CN108152210B - Special electrochemiluminescence detection pool for screen printing electrode - Google Patents
Special electrochemiluminescence detection pool for screen printing electrode Download PDFInfo
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- CN108152210B CN108152210B CN201711189784.7A CN201711189784A CN108152210B CN 108152210 B CN108152210 B CN 108152210B CN 201711189784 A CN201711189784 A CN 201711189784A CN 108152210 B CN108152210 B CN 108152210B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
- G01N21/03—Cuvette constructions
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/75—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated
- G01N21/76—Chemiluminescence; Bioluminescence
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
- G01N27/28—Electrolytic cell components
- G01N27/30—Electrodes, e.g. test electrodes; Half-cells
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
- G01N27/28—Electrolytic cell components
- G01N27/30—Electrodes, e.g. test electrodes; Half-cells
- G01N27/308—Electrodes, e.g. test electrodes; Half-cells at least partially made of carbon
Abstract
The invention discloses an electrochemiluminescence detection pool special for a screen printing electrode, which comprises a reaction pool, a connecting plate and a bracket for fixing the reaction pool and the connecting plate, wherein the bracket is sleeved outside the reaction pool; the lead end of the screen printing electrode to be tested is fixed on the connecting plate, and the electrode end is folded into an L shape and suspended at the lower part of the connecting plate; when the lower part of the connecting plate is inserted into the bracket and fixed with the bracket, the electrode surface of the screen printing electrode completely extends into the reaction tank and is placed towards the light window. Because the electrode surface is arranged towards the optical window, all light generated by the luminescent substance on the surface of the electrode through electrochemical/chemical reaction is projected onto the detector through the optical window, and the signal response is large; and the screen printing electrode fixes the position of the screen printing electrode in the reaction tank through the bracket and the connecting plate, the conditions of unstable electrode fixation and position change can not occur in detection, the induction of an optical signal is stable, and the test error is small.
Description
Technical Field
The invention relates to an electrochemiluminescence detection device, in particular to an electrochemiluminescence detection cell special for a screen printing electrode.
Background
Electrochemiluminescence (ECL) is a chemiluminescence phenomenon directly or indirectly initiated by an electrochemical reaction, wherein a certain voltage or a certain current is applied to a system containing a chemiluminescent substance through an electrode, and a chemical reaction occurs between electrode products or between the electrode products and other added coexisting substances in the system to generate chemiluminescence, or the chemiluminescent substance directly undergoes an oxidation-reduction reaction on the electrode to generate an unstable intermediate substance which is decomposed to emit light. Is a product combining electrochemistry and chemiluminescence, and has the advantages of the electrochemistry and the chemiluminescence. The method has the advantages of simple and quick operation, high sensitivity, low detection limit, wide dynamic response range, good controllability and selectivity, easy realization of real-time and integration, and capability of carrying out in-situ detection. In recent years, the electrochemiluminescence technology is widely applied to food, medicine, environmental analysis and clinical diagnosis, and provides a powerful analysis method and means for trace level research.
At present, the electrochemiluminescence detector used in China is single, the detection window of the photomultiplier is arranged at the bottom of the luminescence detector, the design is such that during signal detection, the electrode needs to be perpendicular to the bottom and the reaction surface needs to be placed towards the optical window, and for the conventional columnar electrode (such as glassy carbon, gold, platinum and the like), the signal response is large (as shown in a figure 1). However, when ECL analysis is performed on a printed electrode (including a working electrode, a reference electrode, and a counter electrode) in a sheet shape, if the printed electrode is placed perpendicular to the bottom, the working electrode faces the side of the detector, and the light generated by electrochemical/chemical reaction on the electrode surface of the luminescent material cannot be projected onto the detector through the optical window, and the signal response is small (see b in fig. 1).
The reported method for ECL detection by using screen printing electrode includes β 2 microglobulin of hypersensitive immune-labeled ECL immunosensing detection established by Rizwan et al, a detection cell made of transparent glass is wrapped by a silver mirror film, the bottom is left to allow light to transmit, a printing electrode is vertically inserted into the detection cell, the method for converging light generated by electrochemical/chemical reaction on the surface of an electrode by using mirror reflection to an optical window is difficult to ensure that all light is projected on a detector at the bottom of the detection cell in a concentrated manner, the light has different losses, and the final signal response is greatly influenced.
Disclosure of Invention
The purpose of the invention is as follows: the invention provides a special electrochemiluminescence detection cell for a screen printing electrode, aiming at the problems of weak optical signal, unstable fixation during detection and the like when the conventional sheet-shaped printing electrode is used for ECL detection.
The technical scheme is as follows: the invention discloses an electroluminescent detection pool special for a screen printing electrode, which comprises a reaction pool, a connecting plate and a bracket for fixing the reaction pool and the connecting plate, wherein the bracket is sleeved outside the reaction pool; the lower part of the connecting plate is fixed with an L-shaped screen printing electrode to be tested, the screen printing electrode comprises a lead end and an electrode end which is folded into an L shape, wherein the lead end is fixed on the connecting plate, the electrode end is suspended at the lower part of the connecting plate, the electrode end comprises an electrode surface, and when the lower part of the connecting plate is inserted into the bracket and is fixed with the bracket, the electrode surface on the electrode end completely extends into the reaction tank and is placed towards the light window.
Because the electrode surface is arranged towards the optical window, all light generated by the luminescent substance on the surface of the electrode through electrochemical/chemical reaction is projected onto the detector through the optical window, and the signal response is large; and the screen printing electrode fixes the position of the screen printing electrode in the reaction tank through the bracket and the connecting plate, the conditions of unstable electrode fixation and position change can not occur in detection, the induction of an optical signal is stable, and the test error is small.
Preferably, the bracket is provided with a groove for the connection plate to be vertically inserted, and the groove is formed by vertically extending downwards from the top of the bracket. At this time, the connection plate is perpendicular to the holder, so that the electrode face of the L-shaped screen printing electrode faces the optical window, thereby enabling the optical signal to be detected to the maximum.
The lower part of the connecting plate can be provided with an electrode interface, and the lead end of the screen printing electrode can be inserted into the electrode interface and is fixed with the connecting plate. The electrode interface may be a USB interface.
The upper part of the connecting plate is also provided with three conducting rods which are respectively used for being connected with a counter electrode wire, a working electrode wire and a reference electrode wire of the electrochemiluminescence detector, and current can be transmitted to the electrode surface of the screen printing electrode during detection.
Preferably, the reaction tank is cylindrical, and the support is a hollow cylinder. The outer diameter of the reaction tank is slightly smaller than the inner diameter of the bracket, so that the reaction tank can be stably arranged in the bracket.
Wherein, the material of the bracket can be polytetrafluoroethylene. The reaction tank can be made of transparent quartz, so that the bottom of the reaction tank is transparent and light can penetrate through the reaction tank during detection.
The working principle is as follows: when the screen printing electrode is subjected to electrochemiluminescence detection, the connecting plate, the bracket and the reaction tank are assembled and placed above an optical window of the electrochemiluminescence detector, and at the moment, the electrode surface of the screen printing electrode completely extends into the reaction tank and is placed towards the optical window; and connecting the connecting plate with a counter electrode wire, a working electrode wire and a reference electrode wire in the electrochemiluminescence detector, and transmitting current to the counter electrode, the working electrode and the reference electrode on the electrode end of the screen printing electrode, so that the electrochemiluminescence signal of the screen printing electrode can be detected.
Has the advantages that: compared with the prior art, the invention has the advantages that: the electrochemiluminescence detection cell can enable the electrode surface of the screen printing electrode to be placed towards the optical window, and when the detection cell is placed above the optical window of an electrochemiluminescence detector for detection, all light generated by an electrochemiluminescence substance on the surface of the electrode through electrochemical/chemical reaction can be projected onto the detector through the optical window, so that the signal response is large; the screen printing electrode fixes the position of the screen printing electrode in the reaction tank through the support and the connecting plate, the conditions of unstable electrode fixation and position change cannot occur in detection, the induction of an optical signal is stable, and the test error is small. Moreover, the electrochemiluminescence detection cell is light and firm, is simple to assemble, is suitable for electrochemiluminescence sensing detection of all sheet-shaped printed electrodes, and has wide application prospects.
Drawings
FIG. 1 is an ECL intensity spectrum of different types of electrodes for detecting ruthenium terpyridine chloride with the same concentration by using different detection cells, wherein the spectra a, b and c are ECL intensity spectra of a columnar electrode for detecting by using a traditional detection cell, a screen-printed electrode for detecting by using a traditional detection cell and a screen-printed electrode for detecting by using the detection cell of the present invention, respectively;
FIG. 2 is an exploded view of an electrochemiluminescence detection cell of the present invention;
FIG. 3 is a diagram illustrating the use of an electrochemiluminescence detection cell according to the present invention;
fig. 4 is a schematic structural diagram of the screen printing electrode, wherein (a) is a normal structural diagram of the screen printing electrode, and (b) is a structural diagram of the screen printing electrode after being bent.
Detailed Description
The technical scheme of the invention is further explained by combining the attached drawings.
Referring to fig. 2 to 3, the electrochemiluminescence detection cell 100 specially used for the screen-printed electrode of the invention comprises a support 1, a reaction cell 2 and a connecting plate 3, wherein the reaction cell 2 is used for containing a detection solution, and the connecting plate 3 is used for fixing the screen-printed electrode 7, wherein the reaction cell 2 can be placed inside the support 1, and the connecting plate 3 can be inserted into the support 1, so that the positions of the reaction cell 2 and the connecting plate 3 can be fixed through the support 1.
A screen printing electrode 7 to be tested which is folded into an L shape is fixed at the lower part of the connecting plate 3, as shown in FIG. 4, the screen printing electrode 7 comprises a lead 71 and an electrode end 72, the lead end 71 is fixed on the connecting plate 3, the electrode end 72 is suspended at the lower part of the connecting plate 3 in an L shape, the electrode end 72 comprises an electrode surface, and the electrode surface comprises a counter electrode 12, a working electrode 13 and a reference electrode 14; when the lower part of the connection plate 3 is inserted into the holder 1 and fixed to the holder 1, the electrode face of the screen-printed electrode 7 can be completely inserted into the reaction cell 2 and placed toward the optical window 8 of the electrochemiluminescence detector 200. The light generated by electrochemical/chemical reaction of the luminescent material on the surface of the electrode is projected to the detector through the light window 8, and the signal response is large; moreover, the screen printing electrode 7 is fixed at the position in the reaction tank 2 through the bracket 1 and the connecting plate 3, the conditions of unstable electrode fixation and position change can not occur in detection, the induction of optical signals is stable, and the test error is small.
Wherein, the support 1 can be a hollow cylinder, such as a hollow cylinder, and at this time, the reaction tank 2 can be a cylinder, and the outer diameter thereof is slightly smaller than the inner diameter of the support 1, so as to be stable inside the support 1. The material of the bracket 1 can adopt polytetrafluoroethylene; the bottom of the reaction cell 2 is transparent to light, and may be made of transparent quartz material, for example, to ensure that light can penetrate the reaction cell 2 to irradiate the optical window 8 of the electrochemiluminescence detector 200 during electrochemiluminescence detection.
The connecting plate 3 can be directly inserted into the hollow cavity of the bracket 1 and fixed with the bracket 1, or a groove 6 can be formed on the bracket 1, and the connecting plate 3 can be inserted into the groove 6 and fixed with the bracket 1; the recess 6 may be formed to extend vertically downward from the top of the holder 1, and at this time, the connection plate 3 is inserted vertically into the holder 1 so that the electrode face of the L-shaped screen-printed electrode 7 faces the optical window 8, thereby allowing the optical signal to be detected to the maximum.
The height of the reaction tank 2 and the depth of the groove 6 are not particularly limited, and only by ensuring that when the connecting plate 3 is inserted into the groove 6, the groove 6 can fix the connecting plate 3 and the electrode surface of the screen printing electrode 7 can contact the detection liquid level in the reaction tank 2, generally speaking, the sum of the height of the reaction tank 2 and the depth of the groove 6 can be equal to the height of the bracket 1.
In order to facilitate the fixation of the screen-printed electrode 7 to the connection plate 3, an electrode interface 5 may be provided at the lower portion of the connection plate 3, the electrode interface 5 may be a USB interface, and the lead end 71 of the screen-printed electrode 7 is inserted into the electrode interface 5 to form the fixation.
The upper part of the connecting plate 3 can also be provided with three conductive rods 4 which are respectively used for being connected with a counter electrode wire 9, a working electrode wire 10 and a reference electrode wire 11 of the electrochemiluminescence detector 200; three conductive circuits are arranged inside the connecting plate 3 and used for electrically connecting the conductive rods 4 with the electrode interfaces 5, and when the three conductive rods 4 are respectively connected with the counter electrode line 9, the working electrode line 10 and the reference electrode line 11, current can be respectively transmitted to the counter electrode 12, the working electrode 13 and the reference electrode 14 on the electrode surface of the screen printing electrode 7.
The working principle is as follows: when the screen printing electrode is subjected to electrochemiluminescence detection, the electrode end 72 of the screen printing electrode 7 to be detected is folded into an L shape, referring to fig. 4(b), the lead end 71 is inserted into the electrode port 5, and the reaction cell 2, the connection plate 3 and the bracket 1 are assembled and then placed on the top of the optical window 8 of the electrochemiluminescence detector 200, at this time, the electrode surface of the screen printing electrode 7 completely extends into the reaction cell 2 and is placed towards the light window 8, referring to fig. 3, three conductive rods 4 on the connection plate 3 are respectively connected with a counter electrode line 9, a working electrode line 10 and a reference electrode line 11 in the electrochemiluminescence detector 200, the power of the electrochemiluminescence detector 200 is turned on, and current is transmitted to the counter electrode 12, the working electrode 13 and the reference electrode 14 of the electrode terminal 72 of the screen-printed electrode 7 through the conductive rods 4, so that the electrochemiluminescence signal of the screen-printed electrode 7 can be detected.
The electrochemiluminescence detection cell is light and firm, is simple to assemble, is suitable for electrochemiluminescence sensing detection of all sheet-shaped printed electrodes, and has wide application prospect.
Examples
The special electrochemiluminescence detection pool for the screen printing electrode in the embodiment comprises a cylindrical polytetrafluoroethylene support 1 (with the inner diameter of 2.3cm, the outer diameter of 5.2cm and the height of 2.5cm), a quartz reaction pool 2 (with the diameter of 2.2cm and the height of 1.5cm) and a connecting plate 3 fixed with a screen printing electrode 7, wherein the size of a groove 6 in the support 1 is 0.4cm in length, 0.1cm in width and 1cm in height, an electrode interface 5 is a USB interface, and the screen printing electrode 7 is a carbon printing electrode.
Placing a quartz reaction tank 2 in a polytetrafluoroethylene support 1, adding terpyridine ruthenium chloride into the reaction tank 2, and placing the reaction tank and the terpyridine ruthenium chloride together on the surface of an optical window 8 of an electrochemiluminescence detector 200; the electrode end 72 of the screen printing electrode 7 is folded into an L shape, the lead end 71 of the screen printing electrode is clamped into the electrode interface 5, then the connecting plate 3 is clamped into the groove 6, the electrode surfaces of three electrodes (a counter electrode 12, a working electrode 13 and a reference electrode 14) of the screen printing electrode 7 face the light window 8, and the three conductive rods 4 are respectively connected with the counter electrode wire 9, the working electrode wire 10 and the reference electrode wire 11 through the electrode wire clamping heads 15.
The electrochemiluminescence detection result is shown as a spectrum c in fig. 1, and the spectrum shows that the electrochemiluminescence detection result has a strong electrochemiluminescence signal.
Claims (5)
1. The special electrochemiluminescence detection pool for the screen printing electrode is characterized by comprising a reaction pool (2), a connecting plate (3) and a bracket (1) for fixing the reaction pool (2) and the connecting plate (3), wherein the bracket (1) is sleeved outside the reaction pool (2); an L-shaped screen printing electrode (7) to be tested is fixed at the lower part of the connecting plate (3), the screen printing electrode (7) comprises a lead end (71) and an L-shaped electrode end (72), the lead end (71) is fixed on the connecting plate (3), the electrode end (72) is suspended at the lower part of the connecting plate (3), and when the lower part of the connecting plate (3) is inserted into the bracket (1) and is fixed with the bracket (1), an electrode surface on the electrode end (72) completely extends into the reaction tank (2) and is placed towards an optical window of the electrochemiluminescence detector (200); the support (1) is provided with a groove (6) for the connection plate (3) to be vertically inserted, and the groove (6) is formed by vertically extending downwards from the top of the support (1); the lower part of the connecting plate (3) is provided with an electrode interface (5), and a lead end (71) of the screen printing electrode (7) is inserted into the electrode interface (5); the upper part of the connecting plate (3) is provided with three conducting rods (4) which are respectively used for being connected with a counter electrode wire (9), a working electrode wire (10) and a reference electrode wire (11) of the electrochemiluminescence detector (200).
2. The electrochemiluminescence detection cell dedicated to screen printed electrodes of claim 1, wherein the electrode interface (5) is a USB interface.
3. The electrochemiluminescence detection cell special for the screen-printed electrode according to claim 1, wherein the reaction cell (2) is cylindrical, and the support (1) is a hollow cylinder.
4. The electrochemiluminescence detection cell special for the screen-printed electrode according to claim 1, wherein the material of the support (1) is polytetrafluoroethylene.
5. The electrochemiluminescence detection cell dedicated to screen printed electrodes of claim 1, wherein the reaction cell (2) is made of transparent quartz.
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| CN201711189784.7A CN108152210B (en) | 2017-11-24 | 2017-11-24 | Special electrochemiluminescence detection pool for screen printing electrode |
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| CN201711189784.7A CN108152210B (en) | 2017-11-24 | 2017-11-24 | Special electrochemiluminescence detection pool for screen printing electrode |
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| CN108152210B true CN108152210B (en) | 2020-03-31 |
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| CN113030069B (en) * | 2021-02-01 | 2023-06-02 | 苏州易莱生物技术有限公司 | Electric field generating device for electrochemiluminescence detection apparatus |
Citations (5)
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| US6200531B1 (en) * | 1998-05-11 | 2001-03-13 | Igen International, Inc. | Apparatus for carrying out electrochemiluminescence test measurements |
| CN103091302A (en) * | 2012-12-27 | 2013-05-08 | 济南大学 | Preparation of ECL (electro chemical luminescence) DNA (Deoxyribose Nucleic Acid) sensor based on 3D paper chip, and application of sensor to simultaneous detection on Hg<2+> and Ag<+> |
| CN104330358A (en) * | 2014-11-04 | 2015-02-04 | 南京理工大学 | Micro-flow cell for detecting ECL (electrochemiluminescence) signal of printing electrode and application of micro-flow cell |
| CN105092564A (en) * | 2015-08-07 | 2015-11-25 | 南京理工大学 | ZnTCPP/TOAB light-emitting electrode, preparing method and application of electrode to light-emitting imaging platform |
| CN106546578A (en) * | 2016-10-28 | 2017-03-29 | 华南师范大学 | The gravity on content of wax dam/capillary flow cloth chip and its application in glucose sensing |
-
2017
- 2017-11-24 CN CN201711189784.7A patent/CN108152210B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6200531B1 (en) * | 1998-05-11 | 2001-03-13 | Igen International, Inc. | Apparatus for carrying out electrochemiluminescence test measurements |
| CN103091302A (en) * | 2012-12-27 | 2013-05-08 | 济南大学 | Preparation of ECL (electro chemical luminescence) DNA (Deoxyribose Nucleic Acid) sensor based on 3D paper chip, and application of sensor to simultaneous detection on Hg<2+> and Ag<+> |
| CN104330358A (en) * | 2014-11-04 | 2015-02-04 | 南京理工大学 | Micro-flow cell for detecting ECL (electrochemiluminescence) signal of printing electrode and application of micro-flow cell |
| CN105092564A (en) * | 2015-08-07 | 2015-11-25 | 南京理工大学 | ZnTCPP/TOAB light-emitting electrode, preparing method and application of electrode to light-emitting imaging platform |
| CN106546578A (en) * | 2016-10-28 | 2017-03-29 | 华南师范大学 | The gravity on content of wax dam/capillary flow cloth chip and its application in glucose sensing |
Non-Patent Citations (2)
| Title |
|---|
| Highly Stable ECL Active Films Formed by the Electrografting of a Diazotized Ruthenium Complex Generated in Situ from the Amine;David J. E. Piper 等;《Langmuir》;20101130;第27卷(第1期);第474–480页 * |
| 丝网印刷电极的电化学发光生物传感器;刘帅 等;《传感器与微系统》;20170505;第36卷(第5期);第1-5、15页 * |
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