Novel single-light-path photometer reaction tank device
By introducing reflective mirror surfaces and rotating devices into the single-optical photometer, multiple reflections of the light source pass through the sample and clearing contaminants through the upward airflow, the problem of insufficient sensitivity when measuring low-concentration samples is solved, and the detection sensitivity and measurement stability are significantly improved.
Patent Information
- Application Number
- CN202420935393.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-30
- Publication Date
- 2025-04-25
- Estimated Expiration
- 2034-04-30
AI Technical Summary
Single-optical photometers have insufficient sensitivity when measuring low-concentration samples, making it difficult for the measurement results to accurately reflect the true concentration of the sample.
A new single-optical photometer reaction cell device is designed. By setting a reflective mirror surface and a rotating device in the optical path, multiple reflections of the light source pass through the sample, increasing the passing distance of light in the sample, and removing contaminants on the sample surface through upward airflow.
It significantly improves the detection sensitivity of low-concentration samples, enhances the absorption signal, reduces the impact of light source fluctuations on the measurement results, and improves the stability and repeatability of the measurement.
Smart Images
Figure CN222800591U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of photometers, in particular to a novel single-light path photometer reaction pool device. Background Art
[0002] The reaction cell device of the photometer, also known as a cuvette or a cuvette, is a key component in the photometer. The main function of this device is to serve as a container for the sample solution and the reference solution, allowing the light beam to pass through and measure its absorbance. The reaction cell device is usually made of transparent materials such as glass or quartz, which have good transmittance to light in a specific wavelength range. When performing photometric measurements, the sample solution and the reference solution are placed in the reaction cell respectively, and then the solutions are irradiated with light emitted by the light source of the photometer. After the light passes through the solution, its intensity will change, and this change is proportional to the concentration of the substance to be measured in the solution. By measuring this change in light intensity, the concentration of the substance to be measured in the solution can be quantitatively determined. A single-path photometer is a photometer that uses a single light source and light path for measurement. In this photometer, the light signal emitted by the light source passes through the sample or is reflected from the surface of the sample, and is received by the detector and converted into a measurable signal. Since only one light path is used, its structure is relatively simple and the manufacturing cost is relatively low.
[0003] Compared with dual-path or multi-path photometers, single-path photometers do have certain limitations in structure. In some cases, especially when measuring low-concentration samples, they may expose insufficient sensitivity. Low-concentration samples often produce very weak optical signals due to their low material content. In a single-path photometer, this weak signal needs to pass through the sample before being captured by the detector and converted into readable data. Since there is only one optical path, any scattering, absorption or loss in the optical path may cause the already weak signal to further attenuate, making it difficult for the final measurement result to accurately reflect the true concentration of the sample. Utility Model Content
[0004] (I) Technical problems solved: In view of the deficiencies of the prior art, the utility model provides a novel single-path photometer reaction cell device, which has the advantage of being able to detect low-concentration samples to be tested, thereby solving the problem of low sensitivity of the single-path photometer to low-concentration samples.
[0005] (II) Technical solution: In order to achieve the above-mentioned purpose of being able to detect low-concentration samples to be tested, the utility model provides the following technical solution: a novel single-light path photometer reaction cell device, comprising a detection box body and a cuvette, a movable guide rail is provided in the middle of the bottom of the detection box body, the cuvette is arranged above the movable guide rail and can move on the movable guide rail, a light source assembly and a detection light assembly are respectively provided on both sides of the cuvette and on the inner wall of the detection box body, the light source assembly is composed of a light source emitting device and a reflecting mirror, and the detection light assembly is composed of a light source receiving device and a reflecting mirror, the light emitted by the light source emitting device first passes through a monochromator, passes through the sample in the cuvette, and is irradiated on the reflecting mirror in the detection light assembly for reflection, the reflected light passes through the sample again and is irradiated on the reflecting mirror in the light source assembly, so that the light source is reflected and passes through the sample again, and after repeated reflections, it is finally irradiated on the light source receiving device in the detection light assembly, and the light source receiving device records the light intensity and the number of light reflections on the reflecting mirror.
[0006] A rotating device is provided on the back of the reflecting mirror, and the rotating device can adjust the inclination angle of the reflecting mirror. By adjusting the inclination angle, it is avoided that the light is refracted when passing through the sample, resulting in failure to correctly irradiate the light source receiving device.
[0007] An air inlet is provided at the bottom of the detection box body, and an air outlet is provided on the inner side of the detection box body. The air outlet is connected to an air pump to extract the air in the detection box body, and external air enters from the air inlet to form a flowing airflow.
[0008] A dehumidification screen is provided in the air inlet to prevent dust and moisture from the external environment from entering, thereby ensuring a dry and dust-free environment inside.
[0009] A rubber pad is provided under the cuvette, and the vibration of the device itself is transmitted to the sample, causing the sample to shake, resulting in deviation in the detection.
[0010] (III) Beneficial effects: Compared with the prior art, the utility model provides a novel single-light path photometer reaction cell device, which has the following beneficial effects:
[0011] 1. The novel single-path photometer reaction cell device, the light emitted by the light source emitting device first passes through the monochromator, passes through the sample in the cuvette, and is irradiated on the reflective mirror in the detection light component to be reflected. The reflected light passes through the sample again and is irradiated on the reflective mirror in the light source component, so that the light source is reflected again and passes through the sample. After repeated reflections, it is finally irradiated on the light source receiving device in the detection light component. The light source receiving device records the light intensity and the number of light reflections on the reflective mirror. By reflecting the light source through the sample multiple times through the reflective mirror, the distance that the light passes through the sample, that is, the optical path length, can be significantly increased, which means that more photons interact with the substances in the sample, thereby increasing the chance of absorption. For low-concentration samples or substances with weak absorption, increasing the optical path length can improve the detection sensitivity, making it easier for weak absorption signals to be captured by the detector. It is found that in a single-path photometer, the fluctuation of the light source may interfere with the measurement results. Through multiple reflections, the fluctuation of the light source is averaged throughout the optical path, reducing its impact on the measurement results, which helps to improve the stability and repeatability of the measurement. As the optical path length increases, more photons are absorbed by the sample, thereby enhancing the absorption signal, which can improve the signal-to-noise ratio and make the measurement results more accurate and reliable. Stronger signals are also easier to be identified and measured by the detector, reducing the requirements for instrument sensitivity. Compared with designs using multiple light sources or multiple optical paths, using reflective mirrors to achieve multiple reflections of the light source can simplify the optical path design. This design reduces the number and complexity of optical components, reduces the cost and manufacturing difficulty of the instrument, and at the same time, fewer components also mean fewer potential sources of error, which helps to improve measurement accuracy.
[0012] 2. The novel single-path photometer reaction cell device is provided with an air inlet at the bottom of the detection box body and an air outlet on the inner side of the detection box body. The air outlet is connected to the vacuum pump to extract the air in the detection box body, and the external gas enters from the air inlet to form a flowing airflow. The flow direction of the airflow is upward. The upward airflow can effectively blow away the dust, particles or other pollutants attached to the surface of the sample. These pollutants may not only affect the transmittance of light, but also interfere with the measurement results. By reducing the presence of these pollutants, the accuracy and stability of the measurement can be improved. In some applications, the humidity on the sample surface may affect the measurement results. The upward airflow can help control the humidity on the sample surface and prevent moisture condensation or water droplet formation, thereby keeping the sample surface dry and stable. This is particularly important for experiments that require precise control of humidity conditions. At the same time, a low-pressure environment is formed outside the sample due to the gas flow, so that the bubbles in the sample are dispersed and their presence in the optical path is reduced, which helps to reduce the interference of bubbles on the measurement results. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 It is a schematic diagram of the structure of the utility model;
[0014] Figure 2 It is a cutaway schematic diagram of the utility model.
[0015] In the figure: 1, detection box body; 11, moving guide rail; 12, cuvette; 13, air inlet; 14, air outlet; 21, light source assembly; 22, detection light assembly; 121, rubber pad; 201, rotating device; 202, reflecting mirror; 211, light source emitting device; 221, light source receiving device. DETAILED DESCRIPTION
[0016] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0017] See also Figure 1-Figure 2 A novel single-light path photometer reaction cell device comprises a detection box body 1 and a cuvette 12, wherein a movable guide rail 11 is provided in the middle of the bottom of the detection box body 1, and the cuvette 12 is arranged above the movable guide rail 11 and can move on the movable guide rail 11, and a light source assembly 21 and a detection light assembly 22 are respectively provided on both sides of the cuvette 12 and on the inner wall of the detection box body 1, wherein the light source assembly 21 is composed of a light source emitting device 211 and a reflecting mirror 202, and the detection light assembly 22 is composed of a light source receiving device 221 and a reflecting mirror 202, and the light emitted by the light source emitting device 211 first passes through a monochromator, passes through a sample in the cuvette 12, and is irradiated on the reflecting mirror 202 in the detection light assembly 22 to be reflected, and the reflected light passes through the sample again to be irradiated on the reflecting mirror 202 in the light source assembly 21, so that the light source It is reflected again through the sample, and after repeated reflections, it finally irradiates the light source receiving device 221 in the detection light component 22. The light source receiving device 221 records the light intensity and the number of light reflections on the reflective mirror 202. By reflecting the light source multiple times through the sample through the reflective mirror 202, the distance the light passes through the sample, that is, the optical path length, can be significantly increased. This means that more photons interact with the substances in the sample, thereby increasing the chance of absorption. For low-concentration samples or substances with weaker absorption, increasing the optical path length can improve the detection sensitivity, making it easier for weak absorption signals to be captured by the detector. In a single-path photometer, the fluctuation of the light source may interfere with the measurement results. Through multiple reflections, the fluctuation of the light source is averaged throughout the optical path, reducing its impact on the measurement results, which helps to improve the stability and repeatability of the measurement.
[0018] A rotating device 201 is provided on the back of the reflecting mirror 202 , and the rotating device 201 can adjust the tilt angle of the reflecting mirror 202 . By adjusting the tilt angle, it is avoided that the light is refracted when passing through the sample, resulting in failure to correctly illuminate the light source receiving device 221 .
[0019] An air inlet 13 is provided at the bottom of the detection box body 1, and an air outlet 14 is provided on the inner side of the detection box body 1. The air outlet 14 is connected to the vacuum pump to extract the air in the detection box body 1, and the external air enters from the air inlet 13 to form a flowing airflow. The flow direction of the airflow is upward. The upward airflow can effectively blow away the dust, particles or other pollutants attached to the surface of the sample. These pollutants may not only affect the transmittance of light, but also may interfere with the measurement results. By reducing the presence of these pollutants, the accuracy and stability of the measurement can be improved. In some applications, the humidity on the sample surface may affect the measurement results. The upward airflow can help control the humidity on the sample surface and prevent moisture condensation or water droplet formation, thereby keeping the sample surface dry and stable. This is particularly important for experiments that require precise control of humidity conditions. At the same time, a low-pressure environment is formed outside the sample due to the gas flow, so that the bubbles in the sample are dispersed and their presence in the light path is reduced, which helps to reduce the interference of bubbles on the measurement results.
[0020] The air inlet 13 is provided with a dehumidification screen to prevent dust and moisture from the external environment from entering, thereby ensuring a dry and dust-free environment inside.
[0021] A rubber pad 121 is provided under the cuvette 12, and the vibration of the device itself is transmitted to the sample, causing the sample to shake, resulting in deviation in detection.
[0022] Working principle: Prepare the sample to be tested, make sure the sample is in a state suitable for measurement, place the sample in the cuvette 12 in the detection box body 1, close the lid of the detection box body 1, and place the sample in a dim environment. The light source emitting device 211 emits visible light and passes through a monochromator to decompose the composite light into light of a single wavelength. The light then passes through the sample. When the light passes through the sample, the substance in the sample absorbs part of the light, and the amount absorbed depends on the concentration of the substance and the wavelength of the light. The light is then irradiated to the reflective mirror surface 202 in the detection light assembly 22 on the other side of the detection box body 1 to generate reflection. The reflected light passes through the sample again and irradiates the reflective mirror surface 202 in the light source assembly 21. The light is reflected by the reflecting mirror 202 on both sides so as to pass through the sample again. The light is reflected multiple times in the reflecting mirrors 202 on both sides and finally reflected into the light source receiving device 221. The light absorption amount and the number of reflections are recorded. When the light source of the single-path photometer is reflected multiple times through the sample by the reflecting mirror 202, each reflection increases the chance of interaction between the light and the sample material. For samples with low concentration or weak absorption, such multiple interactions significantly increase the absorption probability of photons, thereby enhancing the absorption signal. For certain samples with specific absorption peaks, multiple reflections can ensure that the light covers a wider wavelength range when passing through the sample, which helps to capture the absorption characteristics more comprehensively.
[0023] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.
[0024] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A novel single-light path photometer reaction cell device, comprising a detection box (1) and a cuvette (12), characterized in that: A movable guide rail (11) is provided in the middle of the bottom of the detection box body (1); the cuvette (12) is arranged above the movable guide rail (11) and is movable on the movable guide rail (11); a light source assembly (21) and a detection light assembly (22) are provided on both sides of the cuvette (12) and on the inner wall of the detection box body (1); the light source assembly (21) is composed of a light source emitting device (211) and a reflecting mirror (202); the detection light assembly (22) is composed of a light source receiving device (221) and a reflecting mirror (202); the light source emitting device (211) and the detecting light assembly (22) are respectively provided on the inner wall of the detection box body (1); A monochromator is provided in the device (211), and the light emitted by the monochromator first passes through the monochromator, then passes through the sample in the cuvette (12), and is irradiated onto the reflective mirror (202) in the detection light component (22) for reflection. The reflected light passes through the sample again and is irradiated onto the reflective mirror (202) in the light source component (21), so that the light source is reflected again and passes through the sample. After repeated reflections, the light is finally irradiated onto the light source receiving device (221) in the detection light component (22), and the light source receiving device (221) records the light intensity and the number of light reflections on the reflective mirror (202).
2. A novel single light path photometer reaction cell device according to claim 1, characterized in that: A rotating device (201) is provided on the back of the reflecting mirror surface (202), and the rotating device (201) is capable of adjusting the inclination angle of the reflecting mirror surface (202).
3. A novel single light path photometer reaction cell device according to claim 1, characterized in that: The bottom of the detection box body (1) is provided with an air inlet (13), and the inner side of the detection box body (1) is provided with an air outlet (14), and the air outlet (14) is connected to an air pump to extract the air in the detection box body (1), and external air enters through the air inlet (13), thereby forming a flowing airflow.
4. A novel single light path photometer reaction cell device according to claim 3, characterized in that: A dehumidification gauze is provided in the air inlet (13).
5. A novel single light path photometer reaction cell device according to claim 1, characterized in that: A rubber pad (121) is provided below the cuvette (12).