Solid-phase extraction device

Abstract

The invention discloses a solid-phase extraction device. The solid-phase extraction device comprises a whole machine shell, wherein a sealing upper cover is arranged on the upper surface of the wholemachine shell; a ventilation rubber barrel is fixedly arranged on the sealing upper cover; a liquid dropping needle is fixedly arranged on the ventilation rubber barrel in a penetrating manner; one side of the ventilation rubber barrel is connected with a ventilation bent pipe; the ventilation bent pipe is provided with a filtering connector; the lower end of the ventilation rubber barrel is connected with a solid-phase cavity column; adsorption filler sieving plates are arranged at upper and lower ends of the solid-phase cavity column; a U-shaped placement groove is fixedly formed in the inner surface of the whole machine shell; a push-pull solid-phase column bracket is arranged in the U-shaped placement groove; the push-pull solid-phase column bracket is provided with a plurality of inserting holes which are matched with the position of the solid-phase cavity column; wear-resisting rubber cushions are arranged in the inserting holes. The solid-phase extraction device disclosed by theinvention is convenient to operate, a detected substance is more completely extracted and the adaptability is strong; the solid-phase extraction device can be adaptive to different sizes of a solid-phase column and a pear-shaped bottle, is convenient and easy to operate and use and can be circularly and repeatedly utilized; the solid-phase extraction device can be used under normal pressure and has higher efficiency of separating the detected substance and an interfering substance, and the utilization safety is improved.

Description

technical field [0001] The invention relates to the technical field of solid phase extraction, in particular to a solid phase extraction device. Background technique [0002] Solid phase extraction, referred to as SPE, was first proposed in the 1970s. Compared with the traditional extraction technology, it is a new type of sample pretreatment technology. Compared with liquid-liquid extraction, it can effectively shorten the processing time of samples, has the advantages of high recovery rate, simple operation, and less solvent consumption, and can completely eliminate the inevitable interfacial emulsification phenomenon of liquid-liquid extraction. Therefore, solid phase extraction is gradually developing into a mainstream sample pretreatment technique. [0003] The operation of solid phase extraction generally has four steps: [0004] Activation - remove impurities in the solid phase extraction column and create a certain solvent environment; [0005] Sample loading—diss...

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Problems solved by technology

[0008] In the widely used solid-phase extraction device at present, a vacuum pump is added to the extraction device to extract the air inside the shell of the extraction device, so that the extraction device is in a state of negative high pressure, so that the sample solution can flow smoothly into the solid-phase column. The extraction operation results in high noise and vibration, which affects the extraction effect and efficiency, and the extraction of the measured substance is not complete. In addition, the extraction device is in a state of negative high pressure, which increases the pressure of the shell, resulting in unsafe operation and potential safety hazards.

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