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MIP-SPME (molecularly imprinted polymer-solid phase microextraction) fiber, extraction platform and application

A fiber extraction and extraction technology, which is applied to chemical instruments and methods, other chemical processes, instruments, etc., can solve the problems of quartz fibers that are easy to break, complicated preparation process, and short service life, so as to overcome fragility and make the preparation process simple and fast , the effect of controllable film thickness

Active Publication Date: 2015-11-25
ZHEJIANG ACADEMY OF AGRICULTURE SCIENCES
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  • Abstract
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Problems solved by technology

The technical problem that the present invention aims to solve is: (1) select metal wire as the base material of SPME extraction fiber, solve the defect that the traditional base material quartz fiber is easy to break and have a short service life; (2) use selective MIP as the coating material (3) Select a new coating material immobilization method—electropolymerization method to solve the defects of complicated preparation process and poor reproducibility of other methods

Method used

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  • MIP-SPME (molecularly imprinted polymer-solid phase microextraction) fiber, extraction platform and application

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Embodiment

[0026] MIP-SPME extraction fiber, including a base material and a tebuconazole-molecularly imprinted polymer coating on its surface, the base material is a metal material, and the tebuconazole-molecularly imprinted polymer coating is electropolymerized immobilized on the surface of the base material.

[0027] This study tries to use metal materials as the base material of the SPME extraction head to overcome the shortcomings of traditional quartz fibers such as easy breakage and short service life. At the same time, the coating material is immobilized on the metal surface by electropolymerization. Conductivity, Pt is a better choice in traditional electrode materials, and it is preferable to use Pt wire as the base material of SPME for experimental research on electropolymerization.

[0028] The MIP-SPME extraction fiber was prepared by in-situ electropolymerization-constant potential method. The specific operation was: based on the experimental platform of the Autolab electro...

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Abstract

The invention relates to the fields of drug residue monitoring and analyzing technology and new materials, in particular to an MIP-SPME (molecularly imprinted polymer-solid phase microextraction) fiber for selectively identifying and measuring triazole pesticides, an extraction platform and an application. The MIP-SPME fiber comprises a substrate material and a tebuconazole-MIP coating located on the surface of the substrate material, wherein the substrate material is a metal material, and the tebuconazole-MIP coating is immobilized on the surface of the substrate material in a mode of electrochemical polymerization. The SPME coating prepared with the in-situ electrochemical polymerization method has the characteristics of controllable film thickness and homogeneity of preparation; a metal Pt wire is adopted as the substrate material, so that the defect that a quartz fiber is easy to break is overcome; meanwhile, with the introduction of the molecular imprinting technology, the target selectivity of the SPME is greatly improved.

Description

technical field [0001] The invention relates to the fields of drug residue monitoring, analysis technology and new materials, in particular to a MIP-SPME extraction fiber, extraction platform and application that can selectively identify and measure triazole pesticides. Background technique [0002] As a green sample pretreatment technology, Solid Phase Microextraction (Solid Phase Microextraction, SPME) technology integrates enrichment and purification, and has the advantages of simple operation, no solvent, and easy connection with detection instruments. The core of SPME technology lies in the coating of the extraction fiber. According to the volatility and polarity of the target analyte, the material of the extraction fiber is reasonably selected, which can effectively enrich the target compound and realize fast and efficient sample detection. At present, there are many commercially available SPME coatings. However, there are many types of compounds to be analyzed and the...

Claims

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Application Information

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IPC IPC(8): B01J20/281B01J20/32G01N30/14G01N30/02
Inventor 齐沛沛王新全王祥云徐浩章虎汪志威王强李振
Owner ZHEJIANG ACADEMY OF AGRICULTURE SCIENCES
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