CN109283281B - Chromatographic column - Google Patents
Chromatographic column Download PDFInfo
- Publication number
- CN109283281B CN109283281B CN201811198035.5A CN201811198035A CN109283281B CN 109283281 B CN109283281 B CN 109283281B CN 201811198035 A CN201811198035 A CN 201811198035A CN 109283281 B CN109283281 B CN 109283281B
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- Prior art keywords
- tube
- chromatographic
- damping
- column
- hollow
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- 238000013016 damping Methods 0.000 claims abstract description 102
- 238000004587 chromatography analysis Methods 0.000 claims abstract description 35
- 238000001035 drying Methods 0.000 claims description 14
- 238000001179 sorption measurement Methods 0.000 claims description 5
- 230000007423 decrease Effects 0.000 claims description 2
- 238000004458 analytical method Methods 0.000 abstract description 12
- 239000012491 analyte Substances 0.000 description 29
- 230000000694 effects Effects 0.000 description 6
- 238000007789 sealing Methods 0.000 description 4
- 238000000926 separation method Methods 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 239000012159 carrier gas Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
- G01N30/60—Construction of the column
- G01N30/6052—Construction of the column body
- G01N30/606—Construction of the column body with fluid access or exit ports
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Treatment Of Liquids With Adsorbents In General (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention provides a chromatographic column, which comprises a damping part and a hollow chromatographic tube, wherein the outer diameter of the damping part is smaller than the inner diameter of the chromatographic tube, and the damping part is arranged in a hollow pipeline of the chromatographic tube. Compared with the prior art, the chromatographic column provided by the invention solves the problems that the chromatographic column with a certain specification in the prior art can not well carry out accurate chromatographic analysis on the analytes with a small molecular structure and the existing chromatographic column has poor analysis results on the analytes with a small molecular structure.
Description
Technical Field
The invention relates to the field of chromatographic analysis, in particular to a chromatographic column.
Background
Chromatography is a separation analysis means, separation is the core, and thus the chromatographic column responsible for the separation is the heart of the chromatographic system. The chromatographic column consists of a column tube, a pressure cap, a clamping sleeve (sealing ring), a sieve plate (filter disc), a joint, a screw and the like. The column tube is made of stainless steel, or thick-wall glass or quartz tube, and the inner wall of the tube is required to have high smoothness. Because during chromatographic analysis, not only analytes with a large molecular structure but also analytes with a small molecular structure can be analyzed, the speeds of the large molecular structure and the small molecular structure passing through the chromatographic column are different due to different self masses. The chromatographic columns existing in the market at present are mostly chromatographic columns with certain specification, and cannot well carry out accurate chromatographic analysis on analytes with small molecular structures, so that the analysis results of the existing chromatographic columns on analytes with small molecular structures are poor. Therefore, there is a need in the market today to provide a chromatographic column that can perform accurate chromatographic analysis of analytes of small molecular structure.
Disclosure of Invention
The invention aims to solve the main technical problems of providing a chromatographic column capable of accurately carrying out chromatographic analysis on an analyte with a small molecular structure, so as to solve the problems that the chromatographic column with a certain specification in the prior art cannot well carry out accurate chromatographic analysis on the analyte with the small molecular structure and the analysis result is poor.
In order to solve the technical problems, the invention provides a chromatographic column which comprises a damping component and a hollow chromatographic tube, wherein the outer diameter of the damping component is smaller than the inner diameter of the chromatographic tube, and the damping component is arranged in a hollow pipeline of the chromatographic tube.
Further, the length of the damping member in the lengthwise extending direction is smaller than the length of the chromatographic tube in the lengthwise extending direction.
Further, the damping component comprises an upper port and a lower port; the chromatographic tube comprises an air inlet and an air outlet.
The upper port is level with the air inlet; or (b)
The lower port is flush with the air outlet; or (b)
The upper port is vertically lower than the air inlet and the lower port is vertically higher than the air outlet.
Further, seals are provided at the upper and lower ports.
Further, the damping member is laser welded into the hollow tube of the chromatographic column.
Further, the damping member includes a damping post or a hollow damping tube.
Further, the outer diameter of the damper post or the inner diameter of the damper tube decreases or increases in a direction away from the air intake.
Further, the outer wall of the damping column or the inner wall of the damping tube is provided with grains.
Further, a drying device is arranged at the air inlet.
Further, the drying device comprises a drying adsorption layer which is arranged on the inner wall of the hollow pipeline of the chromatographic tube.
The beneficial effects of the invention are as follows:
the invention provides a chromatographic column, which comprises a damping part and a hollow chromatographic tube, wherein the outer diameter of the damping part is smaller than the inner diameter of the chromatographic tube, and the damping part is sleeved in the hollow pipeline of the chromatographic tube. Compared with the prior art, the chromatographic column provided by the invention solves the problems that the chromatographic column with a certain specification in the prior art cannot well carry out accurate chromatographic analysis on analytes with small molecular structures and the analysis result is poor. Therefore, the chromatographic column provided by the invention has the advantages that the speed of the analyte passing through the chromatographic column is slowed down by arranging the damping part, so that the analyte with a small molecular structure can be accurately analyzed by chromatography.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some examples of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of a chromatographic column according to a first mode provided with a damping member according to an embodiment of the present invention;
FIG. 2 is a schematic view of a chromatographic column according to a second embodiment of the invention provided with a damping member;
fig. 3 is a schematic structural view of a chromatographic column provided with another damping member according to an embodiment of the present invention.
Reference numerals:
1. a chromatographic tube; 2. a damping member; 10. a drying device; 11. an air inlet; 12. an air outlet; 13. a hollow pipe; 21. an upper port; 22. a lower port; 23. and (5) lines.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the present invention, it should be noted that, the terms "upper", "inner", "bottom", and the like indicate an azimuth or a positional relationship based on the azimuth or the positional relationship shown in the drawings, or an azimuth or a positional relationship conventionally put in use of the inventive product, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or element to be referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus should not be construed as limiting the present invention, and, furthermore, the terms "first", "second", and the like are used only for distinguishing the description, and should not be construed as indicating or implying relative importance.
In the description of the present invention, it should also be noted that, unless explicitly stated and limited otherwise, the terms "disposed," "connected," and "connected" are to be construed broadly, such as: the connecting device can be fixedly connected, detachably connected or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
The invention will be described in further detail below with reference to the drawings by means of specific embodiments.
In order to solve the problems that the chromatographic column in the prior art is mostly a chromatographic column with a certain specification, cannot well carry out accurate chromatographic analysis on the analytes with a small molecular structure, and has poor analysis results on the analytes with the small molecular structure. The embodiment provides a chromatographic column, including damping part and hollow chromatographic tube, damping part's external diameter is less than the internal diameter of chromatographic tube, and damping part locates in the hollow pipeline of chromatographic tube.
Specifically, referring to fig. 1, 2 and 3, the chromatographic column provided in the present embodiment includes a chromatographic tube 1 and a damping member 2. When analyzing the analyte with a small molecular structure, the mass of the analyte with the small molecular structure is lighter, and the speed is too high when the analyte passes through the chromatographic tube 1, so that the analysis is incomplete, and finally the chromatographic analysis effect is poor. The damping component 2 is arranged in the chromatographic column provided by the embodiment, so that the speed of the analyte with a small molecular structure passing through the chromatographic tube 1 can be slowed down, and the chromatographic analysis result of the analyte with the small molecular structure is more accurate.
Further, referring to fig. 1, 2 and 3, the chromatographic tube 1 includes an air inlet 11 and an air outlet 12, and two ends of a hollow pipe 13 are respectively connected to the air inlet 11 and the air outlet 12. The damping member 2 comprises an upper port 21 and a lower port 22, and the damping member 2 is arranged in the hollow pipe 13 of the chromatographic column. Specifically, the damping member 2 may be sleeved in the hollow pipe 13 of the chromatographic tube 1 by welding or by laser connection, and the specific sleeving manner is not limited to the manner given in the embodiment, so long as the damping member 2 is disposed in the chromatographic tube 1.
It should be understood that, in order to make the damping member 2 disposed in the chromatographic tube 1, the cross section of the small molecular structure of the analyte flowing through the chromatographic tube 1 is reduced by reducing the outer diameter of the damping member 2 disposed in the chromatographic tube 1, so as to reduce the flow rate of the small molecular structure of the analyte flowing through the chromatographic tube 1, thereby reducing the speed of the analyte flowing through the chromatographic tube 1, and further making the chromatographic analysis result of the small molecular structure of the analyte more accurate. To achieve this better, the outer diameter of the damping member 2 needs to be smaller than the inner diameter of the hollow tube 13 of the chromatographic tube 1. Specifically, the size of the outer diameter of the damping member 2, the size of the inner diameter of the hollow tube 13 of the chromatographic tube 1, and the difference therebetween are not particularly limited in this embodiment as the case may be.
Further, the length of the damping member 2 in the length extension direction is smaller than the length of the chromatographic tube 1 in the length extension direction. Since the damping member 2 is disposed within the chromatographic tube 1, the damping member 2 serves to slow down the flow of the small molecular structure analyte through the chromatographic tube 1.
Specifically, as shown in fig. 1, 2 and 3, in the present embodiment, in the length extending direction of the chromatographic tube 1, the length of the damping member 2 is smaller than the length of the chromatographic tube 1, and the outer diameter of the damping member 2 needs to be smaller than the inner diameter of the hollow tube 13 of the chromatographic tube 1, so that the damping member 2 has a slowing effect on the speed of the flow of the analyte of the small molecular structure through the chromatographic tube 1, and the length of the damping member 2 is smaller than the difference between the lengths of the chromatographic tube 1 as the case may be, which is not particularly limited in the present embodiment.
Further, as shown in fig. 1, 2 and 3, the damping member 2 of the present embodiment includes an upper port 21 and a lower port 22, and the chromatographic tube 1 includes an air inlet 11 and an air outlet 12, and the upper port 21 is flush with the air inlet 11, or the lower port 22 is flush with the air outlet 12, or the upper port 21 is vertically lower than the air inlet 11, and the lower port 22 is vertically higher than the air outlet 12.
Specifically, as shown in fig. 1, since the length of the damping member 2 in the length extending direction should be set smaller than the length of the chromatographic tube 1 in the length extending direction, when the upper port 21 of the damping member 2 is flush with the air inlet 11, the damping member 2 is disposed at the upper section of the chromatographic tube 1, and the upper end surface of the damping member 2 is flush with the end surface of the chromatographic tube 1. As shown in fig. 1, the analyte with a small molecular structure can slowly enter the column of the chromatographic tube 1 and then quickly flow out, so that a better analysis effect can be obtained.
Specifically, as shown in fig. 2, when the lower port 22 of the damping component 2 is flush with the air outlet 12, the damping component 2 is disposed at the lower section of the chromatographic tube 1, and the bottom end surface of the damping component 2 is flush with the end surface of the chromatographic tube 1, so that the analyte with a small molecular structure can quickly enter the column of the chromatographic tube 1 and slowly flow out, and a better analysis effect can be obtained.
In addition, when the upper port 21 of the damping member 2 is vertically lower than the air inlet 11 and the lower port 22 is vertically higher than the air outlet 12, the damping member 2 is disposed at the middle section of the chromatographic tube 1 (a schematic is not shown in this embodiment). It should be noted that, no matter the damping member 2 is disposed at the upper section, the lower section or the middle section of the chromatographic tube 1, the damping member 2 does not affect the speed of the small molecular structure to be analyzed flowing through the chromatographic tube 1, so the position of the damping member 2 disposed in the chromatographic tube 1 can be selected according to the actual requirement, which is not limited in this embodiment.
Further, in the present embodiment, seals (not shown in the drawings) are provided at the upper port 21 and the lower port 22 of the damping member 2. In order to ensure reliability of the results of the chromatographic analysis, in use, seals should also be provided at the upper and lower ports 21, 22 to ensure tightness within the chromatographic tube 1. In particular, the sealing member may be a sealing gasket, or may be another component having a sealing function, which is not specifically limited in this embodiment.
Further, the damping member 2 is laser welded into the hollow tube 13 of the chromatographic tube 1. In the prior art, the damping member 2 is generally disposed in the chromatographic tube 1 by laser welding, but the present invention is not limited to the laser welding method described in the present embodiment, and the present invention is not limited to this, as the case may be.
Referring to fig. 2, in the present embodiment, a drying device 10 is disposed at an air inlet 11 of the chromatographic tube 1, the drying device 10 includes a drying adsorption layer disposed on a wall of a hollow tube 13. In order to avoid that part of the pollutants in the gasified carrier gas is doped into the chromatographic column and influences the accuracy of the chromatographic analysis result of the analyte, a drying device 10 is required to be arranged at the air inlet 11.
Specifically, the drying device 10 may be a drying adsorption layer, and the drying adsorption layer is disposed on a wall of the hollow pipe 13, so as to perform a drying purification treatment on the gasified carrier gas, and improve the chromatographic analysis accuracy of the analyte.
Further, the damping member 2 includes a damping tube or a damping column. Referring to fig. 3, fig. 3 is a schematic structural diagram of a damping member 2 as a damping column. The damping part 2 is used for reducing the speed of the flow of the analyte with a small molecular structure through the chromatographic tube 1, so that the analyte with the small molecular structure can be better subjected to chromatographic analysis, and the result is more accurate.
Specifically, the damping component 2 can be a damping tube or a damping column, and the damping component 2 does not influence the speed of the small molecular structure to-be-analyzed object flowing through the chromatographic tube 1 to play a role in slowing down. Therefore, the structure and type of the damping member 2 may be selected according to actual needs, which is not particularly limited in this embodiment.
In one embodiment of the invention, as shown in fig. 2, the damping member 2 is a damping column or tube. Specifically, when the outer diameter of the damping column or the inner diameter of the damping tube is reduced along the direction away from the air inlet 11 and chromatographic analysis is performed, when the analyte is required to pass through the chromatographic tube 1 at a fast speed and a slow speed, the outer diameter of the damping column or the inner diameter of the damping tube can be reduced along the direction away from the air inlet 11, so that the analyte can quickly enter the tubular column of the chromatographic tube 1 and slowly flow out, and the analysis effect is better.
Further, as shown in fig. 1, in another embodiment of the present invention, the damping member 2 is a damping column or a damping tube. Specifically, when the outer diameter of the damping column or the inner diameter of the damping tube is increased along the direction away from the air inlet 11 and chromatographic analysis is performed, when the analyte is required to pass through the chromatographic tube 1 slowly and then quickly, the outer diameter of the damping column or the inner diameter of the damping tube can be increased along the direction away from the air inlet 11, so that the analyte can slowly enter the tubular column of the chromatographic tube 1 a little bit and then flow out faster, and the analysis effect is better.
As shown in fig. 1 and 2, in the present embodiment, the inner wall of the damping member 2 is provided with a grain 23. The damping member 2 is used to reduce the speed of the small molecular structure analyte flowing through the chromatographic tube 1, so that the small molecular structure analyte can be better subjected to chromatographic analysis, and the result is more accurate. When the speed of the small molecular structure to be analyzed flowing through the chromatographic tube 1 needs to be further reduced, and a chromatographic analysis result with higher accuracy is obtained, lines 23 can be arranged on the inner wall of the damping part 2, the specific lines 23 can be frosted lines and the like, and the speed of the small molecular structure to be analyzed flowing through the chromatographic tube 1 is further reduced, so that the chromatographic analysis accuracy is higher.
The invention provides a chromatographic column, which comprises a damping part and a hollow chromatographic tube, wherein the outer diameter of the damping part is smaller than the inner diameter of the chromatographic tube, and the damping part is sleeved in the hollow pipeline of the chromatographic tube. Compared with the prior art, the chromatographic column provided by the invention can solve the problems that the chromatographic column with a certain specification in the prior art cannot well carry out accurate chromatographic analysis on analytes with small molecular structures and the analysis result is poor. Therefore, the chromatographic column provided by the invention can slow down the speed of the analyte passing through the chromatographic column by arranging the damping part, so that the analyte with a small molecular structure can be accurately analyzed by chromatography.
The foregoing is a further detailed description of the invention in connection with specific embodiments, and it is not intended that the invention be limited to such description. It will be apparent to those skilled in the art that several simple deductions or substitutions may be made without departing from the spirit of the invention, and these should be considered to be within the scope of the invention.
Claims (8)
1. The chromatographic column is characterized by comprising a damping part and a hollow chromatographic tube, wherein the outer diameter of the damping part is smaller than the inner diameter of the chromatographic tube, the damping part is arranged in a hollow pipeline of the chromatographic tube, and the damping part comprises an upper port and a lower port; the chromatographic tube comprises an air inlet and an air outlet, the damping component comprises a damping column or a hollow damping tube, and the outer diameter of the damping column or the inner diameter of the damping tube decreases or increases along a direction away from the air inlet.
2. The chromatography column of claim 1, wherein the damping member has a length along the length extension of the chromatography tube that is less than the length of the chromatography tube.
3. The chromatography column of claim 1, wherein said upper port is flush with said air inlet; or (b)
The lower port is flush with the air outlet; or (b)
The upper port is lower than the air inlet and the lower port is higher than the air outlet in a direction extending along the length of the chromatographic tube.
4. A chromatography column according to claim 3, wherein seals are provided at the upper and lower ports.
5. The chromatography column of claim 1, wherein the damping member is laser welded into the hollow conduit of the chromatography tube.
6. The chromatography column of claim 1, wherein the outer wall of the damping column or the inner wall of the damping tube is provided with a texture.
7. A chromatographic column in accordance with claim 3 or 4 wherein a drying means is provided at the inlet.
8. The chromatography column of claim 7, wherein the drying means comprises a dry adsorption layer disposed on an inner wall of the hollow tube of the chromatography tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811198035.5A CN109283281B (en) | 2018-10-15 | 2018-10-15 | Chromatographic column |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811198035.5A CN109283281B (en) | 2018-10-15 | 2018-10-15 | Chromatographic column |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109283281A CN109283281A (en) | 2019-01-29 |
| CN109283281B true CN109283281B (en) | 2023-11-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811198035.5A Active CN109283281B (en) | 2018-10-15 | 2018-10-15 | Chromatographic column |
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| Publication number | Publication date |
|---|---|
| CN109283281A (en) | 2019-01-29 |
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