Sample atomization device for soil detection

Abstract

The utility model discloses a sample atomization device for soil detection, which comprises a sample supply module and a mixed liquid supply module, the sample supply module and the mixed liquid supply module are connected with an atomization mechanism through a uniform mixing module, an aerosol output end of the atomization mechanism is connected with detection equipment through a cooling module, and a gas mixing module is arranged in the cooling module; the liquid outlet end of the mixed liquid supply module is connected with the liquid inlet end of the sample supply module through a suction pipeline, a liquid level sensing module is arranged in the sample supply module, and the signal output end of the liquid level sensing module is electrically connected to a suction pump of the suction pipeline through a control module. According to the utility model, the loss of the soil sample in the atomization process is reduced, so that the soil detection precision is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of soil detection, in particular to a sample atomization device for soil detection. Background Art

[0002] ICP-MS testing is a common test method in soil testing. The key step is to convert the sample into gaseous atoms. The sample is usually directly extracted from the sample tube by a peristaltic pump, and then sent to the atomizer for atomization to form an aerosol, which is then sent to the flame-like discharge high-temperature plasma after cooling. Since there will be some residue on the wall of the test tube and there will be adhesion loss during the atomization process, the final detection accuracy will be affected. Summary of the invention

[0003] Purpose of the invention: In order to overcome the deficiencies in the prior art, the utility model provides a sample atomization device for soil testing, which reduces the loss of soil samples during the atomization process, thereby improving the accuracy of soil testing.

[0004] Technical solution: To achieve the above-mentioned purpose, the utility model provides a sample atomization device for soil detection, comprising a sample supply module and a mixed liquid supply module, the two are connected to an atomization mechanism through a mixing module, the aerosol output end of the atomization mechanism is connected to a detection device through a cooling module, and the cooling module has a built-in gas mixing module; the liquid outlet end of the mixed liquid supply module is connected to the liquid inlet end of the sample supply module through a suction pipeline, the sample supply module is built-in with a liquid level sensing module, and the signal output end of the liquid level sensing module is electrically connected to the suction pump of the suction pipeline through a control module.

[0005] Furthermore, the sample supply module is provided with a sample container, and the mixed liquid supply module is provided with a mixed liquid container. The liquid outlet end of the sample container and the liquid outlet end of the mixed liquid container are respectively connected to the liquid inlet end of the peristaltic pump through a regulating valve, and the liquid outlet end of the peristaltic pump is connected to the liquid inlet end of the mixing module.

[0006] Furthermore, the sample container is placed vertically, a spray mechanism is arranged at the top of the sample container, the liquid outlet of the suction pipeline is connected to the liquid inlet of the spray mechanism, and the spray port of the spray mechanism is arranged toward the inner wall surface of the sample container.

[0007] Furthermore, the air inlet end of the atomization mechanism is connected to the output end of the air supply module through a carrier gas supply pipeline, the air outlet end of the atomization mechanism is connected to the mixing chamber of the cooling module, the mixing chamber is extended along the air outlet direction of the atomization mechanism, and the ejection end of the mixing chamber is aligned with the air outlet end of the atomization mechanism.

[0008] Furthermore, the output end of the air supply module is connected to the air inlet of the air distribution cavity through a mixed gas supply pipeline, and the ejection port of the air distribution cavity is connected to the mixing cavity.

[0009] Furthermore, the air distribution cavity is arranged around the outer side of the mixing cavity, and the air distribution cavity is provided with a plurality of ejection outlets, and the plurality of ejection outlets are evenly arranged around the cavity wall of the mixing cavity.

[0010] Beneficial effects: The utility model provides a sample atomization device for soil testing. When the sample residue is reduced to a certain value, the test mixed liquid is activated to flush the sample container wall, thereby carrying a small amount of sample solution remaining on the container wall into the atomizer; the mixed gas forms a gas barrier on the mixing cavity wall in the cooling module, reducing the direct contact between the aerosol and the mixing cavity wall, and ensuring the full mixing of the aerosol and the mixed gas, thereby reducing the loss of the sample due to adhesion to the cavity wall and improving the accuracy of soil testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Attached Figure 1 The utility model is a schematic structural diagram of an embodiment. DETAILED DESCRIPTION

[0012] The utility model is further described below in conjunction with the accompanying drawings.

[0013] As attached Figure 1 The sample atomization device for soil detection comprises a sample supply module and a mixed liquid supply module, both of which are connected to an atomization mechanism 5 via a mixing module 4, and an aerosol output end of the atomization mechanism 5 is connected to a detection device via a cooling module 6, and the cooling module 6 has a built-in gas mixing module. The detection device adopts a spectrometer.

[0014] This solution is applied to the detection of element intensity and content in soil samples. It is mainly used to form aerosols by atomizing the samples, and then send them into the center of the plasma torch by carrier gas for evaporation, decomposition, excitation and ionization. The high-temperature plasma ionizes most elements in the samples to form first-order positive ions by ionizing an electron, and then effectively transmits the ions in the plasma to the mass spectrometer through the interface sampling cone and interceptor cone of the ICP-MS, so as to analyze and calculate the intensity and content of a certain element. Among them, the mixed liquid supply module is used to supply diluent or internal standard solution, and mix it with the sample in a certain proportion according to the test requirements.

[0015] The liquid outlet of the mixed liquid supply module is connected to the liquid inlet of the sample supply module through a suction pipeline. The sample supply module has a built-in liquid level sensing module 11. The signal output end of the liquid level sensing module 11 is electrically connected to the suction pump 21 of the suction pipeline through a control module.

[0016] When the sample volume is reduced to a certain value, the test supply module is flushed by calling the mixed liquid. The amount of the mixed liquid is called according to the preset ratio of the sample residue, so that the sample volume required for the test is fully atomized, reducing the detection accuracy error caused by sample residue.

[0017] The sample supply module is provided with a sample container 1, and the mixed liquid supply module is provided with a mixed liquid container 2. The liquid outlet end of the sample container 1 and the liquid outlet end of the mixed liquid container 2 are respectively connected to the liquid inlet end of the peristaltic pump 3 through the regulating valve 8, and the liquid outlet end of the peristaltic pump 3 is connected to the liquid inlet end of the mixing module 4.

[0018] The peristaltic pump provides extraction power to extract the sample and the mixed solution at the same time, and two regulating pumps are used to adjust the extraction amount of the sample solvent and the mixed solution respectively, so as to ensure that the two can be mixed in a preset ratio, thereby ensuring the accuracy of the detection. Preferably, the mixing module 4 can use a spiral tube, which is conducive to the full mixing of the two solutions during the transportation process.

[0019] Preferably, the sample container 1 is placed vertically, a spray mechanism 9 is provided at the top of the sample container 1, the liquid outlet of the suction pipeline is connected to the liquid inlet of the spray mechanism 9, and the spray port of the spray mechanism 9 is arranged toward the inner wall surface of the sample container 1. This is beneficial for flushing the sample container wall, and the sample container can also be placed on a vibration device to maintain a uniform state of the soil sample solution.

[0020] The air inlet end of the atomizing mechanism 5 is connected to the output end of the air supply module 7 through the carrier gas supply pipeline 71, and the air outlet end of the atomizing mechanism 5 is connected to the mixing chamber 62 of the cooling module 6. The mixing chamber 62 is extended along the air outlet direction of the atomizing mechanism 5, and the ejection end 61 of the mixing chamber 62 is aligned with the air outlet end of the atomizing mechanism 5. It can ensure that the flow direction of the aerosol through the mixing chamber is parallel to the cavity wall, and avoid the direct ejection of the aerosol to the cavity wall in any direction. Among them, the cooling module adopts Peltier cooling equipment for cooling.

[0021] The output end of the gas supply module 7 is connected to the gas inlet of the gas distribution cavity 63 through the mixed gas supply pipeline 72, and the ejection port of the gas distribution cavity 63 is connected to the mixing cavity 62. The gas supply module supplies a certain amount of hydrogen to mix with the aerosol, which is conducive to the gaseous atoms of the aerosol being fully excited to form ions after entering the high-temperature plasma, thereby ensuring the detection accuracy.

[0022] The gas distribution cavity 63 is arranged around the outside of the mixing cavity 62, and the gas distribution cavity 63 is provided with a plurality of jet ports, which are uniformly arranged around the cavity wall of the mixing cavity 62. Thus, high pressure is formed near the cavity wall of the mixing cavity, and the jet ports can be diffused, so that the gas ejected from the plurality of jet ports is connected to form a gas barrier, which restricts the radial diffusion of the aerosol in the mixing cavity, avoids excessive contact with the cavity wall, and reduces the loss caused by adhesion to the cavity wall.

[0023] The above are only preferred embodiments of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A sample atomization device for soil testing, characterized in that: The invention comprises a sample supply module and a mixed liquid supply module, the two are connected to an atomizing mechanism (5) via a mixing module (4), the aerosol output end of the atomizing mechanism (5) is connected to a detection device via a cooling module (6), and the cooling module (6) has a built-in gas mixing module; the liquid outlet end of the mixed liquid supply module is connected to the liquid inlet end of the sample supply module via a suction pipeline, the sample supply module has a built-in liquid level sensing module (11), and the signal output end of the liquid level sensing module (11) is electrically connected to a suction pump (21) of the suction pipeline via a control module.

2. A sample atomization device for soil testing according to claim 1, characterized in that: The sample supply module is provided with a sample container (1), and the mixed liquid supply module is provided with a mixed liquid container (2). The liquid outlet end of the sample container (1) and the liquid outlet end of the mixed liquid container (2) are respectively connected to the liquid inlet end of a peristaltic pump (3) through a regulating valve (8), and the liquid outlet end of the peristaltic pump (3) is connected to the liquid inlet end of the mixing module (4).

3. A sample atomization device for soil testing according to claim 2, characterized in that: The sample container (1) is placed vertically, a spray mechanism (9) is arranged at the top of the sample container (1), the liquid outlet end of the suction pipeline is connected to the liquid inlet end of the spray mechanism (9), and the spray port of the spray mechanism (9) is arranged toward the inner wall surface of the sample container (1).

4. The sample atomization device for soil testing according to claim 3, characterized in that: The air inlet end of the atomizing mechanism (5) is connected to the output end of the air supply module (7) via a carrier gas supply pipeline (71); the air outlet end of the atomizing mechanism (5) is connected to the mixing chamber (62) of the cooling module (6); the mixing chamber (62) is extended along the air outlet direction of the atomizing mechanism (5); and the ejection end (61) of the mixing chamber (62) is aligned with the air outlet end of the atomizing mechanism (5).

5. The sample atomization device for soil testing according to claim 4, characterized in that: The output end of the air supply module (7) is connected to the air inlet of the air distribution chamber (63) via a mixed gas supply pipeline (72), and the ejection port of the air distribution chamber (63) is connected to the mixing chamber (62).

6. The sample atomization device for soil testing according to claim 5, characterized in that: The air distribution cavity (63) is arranged around the outside of the mixing cavity (62), and the air distribution cavity (63) is provided with a plurality of ejection ports, and the plurality of ejection ports are evenly arranged around the cavity wall of the mixing cavity (62).

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