An electrochemical sensor for rapid and selective detection of quercetin and its preparation method

A quercetin and sensor technology, which is applied in the field of electrochemical sensors for rapid and selective detection of quercetin and the field of preparation thereof, can solve the problem that the electrochemical detection of quercetin is rarely studied and the like, and achieves low preparation cost and stability. Good, selective effect

Inactive Publication Date: 2021-04-16
JIANGXI SCI & TECH NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the electrochemical detection of quercetin has rarely been studied.

Method used

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  • An electrochemical sensor for rapid and selective detection of quercetin and its preparation method
  • An electrochemical sensor for rapid and selective detection of quercetin and its preparation method
  • An electrochemical sensor for rapid and selective detection of quercetin and its preparation method

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Embodiment 1

[0028] A preparation method of an electrochemical sensor for fast and selective detection of quercetin, comprising the following steps:

[0029] Step 1: Preparation of Composite Materials

[0030] Place the glassy carbon electrode in 5 mL of acetonitrile solution containing 0.0808 g of anhydrous lithium perchlorate and 5 μL of EDOT for potentiostatic polymerization for 15 s, and the voltage window is 0-1.35 v;

[0031] Step 2: Preparation of Composite Electrode

[0032] Take 5 μL of 1mg / ml WS 2 The water dispersion was drop-coated on the surface of the glassy carbon electrode, and then dried at 60 °C to obtain WS 2 / PEDOT composite electrode.

[0033] For the WS prepared above 2 For the electrochemical response of quercetin / PEDOT composite electrode, see figure 1 , in the Britton-Robinson (Britton-Robinson) solution containing 10 μmol / L quercetin 0.2 mol / L, the composite electrode is 0.38 to quercetin v There is an irreversible oxidation peak, indicating that the composi...

Embodiment 2

[0040] A preparation method of an electrochemical sensor for fast and selective detection of quercetin, comprising the following steps:

[0041] Step 1: Preparation of Composite Materials

[0042]The glassy carbon electrode was placed in the acetonitrile solution of anhydrous lithium perchlorate and EDOT for potentiostatic polymerization for 10 s, and the voltage window was 0-1.35 v; the mass ratio of anhydrous lithium perchlorate and EDOT was 12:1; acetonitrile and EDOT The volume ratio is 500:1;

[0043] Step 2: Preparation of Composite Electrode

[0044] Take 1mg / ml WS 2 The water dispersion liquid is drop-coated on the surface of the polymerized glassy carbon electrode, WS 2 The dosage is 3 μL, after drying at 50℃, WS 2 / PEDOT composite electrode.

Embodiment 3

[0046] A preparation method of an electrochemical sensor for fast and selective detection of quercetin, comprising the following steps:

[0047] Step 1: Preparation of Composite Materials

[0048] The glassy carbon electrode was placed in the acetonitrile solution of anhydrous lithium perchlorate and EDOT for potentiostatic polymerization for 20 s, and the voltage window was 0-1.35 v; the mass ratio of anhydrous lithium perchlorate and EDOT was 13:1; acetonitrile and EDOT The volume ratio is 500:1;

[0049] Step 2: Preparation of Composite Electrode

[0050] Take 1mg / ml WS 2 The water dispersion liquid is drop-coated on the surface of the polymerized glassy carbon electrode, WS 2 The dosage is 10 μL, and after drying at 70°C, WS 2 / PEDOT composite electrode.

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Abstract

An electrochemical sensor for fast and selective detection of quercetin and a preparation method thereof belong to the technical field of electrochemical sensors. Polymerize PEDOT on a glassy carbon electrode by electrodeposition, and then drop-coat 5 μL WS on the polymerized material. 2 Aqueous dispersion liquid, after drying, can prepare the composite electrode of tungsten disulfide and PEDOT two kinds of materials, in the solution of Britton Robinson (Britton Robinson) (0.2mol / L) as supporting electrolyte Quercetin was detected electrochemically, and the composite electrode showed good electrocatalytic activity for quercetin. The electrode can realize efficient, sensitive and selective detection of quercetin, and can be successfully applied to the determination of quercetin content in lotus leaves. The electrochemical sensor prepared by the invention has the advantages of easy preparation of electrode materials, low cost, simple operation, fast and efficient, high sensitivity and the like.

Description

technical field [0001] The invention belongs to the field of electrochemical sensors, and relates to an electrochemical sensor for fast and selective detection of quercetin and a preparation method thereof. Background technique [0002] Quercetin is an antioxidant. There are double bonds between the 2 and 3 positions in the molecule, and there are 2 hydroxyl groups at the 37 and 47 positions, so it can be used as a free radical acceptor produced in the oxidation process of metal chelation or oil. In terms of anti-cancer, quercetin can significantly inhibit the effect of cancer-promoting agents, inhibit the growth of malignant cells in vitro, and inhibit the DNA, RNA and protein synthesis of Ehrlich ascites cancer cells. However, excess quercetin can induce inflammation, joint pain and stiffness. Up to now, a variety of quercetin determination methods have been established, and the widely used methods are mainly chromatography, such as thin layer chromatography, gas chromato...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/30G01N27/48
Inventor 段学民李莹莹文阳平徐景坤周卫强
Owner JIANGXI SCI & TECH NORMAL UNIV
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