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|Title:||Poly(pyrogallol) film on glassy carbon electrode for selective preconcentration and stripping voltammetric determination of Sb(III)|
|Authors:||Beng Khoo, S. |
Differential pulse stripping voltammetry
Modified glassy carbon electrode
|Citation:||Beng Khoo, S.,Zhu, J. (1998-11-02). Poly(pyrogallol) film on glassy carbon electrode for selective preconcentration and stripping voltammetric determination of Sb(III). Analytica Chimica Acta 373 (1) : 15-27. ScholarBank@NUS Repository. https://doi.org/10.1016/S0003-2670(98)00386-9|
|Abstract:||Oxidative electropolymerization of pyrogallol at the glassy carbon electrode in phosphate buffer (pH 7.00) gave a stable, water-insoluble film, adherent on the electrode surface. This poly(pyrogallol) film modified glassy carbon electrode was exploited for the selective preconcentration of Sb(III) at an open circuit, followed by its determination by differential pulse anodic stripping voltammetry both in batch and continuous flow regimes. Factors affecting the accumulation, reduction, stripping and removal steps were investigated and an optimized procedure was then developed. Under optimized conditions, for batch determination, the calibration curve was linear in the range 5.00x10-9 to 1.00x10-7M Sb(III) (10min accumulation). A detection limit of 4.1x10-10M Sb(III) (0.050ppb) (S/N=3) was found for a 10min accumulation. For eight successive determinations of Sb(III) at concentrations of 1.00x10-8 and 5.00x10-9M, relative standard deviations were 2.4% and 6.0%, respectively. Similar results were obtained for continuous flow determination. Interferences from selected metals and other inorganic ions and organic substances were examined. The developed method was applied to Sb determinations in human hair and seawater samples, both in batch and continuous flow systems. Copyright (C) 1998 Elsevier Science B.V.|
|Source Title:||Analytica Chimica Acta|
|Appears in Collections:||Staff Publications|
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