A facile and fast electrochemical method for the simultaneous determination of <Emphasis Type="Italic">o</Emphasis>-dihydroxybenzene and <Emphasis Type="Italic">p</Emphasis>-dihydroxybenzene using a surfactant |
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Authors: | Wang-Zhuan Liu Xiao-Gang Wang Qing-Sheng Wu Ya-Ping Ding |
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Institution: | (1) Department of Chemistry, Tongji University, Shanghai, 200092, PR China;(2) Department of Chemistry, Shanghai University, Shanghai, 200444, PR China |
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Abstract: | A fast and convenient analytical technique has been suggested to detect dihydroxybenzene (DHB) isomers directly and simultaneously.
In 0.1 M HAc-NaAc buffer solution (pH 5.6), the reduction peaks of p -DHB and o -DHB were partly separated by differential pulse voltammetry at the glassy carbon electrode. By adding a surfactant (cetyl
pyridinium chloride) to enhance the detection sensitivity and using a semi-derivative technique to improve the separation,
p-DHB and o-DHB were detected simultaneously. The linear calibration ranges were 1.2 × 10−6 to 1.0 × 10−4 M for p -DHB and 8.2 × 10−7 to 1.0 × 10−4 M for o -DHB, with detection limits of 3.6 × 10−7 and 2.4 × 10−7 M, respectively. The proposed method has been applied to the direct determination of DHB isomers in water sample, and the
results were excellent.
The text was submitted by the authors in English. |
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