A kind of composite nanofiber online micro solid phase extraction column and preparation method thereof

A technology of composite nanofiber and solid phase extraction column, which is applied in the direction of separation method, fiber treatment, fiber type, etc., can solve the problems of limiting the development and application of micro solid phase extraction technology, limited types of solid phase adsorbents, poor extraction selectivity, etc. , to achieve the effect of strong anti-matrix interference, low cost and high porosity

Active Publication Date: 2021-09-24
HUAZHONG NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, commercial solid-phase extraction columns have the following problems: commercial solid-phase adsorbents have limited types, poor extraction selectivity, low extraction efficiency, etc., and most of them are disposable and expensive
These shortcomings limit the further development and application of micro solid phase extraction technology, so it is urgent to develop and prepare new adsorbent materials

Method used

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  • A kind of composite nanofiber online micro solid phase extraction column and preparation method thereof
  • A kind of composite nanofiber online micro solid phase extraction column and preparation method thereof
  • A kind of composite nanofiber online micro solid phase extraction column and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Example 1 PS / SiO 2 Preparation of @PDA Composite Nanofiber Online Micro Solid Phase Extraction Column Device

[0033] The present invention prepares PS / SiO by electrospinning technology 2 spinning material, and then prepare the PS / SiO by self-polymerization of dopamine 2 @PDA online micro solid phase extraction column, the preparation process is as follows figure 1 with figure 2 , including the following steps:

[0034] (1)PS / SiO2 2 Preparation of nanofibers: 20 mg of silica (SiO 2 ) particles were added to 10 milliliters of N,N-dimethylformamide solvent (DMF), and ultrasonically dispersed for 1 hour to obtain a dispersion solution; then, 1.5 grams of polystyrene (PS) was added to the dispersion solution, and the Stir the mixed solution for 48 hours to obtain a uniform electrospinning solution; then, transfer the viscous electrospinning solution to a 50 ml plastic syringe and fix it on a constant-flow syringe pump. The nozzle of the syringe is a stainless steel t...

Embodiment 2

[0040] Example 2 PS / SiO 2 Investigation on the Service Life of @PDA Composite Nanofiber Online Micro Solid Phase Extraction Column

[0041] Measure the PS / SiO that the embodiment of the present invention 1 makes 2 Extraction lifetime of hydroxylated polycyclic aromatic hydrocarbons (1-hydroxypyrene, 2-naphthol and 3-hydroxyphenanthrene) with @PDA composite nanofiber online micro solid-phase extraction column. The PS / SiO that the embodiment of the present invention 1 makes 2 The @PDA composite nanofiber online micro-solid phase extraction column continuously carried out the extraction and enrichment experiments of hydroxylated polycyclic aromatic hydrocarbons (1-hydroxypyrene, 2-naphthol and 3-hydroxyphenanthrene). , 52 times and 70 times) to analyze and compare the peak areas of the three target substances, so as to investigate the service life of the online solid phase extraction column pair.

[0042] The adsorbent PS / SiO 2 The amount of @PDA composite nanofiber is 4 mg, ...

Embodiment 3

[0044] Example 3 PS / SiO 2 @PDA composite nanofiber online micro solid phase extraction column and homemade PS / SiO 2 Comparison of the Enrichment Capabilities of Hydroxylated PAHs by On-line Micro Solid Phase Extraction Columns for Spinning Materials

[0045] Measure the PS / SiO that the embodiment of the present invention 1 makes 2 @PDA composite nanofiber online micro solid phase extraction column and homemade PS / SiO 2 The enrichment ability of the spinning material online micro-solid phase extraction column to hydroxylated polycyclic aromatic hydrocarbons (1-hydroxypyrene, 2-naphthol and 3-hydroxyphenanthrene): the PS / SiO prepared in Example 1 of the present invention 2 @PDA composite nanofiber online micro solid phase extraction column and homemade PS / SiO 2 Spinning material on-line micro-solid phase extraction column, when in the Loading position, extract 2 ml of 1-hydroxypyrene (1-hydroxypyrene), 2-naphthol (2-naphthol) and 3-hydroxyphenanthrene (3-hydroxyphenanthrene) ...

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Abstract

The invention belongs to the field of solid phase extraction, in particular to a PS / SiO 2 @PDA composite nanofiber online micro solid phase extraction column and its preparation method. The online micro-solid phase extraction column includes a pre-column column cover, a pre-column core filled with an adsorbent material and a manual six-way valve, and the adsorbent material is PS / SiO 2 @PDA composite nanofibers, the PS / SiO 2 @PDA composite nanofiber is prepared by PS / SiO 2 Electrospun materials, and PS / SiO 2 The electrospun material was placed in dopamine salt solution to make dopamine in PS / SiO 2 Surface self-polymerization of electrospun materials to form PS / SiO 2 @PDA composite nanofibers. The present invention combines PS / SiO 2 @PDA composite nanofiber micro-solid phase extraction column combined with online extraction technology has a high degree of automation, easy operation, fewer sources of error, and high sensitivity. It is suitable for sample pretreatment of trace analytes in complex matrices.

Description

technical field [0001] The invention belongs to the field of solid phase extraction, in particular to a PS / SiO 2 @PDA composite nanofiber online micro solid phase extraction column and its preparation method. Background technique [0002] Solid Phase Extraction (Solid Phase Extraction, SPE) technology was proposed in the 1970s and is currently the most commonly used sample pretreatment technology. SPE is based on liquid column chromatographic separation, and the solid-phase adsorbent is used as the stationary phase. When the liquid sample solution flows through, the analyte is retained by the solid-phase adsorbent, and then an appropriate solvent is selected to elute the analyte, thereby To achieve the purpose of purification, separation and enrichment. This technology can be used online with the instrument, and can process specific trace substances in different complex matrix samples in a green, efficient and rapid manner. Therefore, SPE is widely used in different field...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D15/22B01J20/285G01N30/06D06M15/37D01F6/56D01F1/10D06M101/20
CPCB01D15/22B01J20/285D01F1/10D01F6/56D06M15/37D06M2101/20G01N30/06G01N2030/062
Inventor 徐晖陈丹田馨梦胡嘉嘉陈延妍
Owner HUAZHONG NORMAL UNIV
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