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- W2046007879 abstract "Abstract The simultaneous voltammetric determination of catechol (CC) and hydroquinone (HQ) has been achieved at a mesoporous carbon CMK-3 modified electrode in phosphate buffer solution (pH 7.0). At the electrode both CC and HQ can cause a pair of quasi-reversible and well-defined redox peaks and their peak potential difference increases. In comparison with multi-walled carbon nanotubes (MWCNTs) and Vulcan XC-72 carbon modified electrodes the CMK-3 modified electrode shows larger peak currents and higher adsorbed amounts for the two dihydroxybenzene isomers. This is related to the higher specific surface area of CMK-3. Under the optimized conditions, the linear concentration ranges for CC and HQ are 5 × 10−7 to 3.5 × 10−5 M and 1 × 10−6 to 3 × 10−5 M, respectively. In the presence of 5 μM isomer, the linear concentration range of CC (or HQ) is 5 × 10−7 to 2.5 × 10−5 M (or 5 × 10−7 to 2.0 × 10−5 M). The sensitivity for CC or HQ is 41 A M−1 cm−2 or 52 A M−1 cm−2, which is close to that without isomer. The detection limits (S/N = 3) for CC and HQ are 1 × 10−7 M after preconcentration on open circuit for 240 s." @default.
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- W2046007879 date "2009-01-01" @default.
- W2046007879 modified "2023-10-02" @default.
- W2046007879 title "High sensitive simultaneous determination of catechol and hydroquinone at mesoporous carbon CMK-3 electrode in comparison with multi-walled carbon nanotubes and Vulcan XC-72 carbon electrodes" @default.
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- W2046007879 doi "https://doi.org/10.1016/j.electacta.2008.08.029" @default.
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