Electrode plate, electrochemical sensor and electrochemical workstation

Abstract

The utility model discloses an electrode plate, an electrochemical sensor and an electrochemical workstation. The electrode plate comprises a substrate, a first contact reaction layer and a second contact reaction layer; the substrate comprises a first surface and a second surface which are oppositely arranged; the first contact reaction layer is located on the first surface and comprises a working electrode, a counter electrode and a reference electrode; the second contact reaction layer is located on the second surface and comprises a working electrode, a counter electrode and a reference electrode; the first contact reaction layer and the second contact reaction layer are in mirror symmetry and are electrically connected. The utility model provides an electrode plate, an electrochemical sensor and an electrochemical workstation. The detection precision can still be improved under the conditions that the concentration of a detected solution is small and the volume is small.

Description

TECHNICAL FIELD

[0001] The utility model relates to detection technical field especially relates to a kind of electrode sheet, electrochemical sensor and electrochemical workstation. BACKGROUND

[0002] Electrochemical sensor is used to determine the electrical and electrochemical properties of target molecules or substances, so as to carry out qualitative and quantitative analysis and measurement, the basic theory and technical development of electrochemical sensor are closely related to electroanalytical chemistry, with the continuous updating of microelectronics and material processing technology, electrochemical sensor develops towards miniaturization and intelligentization, has obvious advantages of portability and low cost in heavy metal detection, especially in response to heavy metal accidents, on-site monitoring can be carried out, and its use and maintenance cost is relatively low.

[0003] The existing electrochemical sensor electrode is generally composed of working electrode, reference electrode and counter electrode, the working electrode of electrochemical sensor is fixed with certain chemical active substance, and relevant test is carried out through electrochemical reaction with test solution.

[0004] However, the existing electrochemical sensor can only detect the performance of the test solution when the solution concentration of the test solution is large and the volume is large, and there is a large detection error when the solution concentration is small or the volume is small. UTILITY MODEL CONTENT

[0005] The utility model provides a kind of electrode sheet, electrochemical sensor and electrochemical workstation, still can improve detection precision under the condition that the solution concentration of measured solution is small and volume is less.

[0006] According to an aspect of the utility model, an electrode sheet is provided, which includes: a substrate, a first contact reaction layer and a second contact reaction layer.

[0007] The substrate includes a first surface and a second surface arranged opposite to each other.

[0008] The first contact reaction layer is located on the first surface, and the first contact reaction layer includes a working electrode, a counter electrode and a reference electrode.

[0009] The second contact reaction layer is located on the second surface, and the second contact reaction layer includes a working electrode, a counter electrode and a reference electrode.

[0010] Optionally, the electrode sheet provided in the embodiment further includes a first insulating layer and a second insulating layer.

[0011] The first insulation layer is located on a side of the first contact reaction layer away from the substrate, and exposes working ends and conductive ends of the first contact reaction layer;

[0012] The second insulation layer is located on a side of the second contact reaction layer away from the substrate, and exposes working ends and conductive ends of the second contact reaction layer.

[0013] Optionally, the electrode sheet provided by the embodiment further comprises a first connecting layer, a second connecting layer and a third connecting layer located on a third surface of the substrate; the third surface is adjacent to both the first surface and the second surface;

[0014] The first connecting layer is used for electrically connecting working electrodes in the first contact reaction layer and working electrodes in the second contact reaction layer;

[0015] The second connecting layer is used for electrically connecting counter electrodes in the first contact reaction layer and counter electrodes in the second contact reaction layer;

[0016] The third connecting layer is used for electrically connecting reference electrodes in the first contact reaction layer and reference electrodes in the second contact reaction layer.

[0017] Optionally, the working electrode in the first contact reaction layer comprises a working sub-electrode, a first conductive electrode and a second conductive electrode connected in sequence;

[0018] The counter electrode in the first contact reaction layer comprises a counter sub-electrode, a third conductive electrode and a fourth conductive electrode connected in sequence;

[0019] The reference electrode in the first contact reaction layer comprises a reference sub-electrode, a fifth conductive electrode and a sixth conductive electrode connected in sequence;

[0020] The counter sub-electrode is arranged around the periphery of the working sub-electrode;

[0021] The working sub-electrode, the counter sub-electrode and the reference sub-electrode are working ends of the first contact reaction layer, and the second conductive electrode, the fourth conductive electrode and the sixth conductive electrode are conductive ends of the first contact reaction layer.

[0022] Optionally, the width of the first conductive electrode, the width of the third conductive electrode and the width of the fifth conductive electrode are equal;

[0023] The width of the second conductive electrode, the width of the fourth conductive electrode and the width of the sixth conductive electrode are equal;

[0024] The width of the second conductive electrode is greater than the width of the first conductive electrode.

[0025] Optionally, a vertical projection of the working sub-electrode on the substrate is circular.

[0026] Optionally, the first insulating layer and the second insulating layer are mirror-symmetrical.

[0027] Optionally, the thickness of the first conductive electrode, the thickness of the second conductive electrode, the thickness of the third conductive electrode, the thickness of the fourth conductive electrode, the thickness of the fifth conductive electrode and the thickness of the sixth conductive electrode are all 5-15 μm.

[0028] According to another aspect of the present application, an electrochemical sensor is provided, which comprises the electrode sheet provided in any of the embodiments of the present application.

[0029] According to another aspect of the present application, an electrochemical workstation is provided, which comprises the electrochemical sensor provided in any of the embodiments of the present application.

[0030] The present embodiment provides an electrode sheet, which comprises a substrate, a first contact reaction layer on a first surface of the substrate and a second contact reaction layer on a second surface of the substrate. The first surface and the second surface are oppositely arranged. The first contact reaction layer comprises a working electrode, a counter electrode and a reference electrode, and the first contact reaction layer and the second contact reaction layer are mirror-symmetrical and electrically connected. The present embodiment arranges the first contact reaction layer and the second contact reaction layer on the first surface and the second surface of the substrate respectively, and the first contact reaction layer and the second contact reaction layer are mirror-symmetrical. When the electrode sheet is immersed in a measured solution, the first contact reaction layer and the second contact reaction layer are both in contact with the measured solution. Compared with the electrode sheet with only one contact reaction layer arranged on one side, the electrode sheet provided in the present embodiment can increase the contact area between the working end of the electrode sheet and the measured solution without changing the area of the substrate. In the case of low concentration of the measured solution, the detection accuracy can still be ensured. In summary, the electrode sheet provided in the present embodiment can improve the detection accuracy even in the case of low concentration and small volume of the measured solution.

[0031] It should be understood that the content described in this part is not intended to identify key or important features of the embodiments of the present application, nor is it used to limit the scope of the present application. Other features of the present application will become apparent from the following description. BRIEF DESCRIPTION OF DRAWINGS

[0032] In order to more clearly illustrate the technical scheme in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0033] Figure 1 is a front structure schematic diagram of an electrode sheet according to the embodiment of the present application;

[0034] Figure 2 is a back structure schematic diagram of an electrode sheet according to the embodiment of the present application;

[0035] Figure 3 is a front structure schematic diagram of another electrode sheet according to the embodiment of the present application;

[0036] Figure 4 is a back structure schematic diagram of another electrode sheet according to the embodiment of the present application;

[0037] Figure 5 is a front structure schematic diagram of an electrode sheet according to the embodiment of the present application. DETAILED DESCRIPTION

[0038] In order to make the person skilled in the art better understand the present application, the following will combine the drawings in the embodiments of the present application to clearly and completely describe the technical scheme in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor should belong to the scope of protection of the present application.

[0039] It should be noted that the terms "first", "second" and the like in the specification and claims of the present application and the above drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0040] Figure 1It is a front structure schematic diagram of an electrode sheet according to the embodiment of the utility model, Figure 2 It is a back structure schematic diagram of an electrode sheet according to the embodiment of the utility model, reference Figure 1 And Figure 2 The electrode sheet provided by the embodiment includes: a substrate 110, a first contact reaction layer 120 (reference Figure 1 ) and a second contact reaction layer 130 (reference Figure 2 ), the substrate 110 includes oppositely arranged first surface S1 and second surface S2; the first contact reaction layer 120 is located on the first surface S1, and the first contact reaction layer 120 includes working electrode 121, counter electrode 122 and reference electrode 123; the second contact reaction layer 130 is located on the second surface S2, and the second contact reaction layer 130 includes working electrode 121, counter electrode 122 and reference electrode 123; the first contact reaction layer 120 and the second contact reaction layer 130 are mirror-symmetric and electrically connected.

[0041] Specifically, the front of the electrode sheet can be the first surface, and the back of the electrode sheet can be the second surface, and the electrode sheet in the embodiment can be used to detect the content of lead ions, mercury ions, arsenic ions, chromium ions, selenium ions and cadmium ions in food.

[0042] The first contact reaction layer 120 and the second contact reaction layer 130 are mirror-symmetric, that is, the structure of the first contact reaction layer 120 is exactly the same as that of the second contact reaction layer 130, and the substrate 110 is provided with a working electrode 121, a counter electrode 122 and a reference electrode 123 on the first surface S1 and the second surface S2. The materials and thicknesses of the corresponding structures of the first contact reaction layer 120 and the second contact reaction layer 130 are also the same.

[0043] When using the electrode sheet provided by the embodiment to detect the performance of the tested solution, the working end of the electrode sheet can be immersed in the tested solution, because the front and back of the electrode sheet are respectively provided with the first contact reaction layer 120 and the second contact reaction layer 130, when the working end of the electrode sheet is immersed in the tested solution, the first contact reaction layer 120 and the second contact reaction layer 130 are in contact with the tested solution, which can increase the contact area of the electrode sheet and the tested solution and improve the effect during enrichment. When the area of the electrode sheet is limited, the contact reaction layers on the front and back can be in contact with the tested solution, so that the detection accuracy can be improved and the detection error can be reduced even in the case of low solution concentration.

[0044] The electrode sheet provided by the embodiment comprises a substrate, a first contact reaction layer located on a first surface of the substrate, and a second contact reaction layer located on a second surface of the substrate. The first surface is oppositely arranged with the second surface. The first contact reaction layer comprises a working electrode, a counter electrode and a reference electrode, and the first contact reaction layer is mirror-symmetrically and electrically connected with the second contact reaction layer. The first contact reaction layer and the second contact reaction layer are respectively arranged on the first surface and the second surface of the substrate, and the first contact reaction layer and the second contact reaction layer are mirror-symmetrically arranged. When the electrode sheet is immersed in a measured solution, the first contact reaction layer and the second contact reaction layer are both in contact with the measured solution. Compared with the electrode sheet with only one contact reaction layer arranged on one side, the electrode sheet provided by the embodiment can increase the contact area between the working end of the electrode sheet and the measured solution without changing the area of the substrate, and can ensure the detection accuracy in the case that the concentration of the measured solution is low. In conclusion, the electrode sheet provided by the embodiment can improve the detection accuracy in the case that the concentration of the measured solution is low and the volume of the measured solution is small.

[0045] Optionally, Figure 3 is a front view of another electrode sheet according to an embodiment of the present application, Figure 4 is a back view of another electrode sheet according to an embodiment of the present application, with reference to Figure 3 and Figure 4 The electrode sheet provided by the embodiment further comprises a first insulating layer 140 and a second insulating layer 150. The first insulating layer 140 is located on the side of the first contact reaction layer 120 away from the substrate 110, and the first insulating layer 140 exposes the working end 124 and the conductive end 125 of the first contact reaction layer 120. The second insulating layer 150 is located on the side of the second contact reaction layer 130 away from the substrate 110, and the second insulating layer 150 exposes the working end 124 and the conductive end 125 of the second contact reaction layer 130.

[0046] Specifically, when testing the solution, the working end 124 of the first contact reaction layer 120 and the working end 124 of the second contact reaction layer 130 are in contact with the measured solution. The first insulating layer 140 and the second insulating layer 150 can both be a green oil layer. The first insulating layer 140 and the second insulating layer 150 can be used to protect the conductive part of the first contact reaction layer 120 and the second contact reaction layer 130 from being corroded by the solution, etc.

[0047] Optionally, Figure 5 is a front view of an electrode sheet according to an embodiment of the present application, with reference to Figure 5The electrode sheet provided by the embodiment further comprises a first connecting layer 160, a second connecting layer 170 and a third connecting layer 180 located on the third surface S3 of the substrate 110; the third surface S3 is adjacent to the first surface and the second surface; the first connecting layer 160 is used to electrically connect the working electrode 121 in the first contact reaction layer 120 and the working electrode 121 in the second contact reaction layer 130; the second connecting layer 170 is used to electrically connect the counter electrode 122 in the first contact reaction layer 120 and the counter electrode 122 in the second contact reaction layer 130; and the third connecting layer 180 is used to electrically connect the reference electrode 123 in the first contact reaction layer 120 and the reference electrode 123 in the second contact reaction layer 130.

[0048] Specifically, the working electrode 121, the counter electrode 122 and the reference electrode 123 in the first contact reaction layer 120 are spaced apart along the first direction X, and the first direction X is parallel to the third surface S3. The thickness and the material of the first connecting layer 160, the second connecting layer 170 and the third connecting layer 180 can be the same, and the first connecting layer 160, the second connecting layer 170 and the third connecting layer 180 can improve the signal transmission effect.

[0049] Optionally, continuing to refer to Figure 1 The working electrode 121 in the first contact reaction layer 120 comprises a working sub-electrode 1211, a first conductive electrode 1212 and a second conductive electrode 1213 connected in sequence; the counter electrode 122 in the first contact reaction layer 120 comprises a counter sub-electrode 1221, a third conductive electrode 1222 and a fourth conductive electrode 1223 connected in sequence; and the reference electrode 123 in the first contact reaction layer 120 comprises a reference sub-electrode 1231, a fifth conductive electrode 1232 and a sixth conductive electrode 1233 connected in sequence; the counter sub-electrode 1221 is arranged around the periphery of the working sub-electrode 1211; the working sub-electrode 1211, the counter sub-electrode 1221 and the reference sub-electrode 1231 are the working end of the first contact reaction layer 120, and the second conductive electrode 1213, the fourth conductive electrode 1231 and the sixth conductive electrode 1233 are the conductive end of the first contact reaction layer 120.

[0050] Since the first contact reaction layer 120 and the second contact reaction layer 130 are mirror-symmetric, similarly, the working electrode in the second contact reaction layer also comprises a working sub-electrode, a first conductive electrode and a second conductive electrode connected in sequence; the counter electrode in the second contact reaction layer also comprises a counter sub-electrode, a third conductive electrode and a fourth conductive electrode connected in sequence; and the reference electrode in the second contact reaction layer also comprises a reference sub-electrode, a fifth conductive electrode and a sixth conductive electrode connected in sequence; the counter sub-electrode is arranged around the periphery of the working sub-electrode.

[0051] Specifically, the width of the counter sub-electrode 1221 can be equal to the width of the reference sub-electrode 1231. For example, the width of the counter sub-electrode 1221 can be 0.45 mm.

[0052] The first insulating layer covers the first conductive electrode, the third conductive electrode and the fifth conductive electrode in the first contact reaction layer 120. The second insulating layer covers the first conductive electrode, the third conductive electrode and the fifth conductive electrode in the second contact reaction layer 130. When the electrode sheet is used to detect the performance of the measured solution, the working sub-electrode 1211, the counter sub-electrode 1221 and the reference sub-electrode 1231 in the first contact reaction layer 120 and the second contact reaction layer 130 are immersed in the measured solution and contact the measured solution.

[0053] The working sub-electrode 1211 includes a carbon paste ink layer. The counter sub-electrode 1221 includes a carbon paste ink layer. The reference sub-electrode 1231 includes a silver chloride layer. The materials of the first conductive electrode 1212, the second conductive electrode 1213, the third conductive electrode 1222, the fourth conductive electrode 1223, the fifth conductive electrode 1232 and the sixth conductive electrode 1233 all include a mixture of carbon paste ink and silver paste ink.

[0054] Optionally, with reference to Figure 1 , the width of the first conductive electrode 1212, the width of the third conductive electrode 1222 and the width of the fifth conductive electrode 1232 are all equal; the width of the second conductive electrode 1213, the width of the fourth conductive electrode 1223 and the width of the sixth conductive electrode 1233 are all equal; the width of the second conductive electrode 1213 is greater than the width of the first conductive electrode 1212.

[0055] Specifically, the width of the second conductive electrode can be 1.1 mm.

[0056] Optionally, the vertical projection of the working sub-electrode on the substrate is circular.

[0057] Specifically, the vertical projection of the working sub-electrode on the substrate is circular, which can improve the contact area between the measured solution and the working sub-electrode. For example, the diameter of the circle can be 3.2 mm.

[0058] Optionally, with reference to Figure 3 and Figure 4 , the first insulating layer 140 and the second insulating layer 150 are mirror-symmetric.

[0059] Specifically, the first contact reaction layer 120 and the second contact reaction layer 130 are mirror-symmetric, the first insulating layer 140 and the second insulating layer 150 are mirror-symmetric, that is, the position and area covered by the first insulating layer 140 on the first contact reaction layer 120 and the position and area covered by the second insulating layer 150 on the second contact reaction layer 130 are all corresponding to the same, which can ensure that the working state of the first contact reaction layer 120 is consistent with the working state of the second contact reaction layer 130.

[0060] Optionally, continuing to refer to Figure 1 The thickness of the first conductive electrode 1212, the thickness of the second conductive electrode 1213, the thickness of the third conductive electrode 1222, the thickness of the fourth conductive electrode 1223, the thickness of the fifth conductive electrode 1232 and the thickness of the sixth conductive electrode 1233 are all 5-15 μm. For example, the thickness of the first conductive electrode 1212 to the thickness of the sixth conductive electrode 1233 can all be equal, and the thickness of these conductive electrodes can be 5 μm, 6 μm, 7 μm, 8 μm, 9 μm, 10 μm, 11 μm, 12 μm, 13 μm, 14 μm or 15 μm, etc.

[0061] The embodiment also provides an electrochemical sensor, which comprises the electrode sheet provided by any of the embodiments of the utility model. Therefore, the electrochemical sensor comprises the beneficial effects of the electrode sheet described in any of the embodiments of the utility model, which will not be repeated here.

[0062] The embodiment also provides an electrochemical workstation, which comprises the electrochemical sensor provided by any of the embodiments of the utility model. Therefore, the electrochemical workstation comprises the beneficial effects of the electrochemical sensor described in any of the embodiments of the utility model, which will not be repeated here.

[0063] It should be understood that the various forms of flow shown above can be used to reorder, add or delete steps. For example, the steps described in the utility model can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solutions of the utility model can be achieved, which will not be limited herein.

[0064] The above specific embodiments do not constitute a limitation on the protection scope of the utility model. Those skilled in the art should understand that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. An electrode sheet, characterized in that, include: Substrate, first contact reaction layer and second contact reaction layer; The substrate includes a first surface and a second surface disposed opposite to each other; The first contact reaction layer is located on the first surface, and the first contact reaction layer includes a working electrode, a counter electrode, and a reference electrode; The second contact reaction layer is located on the second surface, and the second contact reaction layer includes a working electrode, a counter electrode, and a reference electrode; the first contact reaction layer and the second contact reaction layer are mirror-symmetrical and electrically connected.

2. The electrode sheet according to claim 1, characterized in that, It also includes a first insulating layer and a second insulating layer; The first insulating layer is located on the side of the first contact reaction layer away from the substrate, and the first insulating layer exposes the working end and the conductive end of the first contact reaction layer; The second insulating layer is located on the side of the second contact reaction layer away from the substrate, and the second insulating layer exposes the working end and the conductive end of the second contact reaction layer.

3. The electrode sheet according to claim 1, characterized in that, It also includes a first connection layer, a second connection layer, and a third connection layer located on a third surface of the substrate; the third surface is adjacent to both the first surface and the second surface; The first connecting layer is used to electrically connect the working electrode in the first contact reaction layer to the working electrode in the second contact reaction layer; The second connection layer is used to electrically connect the counter electrode in the first contact reaction layer to the counter electrode in the second contact reaction layer; The third connection layer is used to electrically connect the reference electrode in the first contact reaction layer to the reference electrode in the second contact reaction layer.

4. The electrode sheet according to claim 2, characterized in that, The working electrode in the first contact reaction layer includes a working sub-electrode, a first conductive electrode, and a second conductive electrode connected in sequence. The first contact reaction layer includes a pair of electrodes, a third conductive electrode, and a fourth conductive electrode connected in sequence. The reference electrode in the first contact reaction layer includes a reference sub-electrode, a fifth conductive electrode, and a sixth conductive electrode connected in sequence; The pair of sub-electrodes are arranged around the outer periphery of the working sub-electrode; The working sub-electrode, the pair sub-electrode, and the reference sub-electrode are the working ends of the first contact reaction layer, and the second conductive electrode, the fourth conductive electrode, and the sixth conductive electrode are the conductive ends of the first contact reaction layer.

5. The electrode sheet according to claim 4, characterized in that, The widths of the first conductive electrode, the third conductive electrode, and the fifth conductive electrode are all equal. The widths of the second conductive electrode, the fourth conductive electrode, and the sixth conductive electrode are all equal. The width of the second conductive electrode is greater than the width of the first conductive electrode.

6. The electrode sheet according to claim 4, characterized in that, The vertical projection of the working sub-electrode on the substrate is circular.

7. The electrode sheet according to claim 2, characterized in that, The first insulating layer and the second insulating layer are mirror images of each other.

8. The electrode sheet according to claim 4, characterized in that, The thicknesses of the first conductive electrode, the second conductive electrode, the third conductive electrode, the fourth conductive electrode, the fifth conductive electrode, and the sixth conductive electrode are all 5 μm to 15 μm.

9. An electrochemical sensor, characterized in that, Includes the electrode sheet as described in any one of claims 1-8.

10. An electrochemical workstation, characterized in that, Including the electrochemical sensor as described in claim 9.

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