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Biochanin A (BnA) a natural o-methylated isoflavone, is isolated from the leaves of Eupatorium adenaphorum and is effectively utilized as a sensor probe for copper ion with good selectivity and sensitivity. The effect with the presence of other metal ions is also investigated and BnA is found to be selective towards Cu2+ ion over other metal ions such as Zn2+, Sn2+, Ni2+, Ag+, Bi2+, Pb2+, Co3+, In...
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