A method for rapid extraction of pesticides in water based on confined liquid film

By using a confined liquid membrane design with alternating carbon nanofibers/carbon fibers and carbon nanofibers/carbon spheres, and combining it with ethanol as the confined solvent, the problem of broad-spectrum and efficiency in pesticide extraction in water in existing technologies has been solved. This enables rapid and convenient extraction of multiple types of pesticides, which is suitable for environmental monitoring and food safety testing.

CN122032316BActive Publication Date: 2026-06-19YANBIAN UNIV
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Patent Information

Application Number
CN202610508904.8
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2026-04-17
Publication Date
2026-06-19
Estimated Expiration
2046-04-17

AI Technical Summary

Technical Problem

Existing methods for extracting pesticides from water are difficult to achieve broad-spectrum, high-efficiency, and simple extraction. They cannot simultaneously and rapidly extract multiple types of pesticides with a wide range of polarities, and they are also costly in terms of materials and complex in operation.

Method used

A composite substrate membrane filled with alternating carbon nanofibers/carbon fibers and carbon nanofibers/carbon spheres, combined with ethanol as a confining solvent, enables rapid extraction of pesticides from water through a confined liquid membrane design.

Benefits of technology

It achieves efficient simultaneous extraction of 21 pesticides, including organophosphates, organochlorines, pyrethroids, carbamates, and organic heterocyclic compounds. The extraction time is shortened, the recovery rate is high, the operation is simple, and it is suitable for laboratory and field testing.

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Abstract

This invention relates to the field of sample pretreatment technology, and in particular to a rapid extraction method for pesticides in water based on a confined liquid membrane. The method includes the following steps: preparing a composite substrate membrane comprising carbon nanofibers / carbon fibers and carbon nanofibers / carbon spheres; injecting ethanol as a confining solvent through the composite substrate membrane until droplets form beneath the membrane, thus completing the construction of the confined liquid membrane; passing a water sample containing the target pesticide through the confined liquid membrane at a set flow rate; using a desorption solvent at a set flow rate through the confined liquid membrane to elute the extracted target pesticide; collecting the eluent and performing quantitative analysis. This invention, through its ingenious confined liquid membrane design, successfully achieves rapid simultaneous extraction of pesticides with a wide polarity range and multiple categories from water while ensuring high extraction efficiency and good reproducibility.
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