A preparation method of a pencil graphite modified electrode and a method for detecting hydroquinone isomers in water

A technology for modifying electrodes and quinone, which is applied in electrolytic coatings, electrochemical variables of materials, coatings, etc., can solve the problems of high reagent cost and complicated preparation methods, achieve high sensitivity and detection limit, simple preparation method, low cost effect
CN111304716BActive Publication Date: 2021-10-08SHAANXI COAL & CHEM TECH INST
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SHAANXI COAL & CHEM TECH INST
Publication Date
2021-10-08

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Abstract

A method for preparing a pencil graphite modified electrode and a method for detecting hydroquinone isomers in a water body, the graphene oxide is ultrasonically dispersed in a perfluorinated resin solution, the graphene oxide suspension is obtained after ultrasonication, and then the graphite pencil electrode is Immerse in the graphene oxide suspension, and perform electrochemical polymerization by cyclic voltammetry to obtain a pencil graphite modified electrode. Using commercially available automatic pencil lead modified graphene as the working electrode can realize the simultaneous quantitative detection of the three quinone isomers, and the detection limit of the three phenolic compounds can reach 10 ‑6 mol / L, wide linear range, and has great application prospects for the detection of actual phenol-containing wastewater. The electrode prepared by the invention can not only detect three kinds of phenolic substances at the same time, but also has the advantages of low cost, high sensitivity and high detection limit.
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Description

technical field

[0001] The invention relates to a preparation method of a pencil graphite modified electrode and a method for detecting hydroquinone isomers in water, belonging to the technical field of rapid detection. Background technique

[0002] The use of electrochemical methods to modify polymers or nanomaterials on electrodes has attracted extensive attention in the past few decades due to their excellent physical and chemical properties. When these polymers were peroxidized electrochemically, they showed better selectivity and sensitivity than before. Generally, the common techniques for preparing peroxidized polymers are cyclic voltammetry with multi-turn scanning or chronoamperometry under suitable potential conditions. However, these techniques have their own limitations, such as: longer duration of the oxidation process and issues such as polymer degradation. Based on these problems, it is necessary to find an alternative electrochemical analysis technique that...

Claims

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