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Sensing detector pen for qualitative detection of propylene chorohydrin

A qualitative detection, chloropropanol technology, applied in the field of technological innovation, can solve the problems of high detection cost, complexity and high operational requirements

Inactive Publication Date: 2017-12-05
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the detection of harmful substances in food, the commonly used detection methods include gas chromatography, high performance liquid chromatography, ultraviolet spectroscopic analysis, photometric analysis, etc. These methods generally require high and complicated operations, require large-scale equipment and detection costs Expensive, harsh conditions, difficult to gain general popularity

Method used

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  • Sensing detector pen for qualitative detection of propylene chorohydrin
  • Sensing detector pen for qualitative detection of propylene chorohydrin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Example 1: Synthesis of photocrosslinkable amphiphilic random copolymer and its self-assembled micellization to prepare molecularly imprinted micelles

[0016] Through monomers containing carboxyl groups, tertiary amino groups, ester groups, isocyanate groups, hydroxyl groups, etc., which have certain weak interaction units and environmental responsive units, and monomers containing double bond photocrosslinking groups through free radicals Copolymerize into a functional amphiphilic random copolymer Poly(DMA-co-HEA-co-EHA-co-St).

[0017] Using tetrahydrofuran as a solvent and petroleum ether as a precipitating agent, the resulting solution was added to an appropriate amount of petroleum ether, and precipitated twice in petroleum ether. The crude product was then dialyzed against water. A white flocculent amphiphilic photocrosslinkable random polymer was obtained by freeze-drying.

[0018] Dissolve the amphiphilic random copolymer and benzophenone (photoinitiator) in ...

Embodiment 2

[0019] Example 2: Preparation of Molecularly Imprinted Electrochemical Sensor Based on ITO / PET Flexible Conductive Electrode

[0020] Wash the ITO / PET flexible conductive electrode three times in an appropriate amount of acetone, ethanol, and water, respectively, and use a multimeter to judge the conductive layer. Place the conductive flexible electrode with the electrical layer upward, and dry it for later use. Using the chloropropanol molecularly imprinted micellar solution as the electrodeposition solution, the molecularly imprinted polymer micellar film was obtained by the three-electrode system electrophoretic deposition method and the ITO / PET flexible electrode as the working electrode in the deposition solution for 5 minutes. UV light stabilized the film structure. Elute chloropropanol with 4mol / L HNO3 methanol: water (2:1, v / v) solution, dry and store.

Embodiment 3

[0021] Embodiment 3: the preparation method of a kind of chloropropanol sensing probe pen

[0022] Using the above molecular imprinted sensor based on ITO / PET flexible conductive electrodes as a component, a simple resistance-current response amplification circuit is designed, and simple packaging and protection are carried out to obtain a chloropropanol sensing probe.

[0023] The main issues considered when designing the circuit: (1) The circuit should have the function of amplifying electrical signals; (2) The circuit can be adjusted: the circuit program corresponds to the concentration in the linear range of sensor detection, and the detection concentration can be set; (3) The circuit should be small and exquisite Simple.

[0024] Embodiment 3: A kind of detection method of chloropropanol sensing detection pen

[0025] When a chloropropanol sensing probe pen is placed in the test solution, due to the specific recognition of the molecular recognition membrane, the specific...

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Abstract

The invention provides a preparation method of a molecular recognition sensor based on a cheap electrode, and the sensor is designed into a practical detector pen. By combination of a chemical solution assembly method, molecular recognition and electrophoretic deposition technology, propylene chorohydrin is used as template molecules, an amphiphilic random copolymer and propylene chorohydrin molecules are self-assembled in a selective solution to obtain a molecular recognition functional colloid, a PET flexible conducting electrode is used as a working electrode and placed into the above prepared molecular recognition colloid solution, a film is formed through deposition on the surface of a conductive substrate through an electrophoretic deposition technology, cross-linking is conducted through ultraviolet radiation, propylene chorohydrin is removed through elution to obtain a molecular recognition sensing electrode, and with cooperation of a simple circuit, the molecular recognition sensing electrode is designed into a portable detector pen having response to specific propylene chorohydrin concentration. The detector pen is used for qualitative semiquantitative detection of existence of propylene chorohydrin. The molecular recognition detector pen has good portability.

Description

technical field [0001] The invention relates to a sensor detection pen for qualitative detection of chloropropanol, belongs to the technical field of combining functional polymer materials and chemical sensor devices, and is a technical innovation. Background technique [0002] Molecular recognition refers to the ability of two or more molecules to interact through non-covalent bonds to achieve specificity or specificity. In addition to direct contact with each other such as hydrogen bonds, ionic bonds, hydrophilicity and hydrophobicity, and van der Waals forces, this interaction also includes a series of effects mediated by water in solution. The molecular recognition process reflects a good molecular complementarity. To achieve molecular recognition, the following requirements must be met: the binding sites of the two molecules are structurally complementary; the two binding sites have corresponding groups that can generate enough force to bind the two molecules together....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/30
CPCG01N27/30
Inventor 赵鑫犇季磊肖恬英梁雪黄雪雯赵伟刘晓亚
Owner JIANGNAN UNIV