Abstract
A simple sensor based on bare carbon ionic liquid electrode was fabricated for simultaneous determination of dihydroxybenzene isomers in 0.1 mol L−1 phosphate buffer solution (pH 6.0). The oxidation peak potential of hydroquinone was about 0.136 V, catechol was about 0.240 V, and resorcinol 0.632 V by differential pulse voltammetric measurements, which indicated that the dihydroxybenzene isomers could be separated absolutely. The sensor showed wide linear behaviors in the range of 5.0 × 10−7–2.0 × 10−4 mol L−1 for hydroquinone and catechol, 3.5 × 10−6–1.535 × 10−4 mol L−1 for resorcinol, respectively. And the detection limits of the three dihydroxybenzene isomers were 5.0 × 10−8, 2.0 × 10−7, 5.0 × 10−7 mol L−1, respectively (S/N = 3). The proposed method could be applied to the determination of dihydroxybenzene isomers in artificial wastewater and the recovery was from 93.9% to 104.6%.
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Acknowledgments
The financial support from National Outstanding Youth Foundations of China, National Science Foundation of China (50725825), and Special Research Found for the Doctoral Program of Higher Education of China (20060532006) is acknowledged.
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Liu, X., Li, Y., Liu, X. et al. Simple sensor for simultaneous determination of dihydroxybenzene isomers. J Solid State Electrochem 16, 883–889 (2012). https://doi.org/10.1007/s10008-011-1428-2
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DOI: https://doi.org/10.1007/s10008-011-1428-2