A microelement detecting instrument

Abstract

The utility model provides a trace element detection instrument, include: collapsible turnover's casing, liquid supply mechanism contains the test tube of taking peristaltic pump, test tube establishes replaceable filter membrane, liquid level alarm sensor and modularization fixed base, reaction pool replacement mechanism realizes the elastic installation of reaction pool through the first elastic component of six way valve tail portion, optical measurement module detects excitation light signal through laser emitter, probe sensor and photoelectric sensor and converts into concentration data, six way valve connects flow rate measurement module, through glass tube and upper and lower sensor calculation liquid flow rate, waste liquid is arranged into the middle waste liquid pool through the waste liquid head linkage of pressing block. The utility model discloses through collapsible casing, elastic docking mechanism, low residual fluid control, real -time flow rate monitoring and automatic waste liquid treatment, has realized the high accuracy, high efficiency and high adaptability of detection process, is applicable to the multi -scene trace element analysis of clinical detection, environmental monitoring etc.

Description

Technical Field

[0001] This utility model relates to the field of environmental monitoring equipment technology, specifically to a trace element detection instrument. Background Technology

[0002] Elemental analysis is crucial in many fields such as environmental monitoring, biomedicine, and industrial production. It helps people understand the composition of substances, master the mechanism of chemical reactions, ensure product quality, and protect the ecological environment and human health. Although traditional elemental analysis methods can achieve certain detection goals, they are gradually lagging behind in terms of ease of operation, detection accuracy, environmental adaptability, and functional completeness, making it difficult to meet the current diverse and efficient detection demands.

[0003] Insufficiency of existing technology:

[0004] 1. Inconvenient operation and limited space: The structural design of most traditional trace element detection instruments is not sophisticated enough. They often cannot provide sufficient and flexible operating space during operation, and there is a lack of effective integration and utilization of space during the measurement process, which is not conducive to improving the smoothness and convenience of the detection operation.

[0005] 2. Light interference is a prominent problem: When detecting trace elements, external light interference often becomes a problem affecting the accuracy of measurement. Many existing instruments are not equipped with adequate light-shielding measures, resulting in poor accuracy of the detection results.

[0006] 3. Cumbersome installation and replacement of reaction cells: The installation methods of reaction cells in the existing technology are not convenient enough. They mostly use relatively fixed connections and lack flexible installation structures, which makes it time-consuming and laborious to replace reaction cells. Furthermore, improper installation may affect the detection accuracy and is not conducive to the rapid and efficient continuous detection tasks.

[0007] 4. Inadequate waste liquid management: Most instruments do not have a reasonable discharge, collection and monitoring mechanism for waste liquid generated during the testing process, which can easily cause waste liquid to overflow, pollute the instrument and experimental environment, and may also affect the testing process because the waste liquid is not detected in time.

[0008] 5. Lack of liquid flow rate measurement: Traditional trace element testing instruments often neglect the accurate measurement of liquid flow rate, which has an important impact on the stability and accuracy of the testing process. The lack of this function will make the control of the testing process less precise.

[0009] 6. High liquid residue and inconvenience in replacement: Some instruments have poorly designed valves and other components, resulting in high liquid residue. This wastes reagents and easily causes cross-contamination. At the same time, the components are difficult to replace, which is not conducive to the maintenance and long-term stable operation of the instrument.

[0010] Therefore, existing technologies have shortcomings and need further improvement. Utility Model Content

[0011] In view of the problems existing in the prior art, this utility model provides a trace element detection instrument.

[0012] To achieve the above objectives, the specific solution of this utility model is as follows:

[0013] This utility model provides a trace element detection instrument, including:

[0014] The housing consists of a box body, a front cover, a top cover, and an operation panel. The operation panel is installed on the front side of the box body. The front cover and top cover are foldable and flip-mounted on the front and top sides of the box body. They are opened during operation to expand the operating space and closed during measurement to save space and provide a fully light-proof sealed environment, reducing interference from external light on the measurement.

[0015] The liquid supply mechanism includes several test tubes mounted on the control panel, and each test tube is equipped with a peristaltic pump.

[0016] The reaction tank replacement mechanism includes the reaction tank, a six-way valve, and an optical fiber connector.

[0017] The six-way valve is movably mounted on the operation panel. The tail of the six-way valve is provided with a first elastic component. By pushing the six-way valve, the reaction tank is elastically installed between the fiber optic connector and the six-way valve by utilizing the action of the first elastic component.

[0018] The six-way valve is connected to the peristaltic pump of the liquid supply mechanism;

[0019] The optical measurement module includes a laser emitter, a probe sensor, and a photoelectric sensor. The laser emitter is connected to the optical fiber connector via an optical fiber. The probe sensor is installed inside the reaction cell, and the photoelectric sensor is installed on the side of the probe sensor. The photoelectric sensor is used to detect the excitation light signal in the reaction cell and convert it into concentration data.

[0020] Furthermore, the first elastic component includes a first spring, a movable shaft, and a fixed shaft;

[0021] The movable shaft is installed at the rear end of the six-way valve, one end of the fixed shaft is installed on the operation panel and the other end is inserted into the movable shaft. The first spring is located inside the movable shaft and elastically engages with the front end of the fixed shaft to achieve elastic engagement between the movable shaft and the fixed shaft.

[0022] Furthermore, a liquid outlet is provided on the side wall of the reaction tank, and a pressing block is provided below the liquid outlet;

[0023] The reaction tank is connected to the six-way valve, and silicone sealing rings are provided at the liquid outlet end of the reaction tank and the connection point of the pressing block.

[0024] A second elastic component is provided below the pressing block, and the pressing block is also equipped with a waste liquid head, which is connected to the reaction tank for discharging waste liquid.

[0025] Furthermore, the operation panel is equipped with a left fixing component and a right fixing component;

[0026] The left and right fixing components are respectively equipped with test tubes connected to the peristaltic pump.

[0027] Furthermore, a waste liquid pool is provided between the left and right fixing components to receive the waste liquid discharged from the waste liquid head, and a waste liquid full-capacity alarm is provided on the side wall of the waste liquid pool.

[0028] Furthermore, the test tube has a filter membrane outer sleeve at the upper opening, a filter membrane inner sleeve is stacked on top of the filter membrane outer sleeve, and a filter membrane is placed between the filter membrane inner sleeve and the filter membrane outer sleeve. Filter membranes with different pore sizes can be replaced according to different filtration needs. A test tube stopper is also provided at the upper opening of the filter membrane inner sleeve.

[0029] Furthermore, a liquid level alarm sensor is also installed on the side wall of the test tube.

[0030] Furthermore, the upper and lower ends of the test tube are respectively provided with a fixed upper seat and a fixed lower seat, which are used to install the test tube on the left fixed component or the right fixed component;

[0031] The fixed lower seat is provided with a liquid outlet for connecting the lower end of the test tube to the peristaltic pump.

[0032] Furthermore, the six-way valve is also connected to a flow rate measurement module and a peristaltic pump outlet;

[0033] The flow rate measurement module includes: a glass tube, an upper sensor, and a lower sensor;

[0034] The two ends of the glass tube are connected to a six-way valve and a waste liquid outlet via flexible hoses, the diameter of which is smaller than that of the glass tube.

[0035] The upper sensor and the lower sensor are mounted on the outer wall of the glass tube and are spaced apart along the axial direction of the glass tube.

[0036] The liquid being measured enters the glass tube from the bottom. The first time is recorded when the liquid reaches the lower sensor, and the second time is recorded when the liquid continues to rise and reaches the upper sensor. The time difference between the two times is obtained. The liquid volume is calculated based on the distance between the upper and lower sensors and the inner diameter of the glass tube, and the liquid flow rate is obtained.

[0037] Furthermore, the six-way valve has no valve core inside; each port is equipped with a one-way valve.

[0038] The liquid residue is ≤0.1μL and it is easy to replace.

[0039] The technical solution of this utility model has the following beneficial effects:

[0040] 1. Improved ease of operation

[0041] Flexible space utilization: The front and top covers can be folded and flipped. When opened, they can expand the operating space for convenient testing operations; when closed during measurement, they can save space, making it easier to store and move the instrument, thus improving the instrument's spatial adaptability and ease of operation.

[0042] Quick Reaction Cell Replacement: A first elastic component is set at the tail of the six-way valve. By pushing the six-way valve, the reaction cell can be flexibly installed between the fiber optic connector and the six-way valve, which realizes the quick installation and replacement of the reaction cell, improves the detection efficiency, and is especially suitable for detection scenarios that require frequent replacement of the reaction cell.

[0043] 2. Improved measurement accuracy

[0044] Effectively reduces light interference: When the front and top covers are closed, they provide a completely light-proof sealed environment for the instrument's interior, minimizing the interference of external light on the measurement. This improves the accuracy of the optical measurement module in detecting the excitation light signal and ensures the reliability of trace element concentration data.

[0045] Precise Flow Rate Measurement: The flow rate measurement module, through the setup of a glass tube, upper sensor, and lower sensor, can accurately measure liquid flow rate. Based on the time difference recorded by the sensors and relevant parameters, it calculates the liquid volume and flow rate, providing more accurate flow rate data for the detection process, which helps optimize detection conditions and improve detection accuracy.

[0046] Excellent sealing performance: Silicone sealing rings are installed at the connection between the reaction tank and the six-way valve, as well as at the connection between the liquid outlet of the reaction tank and the pressing block. This effectively prevents liquid leakage, ensures the stability of the detection process, and avoids measurement errors and instrument malfunctions caused by liquid leakage.

[0047] 3. Structural optimization and service life extension

[0048] Durable elastic components: The first elastic component adopts a structure of a first spring, a movable shaft, and a fixed shaft. The elastic connection between the movable shaft and the fixed shaft not only enables flexible installation of the reaction tank, but also the elasticity of the spring can buffer mechanical impact and extend the service life of related components.

[0049] Efficient waste liquid management: A waste liquid tank is set between the left and right fixed components on the operation panel to receive the waste liquid discharged from the waste liquid head. A waste liquid full alarm is set on the side wall of the waste liquid tank to remind the user to deal with the waste liquid in time, prevent waste liquid from overflowing and damaging the instrument, and also facilitate the maintenance of a clean laboratory environment.

[0050] The filter membrane is ingeniously designed: an outer filter membrane sleeve and an inner filter membrane sleeve are located at the top opening of the test tube, allowing filter membranes of different pore sizes to be placed between them. These can be replaced according to different filtration needs, improving the instrument's versatility and flexibility. Meanwhile, a test tube stopper at the top opening of the inner filter membrane sleeve prevents external impurities from entering the test tube, ensuring the purity of the sample being tested.

[0051] 4. Comprehensive detection functions

[0052] Powerful optical measurement capabilities: The optical measurement module includes a laser emitter, a probe sensor, and a photoelectric sensor. The laser emitter is connected to the optical fiber connector via an optical fiber. The probe sensor is installed inside the reaction cell, and the photoelectric sensor is installed on the side of the probe sensor. It can accurately detect the excitation light signal in the reaction cell and convert it into concentration data, thus achieving precise detection of trace elements.

[0053] Low liquid residue and easy replacement: The six-way valve has no internal valve core, and each port is equipped with a one-way valve, resulting in a liquid residue of ≤0.1μL, which is easy to replace. This design not only reduces reagent waste and lowers detection costs, but also effectively prevents liquid residue from interfering with subsequent detection, improving the accuracy of detection results, and facilitating instrument maintenance and cleaning.

[0054] 5. Enhanced safety and stability

[0055] Real-time liquid level monitoring: The liquid level alarm sensor installed on the side wall of the test tube can monitor the liquid level in the test tube in real time. When the liquid level is too low, an alarm signal will be issued in time to remind the user to add liquid, so as to avoid the instrument running dry or the test being interrupted due to insufficient liquid, thus ensuring the continuity and safety of the test process.

[0056] High overall stability: The instrument has a reasonable overall structural design, and the connections between the components are tight and stable. For example, the upper and lower ends of the test tube are respectively equipped with a fixed upper seat and a fixed lower seat, which are used to install it on the left or right fixed component. The liquid outlet of the fixed lower seat is connected to the peristaltic pump. This structural design ensures the stability of the entire liquid supply system and improves the reliability and stability of the instrument during the detection process. Attached Figure Description

[0057] Figure 1 This is a perspective view of the utility model in its open state;

[0058] Figure 2 This is a front view of the open state of this utility model;

[0059] Figure 3 This is a perspective view of the utility model in its closed state;

[0060] Figure 4This is a front view of the operation panel of this utility model;

[0061] Figure 5 This is a cross-sectional view of the present invention;

[0062] Figure 6 This invention relates to a quick-change structure for the reaction tank.

[0063] Attached image captions:

[0064] 1. Housing; 2. Front cover; 3. Top cover; 4. Control panel; 5. Test tube; 6. Peristaltic pump; 7. Reaction tank; 8. Six-way valve; 9. Fiber optic connector; 10. First elastic component; 11. First spring; 12. Movable shaft; 13. Fixed shaft; 14. Liquid outlet; 15. Pressing block; 16. Second elastic component; 17. Waste liquid head; 18. Left fixed component; 19. Right fixed component; 20. Waste liquid tank; 21. Waste liquid full volume alarm; 22. Filter membrane outer sleeve; 23. Filter membrane inner sleeve; 24. Filter membrane; 25. Test tube stopper; 26. Liquid level alarm sensor; 27. Fixed upper seat; 28. Fixed lower seat; 29. ​​Liquid outlet; 30. Flow rate measurement module; 31. Glass tube; 32. Upper sensor; 33. Lower sensor; 34. Liquid; 35. Fiber optic cable. Detailed Implementation

[0065] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0066] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0067] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0068] In the description of this embodiment, the terms "upper," "lower," "front," "rear," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0069] Combination Figures 1-6 As shown, this utility model provides a trace element detection instrument, comprising:

[0070] The housing consists of a box body 1, a front cover 2, an upper cover 3, and an operation panel 4. The operation panel 4 is installed on the front side of the box body 1. The front cover 2 and the upper cover 3 are foldable and flip-mounted on the front and upper sides of the box body 1. They are opened during operation to expand the operating space and closed during measurement to save space and provide a fully light-proof sealed environment, reducing interference from external light on the measurement.

[0071] The liquid supply mechanism includes several test tubes 5 installed on the operation panel 4, and each test tube 5 is equipped with a peristaltic pump 6.

[0072] The reaction tank replacement mechanism includes the reaction tank 7, a six-way valve 8, and an optical fiber connector 9.

[0073] The six-way valve 8 is movably mounted on the operation panel 4. The tail of the six-way valve 8 is provided with a first elastic component 10. By pushing the six-way valve 8, the reaction tank 7 is elastically installed between the fiber optic connector 9 and the six-way valve 8 using the action of the first elastic component 10.

[0074] The six-way valve 8 is connected to the peristaltic pump 6 of the liquid supply mechanism;

[0075] The optical measurement module includes a laser emitter, a probe sensor, and a photoelectric sensor. The laser emitter is connected to the fiber optic connector 9 via fiber optic cable 35. The probe sensor is installed inside the reaction cell 7, and the photoelectric sensor is installed on the side of the probe sensor. The photoelectric sensor is used to detect the excitation light signal in the reaction cell 7 and convert it into concentration data.

[0076] The first elastic component 10 includes a first spring 11, a movable shaft 12, and a fixed shaft 13;

[0077] The movable shaft 12 is installed at the rear end of the six-way valve 8. One end of the fixed shaft 13 is installed on the operation panel 4 and the other end is inserted into the movable shaft 12. The first spring 11 is located inside the movable shaft 12 and elastically engages with the front end of the fixed shaft 13 to achieve elastic engagement between the movable shaft 12 and the fixed shaft 13.

[0078] The reaction tank 7 is also provided with a liquid outlet 14 on its side wall, and a pressing block 15 is provided below the liquid outlet 14.

[0079] Silicone sealing rings are provided at the connection between the reaction tank 7 and the six-way valve 8, and at the connection between the liquid outlet 14 of the reaction tank 7 and the pressing block 15.

[0080] A second elastic component 16 is provided below the pressing block 15. The pressing block 15 is also equipped with a waste liquid head 17, which is connected to the reaction tank 7 and is used to discharge waste liquid.

[0081] The operation panel 4 is equipped with a left fixing component 18 and a right fixing component 19.

[0082] The left fixing component 18 and the right fixing component 19 are respectively equipped with test tubes 5 connected to the peristaltic pump 6.

[0083] A waste liquid tank 20 is provided between the left fixing component 18 and the right fixing component 19 to receive the waste liquid discharged from the waste liquid head 17. A waste liquid full volume alarm 21 is provided on the side wall of the waste liquid tank 20.

[0084] The test tube 5 has a filter membrane outer sleeve 22 at the upper opening, and a filter membrane inner sleeve 23 is stacked on top of the filter membrane outer sleeve 22. A filter membrane 24 is disposed between the filter membrane inner sleeve 23 and the filter membrane outer sleeve 22. The filter membrane 24 with different pore sizes can be replaced according to different filtration needs. A test tube stopper 25 is also provided at the upper opening of the filter membrane inner sleeve 23.

[0085] A liquid level alarm sensor 26 is also installed on the side wall of the test tube 5.

[0086] The upper end and lower end of the test tube 5 are respectively provided with a fixed upper seat 27 and a fixed lower seat 28, which are used to install the test tube 5 on the left fixed component 18 or the right fixed component 19.

[0087] The fixed lower seat 28 is provided with a liquid outlet 29 for connecting the lower end of the test tube 5 to the peristaltic pump 6.

[0088] The six-way valve 8 is also connected to a flow rate measurement module 30 and a peristaltic pump outlet.

[0089] The flow velocity measurement module 30 includes: a glass tube 31, an upper sensor 32, and a lower sensor 33;

[0090] The two ends of the glass tube 31 are connected to the six-way valve 8 and the waste liquid outlet via flexible hoses, and the diameter of the flexible hoses is smaller than the diameter of the glass tube 31.

[0091] The upper sensor 32 and the lower sensor 33 are mounted on the outer wall of the glass tube 31 and are spaced apart along the axial direction of the glass tube 31.

[0092] The liquid to be measured, 34, enters the glass tube 31 from below. The first time is recorded when the liquid 34 reaches the lower sensor 33. The second time is recorded when the liquid 34 continues to rise and reaches the upper sensor 32. The time difference between the two times is obtained. The liquid volume is calculated based on the distance between the upper sensor 32 and the lower sensor 33 and the inner diameter of the glass tube, and the liquid flow rate is obtained.

[0093] The six-way valve 8 has no valve core inside, and each interface is equipped with a one-way valve. The liquid residue is ≤0.1μL and it is easy to replace.

[0094] The principle of this utility model is as follows:

[0095] Foldable housing and fully light-proof sealed environment control

[0096] Operating space expansion: The housing consists of a box 1, a front cover 2, and a top cover 3. The front cover 2 and the top cover 3 can be folded and flipped. They can be unfolded during operation to expand the operating space and closed during measurement to form a fully enclosed structure, isolating external light source interference.

[0097] Optical signal protection: When closed, the operation panel 4 and the reaction cell 7 are in a completely light-proof environment, reducing stray light interference to the optical detection module (such as photoelectric sensor) and ensuring the accuracy of excitation light signal detection.

[0098] Multi-channel liquid supply and fluid control

[0099] Multi-tube liquid supply system: The liquid supply mechanism includes multiple independent test tubes 5, and the flow rate of each test tube 5 is individually controlled by a peristaltic pump 6, which supports parallel processing of multiple reagents / samples (such as simultaneous detection of elements such as iron, zinc, and copper).

[0100] Modular design of filter membrane: The upper end of test tube 5 is equipped with a filter membrane outer sleeve 22 + filter membrane inner sleeve 23 combination, and different pore sizes of filter membrane 24 (such as 0.22μm / 0.45μm) can be replaced to meet the pretreatment needs of protein separation, particle filtration and other applications.

[0101] Liquid level monitoring: The liquid level alarm sensor 26 on the side wall of test tube 5 monitors the remaining liquid level in real time to prevent the pump from running dry.

[0102] Rapid replacement and low residue control of reaction tank

[0103] Coreless six-way valve design: The six-way valve 8 has no traditional valve core structure inside. Each interface is equipped with a one-way valve. The valve body is pushed to elastically connect with the reaction tank 7 and the fiber optic connector 9 through the elastic component (first spring 11 + movable shaft 12), allowing for quick replacement of the reaction tank 7. The liquid residue is ≤0.1μL (the residue of traditional six-way valve is >0.5μL).

[0104] Fluid path switching: The six-way valve 8 connects to multiple peristaltic pumps 6. By moving the valve body, the fluid path is switched to achieve precise delivery of different reagents / samples to the reaction tank 7.

[0105] Sealing optimization: Silicone sealing rings are used at the connection between reaction tank 7 and six-way valve 8, and at the connection between liquid outlet 14 and pressing block 15 to prevent high-pressure fluid leakage.

[0106] Optical Detection and Signal Processing

[0107] Laser excitation and fiber optic transmission: The laser emitter transmits the excitation light to the reaction cell 7 through fiber optic cable 35, working in conjunction with the probe sensor to excite trace elements in the sample to generate characteristic spectra.

[0108] Dual-sensor detection mechanism:

[0109] Probe sensor: Real-time monitoring of the liquid state (such as temperature and mixing uniformity) in reaction tank 7;

[0110] Photoelectric sensor: detects the fluorescence or absorption spectrum of trace elements after excitation, converts the light signal into an electrical signal, and calculates the concentration data by combining the Lambert-Beer law.

[0111] Optical signal separation design: The laser emitter and the reaction cell 7 are isolated by optical fiber 35 to reduce the interference of heat source on optical detection.

[0112] Flow rate measurement and waste liquid treatment

[0113] Glass tube flow rate monitoring: Upper and lower sensors (upper sensor 32 and lower sensor 33) are installed at both ends of the glass tube 31 connected to the six-way valve 8. The flow rate is calculated by the liquid rise time difference (error <1%) to ensure accurate control of the reagent volume in the reaction tank 7.

[0114] Automated waste liquid discharge: Waste liquid from reaction tank 7 is directed to waste liquid tank 20 via pressing block 15 and second elastic component 16. Waste liquid full volume alarm 21 automatically indicates the capacity status, reducing manual intervention.

[0115] The above description is only a preferred embodiment of the present utility model and does not limit the scope of the present utility model. All equivalent structural transformations made under the present utility model concept and based on the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the protection scope of the present utility model.

Claims

1. A trace element detection instrument, characterized in that, include: The housing consists of a box body, a front cover, a top cover, and an operation panel. The operation panel is installed on the front side of the box body. The front cover and top cover are foldable and flip-mounted on the front and top sides of the box body. They are opened during operation to expand the operating space and closed during measurement to save space and provide a fully light-proof sealed environment, reducing interference from external light on the measurement. The liquid supply mechanism includes several test tubes mounted on the control panel, and each test tube is equipped with a peristaltic pump. The reaction tank replacement mechanism includes the reaction tank, a six-way valve, and an optical fiber connector. The six-way valve is movably mounted on the operation panel. The tail of the six-way valve is provided with a first elastic component. By pushing the six-way valve, the reaction tank is elastically installed between the fiber optic connector and the six-way valve by utilizing the action of the first elastic component. The six-way valve is connected to the peristaltic pump of the liquid supply mechanism; The optical measurement module includes a laser emitter, a probe sensor, and a photoelectric sensor. The laser emitter is connected to the optical fiber connector via an optical fiber. The probe sensor is installed inside the reaction cell, and the photoelectric sensor is installed on the side of the probe sensor. The photoelectric sensor is used to detect the excitation light signal in the reaction cell and convert it into concentration data.

2. The trace element detection instrument according to claim 1, characterized in that, The first elastic component includes a first spring, a movable shaft, and a fixed shaft; The movable shaft is installed at the rear end of the six-way valve, one end of the fixed shaft is installed on the operation panel and the other end is inserted into the movable shaft. The first spring is located inside the movable shaft and elastically engages with the front end of the fixed shaft to achieve elastic engagement between the movable shaft and the fixed shaft.

3. The trace element detection instrument according to claim 1, characterized in that, The reaction tank is also provided with a liquid outlet end on its side wall, and a pressing block is provided below the liquid outlet end. The reaction tank is connected to the six-way valve, and silicone sealing rings are provided at the liquid outlet end of the reaction tank and the connection point of the pressing block. A second elastic component is provided below the pressing block, and the pressing block is also equipped with a waste liquid head, which is connected to the reaction tank for discharging waste liquid.

4. The trace element detection instrument according to claim 3, characterized in that, The operation panel is equipped with a left fixing component and a right fixing component; The left and right fixing components are respectively equipped with test tubes connected to the peristaltic pump.

5. The trace element detection instrument according to claim 4, characterized in that, A waste liquid tank is provided between the left and right fixing components to receive the waste liquid discharged from the waste liquid head. A waste liquid full-capacity alarm is provided on the side wall of the waste liquid tank.

6. The trace element detection instrument according to claim 3, characterized in that, The test tube has a filter membrane outer sleeve at the upper opening, a filter membrane inner sleeve is stacked on top of the filter membrane outer sleeve, and a filter membrane is placed between the filter membrane inner sleeve and the filter membrane outer sleeve. The filter membrane with different pore sizes can be replaced according to different filtration needs. A test tube stopper is also provided at the upper opening of the filter membrane inner sleeve.

7. The trace element detection instrument according to claim 4, characterized in that, A liquid level alarm sensor is also installed on the side wall of the test tube.

8. The trace element detection instrument according to claim 4, characterized in that, The test tube is provided with a fixed upper seat and a fixed lower seat at its upper and lower ends, respectively, for mounting the test tube on the left fixed component or the right fixed component; The fixed lower seat is provided with a liquid outlet for connecting the lower end of the test tube to the peristaltic pump.

9. The trace element detection instrument according to claim 1, characterized in that, The six-way valve is also connected to a flow rate measurement module and a peristaltic pump outlet. The flow rate measurement module includes: a glass tube, an upper sensor, and a lower sensor; The two ends of the glass tube are connected to a six-way valve and a waste liquid outlet via flexible hoses, the diameter of which is smaller than that of the glass tube. The upper sensor and the lower sensor are mounted on the outer wall of the glass tube and are spaced apart along the axial direction of the glass tube. The liquid being measured enters the glass tube from the bottom. The first time is recorded when the liquid reaches the lower sensor, and the second time is recorded when the liquid continues to rise and reaches the upper sensor. The time difference between the two times is obtained. The liquid volume is calculated based on the distance between the upper and lower sensors and the inner diameter of the glass tube, and the liquid flow rate is obtained.

10. The trace element detection instrument according to claim 1, characterized in that, The six-way valve has no valve core inside; each port is equipped with a one-way valve. The liquid residue is ≤0.1μL and it is easy to replace.

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