Measuring device for inductively coupled plasma mass spectrometry

Abstract

The utility model discloses a measuring device for inductively coupled plasma mass spectrometry, which relates to the technical field of measuring devices and comprises an inductively coupled plasma mass spectrometer, a PLC (programmable logic controller) is mounted on the surface of the inductively coupled plasma mass spectrometer, and a dilution tank is mounted on the upper surface of the inductively coupled plasma mass spectrometer. A liquid inlet pipe is arranged on the side face of the dilution box, a first electromagnetic valve is installed on the surface of the liquid inlet pipe, a pressing plate is fixedly connected to the telescopic end of an electric telescopic rod, a rubber head is arranged on the upper surface of a three-way block, and a liquid outlet dropper is arranged on the lower surface of a second electromagnetic valve. Through the arrangement of the dissolving tank, the solution tank, the dilution tank, the diluent tank, the liquid inlet pipe, the first electromagnetic valve, the electric telescopic rod, the three-way block, the rubber head, the second electromagnetic valve and the liquid outlet dropper, the purpose of improving the practicability of the device is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of measuring devices, in particular to a measuring device used for inductively coupled plasma mass spectrometry. Background Art

[0002] Inductively coupled plasma mass spectrometer is an inorganic element and isotope analysis and testing technology developed in the 1980s. It combines the high-temperature ionization characteristics of inductively coupled plasma with the advantages of sensitive and fast scanning of mass spectrometer with unique interface technology to form a highly sensitive analysis technology. The plasma used by inductively coupled plasma mass spectrometer is basically the same as that used in emission spectroscopy, except for the orientation and coil grounding method. The mass analyzer, ion detector and data acquisition system used are similar to quadrupole GC-MS instruments. The mass analyzer mostly uses quadrupole mass spectrometers, and also uses high-resolution double-focusing sector magnetic field mass spectrometers, time-of-flight mass spectrometers, etc. The characteristics of this technology: high sensitivity, fast speed, can complete the quantitative determination of dozens of elements in a few minutes; simple spectral lines, less interference than spectral technology; linear range can reach 7 to 9 orders of magnitude; sample preparation and introduction are simple compared to other mass spectrometry technologies; can be used for elemental analysis, but also for rapid determination of isotope composition; the determination precision can reach 0.1%.

[0003] Publication of patent specification for utility model patent in China CN217332291U A measuring device for inductively coupled plasma mass spectrometry is disclosed in the specification. Although the utility model has a reasonable structural design and is convenient for switching between mobile and fixed devices, it is not only convenient for movement but also ensures stability during measurement. At the same time, it can replace manual periodic sampling of the inductively coupled plasma mass spectrometer, thereby improving the efficiency of sampling. However, the test sample needs to be pretreated before sampling. The sample liquid that has not been pretreated may still have impurities, particles or organic matter in the horizontal and vertical directions. Direct liquid injection may cause these contaminants to enter the instrument system, contaminate the instrument, and affect the performance and accuracy of the instrument. At present, when the sample liquid is pretreated, it is often processed in the laboratory. When the sample liquid is transferred, there is still a risk of contamination. The existing measuring device cannot directly inject the sample liquid, which is not convenient for pretreatment of the sample liquid and has the disadvantage of poor functionality. Utility Model Content

[0004] 1. Technical issues to be solved

[0005] In view of the deficiencies of the prior art, the utility model provides a measuring device for inductively coupled plasma mass spectrometry, which solves the problems raised in the above background technology.

[0006] (II) Technical solution

[0007] To achieve the above purpose, the utility model is implemented through the following technical solutions: a measuring device for inductively coupled plasma mass spectrometry, comprising an inductively coupled plasma mass spectrometer, a universal wheel is installed on the lower surface of the inductively coupled plasma mass spectrometer, a dilution box is installed on the upper surface of the inductively coupled plasma mass spectrometer, a PLC controller is installed on the surface of the inductively coupled plasma mass spectrometer, a dissolution box is installed on the upper surface of the inductively coupled plasma mass spectrometer, a solution box is installed on the upper surface of the dissolution box, a first metering pump is installed on the side of the solution box, a first water pipe is arranged at the output end of the first metering pump, and the other end of the first water pipe is arranged in the dissolution box, a second metering pump is installed on the upper surface of the dissolution box, a second water pipe is arranged at the output end of the second metering pump, and the other end of the second water pipe is arranged at the dilution box. In the box, a dilution liquid box is installed on the upper surface of the inductively coupled plasma mass spectrometer, a third metering pump is installed on the upper surface of the dilution liquid box, a third water pipe is arranged at the output end of the third metering pump, the other end of the third water pipe is arranged in the dilution box, a liquid inlet pipe is arranged on the side of the dilution box, a first solenoid valve is installed on the surface of the liquid inlet pipe, a mounting frame is fixedly connected to the upper surface of the inductively coupled plasma mass spectrometer, an electric telescopic rod is installed on the inner top surface of the mounting frame, a pressing plate is fixedly connected to the telescopic end of the electric telescopic rod, a fixing rod is fixedly connected to the inner side surface of the mounting frame, a three-way block is fixedly connected to the other end of the fixing rod, a rubber head is arranged on the upper surface of the three-way block, a second solenoid valve is installed on the lower surface of the three-way block, a liquid droplet head is arranged on the lower surface of the second solenoid valve, and an inlet is installed on the upper surface of the inductively coupled plasma mass spectrometer.

[0008] Optionally, the liquid inlet end of the first metering pump is arranged in the solution tank, the liquid inlet end of the second metering pump is arranged in the dissolution tank, and the liquid inlet end of the third metering pump is arranged in the diluent tank.

[0009] Optionally, the first metering pump, the second metering pump and the third metering pump are electrically connected to the PLC controller via wires respectively.

[0010] Optionally, a motor is installed on the upper surface of the dilution box, a rotating shaft is fixedly connected to the output end of the motor, a bearing is provided at the connection between the rotating shaft and the dilution box, and a stirring blade is fixedly connected to the surface of the rotating shaft.

[0011] Optionally, one end of the liquid inlet pipe away from the first solenoid valve is in communication with a three-way block, the three-way block is in communication with the second solenoid valve, and the rubber head is in communication with the three-way block.

[0012] Optionally, the pressing plate is located directly above the rubber head, and the first solenoid valve, the electric telescopic rod and the second solenoid valve are electrically connected to the PLC controller through wires respectively.

[0013] (III) Beneficial effects

[0014] The utility model provides a measuring device for inductively coupled plasma mass spectrometry, which has the following beneficial effects:

[0015] 1. The measuring device for inductively coupled plasma mass spectrometry has the effect of improving the practicality of the measuring device through the arrangement of a dissolution box, a solution box, a dilution box, a diluent box, a liquid inlet pipe, a first solenoid valve, an electric telescopic rod, a three-way block, a rubber head, a second solenoid valve and a liquid outlet head. When in use, a quantitative sample liquid is poured into the dissolution box, and a quantitative solution is pumped in according to the weight of the sample liquid poured into the dissolution box. The dissolving agent in the solution box can be an acid-soluble, alkali-soluble, oxidizing and other compatible solutions. The solution box is filled with a suitable dissolving agent. The water pipe is opened to pump the solvent in the solution box into the first water pipe, so that the sample liquid and the solvent are dissolved, and then the dissolved sample liquid is pumped into the second water pipe through the second metering pump, and the sample liquid enters the dilution box through the second water pipe. The amount of pumping is accurately controlled by the PLC controller, and then according to the amount of sample liquid entering the dilution box, a certain amount of diluent is pumped into the dilution box, and the diluent in the dilution box is pumped into the third water pipe through the third metering pump. The dilution enters the dilution box through the third water pipe, and finally the motor is turned on to drive the rotating shaft and the stirring blade to rotate, so as to stir the sample liquid in the dilution box. The sample liquid and the diluent are stirred and mixed. After completion, the telescopic end of the electric telescopic rod is controlled to extend outward, so that the pressure plate squeezes the rubber head to squeeze out the air in the rubber head. At this time, the valve plate of the second solenoid valve is controlled to close through the PLC controller, and then the first solenoid valve is opened. At the same time, the telescopic end of the electric telescopic rod is controlled to shrink inward, and reset according to the characteristics of the rubber head itself. During the resetting process, under the action of pressure, the finished sample liquid in the dilution box is sucked into the rubber head through the liquid inlet pipe, and then the first solenoid valve is controlled to close, the second solenoid valve is opened, and finally the telescopic end of the electric telescopic rod is controlled to extend outward. The finished sample liquid in the rubber head is squeezed out by the pressing plate, and the finished sample liquid drips downward through the liquid drop head and enters the sampling port, thereby completing the liquid feeding and cyclic control, and performing periodic sampling on the inductively coupled plasma mass spectrometer. The device controls each metering pump through a PLC controller, so that the inductively coupled plasma mass spectrometer has the function of pre-treating the sample liquid by itself. At the same time, under the coordinated action of the liquid inlet pipe, the first solenoid valve, the electric telescopic rod, the pressing plate, the three-way block, the second solenoid valve and the third water pipe, the function of periodic sampling is played, thereby achieving the purpose of improving the practicality of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0017] Figure 2 It is a structural schematic diagram of the rear section of the dissolving box of the utility model;

[0018] Figure 3 It is a structural schematic diagram of a partial cross-section of the dilution box of the utility model from the side;

[0019] Figure 4 It is a structural schematic diagram of a partial cross section of the rubber head of the utility model.

[0020] In the figure: 1. Inductively coupled plasma mass spectrometer; 2. Universal wheel; 3. PLC controller; 4. Dissolution box; 5. Solution box; 6. First metering pump; 7. First water pipe; 8. Second metering pump; 9. Second water pipe; 10. Dilution box; 11. Motor; 12. Rotating shaft; 13. Stirring blade; 14. Dilution liquid box; 15. Third metering pump; 16. Third water pipe; 17. Liquid inlet pipe; 18. First solenoid valve; 19. Mounting frame; 20. Electric telescopic rod; 21. Pressing plate; 22. Fixed rod; 23. Three-way block; 24. Rubber head; 25. Second solenoid valve; 26. Droplet outlet; 27. Inlet. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0022] Example 1

[0023] See also Figures 1 to 4The utility model provides a technical solution: a measuring device for inductively coupled plasma mass spectrometry, comprising an inductively coupled plasma mass spectrometer 1, a universal wheel 2 is installed on the lower surface of the inductively coupled plasma mass spectrometer 1, a PLC controller 3 is installed on the surface of the inductively coupled plasma mass spectrometer 1, a dilution box 10 is installed on the upper surface of the inductively coupled plasma mass spectrometer 1, a motor 11 is installed on the upper surface of the dilution box 10, a rotating shaft 12 is fixedly connected to the output end of the motor 11, a bearing is provided at the connection between the rotating shaft 12 and the dilution box 10, a stirring blade 13 is fixedly connected to the surface of the rotating shaft 12, and a dissolving The dissolution box 4 is provided with a solution box 5 on the upper surface thereof, a first metering pump 6 is provided on the side of the solution box 5, a first water pipe 7 is provided at the output end of the first metering pump 6, the other end of the first water pipe 7 is provided in the dissolution box 4, a second metering pump 8 is provided on the upper surface of the dissolution box 4, a second water pipe 9 is provided at the output end of the second metering pump 8, the other end of the second water pipe 9 is provided in the dilution box 10, a dilution liquid box 14 is provided on the upper surface of the inductively coupled plasma mass spectrometer 1, a third metering pump 15 is provided on the upper surface of the dilution liquid box 14, a liquid inlet end of the first metering pump 6 is provided in the solution box 5, a liquid inlet end of the second metering pump 8 is provided in the dissolution box 4, and the third metering pump 16 is provided in the dilution box 10. The liquid inlet end of the first metering pump 6, the second metering pump 8 and the third metering pump 15 are respectively electrically connected to the PLC controller 3 through wires. The output end of the third metering pump 15 is provided with a third water pipe 16, and the other end of the third water pipe 16 is provided in the dilution box 10. The side of the dilution box 10 is provided with a liquid inlet pipe 17, and the surface of the liquid inlet pipe 17 is installed with a first solenoid valve 18. The upper surface of the inductively coupled plasma mass spectrometer 1 is fixedly connected with a mounting frame 19, and the inner top surface of the mounting frame 19 is installed with an electric telescopic rod 20, and the telescopic end of the electric telescopic rod 20 is fixedly connected with a pressing plate 21, and the inner side surface of the mounting frame 19 is fixedly connected with a fixed Rod 22, the other end of the fixed rod 22 is fixedly connected with a three-way block 23, a rubber head 24 is arranged on the upper surface of the three-way block 23, a second solenoid valve 25 is installed on the lower surface of the three-way block 23, a liquid drop head 26 is arranged on the lower surface of the second solenoid valve 25, an end of the liquid inlet pipe 17 away from the first solenoid valve 18 is communicated with the three-way block 23, the three-way block 23 is communicated with the second solenoid valve 25, the rubber head 24 is communicated with the three-way block 23, the pressing plate 21 is located directly above the rubber head 24, the first solenoid valve 18, the electric telescopic rod 20 and the second solenoid valve 25 are respectively electrically connected to the PLC controller 3 through wires, and an injection port 27 is installed on the upper surface of the inductively coupled plasma mass spectrometer 1.

[0024] In order to achieve the purpose of improving the practicality of the device, when in use, a certain amount of sample liquid is poured into the dissolution box 4, and a certain amount of solution is pumped in according to the weight of the sample liquid poured in. The dissolving agent in the solution box 5 can be an acid-soluble, alkali-soluble, oxidizing, or other compatible solution. The solution box 5 is filled with a suitable dissolving agent, and the dissolving agent in the solution box 5 is pumped into the first water pipe 7 through the first water pipe 7 to dissolve the sample liquid and the dissolving agent, and then the dissolved sample liquid is pumped into the second water pipe 9 through the second metering pump 8. The sample liquid enters the dilution box 10 through the second water pipe 9, and the amount pumped in is measured by PL The C controller 3 is precisely controlled, and then according to the amount of sample liquid entering the dilution box 10, a fixed amount of diluent is pumped into the dilution box 10, and the diluent in the dilution box 14 is pumped into the third water pipe 16 through the third metering pump 15, and the diluent enters the dilution box 10 through the third water pipe 16, and finally the motor 11 is turned on, and the motor 11 drives the rotating shaft 12 and the stirring blade 13 to rotate, so as to stir and mix the sample liquid and the diluent in the dilution box 10. After completion, the telescopic end of the electric telescopic rod 20 is controlled to extend outward, so that the pressing plate 21 squeezes the rubber head 24, and the air pressure in the rubber head 24 is compressed. At this time, the valve plate of the second solenoid valve 25 is controlled to be closed by the PLC controller 3, and then the first solenoid valve 18 is opened, and at the same time, the telescopic end of the electric telescopic rod 20 is controlled to retract inwards, and the rubber head 24 is reset under the characteristics of the rubber head 24. During the resetting process, under the action of pressure, the finished product sample liquid in the dilution box 10 is sucked into the rubber head 24 through the liquid inlet pipe 17, and then the first solenoid valve 18 is controlled to be closed, and the second solenoid valve 25 is opened. Finally, the telescopic end of the electric telescopic rod 20 is controlled to extend outwards, and the rubber head 24 is squeezed by the pressing plate 21 to squeeze the finished product sample liquid in the rubber head 24. The sample liquid drips downward through the liquid dropper 26 and enters the sampling port 27, thereby completing the liquid feeding and cyclic control, and periodically injecting the inductively coupled plasma mass spectrometer 1. The device controls each metering pump through the PLC controller 3, so that the inductively coupled plasma mass spectrometer 1 has the function of pre-treating the sample liquid. At the same time, under the coordinated action of the liquid inlet pipe 17, the first solenoid valve 18, the electric telescopic rod 20, the pressing plate 21, the three-way block 23, the second solenoid valve 25 and the third water pipe 16, the periodic injection is played, thereby achieving the purpose of improving the practicality of the device.

[0025] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A measuring device for inductively coupled plasma mass spectrometry, comprising an inductively coupled plasma mass spectrometer (1), characterized in that: The lower surface of the inductively coupled plasma mass spectrometer (1) is equipped with a universal wheel (2); the surface of the inductively coupled plasma mass spectrometer (1) is equipped with a PLC controller (3); the upper surface of the inductively coupled plasma mass spectrometer (1) is equipped with a dilution box (10); the upper surface of the inductively coupled plasma mass spectrometer (1) is equipped with a dissolution box (4); the upper surface of the dissolution box (4) is equipped with a solution box (5); the side of the solution box (5) is equipped with a first metering pump (6); the output end of the first metering pump (6) is equipped with a first water pipe (7); the other end of the first water pipe (7) is arranged in the dissolution box (4); the upper surface of the dissolution box (4) is equipped with a second metering pump (8); the output end of the second metering pump (8) is equipped with a second water pipe (9); the other end of the second water pipe (9) is arranged in the dilution box (10); the upper surface of the inductively coupled plasma mass spectrometer (1) is equipped with a dilution liquid box (14); the upper surface of the dilution liquid box (14) is equipped with a third metering pump (11); 5), a third water pipe (16) is arranged at the output end of the third metering pump (15), the other end of the third water pipe (16) is arranged in the dilution box (10), a liquid inlet pipe (17) is arranged on the side of the dilution box (10), a first solenoid valve (18) is installed on the surface of the liquid inlet pipe (17), a mounting frame (19) is fixedly connected to the upper surface of the inductively coupled plasma mass spectrometer (1), an electric telescopic rod (20) is installed on the inner top surface of the mounting frame (19), and the electric telescopic rod (20) is The telescopic end is fixedly connected to a pressing plate (21); the inner side surface of the mounting frame (19) is fixedly connected to a fixing rod (22); the other end of the fixing rod (22) is fixedly connected to a three-way block (23); a rubber head (24) is provided on the upper surface of the three-way block (23); a second electromagnetic valve (25) is installed on the lower surface of the three-way block (23); a liquid droplet outlet head (26) is provided on the lower surface of the second electromagnetic valve (25); and a sample inlet (27) is installed on the upper surface of the inductively coupled plasma mass spectrometer (1).

2. The measuring device for inductively coupled plasma mass spectrometry according to claim 1, characterized in that: The liquid inlet end of the first metering pump (6) is arranged in the solution tank (5), the liquid inlet end of the second metering pump (8) is arranged in the dissolution tank (4), and the liquid inlet end of the third metering pump (15) is arranged in the diluent tank (14).

3. The measuring device for inductively coupled plasma mass spectrometry according to claim 1, characterized in that: The first metering pump (6), the second metering pump (8) and the third metering pump (15) are electrically connected to the PLC controller (3) via wires respectively.

4. The measuring device for inductively coupled plasma mass spectrometry according to claim 1, characterized in that: A motor (11) is mounted on the upper surface of the dilution box (10); a rotating shaft (12) is fixedly connected to the output end of the motor (11); a bearing is provided at the connection between the rotating shaft (12) and the dilution box (10); and a stirring blade (13) is fixedly connected to the surface of the rotating shaft (12).

5. The measuring device for inductively coupled plasma mass spectrometry according to claim 1, characterized in that: One end of the liquid inlet pipe (17) away from the first electromagnetic valve (18) is in communication with a three-way block (23), the three-way block (23) is in communication with the second electromagnetic valve (25), and the rubber head (24) is in communication with the three-way block (23).

6. The measuring device for inductively coupled plasma mass spectrometry according to claim 1, characterized in that: The pressing plate (21) is located directly above the rubber head (24), and the first solenoid valve (18), the electric telescopic rod (20) and the second solenoid valve (25) are electrically connected to the PLC controller (3) via wires.

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