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A kind of solid-phase microextraction probe and preparation method thereof

An extraction and stainless steel wire technology, applied in the field of analytical chemistry, can solve the problems of low preparation efficiency, cumbersome process, and long time, and achieve the effect of fast and rapid preparation

Active Publication Date: 2022-05-31
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in these preparation techniques based on POSS / GO polymeric materials, GO-based nanosheets need to be coated on the pretreated support fibers first, and then functional POSS chemicals are anchored on the GO coating, which requires the use of conventional amine- Modification by carboxyl or amine-epoxy reaction, the process of chemically bonding POSS / GO composites to fibers is cumbersome and takes a long time, even tens of hours, and the preparation efficiency is low

Method used

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  • A kind of solid-phase microextraction probe and preparation method thereof
  • A kind of solid-phase microextraction probe and preparation method thereof
  • A kind of solid-phase microextraction probe and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

(4) The stainless steel wire prepared by step (2) is immersed in the solution of step (3), then pulled out and smoothly put into the UV cross section.

The modified graphene-polysiloxane coating was synthesized by in-situ photopolymerization at 365 nm wavelength for 5 min in a tandem instrument; ethanol was used

Wash the coating and place in the GC inlet at 250 °C N

2

Dry under atmosphere for 12 h.

Table 1 alkenyl modified graphene-nanometer siloxane polymer coating component content table

[0034]

γ-MAPS@GO: methacryloxypropyltrimethoxysilane-modified graphene oxide

POSS-MA: monomer methyl methacrylate cage silsesquioxane

Taking table 1 formula B as an example, POSS / γ-MAPS@GO solid phase microextraction coating has been characterized:

[0038] The polymeric coating is uniformly covered on the stainless steel fiber surface, and the polymeric clusters are relatively uniform (Fig. 1); the POSS / γ-

Embodiment 2

For example, when γ-MAPS@GO:POSS = 10.9: 14.5, a larger amount of hydrophilic γ-MAPS@GO nanosheets was added, the theoretical

The hydrophobicity and mechanical properties of the obtained polymers were reduced, and the adsorption performance to PCMs was reduced.

[0042] with commercial Carboxen / polydimethylsiloxane (CAR / PDMS), polydimethylsiloxane (PDMS) and polydimethylsiloxane

Siloxane / divinylbenzene (PDMS / DVB) comparison (Figure 6 and Table 2), for Sally Musk, Sandalwood Musk, Truss, Galore

[0044]

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Abstract

The invention relates to a solid-phase microextraction probe and a preparation method thereof. It is based on ultraviolet light-induced polymerization, using modified graphene oxide containing ethylenic functional groups and polysiloxane containing nano-cage structure as monomers, and in-situ cross-linking polymerization on stainless steel wires with mercapto groups on the surface to form functionalized coatings. Layer, and at the same time through the "mercapto-ene" click chemistry of the thiol on the stainless steel wire and the olefin on the monomer to realize the solid phase microextraction probe immobilized on the coating. The prepared micro-extraction probe supports the modified graphene through the rigid skeleton of polysiloxane monomer, which effectively prevents the aggregation of graphene and realizes the stable distribution of graphene. Domain π‑π bond and strong hydrophobic effect, simple preparation and operation, short cycle time (5min), the probe has good adsorption performance for volatile aromatic organic pollutants in environmental water, and can provide good pretreatment materials and materials for environmental analysis Technical Support.

Description

A kind of solid-phase microextraction probe and preparation method thereof technical field The invention belongs to analytical chemistry field, be specifically related to a kind of based on alkenyl modified graphene-nano siloxane polymerization A coating-functionalized solid-phase microextraction probe and a preparation method thereof. Background technique [0002] High-performance sample pretreatment is one of the keys to achieving accurate and sensitive analysis in analytical chemistry. solid phase microextraction SPME It is simple and solvent-free, and has been widely used in GC‑MS. So far, there have been developed including traditional polypropylene Traders including alkenoate (PA), polydimethylsiloxane (PDMS) and polydimethylsiloxane / divinylbenzene (PDMS / DVB) Coated with SPME. However, traditional fiber coatings still suffer from low absorption capacity and long polymerization time. Therefore, developing heat High-efficiency strategies and functional fiber ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D15/20B01J20/26B01J20/30
CPCB01D15/20B01J20/26
Inventor 齐国敏
Owner FUZHOU UNIV
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