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Method for preparing carbon nano particle extraction coating solid phase micro-extraction fiber

A carbon nanoparticle and fiber extraction technology, applied in chemical instruments and methods, other chemical processes, etc., can solve the problems of poor extraction capacity, complex preparation methods, and low enrichment multiples, and achieve strong adsorption capacity, large specific surface area, The effect of high extraction capacity

Inactive Publication Date: 2012-06-13
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These preparation methods have their own advantages and disadvantages: the physical coating method is easy to operate and easy to master, but the stability of the prepared extraction coating is poor, and the carbon nanomaterials and the carrier are only combined by physical adsorption, the binding force is weak, and the service life is short. ; Sol-gel method, the physical strength of the prepared extraction coating is high, but the specific surface area of ​​carbon nanomaterials is greatly reduced, the enrichment factor is low, and the extraction ability is poor; chemical bonding method, there is a chemical bond between the obtained extraction coating and the substrate , high chemical stability, good extraction performance, but the preparation method is complicated and the cost is high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Embodiment 1: Preparation of carbon nanoparticle-coated stainless steel wire solid-phase microextraction fiber

[0024] A. Pretreatment of fiber matrix surface

[0025] Grind the surface of the stainless steel wire with fine sandpaper to remove surface impurities, ultrasonically clean it with water, soak it in 1mol / L nitric acid at room temperature for 6 hours, take it out and clean it ultrasonically with water.

[0026] B. Preparation of Carbon Nanoparticle Extraction Coating

[0027] The pretreated stainless steel wire was placed in a stable ethanol flame at a height 0.5 times the total height of the flame, and the carbon nanoparticle deposition time was 5 minutes to obtain carbon nanoparticle extraction-coated stainless steel wire solid phase microextraction fiber.

Embodiment 2

[0028] Example 2: Preparation of carbon nanoparticle-coated quartz solid-phase microextraction fiber

[0029] A. Pretreatment of fiber matrix surface

[0030] Burn the polyimide coating on the surface of the quartz fiber with the flame of an alcohol lamp and remove it by dissolving acetone. After ultrasonic cleaning with water, put it in 2mol / L sodium hydroxide solution and soak it at 40°C for 1 hour, then take it out and clean it ultrasonically with water.

[0031] B. Preparation of Carbon Nanoparticle Extraction Coating

[0032] The pretreated quartz fiber was placed in a stable acetone flame at a height 0.4 times the total height of the flame, and the carbon nanoparticle deposition time was 10 minutes to obtain a carbon nanoparticle extraction-coated quartz solid-phase microextraction fiber.

Embodiment 3

[0033] Example 3: Preparation of carbon nanoparticle-coated titanium wire solid-phase microextraction fiber

[0034] A. Pretreatment of fiber matrix surface

[0035] Grind the surface of the titanium wire with fine sandpaper to remove surface impurities, ultrasonically clean it with water, soak it in 2mol / L hydrochloric acid at room temperature for 0.5 hours, take it out and ultrasonically clean it with water.

[0036] B. Preparation of Carbon Nanoparticle Extraction Coating

[0037] The pretreated titanium wire was placed in a stable ethanol flame at a height of 0.25 times the total height of the flame, and the carbon nanoparticle deposition time was 30 minutes to obtain carbon nanoparticle extraction-coated titanium wire solid-phase microextraction fibers.

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PUM

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Abstract

The invention discloses a method for preparing carbon nano particle extraction coating solid phase micro-extraction fiber. The method is characterized in that a carbon coating is produced on the surface of fiber matrix by employing a flame method, the carbon nano particles and appropriate coating thickness can be obtained by controlling the preparation condition, and the carbon nano particle extraction coating solid phase micro-extraction fiber can be obtained. The prepared extraction coating possesses the advantages of high stability, strong enrichment capability and the like, the obtained solid phase micro-extraction fiber can be used for food analysis, environment analysis, biological analysis and the like.

Description

technical field [0001] The invention relates to a preparation technology of a solid-phase micro-extraction fiber using carbon nanometer material as an extraction coating. Background technique [0002] Solid-phase microextraction technology is an efficient and rapid separation and enrichment technology that appeared at the end of the 20th century. It has the advantages of strong enrichment ability, fast separation and analysis speed, simple operation, and easy connection with instruments, so it is used in food, Analysis of environmental, pharmaceutical and biochemical samples. The solid phase microextraction fiber is the core of the technology, which determines the quality of the analysis results, and its extraction performance depends on the extraction coating. Carbon nanomaterial is a very good adsorption material, not only has a large specific surface area, strong adsorption capacity, but also has high chemical stability, so carbon nanotubes, graphene, etc. have attracted...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30
Inventor 孙敏罗川南
Owner UNIV OF JINAN
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