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  • Title: Visual detection of Al(3+) ions using conjugated copolymer-ATP supramolecular complex.
    Author: Tu MC, Rajwar D, Ammanath G, Alagappan P, Yildiz UH, Liedberg B.
    Journal: Anal Chim Acta; 2016 Mar 17; 912():105-10. PubMed ID: 26920778.
    Abstract:
    A colorimetric Al(3+) sensor based on fluorescence recovery of a conjugated copolymer-ATP complex is proposed. An optimized ratio of two polythiophene (PT) monomers is utilized to synthesize copolymer (CP) that yielded maximized colorimetric response for Al(3+) in deionized (DI) and tap water. The electrostatic disassembly of CP-ATP upon addition of Al(3+) led to an evident visual color change. The lowest concentration of Al(3+) for naked eye observation is around 4 μM, which is below the threshold levels in drinking water according to European Economic Community (EEC) standard. Besides, the proposed assay showed a similar response to Al(3+) in tap water. The proposed methodology showed selective and sensitive detection for Al(3+) in analytically relevant concentration ranges without involving sophisticated instrumentation, illustrating the applicability for on-site drinking water monitoring.
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