Fabrication of Graphene‐cuprous Oxide Hybrid Paste Electrodes for Capillary Electrophoretic Measurement of Polyhydroxy Compounds

Li, Farui; Jiang, Kun‐Ming; Wu, Qianyu; Li, Zhenjie; Chen, Gang

doi:10.1002/elan.202200183

Electroanalysis

2022

DOI: 10.1002/elan.202200183

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Fabrication of Graphene‐cuprous Oxide Hybrid Paste Electrodes for Capillary Electrophoretic Measurement of Polyhydroxy Compounds

Farui Li

Kun‐Ming Jiang

Qianyu Wu

et al.

Abstract: An alkaline mixture containing copper(II) spices, graphene oxide and glucose was heated by far infrared radiations to synthesize graphene-cuprous oxide hybrid. The hybrid was blended with mineral oil and packed into tubes to fabricate paste electrodes. The electrodes were coupled with capillary electrophoresis for the detection of polyhydroxy compounds. The sensitivities of them on the hybrid electrodes were significantly enhanced by taking advantages of graphene and cuprous oxide. The contents of polyhydroxy … Show more

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Cited by 2 publications

References 37 publications

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Simultaneous Determination of Nicotine and Phenolic Compounds in Tobacco by Capillary Electrophoresis with Pipette Tip Electrodes

Chen

Liu

et al. 2022

CAC

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Aim: The aim of this work is to fabricate pipette tip electrodes for the capillary electrophoretic determination of nicotine and phenolic compounds in tobacco. Background: The content of nicotine affects not only the quality of tobacco products but also the health of smokers. Phenolic compounds are important flavor precursors in tobacco. The quantity of phenolic compounds is one of the most important evaluation indicators of tobacco quality. It is of high importance to determine nicotine and phenolic compounds in tobacco for quality control and the health of smokers. Objective: A method based on capillary electrophoresis and amperometric detection was developed for the simultaneous determination of nicotine, rutin, chlorogenic acid, quercetin, ferulic acid, gallic acid and protocatechuic acid in tobacco leaves. Pipette electrodes were designed and fabricated for the amperometric detection of them. Method: Nicotine, rutin, chlorogenic acid, quercetin, ferulic acid, gallic acid and protocatechuic acid were determined by capillary electrophoresis in combination with the detection electrodes that were fabricated by packing the composite of carbon nanotube and epoxy in pipette tips. Results: Detection potentials, the acidity and concentrations of background electrolyte, separation voltages and injection times were optimized. At a high voltage of 12 kV, separation of the seven analytes could be achieved in less than 11 min in a piece of 40 cm long fused silica capillary with a background electrolyte of 50 mM borate buffer (9.2). Linearity was observed between the peak currents and the concentrations with the limits of detection ranging from 0.1 to 0.2 µM for the seven analytes at the pipette electrodes. The method was applied in the simultaneous determination of nicotine and phenolic compounds with satisfactory assay results. Conclusions: The pipette tip electrodes were successfully coupled with capillary electrophoresis for tobacco analysis. The CE-AD method provides not only a simple approach for the quality control of tobacco and its preparations but also an alternative technique for the constituent and fingerprint investigation of other plants.

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Simultaneous Determination of Nicotine and Phenolic Compounds in Tobacco by Capillary Electrophoresis with Pipette Tip Electrodes

Chen

Liu

et al. 2022

CAC

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Advances in the Applications of Capillary Electrophoresis to Tobacco Analysis

Chen

et al. 2023

CAC

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Background: Capillary electrophoresis (CE) has found a wide range of applications because of its high separation efficiency, low expense, short analysis time and minimal sample volume requirement. The tobacco quality depends on the nature and quantity of numerous substances. CE has been applied in the constituent analysis of tobacco and tobacco products for quality control and tobacco research. Methods: The advances in the applications of CE to tobacco analysis are reviewed. The main subjects cover the separation modes of CE, the detection techniques of CE, sample preparations and the applications of CE in the measurements of various constituents in tobacco samples. In addition, the CE-based metabonomic investigation of tobacco is also introduced. Results: Capillary zone electrophoresis, micellar electrokinetic chromatography, capillary isotachophoresis, capillary gel electrophoresis, capillary electrochromatography and non-aqueous CE have been applied in the determination of a variety of constituents in tobacco and tobacco products. The assayed substances include alkaloids, amines, saccharides, organic acids, inorganic ions, phenols, phenolic acids, flavonoids, amino acids, peptides, proteins, hormones, agricultural chemicals, etc. Conclusion: This review demonstrates that CE is a promising analytical technique in the field of tobacco analysis. It is anticipated that CE will find more and more applications in tobacco investigations.

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Fabrication of Graphene‐cuprous Oxide Hybrid Paste Electrodes for Capillary Electrophoretic Measurement of Polyhydroxy Compounds

Cited by 2 publications

References 37 publications

Simultaneous Determination of Nicotine and Phenolic Compounds in Tobacco by Capillary Electrophoresis with Pipette Tip Electrodes

Simultaneous Determination of Nicotine and Phenolic Compounds in Tobacco by Capillary Electrophoresis with Pipette Tip Electrodes

Advances in the Applications of Capillary Electrophoresis to Tobacco Analysis

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