Solid-phase extraction device used for pre-treating sample

Abstract

The invention provides a solid-phase extraction device used for pre-treating a sample and belongs to the technical field of detection of pesticide residues, veterinary drug residues and fungaltoxin. The solid-phase extraction device is composed of a separation device and a collection device. The separation device is composed of a main body framework, a connection pipe and a waste liquid collection bottle; and the main body framework is composed of a porous plate, a solution buffering tank, and supporting frameworks at two sides. The collection device is composed of three layers of porous plates, a bottom plate without a hole, and the supporting frameworks at the two sides. Each porous plate is provided with a certain quantity of round holes with certain specifications. According to the device, a separation step and a collection step of the solid-phase extraction are separately carried out so that the high-efficiency operation in a pre-treatment process of the sample can be guaranteed, and the detection flux of the sample is relatively high. Meanwhile, the types and positions of the porous plates in the device can be replaced according to experiment requirements so that the flexible and multifunctional utilization of the solid-phase extraction device is realized. The device is easy to operate and is feasible, and can be used for purifying and enriching pesticides, veterinary drugs and fungaltoxin in all the samples.

Description

technical field [0001] The invention relates to a solid-phase extraction device used for sample pretreatment, which belongs to the technical field of detection of pesticide residues, veterinary drug residues and mycotoxins. Background technique [0002] Solid phase extraction is to use a solid adsorbent to adsorb the target compound in the liquid sample, so that the target compound is separated from the sample matrix and interfering compounds, and then eluted with an eluent to achieve the purpose of separating and enriching the target compound. As a sample pretreatment technique, solid phase extraction has been more and more widely used in laboratory sample pretreatment. [0003] The solid-phase extraction step includes four steps of pretreatment of the solid-phase extraction column, sample loading, rinsing, and elution collection. The target extract in the sample is adsorbed on the solid-phase extraction column filler, and a medium-intensity mixing medium is selected. Solv...

AI Technical Summary

Problems solved by technology

[0005] 1. The existing solid-phase extraction device can process multiple samples at the same time, but most of them are integrated solid-phase extraction devices. If there is a difference in the length of the column passing time, all the columns need to wait for the slowest column to complete the leaching. The elution step can only be carried out after the washing step, which limits the pretreatment time of the sample to a certain extent;

[0006] 2. When the existing commercial solid-phase extraction device receives the eluent, if it needs to receive a large volume (more than 50mL) of the eluent, the receiving tube cannot be replaced conveniently, and it can only be waited for when all the small columns are eluted , to replace the receiving tube;

[0007] 3. Most of the existing commercial solid-phase extraction devices are glass cylinders, which have certain potential safety hazards;

[0008] 4. The price of existing commercial solid-phase extraction devices is not low, which affects its application range

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