The role of carbonaceous materials as water channels in membrane sensors together with acrylate polymerized cyclodextrin, for determination of azoxystrobin in canned food

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Abstract Fungicides of huge organic chemical structures may face some hindrance in passage across membranes of ion-selective electrodes. Thus, the invention of passages within the membrane matrix that selectively engulf these compounds, facilitating their transfer through the membrane. Carbonaceous materials of nanosized range showed superior ability in increasing ion transfer in comparison with carbon nanotubes. Their combination with acrylates-polymerized-cyclodextrin as ionophore, created two pathways for large organic molecules across the membrane. Application of both inventions in fabrication of three sensors using carbon nanotubes, graphene quantum dots, and nanographene oxide, enabled trace analysis of azoxystrobin fungicide in ranges (10-12 -10-5, 10-13 -10-4 and 10-13 -10-6 M), respectively, with high selectivity.

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