Preparation method and application of solid phase extraction membrane comprising amphipathicity functional group

Abstract

The invention relates to a solid phase extraction membrane comprising an amphipathicity functional group and applications of the solid phase extraction membrane in enrichment and extraction of trace phenols in an environment water body. A macromolecular non-woven cloth solid phase extraction membrane material with the amphipathicity functional group is prepared by taking a polypropylene and polyethylene copolymerization melt-blown non-woven cloth material as a base material and uniformly and respectively bonding a lipophilic unsaturated fattyacid alkyl ester monomer and hydrophilic ethoxyethanol unsaturated fattyacid alkyl ester to the surface of the non-woven cloth material. The non-woven cloth prepared by the invention contains a crylic acid alkyl ester lipophilic group and a hydroxyl alkyl ester hydrophilic group, so that in the process of extracting a phenol type polar compound, the non-woven cloth synchronously develops nonpolar intermolecular force and hydrogen-bond interaction and has relatively high extraction performance. The non-woven cloth material is used for preparing a solid-phase disk membrane; and in a water sample enrichment process, the mass transfer speed is high; and a large size of environment water samples can be quickly enriched and extracted.

Description

technical field [0001] The invention relates to a solid-phase extraction membrane containing an amphiphilic functional group and its application. In particular, it relates to an amphiphilic solid-phase extraction diaphragm capable of enriching and extracting trace amounts of phenolic compounds in environmental water. Background technique [0002] More and more environmental monitoring and analysis objects are trace or even trace pollutants. Although the current instrumental analysis methods can reach trace or even ultra-trace levels, for complex samples, direct analysis is still very difficult due to the presence of matrix effects and interfering substances. difficulty. Therefore, pretreatments such as separation, enrichment and concentration before sample analysis are very important to obtain accurate final results. The solid-phase extraction technology developed in the late 1970s has a high enrichment factor for samples, a fast extraction speed, a small amount of solvent...

AI Technical Summary

Problems solved by technology

[0007] In summary, the analytical methods used to detect and analyze low-concentration and trace phenolic compounds in environmental water often involve the enrichment and extraction of samples, and the existing enrichment and extraction methods have complex operations and the use of toxic organic compounds to varying degrees. Solvent, low extraction efficiency and other defects, so it is necessary to develop a kind of enrichment extraction material and method suitable for low-concentration phenolic compounds in environmental water