Preparation method of solid-phase microextraction fibers by bonding metal wire with polyion liquid

A polyionic liquid and metal-bonding technology, applied in the field of solid-phase micro-extraction fibers, can solve the problems of easily broken quartz carrier, no chemical bonding, low sensitivity, etc., to control the repeatability of preparation, expand the scope of application, and improve the mechanical strength. Effect

Inactive Publication Date: 2012-07-25
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The initial research was to use free ionic liquids as coatings, but the loss of ionic liquids resulted in low sensitivity and poor reproducibility, etc.
Later, it was reported that polymerized ionic liquids were physically coated on quartz carriers to prepare solid-phase microextraction fibers, which improved thermal stability and reproducibility to a certain extent, but because there was no chemical bonding between the coating and the carrier, the ionic liquids could not be fundamenta

Method used

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  • Preparation method of solid-phase microextraction fibers by bonding metal wire with polyion liquid
  • Preparation method of solid-phase microextraction fibers by bonding metal wire with polyion liquid
  • Preparation method of solid-phase microextraction fibers by bonding metal wire with polyion liquid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Example 1: Preparation of polyionic liquid-bonded stainless steel wire solid-phase microextraction fibers

[0028] It includes the following three steps A, B, and C in turn:

[0029] A. Electroless silver plating on the surface of stainless steel wire

[0030] After polishing the surface of the stainless steel wire with fine sandpaper, wash it with water and ethanol in turn to remove impurities on the surface and increase the surface area. The treated stainless steel wire is put into a mixed solution of silver ammonia solution and glucose solution, the molar ratio of silver ammonia ion and glucose is 1:0.5, the mass concentration of glucose is 30%, and the reaction is carried out at room temperature for 2 hours.

[0031] B. Bonding of Atom Transfer Radical Polymerization Initiation Sites

[0032] Aminopropyltrimethoxysilane and 2-bromoisobutyryl bromide with a ratio of 1:1 were reacted at 0 ° C for 2 hours to obtain an atom transfer radical polymerization initiator (s...

Embodiment 2

[0035] Example 2: Preparation of polyionic liquid-bonded titanium silk solid-phase microextraction fibers

[0036] It includes the following three steps A, B, and C in turn:

[0037] A. Electroless silver plating on the surface of titanium wire

[0038] After polishing the surface of the titanium wire with fine sandpaper, wash it with water and ethanol in turn to remove impurities on the surface and increase the surface area. The treated titanium wire is put into a mixed solution of silver ammonia solution and glucose solution, the molar ratio of silver ammonia ion and glucose is 1:3, the mass concentration of glucose is 5%, and the reaction is carried out at room temperature for 1 hour.

[0039] B. Bonding of Atom Transfer Radical Polymerization Initiation Sites

[0040]Atom transfer radical polymerization initiator was prepared by reacting aminopropyltrimethoxysilane and 2-bromoisobutyryl bromide in a ratio of 1:1 at 0°C for 12 hours. The silver-plated stainless steel wir...

Embodiment 3

[0043] Example 3: Preparation of polyionic liquid-bonded nickel wire solid-phase microextraction fibers

[0044] It includes the following three steps A, B, and C in turn:

[0045] A. Electroless silver plating on the surface of nickel wire

[0046] After polishing the surface of the nickel wire with fine sandpaper, wash it with water and ethanol in turn to remove impurities on the surface and increase the surface area. The treated nickel wire is put into a mixed solution of silver ammonia solution and glucose solution, the molar ratio of silver ammonia ion and glucose is 1:2, the mass concentration of glucose is 15%, and the reaction is carried out at room temperature for 0.5 hour.

[0047] B. Bonding of Atom Transfer Radical Polymerization Initiation Sites

[0048] Atom transfer radical polymerization initiator was prepared by reacting aminopropyltrimethoxysilane with 2-bromoisobutyryl bromide in a ratio of 1:1 at 0°C for 6 hours. The silver-plated stainless steel wire wa...

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Abstract

The invention discloses a method for preparing solid-phase microextraction fibers with a polyion liquid bonding coating on a metal wire carrier, particularly relates to a preparation method by utilizing a surface-initiated atom transfer radical polymerization reaction to graft an ionic liquid on the metal wire in a situ polymerizing manner. The novel method is characterized in that the method comprises the steps of adopting the metal wire as the carrier, performing chemical silvering on the surface of the metal wire firstly, then performing hydroxylation on the silvered layer, bonding an atom transfer radical polymerization initiation site, and preparing the polyion liquid bonding coating on the surface of the metal wire with the ionic liquid containing alkenyl as a monomer by utilizing the surface-initiated atom transfer radical polymerization technology. The solid-phase microextraction fibers prepared by the preparation method disclosed by the invention have the advantages of high mechanical strength, good coating stability, good extraction property and the like, can be used for enrichment analysis of trace components of samples of food, environment, drugs and biochemistry and the like, and are very good in application potential.

Description

technical field [0001] The invention relates to a technology for preparing solid-phase micro-extraction fibers with polyionic liquid bonding coatings on metal wire carriers. Background technique [0002] Solid-phase microextraction (SPME) is a new sample pretreatment technology developed in the 1990s that integrates sampling, enrichment, purification, and analysis. It has been widely used in the fields of environment, food, medicine and biological analysis. The commonly referred to SPME refers to fiber solid phase microextraction, and the core is the preparation of extracted fibers. The stability and extraction properties of the extracted fibers depend on the carrier and the extraction coating. Quartz is a common carrier for preparing solid-phase microextraction fibers. The mechanical properties of quartz are poor, and it is easy to break during operation, which seriously affects the service life of the extraction fibers. In order to improve the mechanical strength of SPE...

Claims

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Application Information

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IPC IPC(8): B01J20/32
Inventor 孙敏罗川南范露露邱化敏
Owner UNIV OF JINAN
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