Electrodynamic potential measurement jig

Abstract

This invention provides a clamp for measuring electrophoretic potential, which allows for easy sample placement in a container without the need for specialized tools. The clamp for measuring electrophoretic mobility includes: a frame having first and second retaining walls arranged opposite each other and having openings at corresponding locations, and a bottom wall connecting the lower ends of the first and second retaining walls; an intermediate block forming part of a retaining space between the first and second retaining walls, disposed adjacent to the container above or below the opening; and a container pressing member disposed between the first and second retaining walls, positioned above the intermediate block, pressing the container and the intermediate block towards the bottom wall. At least one of the first and second retaining walls has a first groove or a first protrusion for laterally supporting the intermediate block, the first protrusion elastically engaging the first groove, and the intermediate block having the other of the first groove or the first protrusion.

Description

Technical Field

[0001] This invention relates to a clamp for measuring electrokinetic potential. Background Technology

[0002] An electrophoretic mobility measuring device is known to measure the electrophoretic mobility and zeta potential (electrokinetic potential) of particles moving within a sample container under the influence of an electric field. The device illuminates a sample to which an electric field has been applied with light, and a photodetector detects the scattered light emitted by the sample. The particle velocity is calculated by analyzing the frequency components of the detected scattered light, yielding a particle velocity distribution or a distribution of the electrophoretic mobility of these particles (see Patent Documents 1 to 3 below).

[0003] An electrophoretic mobility measuring apparatus uses a box with transparent walls (see Patent Document 4 below). The box contains a sample in which the particle dispersion to be measured is suspended.

[0004] To fix the position of the sample-containing container within the electrophoretic mobility measuring apparatus, a potentiodynamic (EMG) fixture is used. If the sample leaks out of the EMG fixture, it may cause contamination or damage to the electrophoretic mobility measuring apparatus. Conventionally, bolts and nuts were used to secure the container in the EMG fixture, a cumbersome process. Furthermore, for high-precision measurements, the sample placed in the container needs to be illuminated at an appropriate angle. Therefore, multiple nuts need to be tightened with appropriate torque, another cumbersome process.

[0005] Existing technical documents

[0006] Patent documents

[0007] Patent Document 1: Japanese Patent Application Publication No. 10-104188

[0008] Patent Document 2: Japanese Patent Application Publication No. 2012-229932

[0009] Patent Document 3: International Publication No. 2016 / 117570

[0010] Patent Document 4: Japanese Patent Application Publication No. 05-312757 Summary of the Invention

[0011] The problem that the invention aims to solve

[0012] This disclosure is an invention made in view of the above-mentioned actual situation, and its object is to provide a clamp for measuring electromotive potential that can easily place a sample in a box.

[0013] Solution for solving the problem

[0014] To address the aforementioned problems, the present disclosure discloses a clamp for measuring electrophoretic mobility, used in an electrophoretic mobility measuring device. It is characterized by comprising: a frame having a first retaining wall and a second retaining wall arranged opposite each other and having openings at corresponding positions, and a bottom wall connecting the lower ends of the first retaining wall and the second retaining wall; an intermediate block, located between the first retaining wall and the second retaining wall, forming part of a holding space for holding a sample, and disposed adjacent to a box disposed on the side of the openings, above or below; and a box pressing member, located between the first retaining wall and the second retaining wall, disposed above the intermediate block, pressing the box and the intermediate block towards the bottom wall side. At least one of the first retaining wall and the second retaining wall has one of a first groove or a first protrusion for laterally supporting the intermediate block, the first protrusion elastically engaging with the first groove, and the intermediate block having the other of the first groove or the first protrusion. Attached Figure Description

[0015] Figure 1 This is a perspective view of the fixture for measuring electromotive potential according to this embodiment.

[0016] Figure 2 This is a perspective view of the clamp for measuring electromotive potential, which is arranged in the electrophoretic mobility measuring device.

[0017] Figure 3 These are the three views of a fixture for measuring electromotive potential.

[0018] Figure 4 These are the three views of a fixture for measuring electromotive potential.

[0019] Figure 5 These are the three views of a fixture for measuring electromotive potential.

[0020] Figure 6 These are the three views of a fixture for measuring electromotive potential.

[0021] Figure 7 It is a diagram showing the IIV-IIV cross-section.

[0022] Explanation of reference numerals in the attached figures:

[0023] 100: Clamp for measuring electromotive potential; 102: Holding space; 104: Measuring space; 200: Frame; 202: First holding wall; 204: Second holding wall; 206: Bottom wall; 208: Plate-shaped part; 210: Handle part; 212: Opening; 214: First groove; 216: Second groove; 218: Recess; 220: Anode plate; 222: Cathode plate; 300: Intermediate block; 302: Lower section block; 30 4: Middle section block; 306: Sample supply knob; 308: Anode hole; 310: Cathode hole; 312: First protrusion; 314: Supply path; 400: Box; 500: Box pressing part; 502: Box upper surface pressing part; 504: Upper section block; 506: Second protrusion; 600: First pressing part; 700: Second pressing part; 702: Knob part; 704: Shaft part; 800: Electrophoretic mobility measuring device. Detailed Implementation

[0024] Hereinafter, embodiments of the present disclosure will be described with reference to the accompanying drawings.

[0025] Figure 1 (a) and Figure 1 (b) is a perspective view of the electromotive force measuring fixture 100 of this embodiment, viewed from different directions. Figure 1 (a) and Figure 1 As shown in (b), the electromotive force measuring fixture 100 of this embodiment includes a frame 200, an intermediate block 300, a box 400, a box pressing member 500, a first pressing part 600, and a second pressing part 700. The frame 200 includes a first holding wall 202, a second holding wall 204, and a bottom wall 206. The intermediate block 300 includes a lower section block 302, a middle section block 304, and a sample supply knob 306. The box pressing member 500 includes a box upper surface pressing part 502 and an upper section block 504.

[0026] The electrokinetic potential measuring fixture 100 is used in the electrophoretic mobility measuring device 800. Specifically, the electrokinetic potential measuring fixture 100 is configured in... Figure 2 The electrophoretic mobility measuring apparatus 800 shown measures the electrokinetic potential. A sample-containing container 400 is disposed inside the electrokinetic potential measuring fixture 100. The electrophoretic mobility measuring apparatus 800 applies an electric field to the sample disposed in the container 400 via the anode plate 220 and cathode plate 222 (described later). Openings 212 are provided in the first holding wall 202 and the second holding wall 204. The electrophoretic mobility measuring apparatus 800 illuminates measuring light through one of the openings 212. Furthermore, the electrokinetic mobility measuring apparatus 800 measures the electrokinetic potential based on the scattered light emitted from the other opening 212. It should be noted that the method for measuring the electrokinetic potential is the same as in the prior art, and therefore its description is omitted here.

[0027] The following is for reference Figures 3 to 7 The components of the clamp 100 for measuring electromotive potential will be explained. Figure 3 It is a three-view drawing of the frame 200 of each component included in the fixture 100 for measuring electromotive potential. Figure 4 It is a three-view drawing that only shows the frame 200, the lower block 302, and the sample supply knob 306. Figure 5 It only shows the three-view diagrams of the frame 200, the lower block 302, the sample supply knob 306, and the box 400. Figure 6 It is a three-view drawing showing all the components of the clamp 100 for measuring electromotive potential. Figure 7 It means Figure 6 A diagram of the IIV-IIV cross section.

[0028] The first retaining wall 202 and the second retaining wall 204 are arranged opposite to each other and have openings 212 at corresponding positions. Specifically, as Figure 3 As shown, the first holding wall 202 and the second holding wall 204 each have: a plate-like portion 208, which has a wide surface in the xz plane and a thin shape in the y direction; and a handle portion 210 located at the upper part (z direction). In the first holding wall 202 and the second holding wall 204, the xz planes of the plate-like portions 208 are arranged opposite each other. The plate-like portions 208 have openings 212 extending in the y direction at corresponding positions. One side of the opening 212 allows light irradiating the sample to pass through, and the other side of the opening 212 allows light scattered by the sample to pass through.

[0029] The bottom wall 206 connects the lower ends of the first retaining wall 202 and the second retaining wall 204. Specifically, the bottom wall 206 is disposed at the lower ends of the first retaining wall 202 and the second retaining wall 204, and the positional relationship between the first retaining wall 202 and the second retaining wall 204 is fixed by bolts. An anode plate 220 and a cathode plate 222 are disposed on the bottom wall 206. One of the anode plate 220 and the cathode plate 222 is electrically connected via a conductive plate extending in the x-direction to a terminal on which a predetermined voltage is applied by the electrophoretic mobility measuring device 800. The other is electrically connected via a conductive plate extending in the -x-direction to a terminal on which a predetermined voltage is applied by the electrophoretic mobility measuring device 800. The electrophoretic mobility measuring device 800 applies a voltage higher than the voltage applied to the cathode plate 222 to the anode plate 220.

[0030] An intermediate block 300, a box 400, a box pressing member 500, a first pressing part 600, and a second pressing part 700 are disposed between the first retaining wall 202 and the second retaining wall 204. Specifically, the lower section block 302, the box 400, the intermediate section block 304, the upper section block 504, the first pressing part 600, and the second pressing part 700 are arranged sequentially from the bottom wall 206 upward (z direction) between the first retaining wall 202 and the second retaining wall 204.

[0031] At least one of the first retaining wall 202 and the second retaining wall 204 has either a first groove 214 or a first protrusion 312 for laterally supporting the intermediate block 300, the first protrusion 312 being elastically fitted into the first groove 214. Specifically, each plate-like portion 208 of the first retaining wall 202 and the second retaining wall 204 has a first groove 214 at a position corresponding to the lower section block 302 and at a position corresponding to the middle section block 304. The first groove 214 is a groove disposed along the x-direction on the opposite surfaces of each plate-like portion 208 of the first retaining wall 202 and the second retaining wall 204. A plunger disposed on the lower section block 302 and the middle section block 304 is fitted into the first groove 214.

[0032] It should be noted that, in Figures 3 to 6 In the middle section block 304, a first groove 214 is provided at both the position corresponding to the lower section block 302 and the position corresponding to the middle section block 304. However, the first groove 214 only needs to be provided at the position corresponding to the middle section block 304. In addition, it is preferred that the first groove 214 and the first protrusion 312 are provided on both the first retaining wall 202 and the second retaining wall 204, but it is also possible that they are provided on only one side.

[0033] Furthermore, at least one of the first retaining wall 202 and the second retaining wall 204 has a second groove 216 for pressing the side support box 500 or a second protrusion 506 that is elastically fitted into the second groove 216. Specifically, each plate-shaped portion 208 of the first retaining wall 202 and the second retaining wall 204 has a second groove 216 at a position corresponding to the upper segment block. The second groove 216 is a groove provided along the x-direction on the opposite surface of each plate-shaped portion 208 of the first retaining wall 202 and the second retaining wall 204. A plunger provided at a corresponding position of the upper segment block 504 is fitted into the second groove 216. It should be noted that the second groove 216 and the second protrusion 506 are preferably provided on both the first retaining wall 202 and the second retaining wall 204, but they may be provided on only one side or not on both sides simultaneously.

[0034] The first retaining wall 202 and the second retaining wall 204 have areas that contact the upper surface of the first pressing portion 600 when the first pressing portion 600 is positioned in the direction opposite to the first retaining wall 202 and the second retaining wall 204 along its long axis. Specifically, each handle portion 210 of the first retaining wall 202 and the second retaining wall 204 has a recess 218 at a position corresponding to the first pressing portion 600. The recess 218 is provided on the opposite surfaces of the first retaining wall 202 and the second retaining wall 204 for the end portion of the first pressing portion 600 to engage. It should be noted that the first retaining wall 202 and the second retaining wall 204 may also have an eave shape instead of a recess 218 shape in the area contacting the upper surface of the first pressing portion 600. In this case, the lower side of the eave becomes the area contacting the upper surface of the first pressing portion 600.

[0035] The intermediate block 300 forms part of the holding space 102 for holding the sample between the first holding wall 202 and the second holding wall 204, and is disposed above or below the box 400 located on the side of the opening 212. Specifically, the intermediate block 300 has a lower section block 302, a middle section block 304, and a sample supply knob 306 disposed between the first holding wall 202 and the second holding wall 204.

[0036] The lower segment 302 has an anode hole 308 and a cathode hole 310, which respectively form part of the holding space 102. An anode plate 220 and a cathode plate 222 are located at the bottom of the anode hole 308 and cathode hole 310, respectively. A box 400 is disposed inside the lower segment 302. Specifically, the lower segment 302 has a space for arranging the box 400 on its inner side, and the anode hole 308 and cathode hole 310 are located below this space. The anode hole 308 and cathode hole 310 are located on the bottom wall 206 at positions corresponding to the anode plate 220 and cathode plate 222. The anode hole 308 and cathode hole 310 are spaces for arranging samples via a supply path 314, respectively forming part of the holding space 102 for holding the samples. The lower segment 302 is disposed adjacent to the box 400 below, located on the side of the opening 212 of the first holding wall 202 and the second holding wall 204.

[0037] The lower section 302 has a supply path 314 for supplying samples to the anode hole 308 and the cathode hole 310. Specifically, as... Figure 7As shown, the lower section 302 has a space (supply path 314) connecting the sides of the anode hole 308 and the cathode hole 310 to the portion where the sample supply knob 306 is disposed. The sample supply knob 306 is configured to be detachable from the lower surface of the housing 400 by pressing, and samples can be supplied to the anode hole 308 and the cathode hole 310 via the supply path 314. Thus, samples can be easily supplied even without removing the housing 400 from the electromotive force measuring fixture 100.

[0038] like Figure 4 As shown, when the first retaining wall 202 and the second retaining wall 204 are provided with a first groove 214, the lower segment block 302 has a plunger at a position corresponding to the first groove 214. Figure 3 As shown, the lower segment 302 is inserted from the top (z-direction) between the first retaining wall 202 and the second retaining wall 204, which are fixed by the bottom wall 206, thereby becoming Figure 4 The state is shown. During insertion, when the first protrusion 312 is in a position not corresponding to the first groove 214, the first protrusion 312 is positioned inside with its end along the surfaces of the first retaining wall 202 and the second retaining wall 204. On the other hand, when the first protrusion 312 is in a position corresponding to the first groove 214, the first protrusion 312 elastically engages with the first groove 214. This allows for easy configuration of the lower segment block 302.

[0039] The housing 400 has a measurement space 104 communicating with each of the anode aperture 308 and the cathode aperture 310, and is formed of a material that transmits light irradiated onto the sample and scattered light dispersed by the sample. Specifically, the housing 400 is formed of transparent glass. Furthermore, as... Figure 4 and Figure 7 As shown, the housing 400 has two spaces extending along the z-direction from both the anode hole 308 and the cathode hole 310 to the upper surface of the housing 400, and a space disposed in the xy-plane connecting these two spaces. During measurement, these spaces are filled with the sample. The space disposed in the xy-plane is located to the side of the opening 212 of the first holding wall 202 and the second holding wall 204, and functions as the measurement space 104. Thus, light is irradiated onto the sample disposed in the measurement space 104.

[0040] The lower surface of the box 400 is supported by the lower segment block 302. In this embodiment, the position of the box 400 in the xy plane is supported by the lower segment block 302, but it can also be supported by the middle segment block 304. The lower segment block 302 is disposed between the first retaining wall 202 and the second retaining wall 204. Figure 4 In this state, box 400 is positioned within the space enclosed by lower segment block 302. Thus, it becomes... Figure 5 The state shown.

[0041] The middle section block 304 has a planar shape that overlaps with the periphery of the box 400 and is disposed on the upper side of the box 400. Specifically, as Figure 6 and Figure 7 As shown, the middle block 304 is shaped to surround the side of the pressing portion 502 on the upper surface of the box. The middle block 304 is disposed adjacent to the box 400 above the opening 212 of the first retaining wall 202 and the second retaining wall 204. The middle block 304 has a seal in the area where it contacts the box 400. This prevents the sample from leaking to the outside of the electrokinetic potential measuring fixture 100.

[0042] like Figure 4 As shown, when the first retaining wall 202 and the second retaining wall 204 are provided with a first groove 214, the middle section block 304 has a plunger at a position corresponding to the first groove 214. Figure 5 As shown, the middle section block 304 is inserted from the top (z direction) between the first retaining wall 202 and the second retaining wall 204 in the state where the lower section block 302 and the box 400 are arranged, thereby becoming Figure 5 The state shown is as follows. During insertion, when the first protrusion 312 is in a position not corresponding to the first groove 214, the first protrusion 312 is positioned inside with its end along the surfaces of the first retaining wall 202 and the second retaining wall 204. On the other hand, when the first protrusion 312 is in a position corresponding to the first groove 214, the first protrusion 312 elastically engages with the first groove 214. This allows for easy configuration of the middle section block 304.

[0043] The box pressing member 500 is disposed between the first retaining wall 202 and the second retaining wall 204, above the intermediate block 300, and presses the box 400 and the intermediate block 300 toward the bottom wall 206. Specifically, the box pressing member 500 has: a box upper surface pressing portion 502, having a region that forms another part of the retaining space 102, disposed above the box 400, and pressing the upper surface of the box 400 toward the bottom wall 206; and an upper section block 504, disposed above the middle section block 304, and pressing the middle section block 304 toward the bottom wall 206.

[0044] like Figure 7As shown, the upper surface pressing portion 502 of the box is disposed in contact with the upper surface of the box 400, and the surface in contact with the box 400 is formed flat. The area of ​​the surface in contact with the box 400 that is in contact with the measuring space 104 together with the box 400 forms part of the holding space 102. Preferably, a seal is disposed in the area forming part of the holding space 102 to prevent sample leakage. The upper surface pressing portion 502 of the box has a hole on its upper side that engages with the second pressing portion 700, the wall of which is threaded. When the second pressing portion 700 is rotated, the upper surface pressing portion 502 of the box is pressed downward through the second pressing portion 700 engaged in the hole. This prevents the sample from leaking from the holding space 102.

[0045] The upper section block 504 is disposed above the upper surface pressing part 502 and the middle section block 304 of the box. The upper side of the upper section block 504 is in contact with the first pressing part 600. As described later, the first pressing part 600 rotates, thereby pressing the upper section block 504 toward the bottom wall 206. In addition, the upper section block 504 has a through hole in the vertical direction above the box 400. A second pressing part 700 is disposed in this through hole. The sidewall of this through hole is not threaded, so unlike the pressing applied by the first pressing part 600 to the upper surface pressing part 502 of the box, it can be pressed toward the bottom wall 206 by the first pressing part 600.

[0046] The box pressing member 500 has one of a second groove 216 or a second protrusion 506. Specifically, as Figure 6 As shown, when the first retaining wall 202 and the second retaining wall 204 are provided with second grooves 216, the upper section block 504 has plungers at positions corresponding to the second grooves 216 respectively. With the middle section block 304 disposed, the upper surface pressing portion 502 is disposed on the box 400. Furthermore, the upper section block 504 is inserted from above (z-direction) between the first retaining wall 202 and the second retaining wall 204, thereby becoming... Figure 6 The state shown. At this time, the upper segment block 504 is provided with a second protrusion 506 that elastically engages with the second groove 216, so the upper segment block 504 can be easily configured.

[0047] The first pressing part 600 has a shape having both a major axis and a minor axis, and rotates in the in-plane direction of the bottom wall 206 to press the upper segment block 504 toward the bottom wall 206. Specifically, the first pressing part 600 has a generally elliptical shape having both a major axis and a minor axis, and its upper surface has a slope that decreases in height in the z-direction towards the end. The first pressing part 600 is disposed on the upper segment block 504. When the first pressing part 600 is configured to rotate in the xy-plane with its major axis in the y-axis direction, it engages with the recess 218 provided in the handle part 210. When the first pressing part 600 engages with the recess 218, the upper segment block 504 disposed on the lower side of the first pressing part 600 is pressed toward the bottom wall 206 by the slope provided on the upper surface. It should be noted that when the handle portion 210 has an eave shape instead of a recess 218, the lower side of the eave is in contact with the upper surface of the first pressing portion 600.

[0048] The second pressing part 700 is disposed in the through hole, pressing the upper surface pressing part 502 of the box against the box 400. Specifically, the second pressing part 700 has a knob part 702 and a shaft part 704. The knob part 702 is disposed above the first pressing part 600 and fixed to the shaft part 704. The shaft part 704 is disposed in the through hole provided in the first pressing part 600 and the upper block 504, and its lower end is fitted into the hole provided in the upper surface pressing part 502. The surface of the lower end of the shaft part 704 is threaded, and the knob part 702 is rotated, thereby pressing the upper surface pressing part 502 of the box downward. The upper surface pressing part 502 of the box is pressed, thereby preventing the sample from leaking from the holding space 102.

[0049] It should be noted that, as described above, the intermediate block 300 has a first protrusion 312 and the box pressing member 500 has a second protrusion 506, but the intermediate block 300 may also have a first groove 214 and the box pressing member 500 may also have a second groove 216.

[0050] Furthermore, the lower surface pressing part, the middle section block 304, and the upper section block 504 of the box 400 can be inserted into and removed from the first retaining wall 202 and the second retaining wall 204. The first protrusion 312 and the second protrusion 506 elastically engage with the first groove 214 or the second groove 216, thus allowing for easy insertion and removal. As a result, the sample can be easily replaced.

[0051] Furthermore, the case where the first protrusion 312 and the second protrusion 506 are plungers has been described, but as long as they are configured to elastically fit with the first groove 214 and the second groove 216, the first protrusion 312 and the second protrusion 506 may not be plungers.

[0052] Furthermore, while the case where the second pressing part 700 is located at the center of the xy-plane has been described, the second pressing part 700 may also be located at four corners of the xy-plane. Moreover, while the case where the first pressing part 600 presses the upper section block 504 and the second pressing part 700 presses the pressing part 502 on the upper surface of the box has been described, the configuration of the second pressing part 700 pressing all the lower section blocks 302, the middle section blocks 304, and the upper section block 504 may also be present. For example, when the second pressing part 700 is located at four corners of the xy-plane, the lower section blocks 302, the middle section blocks 304, and the upper section blocks 504 may each have through holes at positions corresponding to the second pressing part 700. In this case, the inner wall of the through hole and the shaft portion 704 of the second pressing portion 700 may be threaded, and the second pressing portion 700 may rotate, thereby pressing the lower block 302, the middle block 304 and the upper block 504 together toward the bottom wall 206.

Claims

1. A clamp for measuring electrokinetic potential, used in an electrophoretic mobility measuring device, characterized in that... have: The frame has a first retaining wall and a second retaining wall that are arranged opposite each other and have openings at corresponding positions, and a bottom wall that connects the lower ends of the first retaining wall and the second retaining wall. The intermediate block, between the first retaining wall and the second retaining wall, forms part of the retaining space for holding the sample, and is disposed above or below the box located on the side of the opening; as well as A box-pressing component, positioned between the first retaining wall and the second retaining wall, is located above the intermediate block, pressing the box and the intermediate block towards the bottom wall. At least one of the first retaining wall and the second retaining wall has one of a first groove or a first protrusion for laterally supporting the intermediate block, the first protrusion being elastically engaged with the first groove. The intermediate block has the other of the first groove or the first protrusion. At least one of the first retaining wall and the second retaining wall has one of a second groove or a second protrusion for laterally supporting the box press member, the second protrusion being elastically engaged with the second groove. The box pressing member has the other of the second groove or the second protrusion.

2. The clamp for measuring electromotive potential according to claim 1, characterized in that, The intermediate block has: The lower segment has an anode hole and a cathode hole, which respectively form part of the retaining space. An anode plate and a cathode plate are located at the bottom of the anode hole and cathode hole, respectively. The housing is disposed inside the lower segment. The middle section block has a planar shape that overlaps with the periphery of the box and is disposed on the upper side of the box.

3. The clamp for measuring electromotive potential according to claim 2, characterized in that, The box pressing component has: The upper surface pressing part of the box has an area that constitutes another part of the holding space, is disposed on the box and presses the upper surface of the box toward the bottom wall side; as well as The upper block is positioned above the middle block, pressing the middle block towards the bottom wall.

4. The clamp for measuring electromotive potential according to claim 3, characterized in that, The electromotive force measuring fixture also has a first pressing part, which has a shape with a major axis and a minor axis. It rotates in the in-plane direction of the bottom wall to press the upper block towards the bottom wall. The first retaining wall and the second retaining wall have a region that contacts the upper surface of the first pressing part when the long axis direction of the first pressing part is located in the direction opposite to the first retaining wall and the second retaining wall.

5. The clamp for measuring electromotive potential according to claim 3, characterized in that, The upper block has a through hole extending vertically through the top of the box. The electromotive potential measuring fixture also has a second pressing part, which is disposed in the through hole, and presses the pressing part on the upper surface of the box against the box.

6. The clamp for measuring electromotive potential according to any one of claims 2 to 5, characterized in that, The lower section has a supply path for supplying the sample to the anode orifice and the cathode orifice.

7. The clamp for measuring electromotive potential according to claim 1, characterized in that, The first protrusion and / or the second protrusion is a plunger.

8. The clamp for measuring electromotive potential according to any one of claims 2 to 5, characterized in that, It also has: The box, having a measurement space communicating with each of the anode and cathode apertures, is formed of a material that allows light irradiated onto the sample and scattered light emitted by the sample to be transmitted.

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