2026-10-12T00:21:04Zhttps://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

00925njm 22002777a 4500 dc Guirado Moreno, José Carlos author González Ceballos, Lara author Carreira Barral, Israel author Ibeas Cortes, Saturnino author Fernández Muiño, Miguel Ángel author Sancho Ortiz, María Teresa author García Pérez, José Miguel author Vallejos Calzada, Saúl author 2023-01 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. 1386-1425 http://hdl.handle.net/10259/7084 10.1016/j.saa.2022.121820 Zinc detection Zinc in food Sensory polymers Fluorescent probes RGB parameters Smart sensory polymer for straightforward Zn(II) detection in pet food samples