Device for removing bubbles in pipeline at front end of chromatographic column

Abstract

The utility model relates to the technical field of ion chromatographs, in particular to a bubble removing device for a pipeline at the front end of a chromatographic column, which comprises a first block body and a second block body arranged corresponding to the first block body, a breathable layer is arranged between the first block body and the second block body, a gas path is arranged on the first block body, and the second block body is arranged on the gas path. A gas path is arranged on the first block body, a gas inlet and a gas outlet are formed in the two ends of the gas path respectively, a liquid path communicated with the gas path is arranged on the second block body, a liquid inlet and a liquid outlet are formed in the two ends of the liquid path, and a gas inlet cavity communicated with the gas inlet and a gas outlet cavity communicated with the gas outlet are formed in the outer vertical face of the first block body. A liquid inlet cavity communicated with the liquid inlet hole and a liquid outlet cavity communicated with the liquid outlet hole are formed in the outer vertical face of the second block body. The bubble eliminating effect is obvious, and the operation stability of the instrument is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to ion chromatograph technical field especially a kind of chromatographic column front end pipeline bubble removal device. BACKGROUND

[0002] Ion chromatograph is a kind of high performance liquid chromatography, mainly used for the analysis of environmental samples, including ground water, drinking water, rainwater, domestic sewage and industrial wastewater etc..It is based on ion exchange resin, suitable for the separation of hydrophilic anion and cation, such as F-, Cl-, NO3- and Li+, Na+, K+ anion and cation separation and determination.Ion chromatograph has the advantages of good separation effect, high sensitivity, simple operation, and has a wide application in environment, food, medicine, biology, chemical industry and other fields.

[0003] When ion chromatography analysis is carried out, eluent is essential, which is used for washing and diluting sample, and adjusting solution concentration and PH value in ion chromatograph.The eluent required by ion chromatograph needs to be prepared by using deaerated ultrapure water, and if pure water is not completely deaerated, bubbles will enter the system, stay in front of chromatographic column, cause the pressure in the system to drop, and peak time to delay or be unstable. SUMMARY

[0004] In view of the above-mentioned deficiencies of the prior art, a chromatographic column front end pipeline bubble removal device is provided, which has obvious bubble elimination effect and improves the stability of instrument operation.

[0005] To solve the above technical problems, the technical scheme adopted by the utility model is a chromatographic column front end pipeline bubble removal device, which comprises a first block, a second block arranged correspondingly with the first block, a gas-permeable layer arranged between the first block and the second block, a gas path arranged on the first block, an air inlet hole and an air outlet hole arranged at both ends of the gas path, a liquid path arranged on the second block and communicated with the gas path, an inlet liquid hole and an outlet liquid hole arranged at both ends of the liquid path, an air inlet cavity communicated with the air inlet hole and an air outlet cavity communicated with the air outlet hole arranged on the outer surface of the first block, and an inlet liquid cavity communicated with the inlet liquid hole and an outlet liquid cavity communicated with the outlet liquid hole arranged on the outer surface of the second block.

[0006] The chromatographic column front end pipeline bubble removal device further comprises a shell for wrapping the first block and the second block, and the shell is provided with hole positions corresponding to the air inlet cavity, the air outlet cavity, the inlet liquid cavity and the outlet liquid cavity.

[0007] The chromatographic column front end pipeline bubble removal device has the first block and the second block made of polytetrafluoroethylene.

[0008] The chromatographic column front end pipeline bubble removal device has the gas-permeable layer made of waterproof gas-permeable film.

[0009] The beneficial effect of the utility model discloses a chromatographic column front end pipeline bubble removal device is, before the eluent enters the system, first by the liquid inlet cavity through the liquid inlet hole into the liquid path, then by the liquid outlet hole intercommunication liquid outlet cavity discharges, in this process, the bubble in the eluent enters the gas path through the air permeable layer, after the bubble enters the gas path, through the drive of the gas into the air inlet cavity, through the air outlet cavity intercommunication air outlet hole discharges. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 It is the structure schematic drawing of the utility model;

[0011] Figure 2 It is the bottom view of the first block;

[0012] Figure 3 It is the top view of the second block;

[0013] Figure 4 It is the structure schematic drawing of the shell.

[0014] In the drawing: 1, the first block;2, the second block;3, the air permeable layer;4, the gas path;5, the air inlet hole;6, the air outlet hole;7, the liquid path;8, the liquid inlet hole;9, the liquid outlet hole;10, the air inlet cavity;11, the air outlet cavity;12, the liquid inlet cavity;13, the liquid outlet cavity;14, the shell;15, the hole position. DETAILED DESCRIPTION

[0015] The utility model will be described in detail below in combination with the drawings and specific embodiment.

[0016] As Figures 1-4 Shown, a kind of chromatographic column front end pipeline bubble removal device, including first block 1, and the second block 2 of corresponding arrangement with first block 1, the material of the first block 1 and the second block 2 is polytetrafluoroethylene. Gas permeable layer 3 is equipped between the first block 1 and the second block 2, gas path 4 is equipped on the first block 1, air inlet hole 5 and air outlet hole 6 are respectively equipped at the both ends of gas path 4, liquid path 7 corresponding with gas path 4 is equipped on the second block 2, liquid inlet hole 8 and liquid outlet hole 9 are equipped at the both ends of liquid path 7, air inlet cavity 10 for being connected with the air inlet pipe of outside with air inlet hole 5 intercommunication on the outer facade of the first block 1, and air outlet cavity 11 with air outlet hole 6 intercommunication, the air inlet cavity 10 is used to be connected with the liquid delivery pipe of conveying eluent, the liquid outlet cavity 13 for being connected with the output pipe of the output of eluent with liquid inlet hole 8 intercommunication on the outer facade of the second block 2. The liquid inlet cavity 12 for being connected with the liquid delivery pipe of conveying eluent, the liquid outlet cavity 13 for being connected with the output pipe of the output of eluent.

[0017] Before the eluent enters the system, the eluent enters the liquid path through the liquid inlet hole in the liquid inlet cavity, and then is discharged from the liquid outlet cavity connected with the liquid outlet hole. In this process, the gas bubbles in the eluent enter the gas path through the gas permeable layer. After the gas bubbles enter the gas path, they are driven by the gas entering the gas inlet cavity and discharged from the gas outlet cavity connected with the gas outlet hole. This avoids the gas bubbles entering the system and staying in front of the chromatographic column, which causes the pressure in the system to drop, the peak time to delay or be unstable. The bubble elimination effect is obvious, and the stability of the instrument operation is improved.

[0018] Further comprising a shell 14 for wrapping the first block 1 and the second block 2, and the shell 14 is provided with hole positions 15 corresponding to the gas inlet cavity 10, the gas outlet cavity 11, the liquid inlet cavity 12 and the liquid outlet cavity 13 respectively. The utility model can work by pressing the first block 1, the gas permeable layer 3 and the second block 2, or can work by fixing the first block 1, the gas permeable layer 3 and the second block 2 through the shell 14.

[0019] The gas permeable layer 3 is a waterproof gas permeable film. The waterproof gas permeable film (breathable paper) is a new type of high polymer waterproof material. Its working principle is that the spacing between gas molecules is large, and it can pass through the gas permeable hole of the waterproof gas permeable film in the diffusion process. The spacing between liquid molecules is smaller than the spacing of the gas permeable hole, and under the action of surface tension, the liquid molecules cannot pass through the waterproof gas permeable film, that is, the waterproof effect is achieved.

[0020] Of course, the above description is not a limitation of the utility model, and the utility model is not limited to the above examples. Changes, modifications, additions or replacements made by ordinary skilled in the art within the essential scope of the utility model should also be within the protection scope of the utility model.

Claims

1. A bubble removal device for the front end tubing of a chromatographic column, characterized in that: The first block and the second block are arranged correspondingly, and a gas-permeable layer is arranged between the first block and the second block; a gas channel is arranged on the first block, and an air inlet and an air outlet are arranged at two ends of the gas channel; a liquid channel is arranged on the second block and communicates with the gas channel, and a liquid inlet and a liquid outlet are arranged at two ends of the liquid channel; an air inlet cavity communicating with the air inlet and an air outlet cavity communicating with the air outlet are arranged on the outer surface of the first block; and a liquid inlet cavity communicating with the liquid inlet and a liquid outlet cavity communicating with the liquid outlet are arranged on the outer surface of the second block.

2. A bubble removal device for a pre-column line of a chromatographic column according to claim 1, characterized in that The first block and the second block are wrapped by a shell, and the shell is provided with hole positions corresponding to the air inlet cavity, the air outlet cavity, the liquid inlet cavity and the liquid outlet cavity.

3. A bubble removal device for a pre-column line of a chromatographic column according to claim 2, characterized in that The first block and the second block are made of polytetrafluoroethylene.

4. A bubble removal device for a pre-column line of a chromatographic column according to claim 3, characterized in that The gas-permeable layer is a waterproof and gas-permeable film.

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