title: Analysis of polar triazines and degradation products in waters by in-tube solid-phase microextraction and capillary chromatography: an environmentally friendly method.
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.
authors.affiliation: Department of Analytical Chemistry, University of Valencia, Dr. Moliner 50, 46100, Burjassot, Valencia, Spain.
authors.forename: Yolanda
authors.initials: Y
authors.lastname: Moliner-Martínez
authors.forename: Pascual
authors.initials: P
authors.lastname: Serra-Mora
authors.forename: Jorge
authors.initials: J
authors.lastname: Verdú-Andrés
authors.forename: Rosa
authors.initials: R
authors.lastname: Herráez-Hernández
authors.forename: Pilar
authors.initials: P
authors.lastname: Campíns-Falcó
mesh_terms: D002853:Chromatography, Liquid / Q000295:instrumentation / Q000379:methods*; D057230:Limit of Detection; D052617:Solid Phase Microextraction / Q000295:instrumentation / Q000379:methods*; D014227:Triazines / Q000737:chemistry* / Q000302:isolation & purification*; D014874:Water Pollutants, Chemical / Q000737:chemistry* / Q000302:isolation & purification*
chemical_list: D014227:Triazines; D014874:Water Pollutants, Chemical