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Preparation method of solid-phase microextraction head with multi-layer porous activated carbon film coating

A solid-phase micro-extraction head, activated carbon technology, applied in chemical instruments and methods, other chemical processes, instruments, etc., can solve the problems of requiring a cold trap device, time-consuming, complicated operation, etc., and achieves short analysis time, porosity The effect of high rate and strong enrichment ability

Inactive Publication Date: 2020-06-05
晋江瑞碧科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method is time-consuming, requires a cold trap device, and is complicated to operate

Method used

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  • Preparation method of solid-phase microextraction head with multi-layer porous activated carbon film coating

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Comparison scheme
Effect test

Embodiment 1

[0026] The preparation method of a kind of solid-phase microextraction head of multi-layer porous activated carbon membrane coating that this embodiment relates to specifically comprises the following steps:

[0027] 1. Dissolve 0.05g polyacrylonitrile in 9.95g ternary mixed solvent, in which N,N-dimethylformamide:tetrahydrofuran:dichloromethane=1:1:2 in the ternary solvent, stir magnetically for 3h at room temperature , prepared into a polyacrylonitrile solution with a mass concentration of 0.5%.

[0028] 2. Corrode the stainless steel wire in a hydrofluoric acid solution with a mass fraction of 2% for 30 minutes, wash it with distilled water until neutral, and dry it to obtain a surface-modified stainless steel wire. Insert the surface-modified stainless steel wire into the above solution, soak in the solution for 5 minutes, then quickly take it out and put it into a closed container with a temperature and humidity of 20°C and 75% R.H. respectively, and keep it for 10 minute...

Embodiment 2

[0040] The preparation method of a kind of solid-phase microextraction head of multi-layer porous activated carbon membrane coating that this embodiment relates to specifically comprises the following steps:

[0041] 1. Dissolve 0.1g polyacrylonitrile in 9.9g ternary mixed solvent, in which N,N-dimethylformamide:tetrahydrofuran:dichloromethane=1:2:2 in the ternary solvent, stir magnetically for 3h at room temperature , prepared into a polyacrylonitrile solution with a mass concentration of 1%.

[0042] 2. Corrode the stainless steel wire in a hydrofluoric acid solution with a mass fraction of 2% for 30 minutes, wash it with distilled water until neutral, and dry it to obtain a surface-modified stainless steel wire. Insert the surface-modified stainless steel wire into the above solution, soak in the solution for 5 minutes, then quickly take it out and put it into a closed container with a temperature and humidity of 20°C and 75% R.H. respectively, and keep it for 10 minutes. ...

Embodiment 3

[0054] The preparation method of a kind of solid-phase microextraction head of multi-layer porous activated carbon membrane coating that this embodiment relates to specifically comprises the following steps:

[0055] 1. Dissolve 0.1g polyacrylonitrile in 9.9g ternary mixed solvent, in which N,N-dimethylformamide:tetrahydrofuran:dichloromethane=1:3:3 in the ternary solvent, stir magnetically for 3h at room temperature , prepared into a polyacrylonitrile solution with a mass concentration of 1%.

[0056] 2. Corrode the stainless steel wire in a hydrofluoric acid solution with a mass fraction of 2% for 30 minutes, wash it with distilled water until neutral, and dry it to obtain a surface-modified stainless steel wire. Insert the surface-modified stainless steel wire into the above solution, soak in the solution for 5 minutes, then quickly take it out and put it into a closed container with a temperature and humidity of 30°C and 83% R.H. respectively, and keep it for 10 minutes. ...

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Abstract

The invention discloses a preparation method of an SPME (solid-phase microextraction) head with a porous activated carbon membrane coating. Modified stainless steel wires are selected as a carrier, polyacrylonitrile is dissolved in a ternary mixed solvent, and the surfaces of the stainless steel wires are coated with polyacrylonitrile porous membranes with a steam assistance method; the stainlesssteel wires with the polyacrylonitrile coating membranes are soaked in an acetic acid solution and a potassium permanganate solution respectively; finally, the stainless steel wires with the polyacrylonitrile coating membranes are preoxidized and carbonized, so that the polyacrylonitrile porous membranes are converted into porous activated carbon membranes, that is, the surfaces of the stainless steel wires are coated with the porous activated carbon membranes in situ, and the SPME heat with the porous activated carbon membrane coating is obtained. The SPME head has the characteristics of highmechanical strength, excellent adsorption performance, good reproducibility, long service life and the like and can be used for trace component enrichment analysis of actual samples of food, environment, medicines, biochemical products and the like.

Description

technical field [0001] The invention relates to a preparation method of a solid-phase micro-extraction head coated with a multi-layer porous activated carbon film, and belongs to the technical field of the solid-phase micro-extraction head. Background technique [0002] Volatile organic compounds (VOCs) in the air are a class of organic pollutants with complex composition and various forms that are ubiquitous in the air. Exceeding the standard of VOCs can easily cause dizziness, nausea, and heartburn, and seriously cause various diseases, which pose potential hazards to human health. The problem of indoor air pollution has attracted widespread attention. At present, the VOCs content in the air is usually detected by the GB / T18883-2002 method. This method is time-consuming, requires a cold trap device, and is complicated to operate. [0003] Solid-phase microextraction (solid-phase microextraction, SPME) is an efficient and rapid new separation technique developed in the la...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/282B01J20/28B01J20/30G01N30/02
CPCB01J20/28066B01J20/28085B01J20/28095B01J20/282G01N30/02
Inventor 刘瑞来赵瑨云林皓胡家朋徐婕付兴平赵升云吴芳芳
Owner 晋江瑞碧科技有限公司
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