Metallic-organic gel matrix solid-phase microextraction head with multiple levels of hole channels and preparation method thereof

A technology of organic gel and matrix solid phase, applied in chemical instruments and methods, other chemical processes, ion exchange, etc., can solve problems such as limited application range, poor selectivity, and high price, and achieve the effect of increasing enrichment capacity

Inactive Publication Date: 2013-05-22
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Commercial extraction coatings have limited types, poor selectivity, and are expensive, which greatly limits its application range. Therefore, many researchers are committed to the research of new coating materials.

Method used

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  • Metallic-organic gel matrix solid-phase microextraction head with multiple levels of hole channels and preparation method thereof
  • Metallic-organic gel matrix solid-phase microextraction head with multiple levels of hole channels and preparation method thereof
  • Metallic-organic gel matrix solid-phase microextraction head with multiple levels of hole channels and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Weigh 0.6750 g of aluminum nitrate hexahydrate, weigh 0.1952 g of terephthalic acid, dissolve in 4 mL of ethanol, place in a 10 mL airtight bottle or a 15 mL reaction kettle, and place the airtight bottle or reaction kettle in an oven or After heating to 80°C in a drying oven for 4 hours, a metal-organic gel was obtained. The obtained product is further placed in an oven or a dry box for aging at 80° C. for 2 days. The resulting gel is wrapped with filter paper, put into a Soxhlet extractor, put the metal-organic gel wrapped by filter paper into a supercritical kettle, and carry out supercritical carbon dioxide drying. The drying time is 24 hours, and the aluminum nitrate Calculate, product yield is 90%.

[0036] Such as figure 1 The low-temperature nitrogen adsorption-desorption isotherm of the product obtained in Example 1 is given. X-axis is P / P 0 , the Y axis is the volume (cm 3 / g). The pretreatment condition for adsorption was vacuum drying at 80°C for 16 ho...

Embodiment 2

[0047] Weigh 0.3375 g of aluminum nitrate hexahydrate, weigh 0.1260 g of trimesic acid, dissolve in 12 mL of ethanol, place in a 10 mL airtight bottle or a 15 mL reaction kettle, and place the airtight bottle or reaction kettle in an oven or After heating to 80°C in a drying oven for 4 hours, a metal-organic gel was obtained. The obtained product was further aged in an oven at 80° C. for 2 days. The resulting gel is wrapped with filter paper, put into a Soxhlet extractor, put the metal-organic gel wrapped by filter paper into a supercritical kettle, and carry out supercritical carbon dioxide drying. The drying time is 24 hours, and the aluminum nitrate Calculate, product yield is 90%. An aerogel is thus obtained.

[0048] Figure 5 The low-temperature nitrogen adsorption-desorption isotherms of the airgel products obtained in Examples 2-4 are given. X-axis is P / P 0 , the Y axis is the volume (cm 3 / g). The pretreatment condition for adsorption was vacuum drying at 80°C ...

Embodiment 3

[0063] Weigh 0.3375 g of aluminum nitrate hexahydrate, weigh 0.1260 g of trimesic acid, dissolve in 8 mL of ethanol, place in a 10 mL airtight bottle or a 15 mL reactor, and place the airtight bottle or reactor in an oven After heating to 80°C for 4 hours, a metal-organic gel was obtained. The obtained product is further placed in an oven or a dry box for aging at 80° C. for 2 days. The resulting gel is wrapped with filter paper, put into a Soxhlet extractor, put the metal-organic gel wrapped by filter paper into a supercritical kettle, and carry out supercritical carbon dioxide drying. The drying time is 24 hours, and the aluminum nitrate Calculate, product yield is 90%. An aerogel is thus obtained.

[0064] Figure 5 The low-temperature nitrogen adsorption-desorption isotherms of the airgel products obtained in Examples 2-4 are given. X-axis is P / P 0 , the Y axis is the volume (cm 3 / g). The pretreatment condition for adsorption was vacuum drying at 80°C for 16 hours....

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Abstract

The invention discloses a metallic-organic gel matrix solid-phase microextraction head with multiple levels of hole channels. The solid-phase microextraction head is characterized by being composed of a steel wire and a solid-phase microextraction coating layer wrapped on the surface of the steel wire, wherein the solid-phase microextraction coating layer comprises the metallic-organic gel with the multiple levels of hole channels. The metallic-organic gel with the multiple levels of hole channels is used as the coating material of the solid-phase microextraction head, so that the enriching capability of the solid-phase microextraction head for gathering polar materials is enhanced by means of the multi-hole structure, the adjustable hole diameter and the modifiable hole surfaces of the metallic-organic gel.

Description

technical field [0001] The invention relates to a metal-organic gel matrix solid-phase microextraction head with multi-stage channels and a preparation method thereof. Background technique [0002] Solid phase microextraction (SPME) is a novel sample pretreatment and enrichment technology that emerged in the 1990s. It was first developed and studied by the research group of Professor Pawliszyn at the University of Waterloo in Canada in 1989. Solvent-based option extraction. [0003] Solid-phase microextraction technology can be used for the analysis of almost all kinds of volatile or semi-volatile substances in gas, liquid, biological, solid and other samples. The biggest feature of SPME is that it integrates sampling, extraction, enrichment, and sample injection, so it is easy to operate, does not require solvents, has fast extraction speed, low operating cost, does not pollute the environment, is easy to realize automation, and is easy to combine with high-efficiency chro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/282B01J20/281B01J20/32B01D15/08
Inventor 张建勇李垒郑娟陈六平欧阳刚锋苏成勇
Owner SUN YAT SEN UNIV
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