Membrane type solid-phase extraction device

Abstract

The invention belongs to the field of separation devices, and specifically relates to a membrane type solid-phase extraction device. The device is characterized in that one end of a liquid conveying pipe penetrates a rubber plug of a sample loading bottle and is inserted into the interior of the sample loading bottle; the other end of the liquid conveying pipe is inserted in a rubber plug of a sample loading cup; a first sieve, a solid-phase extraction membrane and a compression ring are arranged in the interior of the sample loading cup; the interior of a joint is provided with a cathether used for communicating the sample loading cup with a dehydration cup; a screw cap is arranged at the lower end of the dehydration cup; a hydrophobic membrane is jointed with a second sieve, and the hydrophobic membrane and the second sieve are arranged between the dehydration cup and the screw cap; a receiving bottle is arranged on the screw cap, and the interior of the receiving bottle communicates with meshes of the second sieve; a vacuum box cover is arranged outside the joint, the dehydration cup, the screw cap, the hydrophobic membrane, the second sieve and the receiving bottle; a vacuum pump communicates with the upper part of a vacuum box; a water release pipe is arranged at the lower part of the vacuum box; and a water release valve is arranged on the water release pipe.

Description

technical field [0001] The invention belongs to the field of separation devices, in particular to a membrane-type solid-phase extraction device. Background technique [0002] Solid-phase extraction technology is mainly used for the separation, purification and concentration of samples. Compared with the traditional liquid-liquid extraction method, it has the following advantages: 1. Solid-phase extraction can complete sample enrichment and purification at the same time, greatly improving the detection sensitivity; 2. Solid-phase extraction Compared with liquid-liquid extraction, phase extraction is faster, saves more solvents, and can be automated in batch processing; 3. Good reproducibility; 4. It can improve the recovery rate of analytes, and the operation is simple, time-saving and labor-saving. Solid phase extraction technology has been widely used in medicine, food, environment, commodity inspection, chemical industry and other fields, especially in the field of environ...

AI Technical Summary

Problems solved by technology

[0003] At present, although the membrane-type solid-phase extraction equipment applicable on the market has realized the automation of the extraction process, there are the following problems in the use process: 1. The price is expensive; 2. The sample bottle is directly buckled upside down for sample loading. The way of the sample port limits the amount of sample to be loaded too much, which is unfavorable for the analysis of pollutants with low content in the water sample; 3. The residual water in the eluent cannot be removed at the same time; 4. It is inconvenient to discharge the waste liquid

Images