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US 2026/0298865 A1Published application
Aluminum ion sensor and method to detect aluminum ion concentration
AssigneeThe American University in Cairo
InventorsNada ALI, Tamer SHOEIB, Norhan BADRELDIN
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Abstract
A screen-printed sensor for detecting aluminum ions in food and biological samples is provided. The sensor includes an aluminum ion-selective membrane containing quercetin as an aluminum ionophore and multi-walled carbon nanotubes. The sensor provides a low-cost point of analysis method to determine aluminum ion concentration in a range of from 0.008 to 1070 μM in food and beverage materials, reflecting the general detection capability of the sensor under aqueous conditions.
Claims35
A solid-contact Al ion-selective electrode, comprising:
- a substrate;
- a layer of an electrically conductive carbon material applied to a surface of the substrate;
- an ion-selective membrane in contact with the layer of electrically conductive carbon material, the ion-selective membrane comprising:
- quercetin;
- multi-walled carbon nanotubes (MWCNT's);
- a plasticizer;
- a polymer;
- and
- an ion exchange material,
- wherein
- the MWCNT's form a network of interconnected fibers at the surface of the membrane, which is a capacitive/electrical double-layer (EDL) transducer that stabilizes an electrode potential, and
- the solid-contact Al ion-selective electrode is free of an internal filling solution.
9 more elements
A potentiometric aluminum ion sensor, comprising:
- a planar substrate;
- a screen-printed solid-contact Al ion-selective electrode on the planar substrate;
- a screen-printed Ag/AgCl reference electrode electrically isolated from the solid-contact Al ion-selective electrode on the substrate;
- wherein
- each electrode is configured to be placed in electrical contact with a potentiometer,
- the screen printed solid-contact Al ion selective electrode comprises:
- a layer of an electrically conductive carbon material applied to a surface of the substrate;
- an ion-selective membrane in contact with the layer of electrically conductive carbon material, the ion-selective membrane comprising:
- quercetin;
- multi-walled carbon nanotubes (MWCNT's);
- a plasticizer;
- a polymer;
- and
- an ion exchange material,
- wherein the MWCNT's form a network of interconnected fibers at the surface of the membrane, which is a capacitive/electrical double-layer (EDL) transducer that stabilizes an electrode potential, and
- the solid-contact Al ion-selective electrode is free of an internal filling solution.
13 more elements
Dependencies are inferred from the claim text.