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Simultaneous determination of dihydroxybenzene isomers utilizing a thiadiazole film electrode

Chinese Chemical Letters 2014年第2期25卷 370-374页

作者： Chang-Zhi Zhao Jun-Yu Liang Xiao-Lei Gu Hui Liu College of Chemistry & Molecular Engineering Qingdao University of Science & Technology

The present study reports a sensitive electro-analytical method for the simultaneous determination of dihydroxybenzene isomers by using a thiadiazole film electrode, which was readily prepared by electropolymerization of 2,5-dimercapto-1,3,4-thiadiazole on a glassy carbon electrode with cyclic voltammetry. The functionalized electrode has a distinguishable and sensitive response to dihydroxybenzene isomers. Under the optimized conditions, the linear stripping peak currents showed good linear relationships with hydroquinone, catechol and resorcinol at concentration ranges 0.50-120, 0.50-110 and 1.00-110 μmol/L, and the detection limits are 0.1, 0.1 and 0.3 μmol/L, respectively. The proposed method is applicable to the simultaneous determination of dihydroxybenzene isomers in real samples with the relative standard deviations of less than 5.7% and the recovery rates of 95.6%-106%. The constructed electrode is characterized by simple preparation, good selectivity, and high sensitivity advantages.

关键词： Electrochemical analysis dihydroxybenzene isomers 2,5-Dimercapto-1,3,4-thiadiazole Elect ropolymerization

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夹心型MOF在还原氧化石墨烯表面的原位合成并用于苯二酚同分异构体的灵敏检测（英文）

夹心型MOF在还原氧化石墨烯表面的原位合成并用于苯二酚同分异构...

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河南省化学会2018年学术年会

作者：乔建通冶保献郑州大学化学与分子工程学院

Sandwich MOF/reduced graphene oxide(denoted as MIL@Pt@MIL-rGO) as an electrochemically active sensing nanomaterial has been successfully prepared by an in-situ synthesis method. The surface morphology and structure of MIL@Pt@MIL-rGO composite were characterized by scanning electron microscopy(SEM), transmission electron microscope(TEM), Fourier transform infrared spectroscopy(FT-IR), X-ray diffraction(XRD), etc. Based on MIL@Pt@MIL-rGO, a novel electrochemical sensor was constructed and successfully used for the simultaneous and sensitive detection of hydroquinone(HQ), catechol(CT) and resorcinol(RS) in actual water body without any pretreatment. Under the optimal conditions, compared to other reported sensors, this sensor showed a wider linear response in the concentration range of 0.05–200 μM, 0.1–160 μM and 0.4–300 μM with a Lower detection limit of 0.015 μM, 0.032 μM and 0.133 μM(S/N = 3) for HQ, CT and RS by DPV, respectively. Besides, the MIL@Pt@MIL-rGO sensor showed an excellent anti-interference, stability, and reproducibility, and satisfactory recovery when detecting isomers in river and lake water.

关键词： dihydroxybenzene isomers Sandwich MOF In-Situ synthesis DPV Electrochemical sensor

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