Waste liquid collection device for gel permeation chromatography

Abstract

A waste liquid collection device for a gel permeation chromatograph, comprising: a waste liquid transfer tank and a waste liquid barrel; the waste liquid transfer tank stands outside the waste liquid barrel; There is a diaphragm in the middle of the inner chamber of the transfer tank, which divides the inner chamber into an absorbent chamber and a waste liquid transfer chamber; the lower part of the waste liquid transfer tank and the lower part of the diaphragm are multi-fold stretchable structures; the absorbent chamber A trachea is vertically arranged, the upper end of the trachea passes through the upper part of the diaphragm, and the lower end is arranged at the bottom of the absorbent chamber; the trachea communicates with the absorbent chamber and the waste liquid transfer chamber; the invention can avoid waste liquid dripping when replacing the waste liquid barrel, It also avoids the process of pulling out the drain pipe and reinstalling it in a new waste liquid bucket, simplifies the operation of replacing the waste liquid bucket, shortens the time for replacing the waste liquid bucket, and reduces the pollution of the air in the laboratory. Let the operator inhale toxic and volatile waste gas as little as possible.

Description

technical field [0001] The invention belongs to the technical field of waste liquid collection, and in particular relates to a waste liquid collection device for a gel permeation chromatograph. Background technique [0002] Gel Permeation Chromatography, GPC (Gel Permeation Chromatography), also known as Size Exclusion Chromatography [SEC (Size Exclusion Chromatography)], uses a solvent as the mobile phase and flows through a porous filler (such as porous silica gel or porous resin) as the separation medium. liquid chromatography. [0003] GPC is a branch of liquid chromatography. Its separation component is a chromatographic column with a porous gel as a carrier. The surface and interior of the gel contain a large number of cavities of different sizes that penetrate each other. The composition of the GPC instrument: pump system, (automatic) sampling system, gel chromatography column, detection system and data acquisition and processing system. [0004] In the food testing...

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Problems solved by technology

[0004] In the food testing industry, when analyzing pesticide residues and semi-volatile organic compounds in various foods, agricultural products, and aquatic products, organic sample extracts generally contain macromolecular substances. If these substances are not removed, the chromatographic column will be damaged. The separation efficiency is reduced, and the service life of the injection port and the chromatographic column is shortened, which in turn affects the data analysis results.

Therefore, effective purification pretreatment must be carried out before the analysis of pesticide residues and semi-volatile organic compounds. However, the traditional pretreatment process takes a long time and consumes a lot of solvents. Therefore, the application of GPC is an inevitable trend, especially in third-party In professional food testing institutions, GPC has been widely used

[0005] A large amount of mobile phase is needed when GPC is running. Taking a certain Agilent GPC instrument as an example, ethyl acetate: cyclohexane = 1:1 is used as the mobile phase, and the mobile phase consumption per 12h is about 8L. After the mobile phase is used If the waste liquid is not replaced or emptied in time, the overflow of the waste liquid will cause ground corrosion and serious pollution of the laboratory air. This situation is not uncommon in the laboratory; even in normal use, the waste The volatilization of organic solvents in the liquid barrel will also cause air pollution in the laboratory and affect the health of the experimenters; in addition, when replacing the waste liquid barrel, the drain pipe needs to be taken out from the old waste liquid barrel and reinstalled in the new waste liquid barrel If you do not suspend the operation of the GPC instrument at this time, it will inevitably cause some of the waste liquid in the drain pipe to drop on the ground. Manually take out the drain pipe from the old waste liquid bucket and reinstall it in the new waste liquid bucket. It will inevitably pollute the hands of the operator; in addition, the handling of the heavy waste liquid bucket is also quite laborious, and occasionally dangerous situations such as tipping over during handling may occur

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