CN220154339U - Biological detection flowing electrolytic cell - Google Patents
Biological detection flowing electrolytic cell Download PDFInfo
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- CN220154339U CN220154339U CN202321502713.9U CN202321502713U CN220154339U CN 220154339 U CN220154339 U CN 220154339U CN 202321502713 U CN202321502713 U CN 202321502713U CN 220154339 U CN220154339 U CN 220154339U
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Abstract
The utility model belongs to the technical field of medicine development and detection, and particularly relates to a biological detection flow electrolytic cell. The utility model comprises an electrolytic cell, a liquid level control device, a reference electrode, a counter electrode, a detection electrode and at least one solution storage tank; the electrolytic cell comprises a shell, wherein the bottom surface of the shell is provided with an optical window sheet, at least one overflow port and a liquid leakage port, the liquid leakage port is connected with a liquid outlet pipe, and the overflow port is connected with a liquid inlet pipe; the electrolytic cell is provided with a structure for introducing an electrode; the liquid level control device comprises a waste liquid overflow pipe and a waste liquid discharge pipe; the liquid outlet pipe is communicated with the waste liquid overflow pipe through a hose; the solution storage tank is communicated with the liquid inlet pipe through a hose; the reference electrode, the counter electrode and the detection electrode are respectively communicated with the electrolytic cell through structures for introducing the electrodes. The utility model has the advantages of simpler installation, debugging and use, simpler fault elimination, higher degree of freedom of position adjustment of the detection electrode and good application prospect.
Description
Technical Field
The utility model belongs to the technical field of medicine development and detection, and particularly relates to a biological detection flow electrolytic cell.
Background
The life phenomenon includes a number of electrochemical problems, and thus, electrochemical analysis methods have important applications in the development and detection of biological medicine. Bioelectrodes (i.e., sensors) that sense enzymes, immunity, microorganisms, cells, DNA, RNA, proteins, smell, taste, and body fluid components are often designed in the study of biological medicine, and the study of biological medicine-related subjects is achieved. Raman spectroscopy is also an important fingerprint characterization technology in the fields of biological medicine and the like, and can detect intermediates, products and the like of biochemical reactions. Therefore, a technique combining electrochemistry and raman spectroscopy is an important subject in the art.
In the combined technology of electrochemistry and raman spectroscopy, the most important difficulty is in controlling the liquid layer on the electrode surface. In the detection process of raman spectrum, visible light needs to be emitted to the surface of an electrode, and scattered signals are collected. Although the absorption of visible light by aqueous solutions is small, if the solution layer is too thick, the signal loss is also serious, especially in confocal microscopy systems, too thick optical window or solution layer can cause the optical path of the microscopy system to change, reducing the collection efficiency of the surface raman signal by a multiple. On the other hand, too thin a layer of solution can lead to difficulties in mass transfer of the materials in the solution, making it difficult for reactants in the solution to reach the electrode surface, and for products on the electrode surface to diffuse away from the electrode surface. This causes the chemical environment of the electrode surface to change continuously as the test time progresses. This problem poses a serious obstacle to the study of the biomedical field with a large number of reactions and a complex process. For this reason, the combined electrochemical and raman spectroscopy techniques are currently less applicable to the study in the biomedical field.
One of the ideas for solving the contradiction between the thickness of the solution layer is a flowing electrolytic cell, and the idea is to make the solution flow on the premise of keeping the solution layer on the surface of the electrode thin (ensuring the acquisition quality of the Raman spectrum), and solve the difficulty of mass transfer by using the flowing solution. A typical flow cell for Raman spectroscopy is shown in China patent No. CN201511033833.9, a thin layer flow cell suitable for electrochemical in situ Raman spectroscopy. However, the existing electrochemical in-situ raman spectrum flow electrolytic cells mostly adopt a sealing structure, and the principle is that a hollow gasket with a certain thickness is used for separating an optical window and an electrode, so that a solution flows in the hollow part of the gasket and flows over the surface of the electrode. The sealing structure has extremely high requirements on the processing precision of each part of the device, otherwise, the problems of liquid leakage, air leakage and the like are easy to occur. In addition, the sealing structure is complex to install, and once liquid leakage and air leakage occur, the sealing structure needs to be detached and reinstalled for a long time to check. In addition, because the electrode is sealed by the gasket, the gasket is often inadvertently contacted with the electrode surface, and the electrode is contaminated or deposits on the electrode are destroyed. In a word, the use process of the Raman spectrum flow electrolytic cell with the sealing structure is very complicated and inconvenient. There is a need in the art to develop raman spectroscopy flow cells of different configurations and principles that provide more options for researchers in the field.
Disclosure of Invention
Aiming at the problems in the prior art, the utility model provides a biological detection flow electrolytic cell and aims at providing a Raman spectrum flow electrolytic cell in a non-sealing mode.
A biological detection flow electrolytic cell comprises an electrolytic cell, a liquid level control device, a reference electrode, a counter electrode, a detection electrode and at least one solution storage tank;
the electrolytic cell comprises a shell, wherein an optical window sheet, at least one overflow port and a liquid leakage port are arranged on the bottom surface of the shell, the liquid leakage port is connected with a liquid outlet pipe, and the overflow port is connected with a liquid inlet pipe; a structure for introducing an electrode is arranged in the electrolytic cell;
the liquid level control device comprises a waste liquid overflow pipe and a waste liquid discharge pipe; the liquid outlet pipe is communicated with the waste liquid overflow pipe through a hose;
the solution storage tank is communicated with the liquid inlet pipe through a hose;
the reference electrode, the counter electrode and the detection electrode are respectively communicated with the electrolytic cell through structures for introducing electrodes.
Preferably, the device further comprises a bracket, and the electrolytic cell, the liquid level control device, the reference electrode, the counter electrode and the solution storage tank are respectively and fixedly arranged on the bracket.
Preferably, the overflow ports and the liquid leakage ports are uniformly distributed on the side surface of the optical window sheet.
Preferably, the structure for introducing the electrode includes a connection port for connecting the detection electrode, and an axis of the connection port and a center of the optical window are on the same line.
Preferably, the structure for introducing the electrode comprises a counter electrode liquid contact tube, an outlet of the counter electrode liquid contact tube is positioned in the shell, the outlet of the counter electrode liquid contact tube is vertically downward, and the vertical distance between the outlet of the counter electrode liquid contact tube and the bottom surface of the shell is 0.05-1mm.
Preferably, the counter electrode and the counter electrode liquid contact tube are communicated through a hose.
Preferably, the structure for introducing the electrode comprises a reference electrode liquid contact tube, an outlet of the reference electrode liquid contact tube is positioned in the shell, the outlet of the reference electrode liquid contact tube is vertically downward, and the vertical distance between the outlet of the reference electrode liquid contact tube and the optical window sheet is 0.05-1mm.
Preferably, the reference electrode and the reference electrode liquid contact tube are communicated through a hose.
Preferably, an air inlet pipe is arranged in the electrolytic cell, an outlet of the air inlet pipe is positioned in the shell, and an outlet direction of the air inlet pipe faces the optical window sheet.
Preferably, the upper part or the side surface of the electrolytic cell is also provided with an air outlet.
The utility model provides a Raman spectrum flow electrolytic cell with an open structure (non-sealing structure), which can be used for adjusting the height of liquid in the electrolytic cell in aspects by utilizing the electrolytic cell and a liquid level control device which are mutually communicated, so as to adjust the thickness of a solution layer, thereby meeting the detection requirement of Raman spectrum. Meanwhile, the structure of the utility model realizes the flow of the solution in the detection process so as to meet the mass transfer requirement of biochemical reaction. Compared with the devices with the same type of sealing structures in the prior art, the device provided by the utility model is simpler to install, debug and use, easier to remove faults (such as liquid leakage) and higher in freedom degree of adjustable position of the detection electrode. Therefore, the method has good application prospect in the Raman spectrum and electrochemistry related research of biological medicine.
It should be apparent that, in light of the foregoing, various modifications, substitutions and alterations can be made herein without departing from the spirit and scope of the utility model as defined by the appended claims.
The above-described aspects of the present utility model will be described in further detail below with reference to specific embodiments in the form of examples. It should not be understood that the scope of the above subject matter of the present utility model is limited to the following examples only. All techniques implemented based on the above description of the utility model are within the scope of the utility model.
Drawings
Fig. 1 is a schematic overall structure of embodiment 1.
FIG. 2 is a top view of the electrolytic cell with the upper portion omitted;
FIG. 3 is a cross-sectional view of the electrolytic cell taken along the plane of FIG. 2 A-A';
FIG. 4 is a cross-sectional view of the electrolytic cell taken along the plane of FIG. 2B-B';
FIG. 5 is a cross-sectional view of the electrolytic cell taken along the plane of FIG. 2C-C';
FIG. 6 is a schematic view of the structure of the liquid level control apparatus;
FIG. 7 is a schematic diagram showing the positional relationship between a droplet-type single crystal electrode and the solution level in example 1;
FIG. 8 is a schematic diagram showing the positional relationship between the encapsulated electrode and the solution level in example 1.
1-electrolytic cell, 101-shell, 1011-connector, 102-optical window, 103-liquid outlet pipe, 104-liquid inlet pipe, 105-gas inlet pipe, 106-counter electrode liquid contact pipe, 107-reference electrode liquid contact pipe, 2-liquid level control device, 201-waste liquid overflow pipe, 202-waste liquid drain pipe, 3-bracket, 4-solution storage tank, 5-reference electrode, 6-counter electrode, 7-detection electrode, 701-electrode material and 702-sealing shell.
Detailed Description
Example 1
This embodiment provides a biological detection flow cell, as shown in fig. 1-6, comprising an electrolytic cell 1, a liquid level control device 2, a solution storage tank 4, a reference electrode 5 and a counter electrode 6.
The electrolytic cell 1 comprises a shell 101, wherein an optical window 102, at least one overflow port and a liquid leakage port are arranged on the bottom surface of the shell 101, the liquid leakage port is connected with a liquid outlet pipe 103, and the overflow port is connected with a liquid inlet pipe 104. The overflow and drain openings are evenly distributed on the sides of the optical window 102. In this embodiment, the number of overflow ports is three, and the number of corresponding liquid inlet pipes 104 is three, so that three different solutions can be introduced into the electrolytic cell 1 in an overflow manner, so as to meet the requirements of switching or mixing the solutions in the test. Each liquid inlet pipe 104 is connected with one solution storage tank 4 through a hose respectively, and the flow rate of the solution flowing out of the solution storage tank 4 can be controlled through a peristaltic pump or the opening of a valve at the outlet of the solution storage tank 4.
The liquid level control device 2 comprises a waste liquid overflow pipe 201 and a waste liquid discharge pipe 202; the liquid outlet pipe 103 and the waste liquid overflow pipe 201 are communicated through a hose. When the electrochemical is performed, the electrolytic cell 1 and the liquid level control device 2 form a communicating vessel through the hose, and the height of the liquid level of the solution in the electrolytic cell 1 (namely, the thickness of the solution layer) can be controlled by adjusting the height of the liquid level control device 2. The control accuracy of the conventional optical elevating table and other devices is high enough to control the height of the liquid level control device 2, and the thickness of the solution layer in the electrolytic cell 1 can be controlled within 1mm.
The electrolytic cell 1 is provided with a structure for introducing electrodes, and a common three-electrode detection system needs to introduce a detection electrode 7, a reference electrode 5 and a counter electrode 6 into the electrolytic cell 1.
The structure for introducing the electrode includes a connection port 1011 for connecting the detection electrode 7, and the axis of the connection port 1011 and the center of the optical window 102 are on the same line. In conventional detection, the detection electrode 7 may extend directly into the electrolytic cell 1 through the connection port 1011 until the detection electrode 7 surface just contacts the solution. At this time, only a solution layer smaller than 1mm is provided from the surface of the detection electrode 7 to the surface of the optical window 102, so that the requirements of raman spectrum detection can be satisfied. Meanwhile, the solution is continuously added through the overflow port, and is continuously discharged through the liquid leakage port, so that the solution in the solution layer continuously flows, and the mass transfer requirement of biochemical reaction can be met. As a preferable mode, when it is necessary to control the atmosphere in the electrolytic cell 1, the detection electrode 7 and the connection port 1011 can be sealed.
In this embodiment, since an open structure is adopted, extrusion and sealing by a sealing member are not needed, so that the distance between the detection electrode 7 and the optical window 102 is more freely adjusted, and the control can be flexibly performed according to the form or structure of the detection electrode 7. For example, in a preferred embodiment, the detection electrode 7 is a droplet type (bead type) single crystal electrode, and the droplet type single crystal electrode is characterized by a hemispherical shape, a hemispherical plane being a single crystal surface, and a spherical surface being a non-single crystal surface. In the study, researchers were generally concerned only with the reactions that occur on the single crystal planes. However, when a hemispherical plane (single crystal face) is contacted with a solution, hemispherical spherical surfaces (non-single crystal faces) are always likely to contact the solution due to infiltration or the like of the solution, thereby generating a signal that interferes with detection. In this case, the solution is to slightly raise the drop-type monocrystal electrode, and pull a "meniscus" above the liquid surface of the solution by the action of the surface tension of the liquid (as shown in fig. 7), so that the spherical surface of the side surface is hardly contacted with the solution, and the interference signal generated by the spherical surface is almost negligible. In other embodiments, the detection electrode 7 is a packaged electrode, and the structure of the detection electrode includes an electrode material 701 and a sealing shell 702 wrapped on the side surface of the electrode material, so that the detection electrode 7 can directly control the electrode surface to be level with the solution surface (as shown in fig. 8) because the problem of water drop type single crystal electrode side interference signals does not exist. The degree of freedom in controlling the height of the detection electrode 7 cannot be achieved in the conventional sealed raman spectrum flow cell.
The structure for introducing the electrode comprises a counter electrode liquid contact tube 106, wherein an outlet of the counter electrode liquid contact tube 106 is positioned in the shell 101, the outlet of the counter electrode liquid contact tube 106 is vertically and downwards arranged, and the vertical distance between the outlet of the counter electrode liquid contact tube 106 and the bottom surface of the shell 101 is 0.05-1mm. The electrode assembly further comprises a counter electrode 6, and the counter electrode 6 is a glass tube with two open ends, and the side surface of the glass tube is provided with a noble metal wire or a noble metal sheet in a penetrating way. One end of the glass tube is communicated with the counter electrode liquid contact tube 106 through a hose, and the other end is provided with a valve. In the detection, the glass tube and the counter electrode liquid contact tube 106 are filled with the electrolyte solution, and the electrolyte solution in the counter electrode liquid contact tube 106 is made to communicate with the solution layer in the electrolytic cell at the outlet, that is, the communication of the detection electrode 7 with the counter electrode is achieved.
The structure for introducing the electrode comprises a reference electrode liquid contact tube 107, wherein the outlet of the reference electrode liquid contact tube 107 is positioned in the shell 101, the outlet of the reference electrode liquid contact tube 107 is vertically downward, and the vertical distance between the outlet of the reference electrode liquid contact tube 107 and the optical window sheet 102 is 0.05-1mm. The structure of the reference electrode 5 can adopt any reference electrode in the prior art, the reference electrode 5 is communicated with the reference electrode liquid contact tube 107 through a hose, and the electrolyte solution in the reference electrode liquid contact tube 107 is communicated with the solution layer in the electrolytic cell at an outlet, namely the communication between the detection electrode 7 and the reference electrode 5 is realized.
When the gas atmosphere in the electrolytic cell 1 needs to be controlled, an air inlet pipe 105 is arranged in the electrolytic cell 1, the outlet of the air inlet pipe 105 is positioned in the shell 101, and the outlet direction of the air inlet pipe 105 faces the optical window sheet 102. In order to balance the gas pressure, the upper part or the side surface of the electrolytic cell 1 is also provided with a structure for discharging gas. Specifically, when the detection electrode 7 and the connection port 1011 are not sealed, the gas may be directly discharged through the connection port 1011; when the detection electrode 7 and the connection port 1011 are sealed, an air outlet or an air outlet pipe is additionally arranged on the shell 101 of the electrolytic cell 1.
In the device of the embodiment, the shell 101 of the electrolytic cell 1 is made of glass, so that the interior of the electrolytic cell 1 can be conveniently observed; the optical window 102 may be selected from existing raman detection windows, such as quartz windows; the cooperation between the quartz window and the glass housing 101 may be done by a glass lamp worker technique, or may be done by bonding and sealing the two with a hot melt adhesive. The hose for connecting the parts is made of polytetrafluoroethylene so as to reduce pollution of the solution.
According to the embodiment, the utility model constructs the Raman spectrum flow electrolytic cell, and the requirements of Raman spectrum detection and biochemical reaction mass transfer are met. Compared with the devices with the same type of sealing structures in the prior art, the device has the advantages of being simpler to install, debug and use, simpler to remove faults (such as liquid leakage), and higher in freedom degree of adjustable position of the detection electrode. Therefore, the utility model has good application prospect in the Raman spectrum and electrochemistry related research of biological medicine.
Claims (10)
1. A biological detection flow cell, characterized in that: comprises an electrolytic cell (1), a liquid level control device (2), a reference electrode (5), a counter electrode (6), a detection electrode (7) and at least one solution storage tank (4);
the electrolytic cell (1) comprises a shell (101), wherein an optical window (102), at least one overflow port and a liquid leakage port are arranged on the bottom surface of the shell (101), the liquid leakage port is connected with a liquid outlet pipe (103), and the overflow port is connected with a liquid inlet pipe (104); a structure for introducing electrodes is arranged in the electrolytic cell (1);
the liquid level control device (2) comprises a waste liquid overflow pipe (201) and a waste liquid discharge pipe (202); the liquid outlet pipe (103) is communicated with the waste liquid overflow pipe (201) through a hose;
the solution storage tank (4) is communicated with the liquid inlet pipe (104) through a hose;
the reference electrode (5), the counter electrode (6) and the detection electrode (7) are respectively communicated with the electrolytic cell (1) through structures for introducing electrodes.
2. The bioassay flow cell as set forth in claim 1, wherein: the device comprises an electrolytic cell (1), a liquid level control device (2), a reference electrode (5), a counter electrode (6) and a solution storage tank (4), and is characterized by further comprising a support (3), wherein the electrolytic cell, the liquid level control device (2), the reference electrode (5), the counter electrode (6) and the solution storage tank (4) are fixedly arranged on the support (3) respectively.
3. The bioassay flow cell as set forth in claim 1, wherein: the overflow and drain openings are uniformly distributed on the sides of the optical window (102).
4. The bioassay flow cell as set forth in claim 1, wherein: the structure for introducing the electrode comprises a connection port (1011) for connecting the detection electrode (7), and the axis of the connection port (1011) and the center of the optical window (102) are on the same straight line.
5. The bioassay flow cell as set forth in claim 1, wherein: the structure for introducing the electrode comprises a counter electrode liquid contact tube (106), wherein an outlet of the counter electrode liquid contact tube (106) is positioned in the shell (101), the outlet of the counter electrode liquid contact tube (106) is vertically downwards arranged, and the vertical distance between the outlet of the counter electrode liquid contact tube (106) and the bottom surface of the shell (101) is 0.05-1mm.
6. The bioassay flow cell as set forth in claim 5, wherein: the counter electrode (6) and the counter electrode liquid contact tube (106) are communicated through a hose.
7. The bioassay flow cell as set forth in claim 1, wherein: the structure for introducing the electrode comprises a reference electrode liquid contact tube (107), wherein an outlet of the reference electrode liquid contact tube (107) is positioned in the shell (101), the outlet of the reference electrode liquid contact tube (107) is vertically downwards arranged, and the vertical distance between the outlet of the reference electrode liquid contact tube (107) and the optical window (102) is 0.05-1mm.
8. The bioassay flow cell as set forth in claim 7, wherein: the reference electrode (5) and the reference electrode liquid contact tube (107) are communicated through a hose.
9. The bioassay flow cell as set forth in claim 1, wherein: an air inlet pipe (105) is arranged in the electrolytic cell (1), an outlet of the air inlet pipe (105) is positioned in the shell (101), and the outlet direction of the air inlet pipe (105) faces the optical window sheet (102).
10. The biological testing flow cell of claim 9, wherein: the upper part or the side surface of the electrolytic cell (1) is also provided with an air outlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321502713.9U CN220154339U (en) | 2023-06-13 | 2023-06-13 | Biological detection flowing electrolytic cell |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202321502713.9U CN220154339U (en) | 2023-06-13 | 2023-06-13 | Biological detection flowing electrolytic cell |
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| CN220154339U true CN220154339U (en) | 2023-12-08 |
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| CN202321502713.9U Active CN220154339U (en) | 2023-06-13 | 2023-06-13 | Biological detection flowing electrolytic cell |
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| CN (1) | CN220154339U (en) |
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