2024-03-28T20:59:03Zhttps://riubu.ubu.es/oai/requestoai: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