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- W2740128901 abstract "An amperometric biosensor for the indirect determination of mercury was developed by inhibition of glucose oxidase immobilized on a carbon paste electrode bulk modified with manganese dioxide 5% (m:m). Optimum conditions for biosensor were found as: operating potential 0.46 V vs Ag/AgCl, enzyme load 0.56 U/mm2 electrode surface, supporting electrolyte: 0.1 M citrate phosphate buffer (pH 7). The current response of the biosensor in hydrodynamic amperometry was linearity dependent on the concentration within 2.0 – 32.5 mg/L Hg (II) with a detection limit of 0.5 mg/L. The enzymatic activity could be fully recovered by exposure of the electrode to a solution of EDTA (0.1 M) for 2 minutes. Minor interferences were caused by Cr3+ and Zn2+. Analytical results of spiked water sample showed a good correlation with determinations by atomic absorption spectrometry where the difference is not statistically significant at 95% confidence level. The sensor yielded a stable and reproducible response more than 2 weeks when stored dry at 4 ๐C." @default.
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- W2740128901 date "2012-02-01" @default.
- W2740128901 modified "2023-10-10" @default.
- W2740128901 title "Indirect Determination of Mercury by Inhibition of Glucose Oxidase Immobilized on a Carbon Paste Electrode" @default.
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- W2740128901 doi "https://doi.org/10.1016/s1452-3981(23)13390-6" @default.
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