Liquid sample atomization device applied to direct mass spectrometry of selenium compound

Abstract

The utility model relates to the technical field of selenium detection devices, and particularly discloses a liquid sample atomization device applied to direct mass spectrometry of selenium compounds, which is characterized in that a first one-way valve is fixedly mounted in one end, close to a small air compressor, of a first conveying pipe, and a second conveying pipe is fixedly mounted at the top of the first conveying pipe; a second one-way valve is fixedly installed in the end, away from the first conveying pipe, of the second conveying pipe, a third conveying pipe is fixedly installed on the side wall of the second conveying pipe, a third one-way valve is fixedly installed in the end, close to the second conveying pipe, of the third conveying pipe, and a fourth conveying pipe is fixedly installed at the top of the third one-way valve. The first one-way valve controls the flow direction of the selenium-containing solution in the first conveying pipe and prevents the selenium-containing solution from flowing back, so that the accurate solution transfer and control ensure that the selenium-containing solution can stably and accurately enter the reaction cavity for detection, solution leakage or wrong transfer is avoided, the detection accuracy and stability are improved, the detection error is reduced, and the detection efficiency is improved. And reliable sample conveying guarantee is provided for selenium detection.

Description

Technical Field

[0001] This utility model relates to the technical field of selenium detection devices, and in particular to a liquid sample atomization device for direct mass spectrometry analysis of selenium compounds. Background Technology

[0002] In the field of selenium detection, accurate and efficient acquisition and processing of selenium-containing samples are crucial to ensuring the reliability of test results. However, existing selenium detection equipment has many shortcomings in the sample delivery process, which seriously affects the accuracy and stability of the detection.

[0003] Traditional methods for transporting selenium samples are often rudimentary and lack precise control mechanisms. For example, some devices use open pouring or pumping methods, which make it difficult to accurately control the flow direction and volume of the solution, easily leading to leakage. This not only wastes samples but may also contaminate the testing environment and interfere with the test results. Moreover, due to the lack of effective unidirectional flow control, backflow may occur during transport, causing different batches of samples to mix and increasing detection errors. Utility Model Content

[0004] To address the shortcomings of existing technologies, this invention provides a liquid sample nebulization device for direct mass spectrometry analysis of selenium compounds, thereby solving the technical problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A liquid sample nebulization device for direct mass spectrometry analysis of selenium compounds includes a base. A liquid extraction mechanism is fixedly installed on the top of the base. The liquid extraction mechanism includes a small air compressor, which is fixedly installed on the top of the base. A first delivery tube is fixedly installed at the left output end of the small air compressor. A first one-way valve is fixedly installed inside the end of the first delivery tube near the small air compressor. A second delivery tube is fixedly installed on the top of the first delivery tube. A second one-way valve is fixedly installed inside the end of the second delivery tube away from the first delivery tube. A third delivery tube is fixedly installed on the side wall of the second delivery tube. A third one-way valve is fixedly installed inside the end of the third delivery tube near the second delivery tube. A fourth delivery tube is fixedly installed on the top of the third one-way valve. A vacuum breaking valve is fixedly installed on the side wall of the fourth delivery tube. A fifth delivery tube is fixedly installed on the top of the fourth delivery tube. A sixth delivery tube is fixedly installed at the end away from the fourth delivery tube.

[0007] Preferably, a pneumatic nozzle is fixedly installed at one end of the first conveying pipe near the threaded disc, a fixing pipe is fixedly installed on the side wall of the third conveying pipe, and the end of the fixing pipe away from the third conveying pipe is fixedly installed with the second conveying pipe.

[0008] Preferably, a threaded disc is fixedly installed at the end of the first delivery pipe away from the small air compressor, and a reaction chamber is installed inside the threaded disc.

[0009] Preferably, the side wall of the reaction chamber is provided with an air outlet, and a threaded rod is slidably installed inside the air outlet.

[0010] Preferably, a spring rod is fixedly installed on the side wall of the threaded rod, and a sealing disc is fixedly installed on the end of the spring rod away from the threaded rod.

[0011] Preferably, a threaded sleeve is threadedly installed on the side wall of the threaded rod, and a sliding plate is rotatably installed on the side wall of the threaded sleeve, the sliding plate being slidably installed inside the base.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] I. The device utilizes the negative pressure generated by a small air compressor, combined with the configuration of various delivery pipes and one-way valves, to achieve the transfer of selenium-containing solution along a specific path. The second one-way valve prevents air from being drawn out of the second delivery pipe, allowing air and selenium-containing solution to be smoothly drawn out of the third delivery pipe. The third one-way valve prevents the selenium-containing solution from flowing out of the third delivery pipe again. The first one-way valve controls the flow direction of the selenium-containing solution in the first delivery pipe, preventing backflow. This precise solution transfer and control ensures that the selenium-containing solution can stably and accurately enter the reaction chamber for detection, avoiding solution leakage or mis-transfer, improving the accuracy and stability of detection, reducing detection errors, and providing a reliable sample delivery guarantee for selenium detection.

[0014] 2. The reaction chamber is connected to the first delivery pipe via a threaded disc and is equipped with a waste gas discharge structure consisting of a threaded rod, a spring rod, and a sealing disc. When the experiment ends, the reaction chamber is filled with air by repeating the operation, and the air pressure pushes the sealing disc to the right to discharge the waste gas. If the reaction chamber needs to be replaced, simply rotate the threaded sleeve counterclockwise to disengage it from the threaded rod, causing the sliding plate to slide, and then rotate the reaction chamber counterclockwise to complete the disassembly. This design facilitates the maintenance and replacement of the reaction chamber, ensures the long-term stable operation of the device, and timely discharge of waste gas helps to keep the inside of the reaction chamber clean, reduces interference with subsequent detection, and improves the service life and detection efficiency of the device. Attached Figure Description

[0015] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0017] Figure 2 This is a structural diagram of the reaction chamber of this utility model;

[0018] Figure 3 This is a structural diagram of the second conveying pipe of this utility model;

[0019] Figure 4 This is a structural diagram of the threaded sleeve of this utility model.

[0020] Legend: 11. Base; 12. Small air compressor; 13. First delivery pipe; 14. First one-way valve; 15. Second delivery pipe; 16. Second one-way valve; 17. Third delivery pipe; 18. Third one-way valve; 19. Fourth delivery pipe; 21. Vacuum breaker valve; 22. Fifth delivery pipe; 23. Sixth delivery pipe; 24. Fixed pipe; 25. Threaded disc; 26. Reaction chamber; 27. Air outlet; 28. Threaded rod; 29. ​​Spring rod; 31. Sealing disc; 32. Threaded sleeve; 33. Sliding plate. Detailed Implementation

[0021] The preferred embodiments of this utility model will be described in detail with reference to the accompanying drawings. However, the present invention can also be implemented in various different forms, and therefore the present invention is not limited to the embodiments described below.

[0022] The technical solutions in this application are intended to address the problems described in the background section, and the overall approach is as follows. Example

[0023] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown in the figure, this embodiment introduces a liquid sample nebulization device for direct mass spectrometry analysis of selenium compounds provided by the present invention. It includes a base 11, a selenium-containing solution placed at the bottom of a third delivery tube 17, so that the selenium-containing solution soaks the third delivery tube 17, a small air compressor 12 fixedly installed on the top of the base 11, and the small air compressor 12 is started to draw in air. A first delivery tube 13 is fixedly installed on the left output end of the small air compressor 12, and the small air compressor 12 draws in air from the inside of a sixth delivery tube 23. A first one-way valve 14 is fixedly installed inside the end of the first delivery tube 13 near the small air compressor 12, and the sixth delivery tube 23 draws in air from the inside of a fifth delivery tube 22.

[0024] A second conveying pipe 15 is fixedly installed at the top of the first conveying pipe 13. The fifth conveying pipe 22 will draw air from the inside of the fourth conveying pipe 19. A second one-way valve 16 is fixedly installed inside the end of the second conveying pipe 15 away from the first conveying pipe 13. Because the second one-way valve 16 is installed inside the second conveying pipe 15, the air inside the second conveying pipe 15 cannot be drawn out. A third conveying pipe 17 is fixedly installed on the side wall of the second conveying pipe 15. At this time, the air inside the third conveying pipe 17 will be drawn out. A third one-way valve 18 is fixedly installed inside the end of the third conveying pipe 17 close to the second conveying pipe 15. Because the third conveying pipe 17 is immersed in the selenium-containing solution, the selenium-containing solution will be drawn out as well. The top of the third one-way valve 18... A fourth delivery pipe 19 is fixedly installed. When the selenium-containing solution reaches the inside of the fourth delivery pipe 19, due to the large negative pressure inside the fourth delivery pipe 19, the vacuum breaking valve 21 (when the pressure inside the container or pipeline is lower than the design vacuum pressure, the spring installed on the valve disc will cause the valve disc to open vertically downwards, automatically opening to draw in air and break the vacuum inside the pipeline; when the pressure inside the container or pipeline reaches the predetermined value, the valve disc is pushed up by the air pressure and automatically closes. A pipe is connected to the side wall of the vacuum breaking valve 21, and the pipe is connected to the nitrogen tank, so that what is drawn in will no longer be air, but nitrogen) will automatically open. The vacuum breaking valve 21 is fixedly installed on the side wall of the fourth delivery pipe 19. At this time, the selenium-containing solution will fall into the second delivery pipe 15.

[0025] A fifth delivery pipe 22 is fixedly installed at the top of the fourth delivery pipe 19. The second one-way valve 16 will also open, allowing the selenium-containing solution to fall into the first delivery pipe 13. A sixth delivery pipe 23 is fixedly installed at the end of the fifth delivery pipe 22 furthest from the fourth delivery pipe 19. Because the first one-way valve 14 is installed inside the first delivery pipe 13, the selenium-containing solution will be blocked again. A fixed pipe 24 is fixedly installed on the side wall of the third delivery pipe 17. A third one-way valve 18 is also installed inside the third delivery pipe 17, preventing the selenium-containing solution from flowing out of the third delivery pipe 17. A pneumatic atomizing nozzle (using compressed air or other gas mixed with liquid inside the nozzle, the shear force generated by the high-speed gas flow disperses the liquid into fine droplets) is fixedly installed at the end of the first delivery pipe 13 near the threaded disc 25. The fixed pipe 24 furthest from the third delivery pipe 17 is fixedly installed with the second delivery pipe 15. At this time, the small... Compressed air is discharged from the small air compressor 12. The small air compressor 12 transmits the compressed air to the first delivery pipe 13. A threaded disc 25 is fixedly installed at the end of the first delivery pipe 13 away from the small air compressor 12. At this time, the first one-way valve 14 will be opened, so that the selenium-containing solution inside the first delivery pipe 13 will be quickly discharged and atomized. Then, it will be detected by electroionization through the reaction chamber 26 (the ion source can be a DART ion source, ESI ion source, DBDI ion source, or plasma source). The reaction chamber 26 is threaded inside the threaded disc 25. When the experiment ends, the selenium-containing solution is removed from the bottom of the third delivery pipe 17 and the above operation is repeated. The reaction chamber 26 will be filled with air. An air outlet 27 is opened on the side wall of the reaction chamber 26. At this time, the sealing disc 31 will be forced to move to the right. The sealing disc 31 drives the spring rod 29 to be compressed.

[0026] It should be noted that this device is a liquid sample nebulizer for direct mass spectrometry analysis of selenium compounds. The reaction chamber 26 is not the focus of improvement of this device. How to detect selenium compounds by ionization is a well-known technology and will not be elaborated on here.

[0027] A threaded rod 28 is slidably installed inside the vent 27. When the sealing disc 31 moves to the right side of the vent 27, the waste gas inside the reaction chamber 26 will be discharged. A spring rod 29 is fixedly installed on the side wall of the threaded rod 28. When the reaction chamber 26 needs to be replaced, the threaded sleeve 32 is rotated counterclockwise, and the threaded sleeve 32 will disengage from the side wall of the threaded rod 28. The end of the spring rod 29 away from the threaded rod 28 is fixedly installed with the sealing disc 31. The threaded sleeve 32 will also drive the sliding plate 33 to slide from left to right. The threaded sleeve 32 is threadedly installed on the side wall of the threaded rod 28. Then, the reaction chamber 26 is rotated counterclockwise, and the reaction chamber 26 will disengage from the inside of the threaded disc 25, completing the disassembly of the reaction chamber 26. The sliding plate 33 is rotatably installed on the side wall of the threaded sleeve 32. The sliding plate 33 is slidably installed inside the base 11.

[0028] Working principle: A selenium-containing solution is placed at the bottom of the third delivery pipe 17 and immersed in the pipe. The small air compressor 12 on the top of the base 11 is started. The small air compressor 12 draws air from the sixth delivery pipe 23 through the first delivery pipe 13, and then sequentially through the fifth delivery pipe 22 and the fourth delivery pipe 19. Because the second delivery pipe 15 is equipped with a second one-way valve 16, the air inside cannot be drawn out, causing the air inside the third delivery pipe 17 to be drawn out. Since the third delivery pipe 17 is immersed in the selenium-containing solution, the selenium-containing solution is drawn out along with the air. When the selenium-containing solution reaches the fourth delivery pipe 19, due to the large negative pressure inside the pipe, the vacuum breaking valve 21 automatically opens, and the selenium-containing solution falls into the second delivery pipe 15. After the selenium-containing solution falls from the fourth delivery pipe 19 into the second delivery pipe 15, the second one-way valve 16 opens, and the solution continues to fall into the first delivery pipe 13. However, because the first one-way valve 14 is installed inside the first delivery pipe 13, the selenium-containing solution is blocked and cannot flow back. At the same time, the third delivery pipe 17... An internally installed third check valve 18 prevents the selenium-containing solution from flowing out of the third delivery pipe 17 again;

[0029] Compressed air is discharged from the small air compressor 12 and transmitted to the first delivery pipe 13. The first one-way valve 14 is opened, and the selenium-containing solution in the first delivery pipe 13 is quickly discharged and atomized. Then, the selenium-containing solution atomizes and enters the reaction chamber 26 connected to the first delivery pipe 13 through the threaded disc 25. Electro-ion detection is performed in the reaction chamber 26. After the experiment ends, the selenium-containing solution at the bottom of the third delivery pipe 17 is removed. The previous operation is repeated to fill the reaction chamber 26 with air. At this time, the sealing disc 31 is moved to the right by the force, which drives the spring rod 29 to compress. When the sealing disc 31 moves to the right side of the air outlet 27, the waste gas in the reaction chamber 26 is discharged. If the reaction chamber 26 needs to be replaced, first rotate the threaded sleeve 32 counterclockwise to disengage it from the threaded rod 28. The threaded sleeve 32 drives the sliding plate 33 to slide from left to right in the base 11. Then rotate the reaction chamber 26 counterclockwise to disengage it from the threaded disc 25 to complete the disassembly of the reaction chamber 26.

[0030] Finally, it should be noted that the above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A liquid sample nebulization device for direct mass spectrometry analysis of selenium compounds, comprising a base (11), characterized in that, A liquid extraction mechanism is fixedly installed on the top of the base (11), and the liquid extraction mechanism includes a small air compressor (12). The small air compressor (12) is fixedly installed on the top of the base (11). A first delivery pipe (13) is fixedly installed on the left output end of the small air compressor (12). A first one-way valve (14) is fixedly installed inside the end of the first delivery pipe (13) near the small air compressor (12). A second delivery pipe (15) is fixedly installed on the top of the first delivery pipe (13). A second one-way valve (16) is fixedly installed inside the end of the second delivery pipe (15) away from the first delivery pipe (13). 15) A third delivery pipe (17) is fixedly installed on the side wall. A third one-way valve (18) is fixedly installed inside the end of the third delivery pipe (17) near the second delivery pipe (15). A fourth delivery pipe (19) is fixedly installed on the top of the third one-way valve (18). A vacuum breaker valve (21) is fixedly installed on the side wall of the fourth delivery pipe (19). A fifth delivery pipe (22) is fixedly installed on the top of the fourth delivery pipe (19). A sixth delivery pipe (23) is fixedly installed at the end of the fifth delivery pipe (22) away from the fourth delivery pipe (19).

2. The liquid sample nebulization device for direct mass spectrometry analysis of selenium compounds as described in claim 1, characterized in that, A pneumatic nozzle is fixedly installed at one end of the first delivery pipe (13) near the threaded disc (25), and a fixed pipe (24) is fixedly installed on the side wall of the third delivery pipe (17). The end of the fixed pipe (24) away from the third conveying pipe (17) is fixedly installed with the second conveying pipe (15).

3. The liquid sample nebulization device for direct mass spectrometry analysis of selenium compounds as described in claim 1, characterized in that, A threaded disc (25) is fixedly installed at the end of the first delivery pipe (13) away from the small air compressor (12); The internal threads of the threaded disc (25) are fitted with a reaction chamber (26).

4. The liquid sample nebulization device for direct mass spectrometry analysis of selenium compounds as described in claim 3, characterized in that, The reaction chamber (26) has an air outlet (27) on its side wall; A threaded rod (28) is slidably installed inside the air outlet (27).

5. The liquid sample nebulization device for direct mass spectrometry analysis of selenium compounds as described in claim 4, characterized in that, A spring rod (29) is fixedly installed on the side wall of the threaded rod (28). A sealing disc (31) is fixedly installed at the end of the spring rod (29) away from the threaded rod (28).

6. The liquid sample nebulization device for direct mass spectrometry analysis of selenium compounds as described in claim 5, characterized in that, The threaded rod (28) has a threaded sleeve (32) threaded on its side wall. The threaded sleeve (32) has a sliding plate (33) rotatably mounted on its side wall, and the sliding plate (33) is slidably mounted inside the base (11).

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