Multichannel parallel automatic solid phase extraction device

Abstract

The invention discloses a multichannel parallel automatic solid phase extraction device, which comprises a steel bottle, a solvent supply device, a quantifying pool, a multichannel changeover valve, a closed and pressure-tight sample bottle, a buffer pool, a solid phase extraction part, and a collection bottle, wherein the solvent supply device is connected with a bus of a third distributor and the steel bottle; the inlet of the quantifying pool is connected to a branch of the third distributor, and the quantifying pool is used for automatically determining the volume of the required solvent;the multichannel changeover valve is provided with a sample adding position and a solvent adding position, and is connected with an outlet of the quantifying pool through a first flow limiting pipe; the inlet and the outlet of the sample bottle are connected with the multichannel changeover valve; the buffer pool is connected with the multichannel changeover valve and is used for keeping a solid phase extraction medium moist; the solid phase extraction part is provided with the solid phase extraction medium and is connected with the buffer pool through a thin pipeline, and a second flow limiting pipe is connected behind the solid phase extraction part; and the collection bottle is positioned below the second flow limiting pipe. The multichannel parallel automatic solid phase extraction device can be used for performing solid phase extraction and eluant concentration on a plurality of samples at the same time, the channels cannot influence one another, so an efficient, automatic and consistent sample processing process is realized.

Description

technical field

[0001] The invention relates to the field of chemical analysis instruments, and relates to a multi-channel parallel automatic solid-phase extraction device. Background technique

[0002] Compared with traditional extraction technology, solid phase extraction technology is a new type of sample pretreatment technology. Compared with liquid-liquid extraction, its application is becoming more and more popular because of its good recovery rate, relatively simple operation, and less solvent consumption.

[0003] There are column type and disc type for manual operation of solid phase extraction, most of which use vacuum device or positive pressure device, column type can generally process multiple samples at the same time, and disc type is mostly for single processing. However, manual solid-phase extraction technology also has its shortcomings. For negative pressure devices, it is difficult to ensure the consistency of the processing process of each channel, becau...

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