Abstract
In pH 5.0, 0.1 mol l−1 NaAc-HAc buffer solution, 2,4-dinitrophenol and 2,5-dinitrophenol exhibited sensitive and distinguishable voltammetric responses at the glassy carbon electrode modified with poly-aspartic acid. By measuring the reduction peak currents of nitro groups in different positions, dinitrophenol isomers have been determined simultaneously and quantitatively. The linear calibration ranges were 1.1 × 10−6–6.0 × 10−4 mol l−1 for 2,4-dinitrophenol and 7.0 × 10−7–6.0 × 10−4 mol l−1 for 2,5-dinitrophenol, with detection limits of 2.7 × 10−7 and 1.1 × 10−7 mol l-1 respectively. This method has been applied to the detection of dinitrophenols in simulation water sample, and the recovery was from 96.7 to 102.5%.
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Published in Russian in Elektrokhimiya, 2010, Vol. 46, No. 12, pp. 1497–1502.
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Wang, XG., Fan, YJ., Hao, ZX. et al. Voltammetric determination of 2,4-dinitrophenol and 2,5-dinitrophenol using a poly-aspartic acid modified electrode1. Russ J Electrochem 46, 1402–1407 (2010). https://doi.org/10.1134/S1023193510120104
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DOI: https://doi.org/10.1134/S1023193510120104