Solid-phase micro-extraction coating prepared on basis of polydopamine modified stainless steel wires and preparation method and application thereof

A stainless steel wire, polydopamine technology, applied in chemical instruments and methods, other chemical processes, material separation, etc., can solve problems such as difficulty in controlling coating thickness, and achieve long service life, good preparation reproducibility, and low price. Effect
CN102489272AInactive Publication Date: 2012-06-13NANJING UNIV +1
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
NANJING UNIV
Publication Date
2012-06-13
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a solid-phase micro-extraction coating prepared on the basis of polydopamine modified stainless steel wires and a preparation method and application thereof, which belong to the field of analytical chemistry. The preparation method includes steps of utilizing stainless steel wires which are modified by polydopamine as a solid-phase micro-extraction fiber matrix and utilizing quartz capillary tubes as moulds, and finally forming the solid-phase micro-extraction coating after methacrylic acid and ethylene glycol dimethacrylate are subjected to in-situ polymerization in the capillary tubes and then react with polydopamine so as to be bonded on the surfaces of the stainless steel wires. The solid-phase micro-extraction coating prepared on the basis of polydopamine modified stainless steel wires is applied to pretreatment of analysis of chlorophenols and polychlorinated biphenyls. Mechanical strength is enhanced due to the fact that the stainless steel wires are used as the matrix. The coating is not easy to shed off the surfaces of the stainless steel and is long in service life. Due to the capillary tubes serving as the moulds, the coating is uniform in thickness, fine in reproducibility and low in cost. On the optimum extraction condition, the coating has low limit of detection to four types of chlorophenols and six types of polychlorinated biphenyls and meets requirements of trace analysis.
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Description

Technical field

[0001] The present invention involves a method and application of the use of stainless steel wire as a solid -phase extraction fiber -based system, and the application of solid -phase extraction coating, which involves a polydamine -based modifiers of stainless steel wire preparation and the preparation methods and applications and applications and applications and applications.Essence Background technique

[0002] Solid-Phase MicroExtraction (SPME) technology is a research team developed by Professor Pawliszyn in the University of Waterloo in 1989 based on solid-phase extract.Since its inception in the early 1990s, SPME development has matured. Because it has the advantages of small samples, convenient operations, fast operation, etc., and it is easy to have gas chromatography (GC), high -efficiency liquid chromatography (HPLC), and capillary electrophoresis (CE)., Gas chromatography-mass spectrometer (GC-MS) and other common chromatography instruments, which is ...

Claims

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