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Analysis of polar triazines and degradation products in waters by in-tube solid-phase microextraction and capillary chromatography: an environmentally friendly method

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Abstract

This paper describes a new method for the determination of polar triazines, including some degradation products, which combines online in-tube solid-phase microextraction (IT-SPME) and capillary liquid chromatography with UV-diode array detection (DAD). Different extractive coatings have been evaluated for IT-SPME, a capillary column with a polydimethylsiloxane (PDMS) coating, and the same coating modified with carboxylated single-wall carbon nanotubes (c-SWCNTs) and carboxylated multiwall carbon nanotubes (c-MWCNTs). On the basis of the results obtained, a new method is presented for the identification and determination of triazines in water samples. A careful selection of the eluent composition provides the required selectivity and sensitivity for the quantification of the target analytes, even those highly polar (log K ow ≤ 2.3). The proposed conditions have been successfully used for the quantitation of the analytes in the 0.25–50.0 μg L−1 range. The limits of detection (LODs) are in the 0.02–0.1 μg L−1 range, and the intraday and interday relative standard deviation (RSD) coefficients are ≤9 and ≤17 %, respectively. The reliability of the described method has been tested by analyzing several real water samples. The proposed method can be considered an environmentally friendly and cost-effective alternative for routine monitoring of triazines and their degradation products in waters.

Schematic diagram of the system used for the analysis of triazines

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Acknowledgments

The authors are grateful to the Spanish Ministerio de Economia y Competitividad (project CTQ 2011-26760) and to the Generalitat Valenciana (project ACOMP/2013/155) for the financial support received.

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Authors and Affiliations

  1. Department of Analytical Chemistry, University of Valencia, Dr. Moliner 50, 46100, Burjassot, Valencia, Spain

    Yolanda Moliner-Martínez, Pascual Serra-Mora, Jorge Verdú-Andrés, Rosa Herráez-Hernández & Pilar Campíns-Falcó

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  1. Yolanda Moliner-Martínez
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  2. Pascual Serra-Mora
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  3. Jorge Verdú-Andrés
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Correspondence to Rosa Herráez-Hernández.

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Moliner-Martínez, Y., Serra-Mora, P., Verdú-Andrés, J. et al. Analysis of polar triazines and degradation products in waters by in-tube solid-phase microextraction and capillary chromatography: an environmentally friendly method. Anal Bioanal Chem 407, 1485–1497 (2015). https://doi.org/10.1007/s00216-014-8366-7

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  • DOI: https://doi.org/10.1007/s00216-014-8366-7

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