 / Accepted: 31 July 2015 / Published: 10 August 2015
(This article belongs to the Special Issue Solid Phase Micro-Extraction)
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Abstract

In the present work, the performance of carbon nanotubes (c-CNTs) functionalized polydimethylsiloxane (PDMS) based coatings as extractive phases for in-tube solid phase microextraction (IT-SPME) coupled to Capillary LC (CapLC) has been evaluated. Carboxylic-single walled carbon nanotubes (c-SWNTs) and carboxylic-multi walled carbon nanotubes (c-MWNTs) have been immobilized on the activated surface of PDMS capillary columns. The effect of different percentages of diphenyl groups in the PDMS extractive phase has also been evaluated. The extraction capability of the capillary columns has been tested for different organic pollutants, nitrogen heterocyclic compounds and polycyclic aromatic compounds (PAHs). The results indicated that the use of the c-CNTs-PDMS capillary columns improve pyriproxyfen and mainly PAH extraction. Triazines were better extracted by unmodified TRB-35 and modified c-CNTs-PDMSTRB-5. The results showed that the extraction capability of the c-CNT capillary columns depends not only on the polarity of the analytes (as it occurs with PDMS columns) but also on the interactions that the analytes can establish with the immobilized c-CNTs on the PDMS columns. The extraction efficiency has been evaluated on the basis of the preconcentration rate that can be achieved, and, in this sense, the best c-CNTs-PDMS capillary column for each group of compounds can be proposed. View Full-Text
Keywords: in-tube solid phase microextraction; carbon nanotubes; polydimethylsiloxane; nitrogen heterocyclic compounds and polycyclic aromatic hydrocarbon in-tube solid phase microextraction; carbon nanotubes; polydimethylsiloxane; nitrogen heterocyclic compounds and polycyclic aromatic hydrocarbon
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Jornet-Martínez, N.; Serra-Mora, P.; Moliner-Martínez, Y.; Herráez-Hernández, R.; Campíns-Falcó, P. Evaluation of Carbon Nanotubes Functionalized Polydimethylsiloxane Based Coatings for In-Tube Solid Phase Microextraction Coupled to Capillary Liquid Chromatography. Chromatography 2015, 2, 515-528.

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