CN201145683Y - Ultraviolet visible thin layer spectroelectrochemical detection cell - Google Patents

Abstract

The utility model provides an ultraviolet-visible thin-layer spectroelectrochemical detection cell; it comprises a detection cell main body composed of a pair of interlocking organic plates and a diaphragm interposed therebetween. There is a U-shaped opening on the body to form a sheet-shaped detection pool connected to the liquid storage pool. The grid-shaped light-transmitting electrode is arranged in the detection pool, and its lead wires pass upward through the sealing plug on the liquid storage pool. Exhaust pipe; the two side walls of the organic plate located at the U-shaped opening are provided with openings, and the openings are glued with quartz glass sheets; the two sides of the upper part of the liquid storage pool are interspersed with reference electrodes and counter electrodes; the bottom of the detection pool is set There is a drain line with a valve down through the cell body. The detection cell not only has obvious advantages such as easy alignment of the optical path, adjustable thickness of the thin layer, and good oxygen removal effect, but also expands the application range of the thin-layer spectroelectrochemical detection cell, which can also be used in the ultraviolet region, and can be disassembled more convenient.

Description

Ultraviolet visible thin layer spectroelectrochemical detection cell

technical field

The utility model relates to the fields of electrochemical analysis and optical analysis, in particular to the design and manufacture of an ultraviolet-visible thin-layer spectroelectrochemical detection cell.

Background technique

The core problem of spectroelectrochemical research is the spectroelectrochemical detection cell. The design, processing, installation and disassembly of spectroelectrochemical detection cells occupy most of the time in spectroelectrochemical experiments, and the performance of spectroelectrochemical detection cells is directly related to the success or failure of spectroelectrochemical experiments. Although various spectroelectrochemical detection cells have been reported, there are still many difficulties in spectroelectrochemical detection cells, which largely limit the promotion of spectroelectrochemical, an important method, in the field of electrochemical research. The most prominent of these difficulties are: alignment of light path from optics; electrolysis efficiency of self-electrochemistry; oxygen removal. ;Disassembly problem. National Invention Patent (Application No.: 200710008411.5, Publication No.: CN101000323) discloses the manufacturing process of a thin-layer spectroelectrochemical detection cell entitled "A Thin-Layer Spectroelectrochemical Detection Cell". Alignment, thin layer thickness can be adjusted, good oxygen removal effect and other obvious advantages, but there are also disadvantages. The light-transmitting window is made of plexiglass material, which has obvious absorption of ultraviolet light, so its application is limited. In addition, the reference electrode, counter electrode and working electrode are all fixed on the sealing plug, which also causes some difficulties in the disassembly and assembly of the detection cell.

Contents of the invention

The purpose of this utility model is to provide an ultraviolet-visible thin-layer spectroelectrochemical detection cell, which not only has the obvious advantages of easy alignment of the optical path, adjustable thin-layer thickness, and good oxygen removal effect, but also expands the thin-layer spectrum. The application range of the electrochemical detection cell can also be applied in the ultraviolet region, and the disassembly and assembly are more convenient.

The ultraviolet-visible thin-layer spectroelectrochemical detection cell of the utility model comprises a detection cell main body composed of a pair of interlocking organic plates and a diaphragm sandwiched between the two organic plates. With the cavity of the liquid storage pool for placing the test liquid, a U-shaped thin layer opening is opened on the diaphragm body at the lower part of the main body of the detection cell to form a sheet-shaped spectroelectrochemical detection cell connected with the liquid storage pool. A grid-shaped light-transmitting electrode is arranged in the chemical detection pool, and its lead wire passes upward through the sealing plug on the upper opening of the liquid storage pool. It is characterized in that: the sealing plug is also provided with an inert gas inlet pipe and an exhaust pipe. The air inlet pipe extends into the test liquid; the organic plate is located at the opening of the U-shaped thin layer, and the two side walls are provided with openings for installing glued quartz glass sheets, and the openings are glued with quartz glass sheets as light-transmitting window, so that visible light and ultraviolet light can pass through the detection cell; the two sides of the upper part of the liquid reservoir are interspersed with a reference electrode and a counter electrode, and the reference electrode and the counter electrode extend into the test solution; the spectroelectrochemical detection cell The bottom is provided with a drain pipe with a valve that goes down through the main body of the detection cell.

The two organic plates are symmetrical to each other with a diaphragm therebetween; the two organic plates are fixedly connected by locking bolts pierced on the periphery.

The quartz glass sheet and the organic plate are fixed and sealed with epoxy resin, and the surface of the quartz glass sheet is flat with the inner surface of the organic plate; the organic plate is an organic glass plate, polytetrafluoroethylene or plastic plate.

The remarkable advantage of the utility model is that the middle part of a pair of interlocking organic plates is cut through and a quartz glass sheet is embedded in the inner side as a light-transmitting window, and the embedded quartz glass sheet is sealed and fixed with epoxy resin to ensure its The surface is flat with the surface of the organic plate, thus overcoming the shortcoming of the organic glass in absorbing light in the ultraviolet region, and expanding the application range of the thin-layer spectroelectrochemical detection cell. The reference electrode and counter electrode are respectively inserted into the detection cell from both sides, and the lead wire of the working electrode is inserted from the center of the sealing plug and passes through the liquid reservoir to contact with the platinum mesh working electrode at the contact port. In this way, the disassembly and assembly of the detection cell is more convenient.

Description of drawings

Fig. 1 is a schematic front sectional view of the detection cell of the present invention.

Fig. 2 is a schematic side view of the detection cell of the present invention.

Fig. 3 is a perspective view of the detection cell of the present invention.

In the figure 1. Organic plate, 2. Film, 3. Quartz glass sheet, 4. Platinum mesh working electrode, 5. Valve, 6. Drain pipe, 7. Screw, 8. Thin layer, 9. Liquid storage tank, 10 .Counter electrode inlet, 11. Counter electrode, 12. Inert gas outlet pipe, 13. Working electrode lead wire, 14. Inert gas inlet pipe, 15. Sealing plug, 16. Reference electrode, 17. Reference electrode inlet, 18. The working electrode leads are in contact with the platinum mesh working electrode.

Detailed ways

Elaborate the manufacture process of the present utility model in detail in conjunction with embodiment:

Example

Dig a groove with the same depth as the thickness of the quartz glass sheet (3) in the middle of a pair of plexiglass plates (1) with a thickness of about 1 cm, and cut through the middle of the groove, insert the quartz glass sheet into the groove and ensure that the quartz glass The sheet is even with the surface of the plexiglass plate, fixed it with epoxy resin and filled the gap. Take a PVC film (2) with a thickness of about 0.2mm of an appropriate size, clamp it between the pair of plexiglass plates, take six screws (7) and insert them evenly around the plexiglass to clamp it to form the detection pool. main body. Drill a liquid storage tank (9) with a diameter of about 1.5 cm and a depth of about 2.0 cm at the upper end of the main body, a sealing plug (15) is arranged at the mouth of the pool, and the working electrode lead wire (13) and the inert gas inlet pipe (14) and outlet The trachea (12) is all fixed on the sealing plug, and a small hole about 2 mm deep is drilled in the center of the pool bottom as the contact port (18) of the platinum mesh working electrode (4) and the working electrode lead wire (13). A rectangular channel of suitable size is cut out in the diaphragm to communicate with the liquid reservoir as a thin layer (8), and a platinum mesh working electrode is placed in it. Drill an aperture about 3mm in the center of the lower end of the main body to communicate with the thin layer, and bury a drain pipe (6) with an outer diameter of about 3mm, and set a valve (5) on the drain pipe. A reference electrode inlet (17) and a counter electrode inlet (10) are respectively drilled at the height of the liquid reservoirs on both sides of the main body, and are respectively used to place the reference electrode (16) and the counter electrode (11).

Claims (5)

1. An ultraviolet-visible thin-layer spectroelectrochemical detection cell comprises a detection cell body composed of a pair of interlocking organic plates and a diaphragm sandwiched between the two organic plates, and the central part of the detection cell body top is provided with a useful With the cavity of the liquid storage pool for placing the test liquid, a U-shaped thin layer opening is opened on the diaphragm body at the lower part of the main body of the detection cell to form a sheet-shaped spectroelectrochemical detection cell connected with the liquid storage pool. A grid-shaped light-transmitting electrode is arranged in the chemical detection pool, and its lead wire passes upward through the sealing plug on the upper opening of the liquid storage pool. It is characterized in that: the sealing plug is also provided with an inert gas inlet pipe and an exhaust pipe. The air inlet pipe extends into the test liquid; the organic plate is located at the opening of the U-shaped thin layer, and the two side walls are provided with openings for installing glued quartz glass sheets, and the openings are glued with quartz glass sheets as light-transmitting The window allows visible light and ultraviolet light to pass through the detection cell; the upper two sides of the liquid reservoir are interspersed with a reference electrode and a counter electrode, and the reference electrode and the counter electrode extend into the test solution; the bottom of the spectroelectrochemical detection cell A drain tube with a valve is provided down through the body of the test cell. 2. The ultraviolet-visible thin-layer spectroelectrochemical detection cell according to claim 1, characterized in that: the two organic plates are symmetrical to each other with a diaphragm therebetween. 3. The ultraviolet-visible thin-layer spectroelectrochemical detection cell according to claim 1 or 2, characterized in that: the two organic plates are fixedly connected by locking bolts pierced on the periphery. 4. The ultraviolet-visible thin-layer spectroelectrochemical detection cell according to claim 1, characterized in that: the quartz glass sheet and the organic plate are fixed and sealed with epoxy resin, and the surface of the quartz glass sheet and the inside of the organic plate The surface is flat. 5. The ultraviolet-visible thin-layer spectroelectrochemical detection cell according to claim 1, characterized in that: the organic plate is an organic glass plate, polytetrafluoroethylene or plastic plate.

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