2026-06-30T03:23:59Zhttps://riubu.ubu.es/oai/request

oai:riubu.ubu.es:10259/70842022-10-06T00:05:33Zcom_10259.4_2519com_10259.4_2512com_10259.4_106com_10259_2604com_10259_3592com_10259_3591com_10259_5363com_10259_5086com_10259_4313col_10259_6199col_10259_3930col_10259_5364col_10259_4314

Guirado Moreno, José Carlos González Ceballos, Lara Carreira Barral, Israel Ibeas Cortes, Saturnino Fernández Muiño, Miguel Ángel Sancho Ortiz, María Teresa García Pérez, José Miguel Vallejos Calzada, Saúl 2022-10-05T11:04:24Z 2022-10-05T11:04:24Z 2023-01 1386-1425 http://hdl.handle.net/10259/7084 10.1016/j.saa.2022.121820 We report on an innovative method to measure the Zn(II) concentration in commercial pet food samples, both wet and dry food. It is based on a colorimetric sensory polymer prepared from commercial monomers and 0.5 % of a synthetic monomer having a quinoline sensory core (N-(8-(2-azidoacetamido)quinolin-5-yl)methacrylamide). We obtained the sensory polymer as crosslinked films by thermally initiated bulk radical polymerization of the monomers of 100 μm thickness, which we punched into Ø6 mm sensory discs. The immersion of the discs in water solutions containing Zn(II) turned the fluorescence on, allowing for the titration of this cation using the G parameter of a digital picture taken to the discs. The limits of detection and quantification were 29 and 87 µg/L, respectively. Furthermore, we measured the concentration of Zn(II) even in the presence of other cations, detecting no significant interferences. Thus, in a further step, we obtained the concentration of Zn(II) from 15 commercial pet food samples, ranging from 19 to 198 mg/kg, following a simple extraction procedure and contacting the extractant with our sensory discs. These results were contrasted with that obtained by ICP-MS as a reference method. eng http://creativecommons.org/licenses/by/4.0/ info:eu-repo/semantics/openAccess Atribución 4.0 Internacional Zinc detection Zinc in food Sensory polymers Fluorescent probes RGB parameters Smart sensory polymer for straightforward Zn(II) detection in pet food samples info:eu-repo/semantics/article