RT info:eu-repo/semantics/article
T1 Colorimetric detection, quantification and extraction of Fe(III) in water by acrylic polymers with pendant Kojic acid motifs
A1 Vallejos Calzada, Saúl
A1 Muñoz Santamaría, María Asunción
A1 García García, Félix Clemente
A1 Colleoni, Roberta
A1 Biesuz, Raffaela
A1 Alberti, Giancarla
A1 García Pérez, José Miguel
K1 Sensory polymers
K1 Kojic acid
K1 visual detection
K1 iron detection
K1 iron extraction
K1 Chemistry
K1 Química
AB We synthesized a solid sensory material for the extraction, detection and quantification of iron(III) in aqueous media. The material is a film-shaped colorless polymer membrane that exhibits gel behavior. The Fe(III) extraction and sensing characteristics are imparted by a new monomer derived from a natural product (i.e., Kojic acid), which exhibits chelating properties toward Fe(III). The sorption of Fe(III) on the membrane in water has been thoroughly characterized, including the sorption kinetics, sorption isotherms and profiles as a function of the pH. Fe(III) sorption followed pseudo first-order kinetics and required approximately 30 min to reach equilibrium. The maximum sorption capacity was approximately 0.04 mmol/g, and the sorption isotherms are well modeled by the Langmuir equation. The complexes that were found in the solid phase are in good agreement with those previously identified in the aqueous phase. Moreover, the sorption is highly specific (i.e., a recognition process) and results from the formation of a colored complex (iron(III)-Kojic acid derivative moieties). Therefore, the colorless sensory membrane turns red upon immersion in aqueous solutions containing Fe(III). The color output allows for both the qualitative visual determination of the Fe(III) concentration as well as also titration of Fe(III) using a) a UV/vis technique (limit of detection of 3.6 × 10−5 M; dynamic range of five decades, lower concentration = 1.65 × 10−6 M) and b) a computer vision-based analytical chemistry approach via color definition of the sensory membrane (RGB parameters) obtained from an image recorded with a handy device (e.g., a smartphone) (limit of detection of 2.0 × 10−5 M).
PB Elsevier
YR 2016
FD 2016-10
LK http://hdl.handle.net/10259/4324
UL http://hdl.handle.net/10259/4324
LA eng
NO Spanish Ministerio de Economía y Competitividad-Feder(MAT2014-54137-R) and by the Consejería de Educación—Junta deCastilla y León (BU232U13).
DS Repositorio Institucional de la Universidad de Burgos
RD 23-nov-2024