CN212308923U

CN212308923U - Combined solid phase extraction column

Info

Publication number: CN212308923U
Application number: CN202020929523.5U
Authority: CN
Inventors: 张向兵; 宋敏杰; 李秀萍; 徐坤; 冉晓龙
Original assignee: Henan Geyue Testing Technology Co ltd
Current assignee: Henan Geyue Testing Technology Co ltd
Priority date: 2020-05-27
Filing date: 2020-05-27
Publication date: 2021-01-08
Anticipated expiration: 2030-05-27

Abstract

The utility model discloses a combined solid phase extraction column, which comprises a sample loading pipe, wherein sample outlets of the sample loading pipe can be connected in series with a plurality of extraction units, and the last stage is provided with sample outlets of the extraction units, sleeves are arranged between the sample loading pipe and the extraction units, between adjacent extraction units, and between the extraction units and the sample outlets, two ends in each sleeve are provided with a first annular bulge, and the side walls of the sample loading pipe, the two ends of the extraction units and the side walls of the sample outlets are provided with second annular bulges which are clamped with the first annular bulges, and the middle part in each sleeve is provided with a sealing structure; use the utility model discloses the time, but the sample loading pipe has a plurality of extraction units with going out to establish ties between the sample pipe, can set up the adsorbent of different grade type in the extraction unit, when carrying out the analysis extraction to different compounds, can establish ties different extraction units, once only satisfies the extraction requirement, has reduced the detection cost, has improved the treatment effeciency.

Description

Combined solid phase extraction column

Technical Field

The utility model belongs to the technical field of processing apparatus before the chemical analysis test, a modular solid-phase extraction post is related to.

Background

The solid phase extraction is a sample pretreatment technology developed in recent years, is developed by combining a liquid-solid extraction technology and a column liquid chromatography technology, is mainly used for separating, purifying and concentrating samples, can improve the recovery rate of analytes, more effectively separates the analytes from interfering components, reduces the sample pretreatment process, and is simple to operate, time-saving and labor-saving. The method is widely applied to the fields of medicine, food, environment, commodity inspection, chemical industry and the like.

Adsorbent types and adsorbent weights in the commercially-used solid-phase extraction columns are fixed, when a certain sample needs to be analyzed in multiple groups, if different compounds have different retention properties, all compounds to be detected are difficult to separate through one extraction column, and the compounds need to be analyzed through multiple extraction columns, so that the detection cost is increased, and the treatment efficiency is also reduced.

SUMMERY OF THE UTILITY MODEL

To the above problem, the utility model provides a modular solid-phase extraction post, fine solution in the extraction post of prior art when assay multiple compound with high costs, the problem of inefficiency.

In order to realize the purpose, the utility model discloses a technical scheme as follows: the utility model provides a modular solid-phase extraction post, includes the sample tube, it has a plurality of extraction units, the final stage to go up sample tube play appearance mouth and can establish ties, the play appearance mouth of extraction unit is provided with out the sample tube, it all is provided with the sleeve between sample tube and the extraction unit, between the adjacent extraction unit and between extraction unit and the play appearance pipe to go up the sample tube, both ends all are provided with first annular arch in the sleeve, go up the sample tube lateral wall, extract the lateral wall at unit both ends and go out the sample tube lateral wall on all be provided with the protruding second annular arch of looks joint of first annular arch, the middle part is provided with seal structure in the sleeve.

Further, seal structure includes the annular groove, with the fixed annular slab of sleeve inner wall and set up on the annular slab side and can insert the annular groove in the third annular is protruding, the annular groove is seted up on sample tube appearance mouth terminal surface, extraction unit both ends terminal surface, the appearance tube appearance mouth terminal surface of going out, the protruding outer periphery of third annular is provided with the sealing ring.

Furthermore, the opening edge of the annular groove is provided with a fillet.

Furthermore, the inner diameters of the annular plates are smaller than the diameters of the sample outlet of the upper sample tube, the ports of the extraction units and the sample inlet of the sample outlet tube.

Furthermore, the cross sections of the first annular bulge and the second annular bulge are in a semicircular shape, a triangular shape or an isosceles trapezoid shape.

Further, the diameter of the inner wall of the extraction unit is the same as that of the inner wall of the sampling pipe.

Compared with the prior art, the utility model discloses following beneficial effect has:

1. use the utility model discloses the time, but the sample loading pipe has a plurality of extraction units with going out to establish ties between the sample pipe, can set up the adsorbent of different grade type in the extraction unit, when carrying out the analysis extraction to different compounds, can establish ties different extraction units, once only satisfies the extraction requirement, has reduced the detection cost, has improved the treatment effeciency.

2. When connecting the extraction unit, the joint component can convenient and fast will be adjacent the extraction unit or extract the unit and go up appearance pipe or extract the unit and go out the appearance pipe and connect, further improves the treatment effeciency.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is an enlarged view of section I of FIG. 1;

fig. 3 is an enlarged view of a portion II of fig. 2.

In the figure: the sample loading pipe (1), the extraction unit (2), the sample outlet pipe (3), the second annular bulge (4), the sleeve (5), the first annular bulge (6), the annular groove (7), the annular plate (8), the third annular bulge (9), the sealing ring (10) and the fillet (11).

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 1, a modular solid-phase extraction post, including sample tube 1, sample tube 1 play appearance mouth can be established ties and have a plurality of extraction unit 2, the final stage sample tube 2's play appearance mouth is provided with out appearance pipe 3, sample tube 1 and extraction unit 2 between, adjacent extraction unit 2 between and extraction unit 2 and go out all be provided with sleeve 5 between appearance pipe 3, both ends all are provided with first annular arch 6 in the sleeve 5, all are provided with the second annular arch 4 with the protruding 6 looks joints of first annular on sample tube 1 lateral wall, the lateral wall at extraction unit 2 both ends and the play appearance pipe 3 lateral wall, the middle part is provided with seal structure in sleeve 5.

In the embodiment, the upper end of the sampling pipe 1 is in a straight cylinder shape or a funnel shape; the extraction unit 2 is in a straight cylinder shape, two parallel sieve plates are arranged in the middle of the extraction unit 2, an adsorbent for adsorbing compounds is filled between the two sieve plates, the types of the adsorbents in different extraction units 2 can be arranged in the same or different ways, so that the analysis requirements of different compounds are met, the upper end of the sample outlet pipe 3 is in a barrel shape, and the lower end of the sample outlet pipe 3 is integrally connected with a thin pipe for discharging liquid; when the extraction unit 2 is installed, the sleeve 5 is sleeved on the first annular bulge 6 of the upper stage, then the extraction unit 2 to be installed is arranged in the sleeve 5 in a penetrating mode, the first annular bulge 6 of the extraction unit 2 and the second annular bulge 4 of the sleeve 5 are connected in a clamping mode, compound liquid to be tested is added from a sample inlet in the upper end of the sample loading tube 1, and the compound liquid to be tested sequentially passes through the plurality of extraction units 2 to complete testing.

Specifically, as shown in fig. 1 and 2, the sealing structure includes an annular groove 7, an annular plate 8 fixed to the inner wall of the sleeve 5, and a third annular protrusion 9 disposed on the side surface of the annular plate 8 and capable of being inserted into the annular groove 7, the annular groove 7 is opened on the end surface of the sample outlet of the sample loading tube 1, the end surfaces of the two ends of the extraction unit 2, and the end surface of the sample inlet of the sample outlet tube 3, and an outer circumferential surface of the third annular protrusion 9 is provided with a sealing ring 10; the annular plate 8, the sleeve 5 and the third annular protrusion 9 are integrally formed, the cross sections of the annular groove 7 and the third annular protrusion 9 are rectangular, and the sleeve 5, the annular plate 8 and the third annular protrusion 9 are made of polyethylene or polypropylene, so that the light-transmitting sleeve has the characteristics of firmness, difficulty in breaking, moderate hardness, suitability for processing, good light transmission and the like; sealing ring 10 adopts the polytetrafluoroethylene ring, prevents to pollute the compound that awaits measuring to sealing ring 10 sets up and prevents that the compound that awaits measuring from overflowing from annular plate 8 on the protruding 9 outer circumferences of third annular, improves the utility model discloses a reliability.

In this embodiment, as shown in fig. 2, the opening edges of the annular groove 7 are provided with rounded corners 11, so that the third annular protrusion 9 can be inserted into the annular groove 7, and the sealing ring 10 can be prevented from being scratched.

In this embodiment, as shown in fig. 1, the inner diameter of the annular plate 8 is smaller than the diameters of the sample outlet of the sample loading tube 1, the port of the extraction unit 2, and the sample inlet of the sample outlet tube 3, so as to prevent the annular plate 8 from blocking the flow of the compound liquid to be tested.

In this embodiment, as shown in fig. 3, the cross-sectional shapes of the first annular protrusion 6 and the second annular protrusion 4 are semicircular, triangular or isosceles trapezoid. In this embodiment, a semicircular shape is adopted.

In this embodiment, the inner wall diameter of extraction unit 2 is the same with the inner wall diameter of last appearance pipe 1, has guaranteed that the volume of the effective adsorbent of extraction unit 2 satisfies the adsorption requirement, can not reduce the volume of adsorbent in every extraction unit 2 along with the increase of extraction unit 2 quantity, has guaranteed the utility model discloses a reliability.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.

Claims

1. A combined solid phase extraction column is characterized in that: including last appearance pipe, it has a plurality of extraction units, the last stage to go up appearance pipe appearance mouth and can establish ties extraction unit, the appearance mouth of extraction unit is provided with out appearance pipe, go up between appearance pipe and the extraction unit, adjacent extraction unit between and extract the unit and go out and all be provided with the sleeve between the appearance pipe, both ends all are provided with first annular arch in the sleeve, go up the lateral wall at appearance pipe lateral wall, extraction unit both ends and go out and all be provided with the second annular arch with the protruding looks joint of first annular on the appearance pipe lateral wall, the middle part is provided with seal structure in the sleeve.

2. The combined solid phase extraction column of claim 1, wherein: seal structure includes the annular groove, with the fixed annular slab of sleeve inner wall and set up on the annular slab side and can insert the annular groove in the third annular is protruding, the annular groove is seted up on sample tube appearance mouth terminal surface, extraction unit both ends terminal surface, appearance tube appearance mouth terminal surface, the protruding outer periphery of third annular is provided with the sealing ring.

3. The combined solid phase extraction column of claim 2, wherein: and the opening edge of the annular groove is provided with a fillet.

4. The combined solid phase extraction column of claim 2, wherein: the inner diameters of the annular plates are smaller than the diameters of the sample outlet of the upper sample tube, the ports of the extraction units and the sample inlet of the sample outlet tube.

5. The combined solid phase extraction column of claim 1, wherein: the cross sections of the first annular bulge and the second annular bulge are in a semicircular shape, a triangular shape or an isosceles trapezoid shape.

6. The combined solid phase extraction column of claim 1, wherein: the diameter of the inner wall of the extraction unit is the same as that of the inner wall of the sample loading pipe.