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Extraction coating, solid-phase micro-extraction probe and preparation method and application thereof

An extraction and probe technology, applied in the field of solid-phase microextraction, can solve the problems of the extraction performance of the extraction coating that cannot meet the demand, poor durability, high price, etc., and achieve the effect of low preparation cost and simple and fast preparation steps

Active Publication Date: 2019-06-28
邱俊琅
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the defects and deficiencies such as the extraction performance of the extraction coating in the prior art that cannot meet the demand, the price is expensive, and the durability is poor, and a kind of extraction coating is provided.

Method used

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  • Extraction coating, solid-phase micro-extraction probe and preparation method and application thereof
  • Extraction coating, solid-phase micro-extraction probe and preparation method and application thereof
  • Extraction coating, solid-phase micro-extraction probe and preparation method and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] This embodiment provides a solid phase microextraction probe, such as figure 1 , prepared by the following method.

[0051] S1: Polyacrylonitrile suspension containing cross-linked polyvinylpyrrolidone particles (with a particle size of 5 μm) Configuration: After dissolving polyacrylonitrile in dimethylformamide, add cross-linked polyvinylpyrrolidone particles.

[0052] S2: After cutting the stainless steel fibers into 4cm lengths, soak them in ultrapure water, methanol, and acetone in sequence, and ultrasonicate for 30 minutes, take them out and dry them naturally to obtain the pretreated stainless steel fibers; insert the pretreated stainless steel fibers into Take out the solution prepared in S1 slowly, so that the surface of the stainless steel fiber is evenly coated with a layer of coating with a thickness of 100 μm, volatilize the organic solvent to shape the coating, and scrape off the excess coating to make the coating length 1cm.

[0053] S3: Soak the above coat...

Embodiment 2

[0055] This embodiment provides a solid-phase microextraction probe, which is prepared by the following method.

[0056] S1: Polylactic acid suspension containing cross-linked polyvinylpyrrolidone particles (particle size: 1 μm) Configuration: After dissolving polylactic acid in methylene chloride, add cross-linked polyvinylpyrrolidone particles.

[0057] S2: After cutting the quartz fiber into 2cm length, soak it in ultrapure water, methanol and acetone in order, and ultrasonic for 30 minutes, take it out and dry it naturally to get the pretreated quartz fiber; insert the pretreated quartz fiber into Take out the solution prepared in S1 slowly, so that the surface of the quartz fiber is evenly coated with a layer of coating with a thickness of 20 μm, volatilize the organic solvent to shape the coating, and scrape off the excess coating to make the coating length 0.5 cm.

[0058] S3: Soak the above coating in polynorepinephrine solution to modify the surface with a layer of bi...

Embodiment 3

[0060] This embodiment provides a solid-phase microextraction probe, which is prepared by the following method.

[0061] S1: Polycaprolactone suspension containing crosslinked polyvinylpyrrolidone particles (average particle size: 20 μm) Configuration: After dissolving polycaprolactone in tetrahydrofuran, add crosslinked polyvinylpyrrolidone particles.

[0062] S2: After cutting the glass fibers into 6cm lengths, soak them in ultrapure water, methanol, and acetone in sequence, and ultrasonicate for 30 minutes, take them out and dry them naturally to obtain pretreated glass fibers; insert the pretreated stainless steel fibers into Take out the solution prepared in S1 slowly, so that the surface of the glass fiber is evenly coated with a layer of coating with a thickness of 200 μm, volatilize the organic solvent to shape the coating, and scrape off the excess coating to make the coating length 2cm.

[0063] S3: Soak the above coating in polynorepinephrine solution to modify the ...

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Abstract

The invention relates to an extraction coating, a solid-phase micro-extraction probe, a preparation method and an application thereof. The main body of the extraction coating is a cross-linked polyvinylpyrrolidone material. The cross-linked polyvinylpyrrolidone material is subjected to water absorption expansion activation to achieve high-efficiency extraction of strong polar compounds in a water-containing matrix, and the extraction coating and the solid-phase micro-extraction probe prepared by the cross-linked polyvinylpyrrolidone material have the advantages of good extraction performance,firmness, durability, high sensitivity, good reproducibility and the like. In addition, the preparation method achieves the assembly and coating of the cross-linked polyvinylpyrrolidone particles by using the biocompatible high molecular polymer material, and has the advantages of simple and rapid preparation steps and low preparation cost. The prepared solid-phase micro-extraction probe is firm and durable, and ensures that no excessive other substances are doped in the extraction coating, so that the extraction enrichment effect of the extraction coating can intuitively reflect the extraction enrichment performance of the material.

Description

technical field [0001] The invention belongs to the field of solid-phase microextraction, and in particular relates to an extraction coating, a solid-phase microextraction probe and a preparation method and application thereof. Background technique [0002] Solid-phase microextraction (solid-phase microextraction, SPME) is an extraction and enrichment technology that is easy to operate and does not require a large amount of solvents. It is easy to automate and combine with high-efficiency separation and detection methods such as chromatography and electrophoresis. Due to its advantages of less extraction, less interference to the system, and easy automation, it has been widely used in environmental protection, food testing, drug analysis, and clinical analysis. [0003] Extraction coating is the core of SPME technology. The wide application, high sensitivity and high selectivity of SPME technology depend on the development and preparation of coating materials. It is very di...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/281B01J20/32B01D15/20G01N30/06
Inventor 邱俊琅
Owner 邱俊琅
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