Extraction head of carbon nano-tube solid phase micro-extraction and preparation thereof

A carbon nanotube and extraction head technology, which is applied in the field of analytical chemistry, can solve the problems that the adsorption capacity of substances needs to be improved, the applicable temperature is low, the probe cannot be used, etc., and achieves the effects of wide application range, improved efficiency and simple preparation method.

Inactive Publication Date: 2008-08-13
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the types of commercialized coatings are limited, and the price is expensive, and the applicable temperature is low, so it is very important to prepare a coating with a wider range of application and cheaper
On the other hand, the probes prepared by the prior art generally cannot be used in an environment exceeding 300°C, and the selective adsorption capacity for substances still needs to be improved

Method used

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  • Extraction head of carbon nano-tube solid phase micro-extraction and preparation thereof
  • Extraction head of carbon nano-tube solid phase micro-extraction and preparation thereof
  • Extraction head of carbon nano-tube solid phase micro-extraction and preparation thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Soak the stainless steel fiber in acetone for 2 hours, remove the dirt attached to the outer layer, take it out and dry it for later use; weigh 2 mg of carbon nanotubes into a centrifuge plastic tube, add 40 μL of deionized water and 400 μL of trimethoxysilane, and Place in an ultrasonic oscillator and vibrate for 30 minutes, then add 200 μL of trifluoroacetic acid and a drop of polymethylsiloxane to the above mixture, and continue to vibrate for 6 minutes; soak one end of the above-mentioned treated stainless steel fiber in the above-mentioned sol- Gel solution, and repeatedly pulled until the coating length reached 1cm, thickness reached 80μm; the stainless steel fiber was placed in a desiccator at room temperature for 24 hours, and then placed in the gasification chamber of the gas chromatography at 150 ° C with nitrogen After 30 minutes, the temperature was raised to 180° C. and kept for 30 minutes, then gradually raised to 250° C., kept for 2 hours, taken out and co...

Embodiment 2

[0028] Soak the stainless steel fiber in acetone for 2 hours, remove the dirt attached to the outer layer, take it out and dry it for later use; coat one end of the stainless steel fiber with high-temperature glue, insert it into the carbon nanotube powder, until the coated carbon nanotube coating length reaches 1cm, thickness up to 60μm; place the stainless steel fiber in a desiccator to dry at room temperature for 24 hours, then place it in the vaporization chamber of the gas chromatography at 150°C for 30 minutes with nitrogen, then raise the temperature to 180°C for 30 minutes and then gradually increase the temperature to Keep at 250°C for 2 hours, take it out and cool to room temperature to obtain an extraction tip. The microscopic morphology of the prepared extraction head was characterized by scanning electron microscopy, such as figure 2 As shown in the figure, a large number of carbon nanotubes can be observed on the surface of the extraction head.

Embodiment 3

[0030] Soak the stainless steel fiber in acetone for 2 hours, remove the dirt attached to the outer layer, take it out and dry it for later use; weigh 2 mg of carbon nanotubes into a centrifuge plastic tube, add 40 μL of deionized water and 400 μL of trimethoxysilane, and Place in an ultrasonic oscillator and vibrate for 30 minutes, then add 200 μL of trifluoroacetic acid and a drop of polymethylsiloxane to the above mixture, and continue to vibrate for 6 minutes; soak one end of the above-mentioned treated stainless steel fiber in the above-mentioned sol- Gel solution, and repeatedly pulled, until the coating length reaches 1cm, thickness reaches 60μm, and then coated with high-temperature glue on the part of the stainless steel fiber coated with sol-gel solution, inserted into the carbon nanotube powder, until coated The coated carbon nanotube coating reached 100 μm; the stainless steel fiber was dried in a desiccator at room temperature for 24 hours, and then placed in the g...

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Abstract

The present invention provides a carbon nanotube solid phase microextraction extraction head and method for preparing. The carbon nanotube solid phase microextraction extraction head includes a stainless steel fibre and a surface coating layer coating on one end of the stainless steel fibre, characterized in that the surface coating layer has a carbon nanotube. The application of the carbon nanotube can make the solid phase microextraction extraction head fire stand, have high mechanical strength, and longer service life and high enrichment times; the invention also relates three manufacturing method of the carbon nanotube solid phase microextraction extraction head, a carbon nanotube solid phase microextraction extraction head having selectively strong absorption ability to polar material or non-polar material is prepared by the selectively applied field.

Description

technical field [0001] The invention relates to a solid-phase microextraction head and a preparation method thereof, in particular to a carbon nanotube solid-phase microextraction head and a preparation method thereof, belonging to the field of analytical chemistry. Background technique [0002] Solid phase microextraction (SPME) is an emerging sample processing technology, which uses adsorbents coated on fibers to adsorb, separate and enrich target substances in samples. Because it integrates sampling, extraction, concentration, and sample injection, it is a simple, convenient, time-saving and labor-saving new sample pretreatment technology that does not require solvents. It was rated as one of the 100 most potential technological innovations in the 20th century. , the Journal of the American Chemical Society named it one of the six greatest ideas in the field of analytical chemistry from 1990 to 2000. This technology has been widely used in the fields of environment, food...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30
Inventor 欧阳钢锋江瑞芬朱芳栾天罡
Owner SUN YAT SEN UNIV
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