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- W4382141436 abstract "Antimony trioxide-modified carbon paste electrode (Sb2O3-CPE) was developed and tested in combination with square-wave anodic stripping voltammetry as a new “mercury-free” sensor for the determination of selected heavy metal ions at the low μg L-1 concentration level. Measurements were carried out using non-deaerated solutions of 0.01 M HCl (pH 2) with Cd(II) + Pb(II) as model ions. Several important experimental parameters, e.g. deposition potential, deposition time, and the concentration of hydrochloric acid were studied and optimized, when the electroanalytical performance of the Sb2O3-CPE was critically compared with bismuth trioxide-modified carbon paste electrode (Bi2O3-CPE), and with the in-situ prepared antimony film carbon paste electrode (SbF-CPE) using either 0.01 M HCl (pH 2.0) or 0.1 M CH3COOH + CH3COONa (pH 4.4) as the supporting media. In contrast to other configurations of antimony film-operated electrodes, the Sb2O3-CPE has exhibited well-defined anodic stripping signals also in acetate buffer, proving thus itself to be generally applicable in both mild and more acidic supporting media. The sensor of interest showed a fairly linear behaviour in the concentration range of 10-100 μg L-1, offering good reproducibility and favourable detection limits of about 1 μg L-1 for Cd(II) and of 0.7 μg L-1 Pb(II) in combination with 90 s accumulation. The practical applicability of the Sb2O3-CPE, when the electrode could also be applied in the stripping chronopotentiometric operating mode (with chemical oxidation), was demonstrated on the voltammetric determination of Cd(II) and Pb(II) in sample of tap water." @default.
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- W4382141436 date "2012-01-01" @default.
- W4382141436 modified "2023-10-16" @default.
- W4382141436 title "Electrochemical Stripping Analysis of Selected Heavy Metals at Antimony Trioxide-Modified Carbon Paste Electrode" @default.
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- W4382141436 doi "https://doi.org/10.1016/s1452-3981(23)13331-1" @default.
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