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Doped polyaniline solid phase microextraction fiber preparation method and application

A technology for extracting fibers and polyaniline, applied in chemical instruments and methods, alkali metal oxides/hydroxides, inorganic chemistry, etc., can solve the problem that the thermal stability of polyaniline coating has not been permanently improved, and protonic acid has volatilization In order to achieve the effect of high practical value, convenient method and high enrichment efficiency

Inactive Publication Date: 2014-11-12
ZHEJIANG UNIV
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Problems solved by technology

Although protonic acid doping can improve the thermal stability of the polymer, the protic acid is volatile, and the thermal stability of the polyaniline coating has not been permanently improved.

Method used

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  • Doped polyaniline solid phase microextraction fiber preparation method and application
  • Doped polyaniline solid phase microextraction fiber preparation method and application

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Embodiment Construction

[0024] The invention discloses an electrochemically modified solid-phase micro-extraction coating, in which doped p-aminobenzenesulfonic acid forms a covalent bond with the surface of a steel wire and exists stably, thereby improving the thermal stability of the polyaniline coating. The coating can effectively extract 19 banned aromatic amines, and separate and analyze them by gas chromatography-mass spectrometry. This method has high sensitivity, low detection limit, reduces the use of organic solvents, and simplifies the experimental process. The impurities are combined with the matrix and exist stably, which improves the thermal stability of the coating

[0025] The electrochemically modified solid-phase microextraction coating of the present invention can be applied to the detection of prohibited 19 aromatic amines, reduces the use of organic solvents, is environmentally friendly, has a simple method, and has strong operability.

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Abstract

The invention discloses a doped polyaniline solid phase microextraction fiber preparation method and application. A novel solid phase microextraction fiber coating is prepared by adopting a sulfanilic acid and an aniline solution and utilizing an electro-deposition reaction. Aromatic amine in water samples can be conveniently and effectively extracted by preparing the sulfanilic acid-polyaniline solid phase microextraction coating. The doped polyaniline solid phase microextraction fiber is prepared through the bonding method, then the novel coating is adopted as an adsorbent to gather trace amount of aromatic amine, the gathering efficiency is high, and the aromatic amine in the water samples is conveniently and effectively gathered.

Description

technical field [0001] The present invention relates to a preparation method and application of solid-phase microextraction fiber doped with polyaniline, in particular to a preparation method of doped polyaniline and its application as an extraction coating material Background technique [0002] Polyaniline (PANI) and its derivatives are typical conductive polymers. Due to its excellent physical properties, good mechanical stability, and the ability to extract different substances, polyaniline is more and more widely used in solid-phase microextraction. Conductive polyaniline is prepared by electrochemical methods. The electrochemical polymerization methods of aniline include potentiodynamic scanning method, constant current polymerization, constant potential method and pulse polarization method. The factors affecting the electrochemical synthesis of polyaniline are: the acidity of the electrolyte solution, the anion species in the solution, the concentration of aniline mon...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/28B01J20/32C02F1/28G01N30/08
Inventor 李巍霞朱岩
Owner ZHEJIANG UNIV
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