Domínguez Tello, AntonioDomínguez Alfaro, AntonioArias Borrego, AnaGómez Ariza, José LuisGarcía Barrera, Tamara2024-02-152024-02-152020Dominguez-Tello, A., Dominguez-Alfaro, A., Gómez-Ariza, J. L., Arias-Borrego, A., & García-Barrera, T. (2020). Effervescence-assisted spiral hollow-fibre liquid-phase microextraction of trihalomethanes, halonitromethanes, haloacetonitriles, and haloketones in drinking water. In Journal of Hazardous Materials (Vol. 397, p. 122790). Elsevier BV. https://doi.org/10.1016/j.jhazmat.2020.1227900304-38941873-3336 (electrónico)https://hdl.handle.net/10272/23240A new analytical method was optimized to determine 18 disinfection by-products (DBPs) in drinking water, including four different chemical groups. For this purpose, spiral-shaped hollow-fibre liquid phase microextraction with 1-octanol as the acceptor solvent assisted by effervescence was applied using a homemade supporting device that was specifically designed for this application. The device was printed in a 3D printer and allows for an increased fibre surface even with a low sample volume, which significantly facilitates the extraction. The samples were analysed by gas chromatography coupled to both an electron capture detector and a mass spectrometer for the quantification and unequivocal identification of the analytes, respectively. Effervescence was generated using citric acid and bicarbonate at a molar ratio 1:2, which significantly improves the extraction efficiency and reduces mechanical operations, since stirring and modifiers are not required. The results showed enrichment factors ranging from 13.1 to 140.1. Satisfactory recoveries (80-113 %) were obtained, with relative standard deviations from 3 to 15 % and good linearity. The detection limits (ng L-1) ranged from 10 to 35 (trihalomethanes), 12 to 220 (halonitromethanes), 17 to 79 (haloacetonitriles) and 10 to 16 (haloketones). The applicability of the method was assessed in 6 local water distribution systems.engAtribución-NoComercial-SinDerivadas 3.0 Españahttp://creativecommons.org/licenses/by-nc-nd/3.0/es/Disinfection by-productsSpiral hollow fibreEffervescenceThree-dimensional printingjournal article10.1016/j.jhazmat.2020.122790open access2301 Química Analítica