Renewable magnetic ion-selective colorimetric microsensors based on surface modified polystyrene beads.
Colorimetry
Ion-selective optical sensor
Magnetic nanoparticle
Microspheres
Polystyrene bead
Potassium ion
Journal
Analytica chimica acta
ISSN: 1873-4324
Titre abrégé: Anal Chim Acta
Pays: Netherlands
ID NLM: 0370534
Informations de publication
Date de publication:
15 Jan 2020
15 Jan 2020
Historique:
received:
16
05
2019
revised:
30
09
2019
accepted:
07
10
2019
entrez:
26
11
2019
pubmed:
26
11
2019
medline:
26
11
2019
Statut:
ppublish
Résumé
Magnetic ion-selective colorimetric microspheres based on surface modification of polystyrene beads (0.8 μm diameter) are reported for the first time. The common components of ion-selective optode sensing (chromoionophore, ion-exchanger and ionophore) and magnetic nanoparticles are adsorbed onto the surface of the polystyrene particles using a simple mixed solvent method. The average diameter of the magnetic microspheres is evaluated by dynamic light scattering as 0.79 ± 0.06 μm. The reversible microsensors are circulated by flow and accumulated at a single spot by an applied magnet to become observable by digital camera. Hue signals are extracted from the recorded images to quantify the ratio of protonated and deprotonated form of the chromoionophore, which is the basis for optode response. The resulting magnetic microsensors respond to K
Identifiants
pubmed: 31761040
pii: S0003-2670(19)31207-3
doi: 10.1016/j.aca.2019.10.011
pii:
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
136-141Informations de copyright
Copyright © 2019 Elsevier B.V. All rights reserved.