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• W2063689007 abstract "ABSTRACT We have shown previously that the anodic peak current of l-dopa decreases linearly with the increase of the concentration of aluminum (Al). In further studies, we have obtained three optimal experimental conditions for the determination of Al in the pH range from 3.6 to 9.2. Here, we are interested in the studies on the principle of the method. That Al coordinates with l-dopa through the electroactive catecholate donor group is demonstrated by physical techniques such as UV–vis, 13C NMR, and Raman spectrometries. The invariance of the electrooxidized species in the presence of Al is indicated in the plots of DPV anodic peak potential (E p) with pH, the plots of cyclic voltammetric anodic peak current (I p) with square root of scanning rates (ν1/2), and charge transfer coefficient (β) of l-dopa. The calculated pH values of maximum distributions of 1 : 1, 1 : 2, and 1 : 3 Al-l-dopa complexes are in good agreement with those three optimum pH values for the determination of Al respectively. Therefore, the principle of the method is that Al binding with l-dopa leads to the reduction of electrooxidatable electroactive site of l-dopa, and then results in the decrease of the DPV anodic peak current. The scientific significance of the principle is that it is expected to be fit for both cases: (1) use of ligands with electroactive donor groups similar to l-dopa, and (2) indirect determinations of electrochemical inert species by electroactive chemicals." @default.
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• W2063689007 date "2002-08-02" @default.
• W2063689007 modified "2023-10-02" @default.
• W2063689007 title "ELECTROCHEMICAL AND SPECTROMETRIC STUDIES ON THE PRINCIPLE OF INDIRECT DETER-MINATION OF ALUMINUM USING<scp>l</scp>-DOPA AS AN ELECTROACTIVE COMPLEXING LIGAND" @default.
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• W2063689007 doi "https://doi.org/10.1081/al-120002367" @default.
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