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Electrochemiluminescence method for detecting catechol

A catechol and electrochemical technology, applied in the field of electrochemiluminescence, can solve the problems of being unsuitable for rapid detection of catechol in tea, time-consuming and labor-intensive detection, etc., and achieve the effect of experimental reagents being environmentally friendly, easy to operate, and high luminous intensity

Active Publication Date: 2019-10-08
CHANGZHOU UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0005] At present, the detection of catechol (catechol) mainly uses gas chromatography, capillary electrophoresis and high performance liquid chromatography, etc. Although these methods have high sensitivity and good stability, the detection is time-consuming and laborious, so they are not suitable for catechol in tea. Rapid detection of tea phenol

Method used

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  • Electrochemiluminescence method for detecting catechol
  • Electrochemiluminescence method for detecting catechol
  • Electrochemiluminescence method for detecting catechol

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Experimental program
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Embodiment

[0026] (1) Preparation of CDs@HKUST-1 / GC modified electrode

[0027] Dissolve citric acid (1.0512 g) and ethylenediamine (340 μL) in a beaker filled with distilled water (10 mL), and stir for 10 min to form a transparent solution, which is then transferred to a polytetrafluoroethylene autoclave (50 mL) at 200 °C Next, react for 5h. After the reaction, cool to room temperature, transfer the liquid in the kettle to a dialysis membrane (1000 MWCO), dialyze in ultrapure water for 24 hours, centrifuge the liquid in the dialysis bag (3500rpm20min), take the supernatant, and freeze-dry it. Obtain dry carbon dot powder.

[0028] Weigh copper nitrate trihydrate (0.4202g), dissolve in distilled water (12mL), weigh 1,3,5-tribenzenetricarboxylic acid (0.2105g) and dissolve in absolute ethanol (12mL), then mix the two, The mixed solution was obtained and stirred by magnetic force for 30 min to form a uniformly mixed HKUST-1 precursor solution.

[0029] Add the prepared carbon dot powder...

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Abstract

The invention provides an electrochemiluminescence method for detecting catechol, and belongs to the field of catechol detection. The operation process includes the following steps of: (1) preparing acopper-based metal organic framework (MOFs) HKUST-1 composite material doped with carbon dots (CDs); (2) preparing a CDs@HKUST-1 / GC chemically modified electrode; (3) forming a traditional three-electrode system by taking the CDs@HKUST-1 / GC modified electrode as a working electrode, taking an Ag / AgCl electrode as a reference electrode, and taking a platinum electrode as an auxiliary electrode, and detecting catechol by using the electrochemiluminescence method. The modified electrode CDs@HKUST-1 / GC has a simple preparation method, has high sensitivity to the detection of catechol, and realizes a wide linear range. According to the scheme of the invention, the detection range is 5.0*10-9mol / L to 2.5*10-5mol / L, and the minimum detection limit is 3.8*10-9mol / L.

Description

technical field [0001] The invention relates to a glassy carbon electrode modified by a copper-based metal-organic framework MOFs (HKUST-1) composite material (CDs@HKUST-1) doped with carbon dots (CDs), which is used to detect the electrochemiluminescence of catechol in tea The method belongs to the field of electrochemiluminescence. Background technique [0002] Metal-organic frameworks (MOFs) are prepared by assembling organic ligands and metal ions in appropriate solvents, and recently, interest in developing MOFs-based materials for electrochemical applications has grown rapidly. Metal-organic frameworks (MOFs) are promising electrochemiluminescence (ECL) active materials because of their high mass transfer capacity and electrocatalytic efficiency. Using metal complexes with good luminescent properties as ligands to replace organic molecules is a prospective approach to endow MOFs with excellent ECL activity. Carbon dots (CDs) are a carbon-based zero-dimensional materi...

Claims

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Application Information

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IPC IPC(8): G01N21/76G01N27/30G01N27/48
CPCG01N21/76G01N27/308G01N27/48
Inventor 周利君单学凌陈智栋
Owner CHANGZHOU UNIV
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