Optimisation of a solid-phase microextraction procedure for the determination of triazines in water with gas chromatography–mass spectrometry detection

• Published in: Journal of Chromatography A 2003-07, Vol.1007 (1), p.127-135
• Main Authors: Frı́as, S, Rodrı́guez, M.A, Conde, J.E, Pérez-Trujillo, J.P
• Format: Article
• Language: English
• Subjects: Analysis methods; Analytical chemistry; Applied sciences; Chemistry; Chromatographic methods and physical methods associated with chromatography; Exact sciences and technology; Gas chromatographic methods; Gas Chromatography-Mass Spectrometry - methods; Herbicides - analysis; Hydrogen-Ion Concentration; Natural water pollution; Osmolar Concentration; Pesticides; Pollution; Sensitivity and Specificity; Triazines; Water treatment and pollution
• ISSN: 0021-9673
• DOI: 10.1016/S0021-9673(03)00957-9

A procedure based on solid-phase microextraction (SPME) and gas chromatography–mass spectrometry, operating in the chemical ionisation mode, was developed and optimised in order to determine 10 triazines in water samples. Five different SPME fibers available for analysis [polydimethylsiloxane (PDMS) 100 μm, polyacrylate (PA) 80 μm, PDMS–divinylbenzene (DVB) 65 μm, Carbowax (CW)–DVB 65 μm, and Carboxen (CAR)–PDMS 75 μm] were tested, and PDMS–DVB was selected. To enhance the sensitivity of the SPME, variables affecting adsorption and desorption steps such as temperature, time, pH and ionic strength of the solution were optimised. Detection limits obtained were ranged between 2 and 17 ng l −1, and precision values were below 8% for the selected PDMS–DVB fiber. The optimised method was applied to real water samples and no triazines were detected.