Sample evaporator

Abstract

The utility model relates to instrument equipment technical field especially relates to a kind of sample evaporator, including sample evaporation component, air intake transmission component and gas phase transmission component.Sample evaporation component has evaporation cavity, heating element, first temperature sensor and first temperature controller are set in evaporation cavity, heating element is set in evaporation cavity, first temperature sensor is used to detect the temperature in sample evaporation cavity, first temperature sensor is connected with first temperature controller signal, first temperature controller is electrically connected with heating element, to heat and gasify the sample in evaporation cavity;Air intake transmission component includes air intake heating element and air inlet pipe, air inlet pipe is used to import argon into evaporation cavity, air intake heating element is wound in the outer periphery of air inlet pipe;Gas phase transmission component includes gas phase heat tracing element and gas phase transmission pipe, gas phase transmission pipe is used to transmit the gas phase mixture in evaporation cavity to analysis detection equipment, gas phase heat tracing element is wound in the outer periphery of gas phase transmission pipe.

Description

Technical Field

[0001] This utility model relates to the field of instrument and equipment technology, and in particular to a sample evaporator. Background Technology

[0002] Existing electrothermal evaporators are mainly designed for soil and food systems, focusing on temperature control in high-temperature zones. The maximum heating temperature of the evaporation chamber can reach 3000℃, giving them an advantage in rapid and rough on-site detection of heavy metals. However, for the evaporation and transport of heat-sensitive materials and low-boiling-point volatile materials, existing electrothermal evaporators cannot effectively separate components with similar properties, thus affecting the sensitivity and accuracy of analytical detection.

[0003] Therefore, there is an urgent need for a sample evaporator to solve the above-mentioned technical problems. Utility Model Content

[0004] The purpose of this invention is to provide a sample evaporator that can achieve sublimation and transport of heat-sensitive materials and low-boiling-point volatile materials, improve their ionization efficiency, and ensure the sensitivity and accuracy of analysis and detection.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A sample evaporator is provided, comprising:

[0007] A sample evaporation assembly has an evaporation chamber and a first inlet and an outlet communicating with the evaporation chamber. A heating element, a first temperature sensor, and a first temperature controller are disposed inside the evaporation chamber. The heating element is disposed inside the evaporation chamber. The first temperature sensor is used to detect the temperature inside the sample evaporation chamber. The first temperature sensor is signal-connected to the first temperature controller. The first temperature controller is electrically connected to the heating element. The heating element is used to maintain the temperature inside the evaporation chamber at 80℃-600℃ with a heating rate of 10℃ / min, so as to heat and vaporize the sample inside the evaporation chamber.

[0008] An intake transmission assembly includes an intake heating element and an intake pipe. The intake pipe is connected to the first inlet and is used to introduce argon gas into the evaporation chamber. The intake heating element is wrapped around the outer periphery of the intake pipe to keep the temperature inside the intake pipe between 80°C and 300°C.

[0009] A gas phase transfer assembly includes a gas phase heat tracing element and a gas phase transfer tube. The gas phase transfer tube is connected to the outlet and is used to transfer the gas phase mixture in the evaporation chamber to the analytical detection equipment. The gas phase heat tracing element is wrapped around the outer periphery of the gas phase transfer tube to keep the temperature inside the gas phase transfer tube between 80°C and 300°C.

[0010] Optionally, the sample evaporator further includes a gas path valve seat, which has a dilution gas channel, an oxygen channel, and a gas phase channel. The dilution gas channel and the oxygen channel are both connected to the outlet. The outlet is connected to the gas phase transmission pipe through the gas phase channel. The dilution gas channel is used to add argon gas into the gas phase mixture.

[0011] Optionally, the gas valve seat also has a protective gas passage, which is connected to the second inlet of the evaporation chamber and is used to introduce argon gas into the evaporation chamber.

[0012] Optionally, the intake transmission assembly further includes a second temperature sensor and a second temperature controller. The second temperature sensor is used to detect the temperature inside the intake pipe. The second temperature sensor is signal-connected to the second temperature controller, and the second temperature controller is electrically connected to the intake heating element.

[0013] Optionally, the gas phase transfer assembly further includes a third temperature sensor and a third temperature controller. The third temperature sensor is used to detect the temperature inside the gas phase transfer tube. The third temperature sensor is signal-connected to the third temperature controller, and the third temperature controller is electrically connected to the gas phase heat tracing element.

[0014] Optionally, the air intake transmission assembly further includes a flow rate controller, which is connected to the air intake pipe. The flow rate controller is used to keep the gas flow rate in the air intake pipe within a preset flow rate range. The flow rate controller is signal-connected to the second temperature controller of the air intake transmission assembly.

[0015] Optionally, the sample evaporation assembly includes a heating top cover, a heating stage body, and a sample boat. The heating top cover is sealed and fastened to the top of the heating stage body to form an evaporation chamber. The sample boat is disposed in the evaporation chamber and located above the heating element, and the sample is placed in the sample boat.

[0016] Optionally, the sample evaporation assembly further includes a guide rail, on which the heating stage body is slidably disposed. The heating stage body is movable on the guide rail to move the sample boat out of the coverage area of ​​the heating cover. The heating stage body and the heating cover are fixed together by a buckle rotatably disposed on the heating cover.

[0017] Optionally, the heating platform body has a pull rod, and pulling the pull rod can drive the heating platform body to move.

[0018] Optionally, the heating platform body has a liquid cooling channel, the coolant inlet and coolant outlet of the liquid cooling channel are located on the same side of the heating platform body, and the liquid cooling channel has at least one U-shaped flow channel and / or S-shaped flow channel.

[0019] The beneficial effects of this utility model include at least the following:

[0020] This invention provides a sample evaporator, comprising a sample evaporation component, an inlet transport component, and a gas phase transport component. The sample evaporation component has an evaporation chamber and a first inlet and outlet communicating with the evaporation chamber. A heating element is installed inside the evaporation chamber to maintain the temperature within the chamber at 80℃-600℃, thereby heating and vaporizing the sample within the evaporation chamber. A first temperature sensor and a first temperature controller are also installed inside the evaporation chamber. The first temperature sensor detects the temperature within the sample evaporation chamber and is signal-connected to the first temperature controller, which is electrically connected to the heating element. The cooperation of the heating element, the first temperature sensor, and the first temperature controller enables the maximum heating temperature within the evaporation chamber to reach 600℃, and allows for precise temperature control within the range of 80℃-300℃, achieving a heating temperature control accuracy of ±0.5℃. The minimum heating rate within the evaporation chamber is 10℃ / min. This relatively low heating rate allows for the effective separation of components with similar properties, thereby achieving effective separation of heat-sensitive materials and low-boiling-point volatile materials.

[0021] The gas inlet transfer assembly includes an inlet heating element and an inlet pipe. The inlet pipe is connected to the first inlet of the evaporation chamber and is used to introduce argon gas into the evaporation chamber through the first inlet. The inlet heating element is wrapped around the outer circumference of the inlet pipe to heat the inlet pipe, maintaining the temperature inside the inlet pipe at 80℃-300℃. The gas phase transfer assembly includes a gas phase heating element and a gas phase transfer pipe. The gas phase transfer pipe is connected to the outlet of the evaporation chamber and is used to transfer the vaporized sample in the evaporation chamber to the analytical detection equipment via the carrier gas (argon). The gas phase heating element is wrapped around the outer circumference of the gas phase transfer pipe to heat the gas phase transfer pipe, maintaining the temperature inside the gas phase transfer pipe at 80℃-300℃. By heating the inlet pipe, the temperature of the carrier gas entering the evaporation chamber is made close to that inside the evaporation chamber, preventing supercooled gas from instantaneously entering the evaporation chamber and affecting the sublimation efficiency of the sample. The heated carrier gas carries the vaporized sample into the gas phase transfer tube, which is heated by a gas phase heating element to maintain a temperature of 80℃-300℃. This prevents the sublimation and precipitation of gaseous components, ensuring a stable sample injection rate for the analytical equipment and avoiding sensitivity signal attenuation. On the other hand, it effectively suppresses sample deposition, eliminates cross-contamination between different samples, and prevents deposits from altering the cross-sectional area of ​​the tube, affecting signal stability, and causing flow field deterioration (such as eddies and dead volume), thereby exacerbating deposition and matrix effects. Through these dual effects, the additional losses during sample transfer are significantly reduced, and the transfer efficiency of gaseous samples is improved. Attached Figure Description

[0022] Figure 1 This is a partial structural schematic diagram of the sample evaporation assembly provided in an embodiment of the present invention;

[0023] Figure 2 This is a schematic diagram of the sample evaporation assembly provided in this embodiment of the present invention;

[0024] Figure 3 This is a schematic diagram of the structure of the air passage valve seat provided in this embodiment of the utility model;

[0025] Figure 4 This is a partial structural schematic diagram of the sample evaporator provided in an embodiment of the present invention.

[0026] Figure Labels

[0027] 1. Sample evaporation assembly; 101. First air inlet; 102. Second air inlet; 103. Air outlet; 11. Heating cover; 12. Heating platform body; 121. Coolant inlet; 122. Coolant outlet; 13. Buckle; 14. Guide rail; 15. Pull rod;

[0028] 2. Gas valve seat; 21. Dilution gas passage; 22. Oxygen passage; 23. Protective gas passage; 24. Gas phase passage. Detailed Implementation

[0029] To make the technical problem solved by this utility model, the technical solution adopted, and the technical effect achieved clearer, the technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely for explaining this utility model and not for limiting it. Furthermore, it should be noted that, for ease of description, only the parts related to this utility model are shown in the accompanying drawings, not all of them.

[0030] 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.

[0031] 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.

[0032] In the description of this embodiment, the terms "upper," "lower," "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.

[0033] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0034] like Figures 1 to 4 As shown, this embodiment provides a sample evaporator, including a sample evaporation component 1, an inlet transport component, and a gas phase transport component. The sample evaporation component 1 has an evaporation chamber and a first inlet and outlet communicating with the evaporation chamber. A heating element is installed inside the evaporation chamber to maintain the temperature within the evaporation chamber at 80℃-600℃, thereby heating and vaporizing the sample within the evaporation chamber. A first temperature sensor and a first temperature controller are also installed inside the evaporation chamber. The first temperature sensor is used to detect the temperature within the sample evaporation chamber, and the first temperature controller is signal-connected to the first temperature controller, which is electrically connected to the heating element. The cooperation of the heating element, the first temperature sensor, and the first temperature controller enables the maximum heating temperature within the evaporation chamber to reach 600℃, and allows for precise temperature control within the 80℃-300℃ temperature range, achieving a heating temperature control accuracy of ±0.5℃. The minimum heating rate within the evaporation chamber is 10℃ / min. This relatively low heating rate allows for the effective separation of components with similar properties, thereby achieving effective separation of heat-sensitive materials and low-boiling-point volatile materials.

[0035] In this embodiment, the first temperature sensor can be a PT100, thermocouple, etc., to detect the temperature in the evaporation chamber in real time and feed it back to the first temperature controller. The first temperature controller can be a PID controller, PLC, etc., to calculate and output a control signal to the heating element by comparing the set temperature with the actual temperature. The heating element performs heating, and the power of the heating element is adjusted by the second temperature controller, thereby achieving precise temperature control and heating.

[0036] The gas inlet transfer assembly includes an inlet heating element and an inlet pipe. The inlet pipe is connected to the first inlet of the evaporation chamber and is used to introduce argon gas into the evaporation chamber through the first inlet. The inlet heating element is wrapped around the outer circumference of the inlet pipe to heat the inlet pipe, maintaining the temperature inside the inlet pipe at 80℃-300℃. The gas phase transfer assembly includes a gas phase heating element and a gas phase transfer pipe. The gas phase transfer pipe is connected to the outlet of the evaporation chamber and is used to transfer the vaporized sample in the evaporation chamber to the analytical detection equipment via the carrier gas (argon). The gas phase heating element is wrapped around the outer circumference of the gas phase transfer pipe to heat the gas phase transfer pipe, maintaining the temperature inside the gas phase transfer pipe at 80℃-300℃. By heating the inlet pipe, the temperature of the carrier gas entering the evaporation chamber is made close to that inside the evaporation chamber, preventing supercooled gas from instantaneously entering the evaporation chamber and affecting the sublimation efficiency of the sample. The heated carrier gas carries the vaporized sample into the gas phase transfer tube, which is heated by a gas phase heating element to maintain a temperature of 80℃-300℃. This prevents the sublimation and precipitation of gaseous components, ensuring a stable sample injection rate for the analytical equipment and avoiding sensitivity signal attenuation. On the other hand, it effectively suppresses sample deposition, eliminates cross-contamination between different samples, and prevents deposits from altering the cross-sectional area of ​​the tube, affecting signal stability, and causing flow field deterioration (such as eddies and dead volume), thereby exacerbating deposition and matrix effects. Through these dual effects, the additional losses during sample transfer are significantly reduced, and the transfer efficiency of gaseous samples is improved.

[0037] Optionally, the sample evaporator also includes a gas path valve seat 2, which has a dilution gas channel 21, an oxygen channel 22, a protective gas channel 23, and a gas phase channel 24. Both the dilution gas channel 21 and the oxygen channel 22 are connected to the outlet, and the outlet is connected to the gas phase transmission pipe via the gas phase channel 24. In specific implementations, for example, when evaporating a low-boiling-point, volatile rare earth ytterbium complex, the temperature of the heating element can be set to 200°C to completely sublimate the sample into a gas. Argon is selected as the carrier gas. After sublimation, the sample exits the evaporation chamber outlet along with the carrier gas. Oxygen and dilution gas mix with the gaseous sample via the gas path valve seat 2 and then enter the analytical detection equipment. Oxygen acts as a combustion aid at the plasma flame, fully burning the organic components in the ytterbium complex, eliminating the sensitizing effect of organic matter on the ICP-MS / MS signal, and preventing the analytical detection equipment from shutting down. Preferably, the dilution gas channel 21 and the gas phase channel 24 are set at an angle. The oxygen channel 22 and the gas phase channel 24 are also set at an angle.

[0038] Optionally, the gas valve seat 2 also has a protective gas channel 23, which is connected to the second inlet of the evaporation chamber. The protective gas channel 23 is used to introduce argon gas into the evaporation chamber. The protective gas is introduced into the evaporation chamber to maintain a positive pressure environment inside the evaporation chamber. By maintaining the pressure difference between the inside and outside, external contaminants are prevented from entering the connection gap between the gas inlet pipe, the gas phase transmission pipe and the sample evaporation assembly 1, thus ensuring the accuracy of the sample composition.

[0039] In practice, to prevent corrosion of the pipelines by gases in high-temperature and oxygen atmospheres, both the inlet pipe and the gas phase transmission pipe are made of corrosion-resistant materials. These include metallic materials such as stainless steel, duplex steel, titanium alloys, and nickel-based alloys, and non-metallic materials such as polytetrafluoroethylene, perfluoroalkoxy resins, glass, or quartz, selected based on the gas composition (e.g., acidity, oxidizing properties). The inner wall of the pipe undergoes electrochemical polishing, passivation, and coating treatments to inhibit pipe corrosion.

[0040] In practice, heating tape can be selected for the intake heating element and the gas phase heat tracing element, so that the heating tape can be wrapped around the outer wall of the intake pipe and the gas phase transmission pipe. In addition, the outer layer of the heating tape can also be wrapped with heat insulation cotton to keep the intake pipe and the gas phase transmission pipe warm.

[0041] Optionally, the intake transmission assembly further includes a second temperature sensor and a second temperature controller. The second temperature sensor is used to detect the temperature inside the intake pipe. The second temperature sensor is signal-connected to the second temperature controller, and the second temperature controller is electrically connected to the intake heating element. The second temperature sensor detects the temperature inside the intake pipe and feeds the detection result back to the second temperature controller to control the heating power of the intake heating element, thereby achieving temperature regulation inside the intake pipe. This results in a temperature control accuracy of ±0.5℃ and a heating rate greater than 40℃ / min.

[0042] In this embodiment, the second temperature sensor can be a PT100, thermocouple, etc., to detect the temperature inside the intake pipe in real time and feed it back to the second temperature controller. The second temperature controller can be a PID controller, PLC, etc., to calculate and output a control signal to the intake heating element by comparing the set temperature with the actual temperature. The intake heating element performs heating, and the power of the intake heating element is adjusted by the second temperature controller, thereby achieving precise temperature control and heating.

[0043] Optionally, the gas phase transfer assembly further includes a third temperature sensor and a third temperature controller. The third temperature sensor is used to detect the temperature inside the gas phase transfer tube. The third temperature sensor is signal-connected to the third temperature controller, and the third temperature controller is electrically connected to the gas phase heat tracing element. The third sensor detects the temperature inside the gas phase transfer tube and feeds the detection result back to the third temperature controller to control the heating power of the gas phase heat tracing element, thereby achieving temperature regulation inside the gas phase transfer tube. This achieves a temperature control accuracy of ±1℃ and a heating rate greater than 40℃ / min.

[0044] In this embodiment, the third temperature sensor can be a PT100, thermocouple, or similar device to detect the temperature inside the gas phase transmission tube in real time and feed it back to the third temperature controller. The third temperature controller can be a PID controller, PLC, or similar device. By comparing the set temperature with the actual temperature, it calculates and outputs a control signal to the gas phase heat tracing element. The gas phase heat tracing element performs heating, and its power is adjusted by the third temperature controller, thereby achieving precise temperature control and heating.

[0045] Optionally, the intake transmission assembly also includes a flow rate controller, which is connected to the intake pipe and is used to maintain the gas flow rate within a preset range in the intake pipe. The flow rate controller includes a gas mass flow meter and a flow regulating valve. The flow rate controller is mounted on the intake pipe, and the gas mass flow meter regulates the flow regulating valve by measuring the gas flow rate within the intake pipe to maintain the gas flow rate within the intake pipe at 0-5 ml / min. Additionally, the flow rate controller is signal-connected to a second temperature controller of the intake transmission assembly to ensure that the temperature within the intake pipe is maintained between 80℃ and 300℃.

[0046] Furthermore, the sample evaporation assembly 1 also includes a heating cover 11, a heating stage body 12, and a sample boat. The heating cover 11 is sealed and fastened to the top of the heating stage body 12 to form an evaporation chamber. The sample boat is disposed within the evaporation chamber and located above the heating element, and the sample is placed inside the sample boat. To achieve precise temperature control for sample sublimation, the temperature at the measurement point within the evaporation chamber must be as close as possible to the temperature at the center point of the sample. Therefore, the sample boat must possess high thermal conductivity and high-temperature resistance, as well as corrosion resistance. Preferably, the sample boat can be made of one or more materials selected from tungsten, tantalum, and sapphire. The sample boat can be boat-shaped, rectangular, or circular. The heating element can be implemented using graphite electrodes, metal-ceramic wound heating wires, quartz tube wound heating wires, etc. The heating wires are mostly made of metal materials, such as tungsten-molybdenum alloys or nickel-chromium alloys.

[0047] Optionally, the sample evaporation assembly 1 also includes a guide rail 14, and the heating stage body 12 is slidably disposed on the guide rail 14. The heating stage body 12 can move on the guide rail 14 to move the sample boat out of the coverage area of ​​the heating cover 11. The heating stage body 12 and the heating cover 11 are fixed by a buckle 13 rotatably disposed on the heating cover 11. In specific implementation, when the heating cover 11 is fixed on the experimental frame and the heating stage body 12 is fastened to the heating cover 11 by the buckle 13, the heating stage body 12 is also in a fixed state. When it is necessary to put in the sample, the buckle 13 can be opened to separate the heating stage body 12 from the heating cover 11. At this time, the heating stage body 12 can be pulled to move it along the extension direction of the guide rail 14. The heating stage body 12 moves a preset distance to make the sample boat leave the coverage area of ​​the heating cover 11 so that the user can put the sample into the sample boat. Then the heating stage body 12 can be pushed back to its original position and fixed to the heating cover 11 by the buckle 13.

[0048] Optionally, the heating platform body 12 has a pull rod 15, which can be pulled by the user to move the heating platform body 12.

[0049] Optionally, the heating stage body 12 has a liquid cooling channel, through which external coolant flows into the liquid cooling channel via the coolant inlet 121 and exits from the coolant outlet 122, thereby cooling the heating stage body 12 after sample sublimation using the sample evaporator. The coolant inlet 121 and coolant outlet 122 of the liquid cooling channel are located on the same side of the heating stage body 12. The liquid cooling channel has at least one U-shaped flow channel and / or an S-shaped flow channel, and the flow channel arrangement of the liquid cooling channel can be adjusted according to the cooling requirements of the heating stage body 12.

[0050] The sample evaporator provided in this embodiment can be coupled with various analytical instruments, such as inductively coupled plasma optical emission spectrometry (ICP-OES), inductively coupled plasma mass spectrometry (ICP-MS), gas chromatography (GC), and gas chromatography-mass spectrometry (GC-MS), to achieve direct solid sample introduction and highly sensitive detection of trace impurities. Compared with the effect of traditional high-temperature electrothermal evaporators coupled with atomic spectrometers, this sample evaporator, based on the thermodynamic characteristics of the sample, selects to vaporize sample components in a low-temperature range, which can significantly improve the tolerance to environmental pollution and interference from non-target components.

[0051] The sample evaporator provided in this embodiment achieves low-temperature evaporation and gas-phase transport of thermosensitive materials and low-boiling-point, volatile materials through precise temperature control and efficient transmission pipeline design. This significantly improves the detection sensitivity and accuracy of analytical instruments. Its wide application compatibility and automation functions make it an important tool for trace analysis and materials research.

[0052] The above embodiments merely illustrate the basic principles and characteristics of this utility model. This utility model is not limited to the above embodiments. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A sample evaporator, characterized in that, include: The sample evaporation assembly (1) has an evaporation chamber and a first inlet and an outlet connected to the evaporation chamber. A heating element, a first temperature sensor and a first temperature controller are provided in the evaporation chamber. The heating element is disposed in the evaporation chamber. The first temperature sensor is used to detect the temperature in the sample evaporation chamber. The first temperature sensor is signal-connected to the first temperature controller. The first temperature controller is electrically connected to the heating element. The heating element is used to keep the temperature in the evaporation chamber between 80°C and 600°C and the heating rate is 10°C / min, so as to heat and vaporize the sample in the evaporation chamber. An intake transmission assembly includes an intake heating element and an intake pipe. The intake pipe is connected to the first inlet and is used to introduce argon gas into the evaporation chamber. The intake heating element is wrapped around the outer periphery of the intake pipe to keep the temperature inside the intake pipe between 80°C and 300°C. A gas phase transfer assembly includes a gas phase heat tracing element and a gas phase transfer tube. The gas phase transfer tube is connected to the outlet and is used to transfer the gas phase mixture in the evaporation chamber to the analytical detection equipment. The gas phase heat tracing element is wrapped around the outer periphery of the gas phase transfer tube to keep the temperature inside the gas phase transfer tube between 80°C and 300°C.

2. The sample evaporator according to claim 1, characterized in that, The sample evaporator also includes a gas path valve seat (2), which has a dilution gas channel (21), an oxygen channel (22) and a gas phase channel (24). The dilution gas channel (21) and the oxygen channel (22) are both connected to the outlet. The outlet is connected to the gas phase transmission pipe through the gas phase channel (24). The dilution gas channel (21) is used to add argon gas into the gas phase mixture.

3. The sample evaporator according to claim 2, characterized in that, The gas valve seat (2) also has a protective gas channel (23), which is connected to the second inlet of the evaporation chamber and is used to introduce argon gas into the evaporation chamber.

4. The sample evaporator according to claim 1, characterized in that, The intake transmission assembly further includes a second temperature sensor and a second temperature controller. The second temperature sensor is used to detect the temperature inside the intake pipe. The second temperature sensor is signal-connected to the second temperature controller, and the second temperature controller is electrically connected to the intake heating element.

5. The sample evaporator according to claim 1, characterized in that, The gas phase transport assembly further includes a third temperature sensor and a third temperature controller. The third temperature sensor is used to detect the temperature inside the gas phase transport tube. The third temperature sensor is signal-connected to the third temperature controller, and the third temperature controller is electrically connected to the gas phase heat tracing element.

6. The sample evaporator according to claim 1, characterized in that, The air intake transmission assembly further includes a flow rate controller, which is connected to the air intake pipe. The flow rate controller is used to keep the gas flow rate in the air intake pipe within a preset flow rate range. The flow rate controller is signal-connected to the second temperature controller of the air intake transmission assembly.

7. The sample evaporator according to claim 1, characterized in that, The sample evaporation assembly (1) includes a heating cover (11), a heating stage body (12), and a sample boat. The heating cover (11) is sealed and fastened to the top of the heating stage body (12) to form an evaporation chamber. The sample boat is disposed in the evaporation chamber and located above the heating element. The sample is placed in the sample boat.

8. The sample evaporator according to claim 7, characterized in that, The sample evaporation assembly (1) also includes a guide rail (14), the heating stage body (12) is slidably disposed on the guide rail (14), the heating stage body (12) is able to move on the guide rail (14) so ​​that the sample boat is moved out of the coverage area of ​​the heating cover (11), and the heating stage body (12) and the heating cover (11) are fixed by a buckle (13) rotatably disposed on the heating cover (11).

9. The sample evaporator according to claim 8, characterized in that, The heating platform body (12) has a pull rod (15), and pulling the pull rod (15) will drive the heating platform body (12) to move.

10. The sample evaporator according to claim 7, characterized in that, The heating platform body (12) has a liquid cooling channel, the coolant inlet (121) and coolant outlet (122) of the liquid cooling channel are located on the same side of the heating platform body (12), and the liquid cooling channel has at least one U-shaped flow channel and / or S-shaped flow channel.

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