Spectral measurement sample cell device

Abstract

The utility model discloses a spectral measurement sample cell device, which comprises a sample cell used for placing a film sample or a trace cuvette used for placing a liquid sample; the two-dimensional displacement device is used for moving the sample pool in the direction perpendicular to the light path so as to reduce the light damage of the sample; the magnetic stirring device is used for disturbing the liquid sample in the trace cuvette so as to reduce the light damage of the sample; the air extractor is used for extracting air in the sample pool to enable the sample to be in a vacuum state; and the temperature control device is used for controlling the temperature of the sample in the sample pool. The spectral measurement sample cell device disclosed by the utility model not only can be used for measuring liquid samples and film samples, but also is suitable for detection under various specific conditions, such as a deoxidizing condition, a drying condition, a temperature control condition, a light shielding condition and the like; meanwhile, a trace cuvette can be placed in the sample tank, so that a liquid sample is not easy to adhere to the sample tank, and the cleaning is convenient.

Description

Technical Field

[0001] The utility model relates to the field of spectrum information measurement, in particular to a spectrum measurement sample pool device. Background Art

[0002] During sample spectrum testing, testing tools such as sample cells are essential. For some measurements that don't require special conditions, a standard sample cell can be used. However, many tests often require specific conditions. For example, some samples react with oxygen or water vapor in the air, causing sample deterioration. In these cases, vacuum conditions or a protective atmosphere are required. Some sample tests require specific temperatures, requiring temperature control. Some samples have poor photostability, requiring movement or sample disturbance to prevent continuous light exposure at the same location.

[0003] However, there is currently no sample cell that can be used for both liquid and thin film sample testing and meets conditions such as degassing, temperature control, disturbance / movement, etc., which brings great difficulties to sample testing under specific conditions. Therefore, there is an urgent need for a sample cell device that can achieve functions such as degassing, temperature control, disturbance / movement, etc. and can measure both liquid and thin film samples. Utility Model Content

[0004] In view of the above problems, the utility model proposes a spectrum measurement sample cell device.

[0005] The utility model adopts a spectrum measurement sample cell device, comprising:

[0006] A sample pool, used for placing a thin film sample or a micro cuvette, wherein the micro cuvette is used for placing a liquid sample;

[0007] a two-dimensional displacement device, used for moving the sample cell in a direction perpendicular to the light path to reduce light damage to the sample;

[0008] a magnetic stirring device, used to disturb the liquid sample in the micro-cuvette to reduce light damage to the sample;

[0009] an air extraction device, used to extract the air in the sample pool to put the sample into a vacuum state; and

[0010] The temperature control device is used to control the temperature of the sample in the sample pool.

[0011] Preferably, the sample cell comprises a sample cell body and a screw cap, the screw cap is provided with an exhaust pipe, the exhaust pipe is connected to the exhaust device, and the exhaust pipe is also provided with a stop valve.

[0012] Preferably, the air extraction device is a mechanical pump or an oil pump.

[0013] Preferably, the screw cap is further provided with an air inlet pipe for filling the interior of the sample cell with protective gas.

[0014] Preferably, a built-in pipeline for circulating temperature-controlled liquid is provided inside the sample cell body, the two ends of the built-in pipeline are a liquid inlet and a liquid outlet, and the temperature control device is connected between the liquid inlet and the liquid outlet outside the sample cell body.

[0015] Preferably, the temperature control device controls the sample temperature in the sample pool by circulating liquid, and the liquid used is water, antifreeze or oil.

[0016] Preferably, a first slot for placing the thin film sample and a second slot for placing the micro cuvette are provided inside the sample cell body.

[0017] Preferably, the magnetic stirring device comprises a micro magnetic stirring bar and an external rotating magnet, the micro magnetic stirring bar is placed in the micro cuvette, and the micro magnetic stirring bar is driven by the external rotating magnet.

[0018] Preferably, the two-dimensional displacement device is composed of two vertical electric push rods or two vertical screw motors.

[0019] Preferably, the sample cell body is made of fused quartz or glass.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] The present invention provides a spectral measurement sample cell device that can be used for measuring both liquid and thin film samples and is suitable for testing under a variety of specific conditions, such as deoxygenation, drying, temperature control, and light protection. Furthermore, a micro-cuvette can be placed within the cell, making it difficult for liquid samples to adhere to the sample cell and easy to clean. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a structural schematic diagram of a spectrum measurement sample cell device according to a preferred embodiment of the present utility model.

[0023] Figure 2 This is a schematic diagram of a sample cell, a two-dimensional displacement device and an optical path of a spectrum measurement sample cell device in a preferred embodiment of the present utility model.

[0024] Figure 3 This is a schematic diagram of a sample cell body of a spectral measurement sample cell device in a preferred embodiment of the present utility model, wherein (a) is a front view of the sample cell body, (b) is a side view of the sample cell body, and (c) is a top view of the sample cell body. DETAILED DESCRIPTION

[0025] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0026] In the description of this utility model, it should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to direct connections, indirect connections through an intermediate medium, or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0027] The following will illustrate the implementation methods of the present invention in conjunction with the drawings in the specification. It should be noted that the implementation methods involved in this specification are not exhaustive and do not represent the only implementation methods of the present invention. The following corresponding embodiments are only for the purpose of clearly illustrating the utility model content of the utility model patent and are not intended to limit its implementation methods. For ordinary technicians in this field, different forms of changes and modifications can be made on the basis of the description of these embodiments. All obvious changes or modifications that belong to the technical concept and utility model content of the present invention are also within the scope of protection of the present invention.

[0028] Figure 1 This is a schematic structural diagram of a spectrum measurement sample cell device according to a preferred embodiment of the present invention. Figure 1As shown, the sample pool device includes a sample pool 1, a two-dimensional displacement device 2, a magnetic stirring device 3, an exhaust device 4 and a temperature control device 5. Each component is described in detail below. The sample pool 1 is used to place thin film samples or micro cuvettes, wherein the micro cuvette is used to place liquid samples. Usually the thin film sample is spin-coated or evaporated on a substrate of quartz or other materials, and the liquid sample is placed in a micro cuvette, and the light-transmitting thickness of the micro cuvette is 1-2 mm. The two-dimensional displacement device 2 is used to move the sample pool 1 in a direction perpendicular to the light path to reduce the light damage of the sample. The magnetic stirring device 3 is used to disturb the liquid sample in the micro cuvette to reduce the light damage of the sample. The exhaust device 4 is used to extract the air in the sample pool 1. The temperature control device 5 is used to control the temperature of the sample in the sample pool 1.

[0029] Figure 2 The sample pool, two-dimensional displacement device and optical path diagram of the preferred embodiment of the utility model are shown in FIG. Figure 2 As shown, a sample cell 1 is placed on a two-dimensional displacement device 2. Excitation light 6 passes through the sample cell 1. Preferably, the two-dimensional displacement device 2 is composed of two perpendicular electric push rods or two perpendicular screw motors, so that the sample cell body 11 can move two-dimensionally on the two-dimensional displacement device 2 along a plane perpendicular to the excitation light 6.

[0030] In each preferred embodiment, the sample cell 1 includes a sample cell body 11 and a screw cap 14, and the screw cap 14 is provided with an air inlet pipe 15 and an air extraction pipe 16. The air extraction pipe 16 is provided with a stop valve 18, and the air extraction pipe 16 is connected to the air extraction device 4 (see Figure 1 ) is connected. The vacuum device 4 extracts air through the vacuum pipe 16. After the vacuum is completed, the shut-off valve 18 is closed to maintain the vacuum in the sample cell. Preferably, the vacuum device 4 is a mechanical pump or an oil pump. A shut-off valve 17 is provided on the air inlet pipe 15. The air inlet pipe 15 and the shut-off valve 17 are used to charge the protective gas. After the charging is completed, the shut-off valve 17 is closed.

[0031] In each preferred embodiment, the sample cell body 11 is provided with an internal pipe 112 for circulating the temperature-controlled liquid. The two ends of the internal pipe 112 are connected to the liquid inlet 12 and the liquid outlet 13 on the external side wall of the sample cell body 11. The temperature control device 5 is connected between the liquid inlet 12 and the liquid outlet 13 on the external side wall of the sample cell body 11 (see Figure 1 ). Preferably, the liquid used in the temperature control device 5 and the built-in pipeline 112 connected thereto can be water, antifreeze, oil, etc., which can be selected according to the required detection temperature of the liquid sample.

[0032] Preferably, the magnetic stirring device 3 (see Figure 1) includes a micro magnetic stirrer 31 and an external rotating magnet (not shown). The micro magnetic stirrer 31 is placed in the liquid (not shown) in the micro cuvette in the sample cell and is driven by the magnetic stirring device 3 to stir the liquid. Generally, the external rotating magnet can be mounted on an electric motor to drive the magnetic stirrer 31 in the micro cuvette to rotate and stir the liquid.

[0033] Preferably, the sample cell body 11 is made of a transparent material such as fused quartz or glass to ensure the pass rate of the excitation light 6 .

[0034] Figure 3 The three views of the main body of the sample cell of the present invention are shown in FIG. (a) is a front view of the sample cell body, FIG. (b) is a side view of the sample cell body, and FIG. (c) is a top view of the sample cell body. The top of the sample cell body 11 is provided with a threaded interface 19 for connecting the screw cap 14 (see FIG. Figure 2 ). The sample pool body 11 is internally provided with a built-in pipeline 112, a first card slot 111 for placing a thin film sample, and a second card slot 113 for placing a micro cuvette. The size of the first card slot 111 matches the thin film sample, and the size of the second card slot 113 matches the micro cuvette. The first card slot 111 and the second card slot 113 can be set independently or separately, and can also be set to have a common space. In a preferred embodiment of the present utility model, the first card slot 111 and the second card slot 113 are set to have a common space, that is, there is a common area in the middle part so that the volume of the sample pool can be saved. The built-in pipeline 112 is laid around the bottom of the first card slot 111 and the second card slot 113, and is used for circulating liquid temperature control, with the two ends connected to the liquid inlet 12 and the liquid outlet 13 respectively. The temperature-controlled liquid flows in from the liquid inlet 12, flows back to the temperature control device 5 from the liquid outlet 13 after passing through the built-in pipeline 112, and flows out again after temperature compensation in the temperature control device 5.

[0035] The following further describes the sample measurement methods under different conditions in conjunction with the preferred embodiments of the present invention.

[0036] 1. Sample conditions susceptible to light damage

[0037] For samples that are easily damaged by light, the samples need to be moved or disturbed during measurement.

[0038] (1) When the sample is a liquid sample, the sample is placed in a micro cuvette with a light-transmitting thickness of 1-2 mm. The magnetic stirring bar 31 is placed in the micro cuvette, and the micro cuvette is placed in the second slot 113. The external rotating magnet of the magnetic stirring device 3 is placed outside the sample cell body 11, close to but not affecting the light transmission. When powered on, the magnetic stirring bar 31 is driven to stir, causing a certain degree of flow in the liquid sample. In this way, the excitation light 6 will not continuously hit the same part of the sample molecules, thereby reducing light damage.

[0039] (2) When the sample is a thin film, the film sample is placed in the first slot 111, and the two-dimensional displacement device 2 moves in a plane perpendicular to the excitation light 6. The movement can follow a specific trajectory, such as a rounded rectangle, or it can move randomly within a given range. This prevents the excitation light 6 from continuously hitting the same position on the film, reducing photodamage to the sample. In addition, the movement of the two-dimensional displacement device 2 in a plane perpendicular to the excitation light 6 is also applicable to liquid sample measurements.

[0040] 2. Degassing / protective gas conditions

[0041] (1) For thin film samples, if it is necessary to eliminate the interference of oxygen, water vapor, etc. in the air, two methods can be used, one is degassing, and the other is filling with protective gas. When the degassing method is used, the thin film sample is placed in the first card slot 111, the screw cap 14 is rotated and tightened, the stop valve 17 is closed, the stop valve 18 is opened, the outlet pipe 16 is connected to the exhaust device 4, and the exhaust device 4 extracts the gas in the sample cell body 11, so that the thin film sample in the sample cell body 11 is in a vacuum state, which can effectively eliminate the interference of oxygen and water vapor in the air. When the protective gas filling method is used, first close the stop valve 17, open the stop valve 18, connect the outlet pipe 16 to the exhaust device 4, and the exhaust device 4 extracts the gas in the sample cell body 11, then open the stop valve 17, and fill the protective gas from the inlet pipe 15.

[0042] (2) For liquid samples, first place the sample in a micro-cuvette. After deoxygenation by ventilation bubbling or liquid nitrogen cooling, place the micro-cuvette in the second slot 113 of the sample cell body 11, rotate and tighten the screw cap 14, and then use the method of filling with protective gas to isolate the interference of oxygen and other components in the air. Close the stop valve 17, open the stop valve 18, connect the air outlet pipe 16 to the exhaust device 4, and the exhaust device extracts the gas in the sample cell 11. Then open the stop valve 17 and fill the protective gas from the air inlet pipe 15.

[0043] 3. Temperature control conditions

[0044] When temperature control is required, the sample in the sample cell body 11 is in a natural air state or a protective gas state, and the operation mode of the protective gas state is as described above. The temperature control device 5 is connected to the liquid inlet 12 and the liquid outlet 13 of the sample cell body 11. The temperature-controlled liquid flows through the internal pipeline 112 and then flows back to the temperature control device 5. The liquid flows out again after temperature compensation in the temperature control device 5. Through continuous liquid circulation, the internal temperature of the sample cell body 11 is kept at a constant temperature. When the temperature conditions need to be changed, the temperature set by the temperature control device 5 can be changed to change the temperature of the circulating liquid, and ultimately change the temperature of the sample. This temperature control device is suitable for both thin film samples and liquid samples.

[0045] This utility model provides a spectral measurement sample cell device that can be used for measuring both liquid and thin film samples and is suitable for testing under a variety of specific conditions, such as deoxygenation, drying, temperature control, and light protection. It allows for diverse usage. Existing micro-cuvettes can be placed within the device, reducing the device's purchase cost and user requirements. Furthermore, the sample cell is less susceptible to adhesion of liquid samples, making it easy to clean.

[0046] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0047] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A spectrum measurement sample cell device, characterized in that: include: A sample pool, used for placing a thin film sample or a micro cuvette, wherein the micro cuvette is used for placing a liquid sample; a two-dimensional displacement device, used for moving the sample cell in a direction perpendicular to the light path to reduce light damage to the sample; a magnetic stirring device, used to disturb the liquid sample in the micro-cuvette to reduce light damage to the sample; An air extraction device, used to extract the air in the sample pool to put the sample into a vacuum state; as well as The temperature control device is used to control the temperature of the sample in the sample pool.

2. A spectrum measurement sample cell device according to claim 1, characterized in that: The sample pool comprises a sample pool body and a screw cap. The screw cap is provided with an air extraction pipe connected to the air extraction device. The air extraction pipe is also provided with a stop valve.

3. A spectrum measurement sample cell device according to claim 2, characterized in that: The air extraction device is a mechanical pump or an oil pump.

4. The spectrum measurement sample cell device according to claim 2, characterized in that: The screw cap is also provided with an air inlet pipe for filling the interior of the sample cell with protective gas.

5. The spectrum measurement sample cell device according to claim 2, characterized in that: The sample cell body is provided with an internal pipeline for circulating temperature-controlled liquid. The two ends of the internal pipeline are a liquid inlet and a liquid outlet. The temperature control device is connected between the liquid inlet and the liquid outlet outside the sample cell body.

6. The spectrum measurement sample cell device according to claim 5, characterized in that: The temperature control device controls the sample temperature in the sample pool through liquid circulation, and the liquid used is water, antifreeze or oil.

7. The spectrum measurement sample cell device according to claim 2, characterized in that: The sample pool body is provided with a first card slot for placing the film sample and a second card slot for placing the micro cuvette.

8. The spectrum measurement sample cell device according to claim 1, characterized in that: The two-dimensional displacement device is composed of two vertical electric push rods or two vertical screw motors.

9. The spectrum measurement sample cell device according to claim 1, characterized in that: The magnetic stirring device includes a micro magnetic stirring bar and an external rotating magnet. The micro magnetic stirring bar is placed in the micro cuvette and is driven by the external rotating magnet.

10. The spectrum measurement sample cell device according to claim 2, characterized in that: The sample cell body is made of fused quartz or glass.

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