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- W2037467175 abstract "Abstract The electrochemical behavior of alizarin red S (1,2-dihydroxyanthraquinone sulfonate, ARS) immobilized on electrochemically pretreated glassy carbon (GC) electrode by silica sol–gel process was investigated. The central quinone functionalities of the ARS molecule underwent quasi-reversible redox reaction. Oxidation of the dihydroxyl functionalities gave unstable products which underwent further follow-up chemical transformation to give new electroactive species. The results were applied to develop a reagentless sensor for the indirect determination of aluminum (Al) ions. Various experimental parameters, which influenced the properties of the modified electrode, were optimized. Under the optimum experimental conditions, the linear response range for Al3+ ions employing differential pulse voltammetry was 1.4×10−7 to 1.4×10 −6 mol l −1 and the relative standard deviation for 1×10 −6 mol l −1 Al3+ was 2.7% (n=7). The detection limit was 8×10 −8 mol l −1 . The modified electrode, as a reagentless sensor, is stable and portable. This method has been applied to determine Al in water samples." @default.
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- W2037467175 date "2004-05-01" @default.
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- W2037467175 title "Voltammetric determination of aluminum(III) using a reagentless sensor fabricated by sol–gel process" @default.
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