CN201710998U - Continuous matrix solid phase extraction column - Google Patents

Abstract

A continuous matrix solid-phase extraction column, comprising a column, an inlet (5) at the top of the column and an outlet (1) at the bottom, the inner and outer diameters of the outlet are smaller than the inner and outer diameters of the column, and the column is divided into a lower base column ( 2) and the upper continuation column (7), the inner wall of the base column and the inlet (5) of the continuation column has an annular grinding surface, the outer wall has a male threaded upper joint (4), and the outer wall of the continuation column outlet (1) also has a The lower joint (6) of the grinding surface (8) of the ring and the female thread. The utility model relates to a chemical experiment equipment, which is specially used for the solid-phase extraction of substrates. Compared with the prior art, it can be used repeatedly and the length can be continued as needed, which overcomes the costly and high-cost problems caused by one-time use. Disadvantages and fixed-length glass extraction columns are difficult to pack and pack, it is difficult to enrich and extract all samples, and the disadvantages of poor versatility improve the versatility.

Description

Sequential Matrix SPE Columns

technical field

The utility model relates to a chemical experiment equipment, which is a matrix solid-phase extraction column that can be extended as required.

Background technique

Modern separation and analysis technology is faced with the increasingly complex analysis objects, and the content of analyte-related components is getting lower and lower. For this reason, sample pretreatment technology is particularly important in sample analysis. Matrix solid-phase extraction technology is a solid-liquid separation and extraction sample pretreatment technology based on solid-phase extraction technology. The mixed and ground sample to be tested and adsorbent are directly loaded into the extraction column as a matrix, and the solvent is used to Elution and concentration complete the pretreatment of the sample. General-purpose solid-phase extraction columns, some of which are disposable items, are disposable after use, causing waste. For the extraction of large-scale samples, the number of columns used is large and the extraction cost is high; while the glass solid-phase extraction columns currently used in laboratories Although it can be used repeatedly, the length is fixed, the inner volume of the column is small, it is difficult to fill the column, and it is difficult to enrich and extract all samples, so the versatility is poor.

Utility model content

The technical problem to be solved by the utility model is to provide a continuous matrix solid-phase extraction column.

The technical solution to solve this technical problem is: the continuous matrix solid-phase extraction column includes a column body, an inlet at the top of the column body and an outlet at the bottom, the inner and outer diameters of the outlet are smaller than the inner and outer diameters of the column body, and the column body is divided into lower parts. The base column and the upper continuation column, the inner walls of the base column and the continuation column inlet all have annular grinding surfaces, the outer walls have upper joints with male threads, and the outer walls of the continuation column outlets also have annular grinding surfaces and lower joints with female threads.

There are scales on said base column and continuation column.

The beneficial effect of the utility model is that the extraction column can be continuously lengthened according to the actual needs of the experiment, and one, two or more sections can be connected. The connection is convenient and the combination is firm, which not only reduces the consumption cost of extraction, but also increases the installation cost. The convenience of column filling improves the versatility.

Description of drawings

Fig. 1 is the schematic diagram of the base column structure of the utility model.

Fig. 2 is a schematic diagram of the structure of the continuation column of the present invention.

Fig. 3 is a schematic diagram of the connection relationship of the use state of the utility model.

Detailed ways

The utility model is described in detail below in conjunction with the embodiments and with reference to the accompanying drawings: see Fig. 1, the base column 2 of the present utility model is based on the existing solid-phase extraction column, and an upper joint 4 with a male thread is added on the upper outer wall , the inner wall of the inlet 5 is arranged into an annular grinding surface; Fig. 2 shows the structure of the continuation column 7 of the present utility model, the upper outer wall also has an upper joint 4, the lower outer wall has a lower joint 6 with a female thread, and the inner wall of the inlet 5 is also arranged as an annular grinding surface. On the surface, the outer wall of the outlet 1 has a ring-shaped grinding surface 8, which cooperates with the ring-shaped grinding surface of the inlet 5 inner wall when connecting. There are scales 3 on the outer walls of the base column 2 and the continuation column 7. The outer diameters of the base column and the continuation column are equal, and the inner diameters are also equal. The upper connector 4 matches. The upper and lower joints 4 and 6 can be made of the glass homogeneous material of the cylinder or be made of stainless steel. The inner and outer diameters of the outlets of the base column and the auxiliary column are smaller than the inner and outer diameters of the respective cylinders. The shape and specification of the outlet 1 of the base column are the same as those of the existing solid phase extraction column. The diameter of the outlet 1 of the auxiliary column 7 is slightly retracted, and the inner and outer walls There is a narrow inclined surface, and the outer wall of the inclined surface is an annular grinding surface, which is conducive to the cooperation of the grinding surface of the inner wall of the lower inlet 5 when connecting, and is beneficial to shelving the sieve plate 9 as required during use. Fig. 3 shows the continuation relationship of each part of the utility model in use state, and from top to bottom are successively air compressor 10, continuous column 7, base column 2 and the liquid contact bottle 11 that can be connected with vacuum pump to generate negative pressure. When in use, firstly connect the base column and the follow-up column firmly, and then grind the analyte, adsorbent, etc. according to the ratio of the experimental design evenly as the matrix, and place a sieve plate 9 on the base of the base column 2 or two sieve plates 9 Place the base column 2 and the base of the follow-up column 7 respectively above the outlet, add a matrix 12 on the sieve plate 9, make the matrix uniform and dense through oscillation, connect the liquid-receiving bottle 11 at the outlet 1 of the base column 2, and Add solvent to the column at the top inlet 5 for rinsing, use an air compressor such as a medical syringe 10 and/or a negative pressure device to accelerate the extraction speed, the amount of matrix added can be reflected in scale 3, and the liquid contact bottle After the eluate is collected, it is concentrated and constant volume by nitrogen blowing, and the extraction work is completed, and the detection and analysis can be carried out.

The extraction column is made of transparent hard material. Considering the combination of grinding surface and screw thread, the column body should be made of inorganic glass. Although organic glass is not easy to break, it is easy to crack due to aging. The specifications and shapes of the screw thread can have various schemes, which can be comprehended by ordinary technical personnel in the same industry, so the accompanying drawings and detailed descriptions are no longer required. The upper joint 4 with male thread should be made of glass consistent with the cylinder, and the lower joint 6 with female thread can also be made of stainless steel as a cover type, but this requires a convex ring to be made on the outer wall of the outlet 1 so that it can be sleeved on the cylinder. The stainless steel cover on the outer wall can be screwed and positioned.

Claims (2)

1. splice matrix solid-phase extraction column, comprise the import (5) of cylinder, the pre-portion of cylinder and the outlet (1) of bottom, the interior external diameter of outlet is less than the interior external diameter of cylinder, it is characterized in that cylinder is divided into the continuous post (7) on pilum of bottom (2) and top, the inwall of the import of pilum and continuous post (5) all has the flour milling of annular, outer wall has the top connection (4) of pin thread, and the outer wall of continuous column outlet (1) also has the flour milling (8) of annular and the lower contact (6) of negative thread.

2. splice matrix solid-phase extraction column as claimed in claim 1 is characterized in that on said pilum (2) and the continuous post (7) scale (3) being arranged.

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