Methacrylate polymer solid-phase micro-extraction fibre and method of producing the same

A technology for methacrylic acid and fiber extraction, applied in solid solvent extraction, alkali metal compounds, chemical instruments and methods, etc., can solve the problems of mechanical strength and lack of selectivity of quartz fibers that are not resistant to solvent cleaning, and achieve the goal of overcoming matrix interference, Effects of improving sensitivity and accuracy and improving service life

Inactive Publication Date: 2008-10-08
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is to provide a selective, solvent-resistant cleaning, overcoming the fragility of quartz fibers, and a Methacrylic acid polymer solid-phase microextraction fiber with advantages such as strong practicability and preparation method thereof

Method used

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  • Methacrylate polymer solid-phase micro-extraction fibre and method of producing the same
  • Methacrylate polymer solid-phase micro-extraction fibre and method of producing the same
  • Methacrylate polymer solid-phase micro-extraction fibre and method of producing the same

Examples

Experimental program
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Effect test

Embodiment 1

[0029] Example 1: The comparison between the extraction efficiency of the MAA / TRIM extraction fiber prepared by the present invention for the mixed standard of triazine and organophosphorus pesticide and the direct injection of the mixed standard is given below. Depend on figure 1 It can be seen that by Figure 4 It can be seen that the responses of triazines (peaks 1, 2, 4, 5) and organophosphorus pesticides (peaks 3, 6) on the detector are very close when the mixed solution is directly injected, and when the mixed solution is subjected to MAA / The response signal of triazine after extraction with TRIM extraction head is much higher than that of organophosphorus pesticides. This shows that the extraction fiber can have higher extraction efficiency and selectivity for triazine pesticides containing multiple amino groups through hydrogen bonding.

Embodiment 2

[0030] Example 2: The comparison between the extraction efficiency of heroin and acetylcodeine-n-hexane mixed standard prepared by the MAA / TRIM extraction fiber prepared by the present invention and the direct injection of the mixed standard is given below. Depend on figure 2 It can be seen that the response signal (peak area) on the detector after the heroin and acetylcodeine n-hexane mixed standard is extracted by the MAA / TRIM extraction head is greatly improved compared with the direct injection. This shows that the extraction fiber can have a higher extraction efficiency for opioids containing multiple hydroxyl groups and carbonyl groups through hydrogen bonding.

Embodiment 3

[0031] Example 3: The following is a comparison between the extraction efficiency of the MAA / TRIM extraction fiber prepared by the present invention for the phenoxycarboxylic acid pesticide n-hexane mixed standard and the direct injection of the mixed standard. Depend on Figure 4 It can be seen that the response signal (peak area) on the detector after the phenoxycarboxylic acid alkanes mixed standard is extracted by the MAA / TRIM extraction head is greatly improved compared with the direct injection. This shows that the extraction fiber can have a higher extraction efficiency for phenoxycarboxylic acid pesticides containing multiple carboxyl groups through hydrogen bonding.

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Abstract

The invention relates to a methacrylate polymer solid phase micro extraction fiber and a preparation method thereof, in particular to a solid phase micro extraction. A fiber is provided with a stainless steel substrate which is a stainless steel wire, and one end of the stainless steel wire is provided with a methacrylate polymer coating. The preparation steps of the invention are that: one end of the stainless steel wire is cleaned with water and dried after being ultrasonically cleaned by an acetone solvent and an ethanol solvent; trimethylolpropane trimethacrylate, toluol and azodiisobutyronitrile are added to the methacrylate in sequence, then ultrasonic blending process and nitrogen flushing and deoxygenizing process are conducted, and then a prepolymerization blended solution is obtained; the prepolymerization blended solution is injected to a glass point sampling capillary by a microliter syringe, then the stainless steel wire is vertically inserted into the central part of the point sampling tube, and the two ends of the point sampling tube are sealed by rubber, then the point sampling tube is placed into an oven for polymerizing and cross linked at a certain temperature. After a polymer solution is solidified at the surface of the fiber, the point sampling tube is soaked in a hydrofluoric acid solution for a certain period, then the glass tube wall is removed, and then the solid phase micro extraction fiber is obtained.

Description

technical field [0001] The invention relates to a solid-phase micro-extraction fiber, in particular to the development of a novel solid-phase micro-extraction fiber used in the field of chemical analysis and testing. Background technique [0002] Solid-phase microextraction (SPME) is a new sample pretreatment method developed by Pawliszyn's research group (Belardi R G, Pawliszyn J. Water Pollμt. Res. J. Can., 1989, 24(1): 179-191). This method integrates extraction, concentration and desorption by utilizing the distribution balance of the extracted components between the two phases, and has the characteristics of simple operation, short analysis time, less sample requirement and good reproducibility. At present, commercialized SPME fibers are mainly produced by Supelco, which is mainly prepared by coating the surface of quartz fibers with coating materials with different polarities. Although the commercialized solid-phase microextraction fiber has a good extraction effect o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D11/02B01J20/28B01J20/32
Inventor 陈曦曾景斌陈金美王翊如
Owner XIAMEN UNIV
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