Magnetic nano solid phase extraction device based on electromagnetic separation, and extraction method of magnetic nano solid phase extraction device

Abstract

The invention provides a magnetic nano solid phase extraction device based on electromagnetic separation, and an extraction method of the magnetic nano solid phase extraction device, belonging to thetechnical field of solid phase extraction. The extraction device comprises an environment water supply unit, an elution unit, an extraction unit, a collecting device and a main control system, whereinthe extraction unit comprises an extracting device and an electromagnet. The invention firstly uses the electromagnet to replace a magnetic nano solid phase extraction technology of the conventionalpermanent magnet, whether the electromagnet has magnetism or not can be controlled by switching on or off current, and the magnetism can be adjusted by controlling the distance between the electromagnet and the extracting device or by controlling the current. Furthermore, due to the superparamagnetism of a magnetic nano-material, the magnetism of the material can also be controlled by switching onor off the current, and in-situ separation and an enrichment process can be realized by controlling the current; the magnetic nano solid phase extraction device and the extraction method have good application innovation, successfully solve the problem of difficult solid-liquid separation of the conventional solid phase extraction device, and greatly improve the analysis speed of a large-volume environmental water sample.

Description

Technical field [0001] The invention relates to the technical field of solid phase extraction, in particular to a solid phase extraction device and extraction method based on the technology of electromagnetic separation of magnetic nanomaterials. Background technique [0002] As we all know, the content of organic pollutants in the water environment is usually very low, so the sample pretreatment process is an essential part of a complete analysis method. The sample pretreatment time often accounts for more than 70% of the entire analysis process. . Among water environment sample pretreatment technologies, solid-phase extraction technology has gradually replaced traditional liquid-liquid extraction and has become the main separation and enrichment method in sample pretreatment due to its simplicity, rapidity, easy automation and environmental friendliness. [0003] The core of solid phase extraction technology is solid phase extraction agent and solid phase extraction device. Sol...

AI Technical Summary

Problems solved by technology

[0009] In order to solve the common problems of existing magnetic nano solid phase extraction devices, such as easy pollution and low level of automation, especially when processing large-volume environmental water samples, it is often difficult to achieve solid-liquid separation due to the limited magnetic strength of the magnet

Images