Sample introduction interface device and mass spectrometer

Abstract

The present invention relates to a sample introduction interface device and a mass spectrometer. The sample introduction interface device includes: a female base, a cover body assembly and an adapter. The female base is provided with a first gas path and a second gas path. The female base is provided with a first side wall and a second side wall. Opposite ends of the first gas path are respectively disposed on the first side wall and the second side wall. The second gas path penetrates through the female base, and one end of the second gas path is used for capillary sample introduction. The cover body assembly includes a cover body, the cover body is covered on the first side wall and covers the first gas path. The first gas path is communicated with the fourth gas path through the third gas path, and one end of the fourth gas path far from the second gas path is used for sample outgassing. The above sample introduction interface device integrates membrane sample introduction and capillary sample introduction on the same device, and the structures of the two are independent of each other, with simple disassembly and assembly, convenient maintenance, small volume, and is beneficial to improving the overall portability of the mass spectrometer.

Description

Technical Field

[0001] The present invention relates to the technical field of mass spectrometers, and particularly to a sample introduction interface device and a mass spectrometer. Background Art

[0002] The basic structure of a mass spectrometer generally includes a sample introduction system, an ion source, a mass analyzer, a detector, a vacuum system, and related control circuits. The sample introduction system is inseparable from the vacuum system and also has an important impact on the miniaturization of the mass spectrometer. The sample introduction system needs to introduce a sample in an atmospheric pressure environment into the vacuum environment inside the mass spectrometer for analysis, and at the same time, it is necessary to maintain the vacuum degree inside the mass spectrometer. The sample introduction systems in mass spectrometers are roughly divided into direct injection, chromatographic injection, atmospheric pressure ionization source interfaces, etc. The direct injection method is more commonly used and belongs to continuous injection. Generally, it means that at room temperature and atmospheric pressure, gaseous or liquid samples can be introduced into the ion source in the form of a neutral flow through an adjustable nozzle device. Direct injection includes capillary / orifice direct injection and membrane injection, which are used for gases or volatile substances to enter the mass spectrometer by diffusion.

[0003] In traditional technologies, there are mainly two ways for the sample introduction structure of portable small mass spectrometers. One is to have only a single injection mode, choosing either a capillary injection structure or a membrane injection structure, and the two structures are not compatible; the second is to adopt both modes, but the capillary injection and the membrane injection are two independent modules that are divided into different branches and connected to the ion source ionization chamber, or a multi-way switching valve is used to converge the gas paths of these two independent modules to form a single branch and connect it to the ionization chamber. However, the above combination methods have complex control, high costs, low system integration, and high power consumption. Summary of the Invention

[0004] Based on this, it is necessary to provide a sample introduction interface device and a mass spectrometer that can effectively be compatible with two injection modes, have a small volume, and strong portability.

[0005] The technical solution is as follows: A sample introduction interface device, the sample introduction interface device includes: a female seat, the female seat is provided with a first gas path and a second gas path, the female seat is provided with a first side wall and a second side wall, opposite ends of the first gas path are respectively arranged on the first side wall and the second side wall, the second gas path penetrates the female seat, and one end of the second gas path is used for capillary injection; a cover body assembly, the cover body assembly includes a cover body, the cover body is covered on the first side wall and covers the first gas path, and the cover body is used for membrane injection; an adapter, the adapter is provided with a third gas path and a fourth gas path, the fourth gas path penetrates opposite ends of the adapter, and the adapter is covered on the second side wall, the fourth gas path is communicated with the second gas path, the first gas path is communicated with the fourth gas path through the third gas path, and one end of the fourth gas path away from the second gas path is used for sample outgassing.

[0006] In the above sample introduction interface device, during the installation process, the cover body is covered on the first side wall, so that the first gas path can perform membrane sampling through the cover body, and the adapter is connected to the second side wall, so that the first gas path is communicated with the third gas path, and the fourth gas path is communicated with the second gas path. Since the third gas path is communicated with the fourth gas path, membrane sampling and capillary sampling are merged and discharged through the fourth gas path. Membrane sampling and capillary sampling are integrated on the same device, and their structures are independent of each other, easy to disassemble and assemble, convenient for maintenance, small in size, and beneficial to improving the overall portability of the mass spectrometer.

[0007] In one embodiment, the base further defines a sample cell, opposite ends of the sample cell are provided with a first opening and a second opening, the area of the first opening is larger than that of the second opening, the first opening is formed on the first side wall, and one end of the first gas path close to the first side wall is communicated with the sample cell through the second opening.

[0008] In one embodiment, the cover assembly further includes a membrane and a support plate, the support plate is disposed in the sample cell, the membrane is disposed between the support plate and the cover body, and the support plate is used to support the membrane.

[0009] In one embodiment, the cover assembly further includes a first sealing module, the first sealing module is disposed between the cover body and the first side wall, and the cover body is in sealing cooperation with the first side wall through the first sealing module.

[0010] In one embodiment, the sample introduction structure device further includes a second sealing module, the second sealing module is disposed between the adapter and the second side wall, and the adapter is in sealing cooperation with the second side wall through the second sealing module.

[0011] In one embodiment, the cover assembly further includes a first connector and a second connector, the cover body further defines a fifth gas path and a sixth gas path, the first connector and the second connector are spaced apart on the cover body, the first connector is used for membrane sampling, the second connector is used for exhausting gas, the first connector is communicated with the sample cell through the fifth gas path, the second connector is communicated with the sample cell through the sixth gas path, the membrane is disposed between the fifth gas path, the sixth gas path and the sample cell, and the fifth gas path and the sixth gas path are located on the same side of the membrane.

[0012] In one embodiment, the female base is further provided with a heating element, a temperature measuring element and a hollowed-out portion. The hollowed-out portion is located between the first side wall and the first gas path. The heating element is located between the first gas path and the hollowed-out portion. The temperature measuring element is arranged adjacent to the first gas path, and the temperature measuring element is used to detect the temperature of the first gas path.

[0013] In one embodiment, the sample injection interface device further includes a heat preservation module, and the heat preservation module is located in the hollowed-out portion.

[0014] In one embodiment, the female base is further provided with a sample injection tube. The sample injection tube passes through the female base through the first gas path, and opposite ends of the sample injection tube extend out of opposite ends of the female base. One end of the sample injection tube is in plug-in fit with the inner wall of the fourth gas path, and the other end of the sample injection tube is used for capillary sample injection.

[0015] In one embodiment, the third gas path includes a first branch and a second branch. The first branch and the second branch are perpendicularly arranged and communicated. The first branch is communicated with the first gas path, and the second branch is perpendicular to and communicated with the fourth gas path.

[0016] A mass spectrometer, which includes the sample injection interface device described in any one of the above.

[0017] For the above mass spectrometer, during the installation process, the cover body is covered on the first side wall so that the first gas path can perform membrane sample injection through the cover body, and the adapter is connected to the second side wall so that the first gas path is communicated with the third gas path, and the fourth gas path is communicated with the second gas path. Since the third gas path is communicated with the fourth gas path, the membrane sample injection and the capillary sample injection are merged and discharged through the fourth gas path. The membrane sample injection and the capillary sample injection are integrated on the same device, and their structures are independent of each other, simple to disassemble and assemble, convenient to maintain, small in size, and beneficial to improving the overall portability of the mass spectrometer. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention.

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0020] Figure 1 It is a schematic diagram of the overall structure of the sample injection interface device described in one embodiment;

[0021] Figure 2 It is a schematic structural view of the cover body part described in an embodiment;

[0022] Figure 3 It is a schematic structural view of another perspective of the cover body part described in an embodiment;

[0023] Figure 4 It is a schematic view of another perspective of the sample injection interface device described in an embodiment;

[0024] Figure 5 It is a top view of the first side wall described in an embodiment;

[0025] Figure 6 It is a schematic structural view of the second side wall described in an embodiment.

[0026] Explanation of reference numerals:

[0027] 100, sample injection interface device; 110, female seat; 111, first gas path; 112, second gas path; 113, sample cell; 114, heating element; 115, temperature measuring element; 116, hollow part; 117, sample injection tube; 120, cover body assembly; 121, cover body; 122, diaphragm; 123, support plate; 124, first sealing module; 1241, first sealing ring; 1242, second sealing ring; 125, first joint; 1251, switch solenoid valve; 126, second joint; 1261, one-way valve; 127, fifth gas path; 128, sixth gas path; 129, serpentine module; 130, adapter; 131, third gas path; 1311, first branch; 1312, second branch; 132, fourth gas path; 133, second sealing module. Detailed implementation manners

[0028] In order to make the above objects, features, and advantages of the present invention more obvious and understandable, the following will describe in detail the specific implementation manners of the present invention with reference to the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0029] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0030] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0031] In the present invention, unless otherwise clearly specified and defined, the terms "mounted", "connected", "coupled", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] In the present invention, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0033] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there may be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation.

[0034] Please refer to Figure 1 and Figure 2 , Figure 1 shows a schematic diagram of the overall structure of the sampling interface device 100 described in an embodiment of the present invention; Figure 2 shows a schematic diagram of the structure of a part of the cover body 121 in an embodiment of the present invention. An embodiment of the present invention provides a sampling interface device 100, which includes a female seat 110, a cover body assembly 120 and a swivel joint 130. The female seat 110 is provided with a first gas path 111 and a second gas path 112. The female seat 110 is provided with a first side wall and a second side wall. Opposite ends of the first gas path 111 are respectively disposed on the first side wall and the second side wall. The second gas path 112 penetrates through the female seat 110, and one end of the second gas path 112 is used for capillary sampling; the cover body assembly 120 includes a cover body 121, and the cover body 121 is covered on the first side wall and covers the first gas path 111, and the cover body 121 is used for membrane sampling. The swivel joint 130 is provided with a third gas path 131 and a fourth gas path 132. The fourth gas path 132 penetrates through opposite ends of the swivel joint 130, and the swivel joint 130 is covered on the second side wall. The fourth gas path 132 is communicated with the second gas path 112. The first gas path 111 is communicated with the third gas path 131 and the fourth gas path 132, and one end of the fourth gas path 132 away from the second gas path 112 is used for sample outgassing.

[0035] For the above-mentioned sampling interface device 100, during the installation process, the cover body 121 is covered on the first side wall so that the first gas path 111 can perform membrane sampling through the cover body 121, and the swivel joint 130 is connected to the second side wall so that the first gas path 111 is communicated with the third gas path 131, and the fourth gas path 132 is communicated with the second gas path 112. Since the third gas path 131 is communicated with the fourth gas path 132, membrane sampling and capillary sampling are merged and outgassed through the fourth gas path 132. Membrane sampling and capillary sampling are integrated on the same device, and their structures are independent of each other, easy to disassemble and assemble, convenient for maintenance, small in size, and beneficial to improving the overall portability of the mass spectrometer.

[0036] Optionally, the shape of the first gas path 111 can be that two branches are perpendicular, or an arc-shaped gas path. Also, the first gas path 111 can be a groove or a stainless steel pipe. Specifically, in this embodiment, the first gas path 111 is a groove with a 90° right angle and a diameter of 0.5 - 0.8 mm. Thus, it is convenient to process the first gas path 111 on the female seat 110.

[0037] Specifically, please refer to Figure 1 , the female seat 110 is further provided with a sample cell 113. Opposite ends of the sample cell 113 are provided with a first opening and a second opening. The area of the first opening is larger than that of the second opening. The first opening is formed on the first side wall. One end of the first gas path 111 close to the first side wall communicates with the sample cell 113 through the second opening. Specifically, the sample cell 113 is a conical groove with a taper of 100° - 175°. Thus, the sample for membrane injection enters the sample cell 113 through the cover body 121, and then enters the third gas path 131 through the first gas path 111, which is beneficial to ensuring the normal progress of membrane injection.

[0038] Further, please refer to Figure 1 , the cover assembly 120 further includes a membrane 122 and a support plate 123. The support plate 123 is disposed in the sample cell 113, and the membrane 122 is disposed between the support plate 123 and the cover body 121. The support plate 123 is used to support the membrane 122. Thus, the support plate 123 is disposed in the sample cell 113, which can support the membrane 122 and thus ensure the working stability of the membrane 122.

[0039] Please refer to Figure 3 , Figure 3 shows another perspective structural schematic diagram of the cover body 121 part in an embodiment of the present invention; the cover assembly 120 further includes a serpentine module 129. The serpentine module 129 is disposed on a side surface of the cover body 121 close to the first side wall, and the outer contour area of the serpentine module 129 is smaller than the outer contour area of the support plate 123. Thus, the serpentine module 129 is beneficial to increasing the contact area between the gas sample and the membrane 122 and improving the membrane injection efficiency.

[0040] Please refer to Figure 1 and Figure 5 , Figure 5 shows a top view of the first side wall in an embodiment of the present invention; in one embodiment, the cover assembly 120 further includes a first sealing module 124. The first sealing module 124 is disposed between the cover body 121 and the first side wall, and the cover body 121 is in sealing cooperation with the first side wall through the first sealing module 124. Thus, it is beneficial to ensure the sealing performance between the cover body 121 and the first side wall, and thus ensure the membrane injection effect.

[0041] Optionally, the first sealing module 124 may be an elastic sealing ring, sealant, or other sealing structure.

[0042] Specifically, please refer to Figure 1 and Figure 5 , the first sealing module 124 includes a first sealing ring 1241 and a second sealing ring 1242. The first sealing ring 1241 and the second sealing ring 1242 are arranged at intervals and concentrically. The cover body 121 is in sealing cooperation with the first side wall through the first sealing ring 1241 and the second sealing ring 1242. In this way, sealing is carried out through two sealing rings, which is beneficial to further improving the sealing effect and thus further ensuring the film injection effect of the cover body 121. This embodiment only provides a specific implementation manner of the first sealing module 124, but is not limited thereto.

[0043] In one embodiment, please refer to Figure 5 , four mounting holes are provided at the four corners of the cover body 121, and four corresponding mounting holes are provided on the first side wall. The cover body 121 is tightly fitted with the first side wall of the base 110 through four screws. In this way, it is convenient for installation and maintenance, and is beneficial to further ensuring the sealing effect.

[0044] In one embodiment, please refer to Figure 1 and Figure 6 , the sample injection structure device further includes a second sealing module 133. The second sealing module 133 is arranged between the adapter 130 and the second side wall. The adapter 130 is in sealing cooperation with the second side wall through the second sealing module 133. In this way, it is beneficial to ensure the sealing between the adapter 130 and the second side wall, thereby avoiding the leakage of gas samples.

[0045] Optionally, the second sealing module 133 may be an elastic sealing ring, sealant, or other sealing structure.

[0046] Specifically, the second sealing module 133 includes a third sealing ring and a fourth sealing ring (not shown in the figure). The third sealing ring and the fourth sealing ring are arranged at intervals and concentrically. In this way, sealing is carried out through two sealing rings, which is beneficial to further improving the sealing effect and thus further ensuring the film injection and capillary injection effects of the adapter 130. This embodiment only provides a specific implementation manner of the second sealing module 133, but is not limited thereto.

[0047] In one embodiment, please refer to Figure 6 , four mounting holes are provided at the four corners of the adapter 130, and four corresponding mounting holes are provided on the second side wall. The adapter 130 is tightly fitted with the second side wall of the base 110 through four screws. In this way, it is convenient for installation and maintenance, and is beneficial to further ensuring the sealing effect between the adapter 130 and the base 110.

[0048] In one embodiment, please refer toFigure 1 With Figure 2 , the cover assembly 120 further includes a first connector 125 and a second connector 126. The cover body 121 is further provided with a fifth gas path 127 and a sixth gas path 128. The first connector 125 and the second connector 126 are spaced apart on the cover body 121. The first connector 125 is for membrane injection, and the second connector 126 is for exhaust. The first connector 125 is communicated with the sample cell 113 through the fifth gas path 127, and the second connector 126 is communicated with the sample cell 113 through the sixth gas path 128. The membrane 122 is disposed between the fifth gas path 127, the sixth gas path 128 and the sample cell 113, and the fifth gas path 127 and the sixth gas path 128 are located on the same side of the membrane 122. Thus, the first connector 125 is connected to the membrane injection module, the sample enters the membrane 122 through the fifth gas path 127, and is injected into the third gas path through the first gas path 111. The sixth gas path 128 can exhaust gas, thereby ensuring stable air pressure.

[0049] Specifically, the fifth gas path 127 and the sixth gas path 128 can be grooves with a 90° right angle and a diameter of 0.5 - 0.8 mm, or stainless steel tubes with an inner diameter of 0.75 mm that can be bent into a certain shape. Specifically, the fifth gas path 127 and the sixth gas path 128 are grooves. And the inner surfaces of both the fifth gas path 127 and the sixth gas path are polished and inerted. The contact points of the fifth gas path 127, the sixth gas path 128 and the membrane 122 are not on the same straight line, and are respectively located at two edge points of 35° and 215° above and below the membrane 122.

[0050] In one embodiment, please refer to Figure 2 , a switching solenoid valve 1251 is connected to the external gas path of the first connector 125, and a check valve 1261 is connected to the external gas path of the second connector 126, which is beneficial to prevent gas backflow.

[0051] Please refer to Figure 4 , Figure 4 shows another perspective schematic diagram of the injection interface device 100 described in an embodiment of the present invention; in one embodiment, the female seat 110 is further provided with a heating element 114, a temperature measuring element 115 and a hollowed-out portion 116. The hollowed-out portion 116 is located between the first side wall and the first gas path 111, the heating element 114 is located between the first gas path 111 and the hollowed-out portion 116, and the temperature measuring element 115 is disposed adjacent to the first gas path 111. The temperature measuring element 115 is used to detect the temperature of the first gas path 111. Specifically, the heating element 114 is a heating rod. Thus, the heating rod closely attached to the second gas path 112 can meet the temperature requirements of the gas chromatograph interface during capillary injection. The heating rod and the membrane 122 are hollowed out and do not directly contact. Heat conduction is performed through peripheral components, which can meet the temperature requirements of the gas chromatograph interface during membrane injection.

[0052] Furthermore, the sample introduction interface device 100 further includes a heat preservation module (not shown in the figure), and the heat preservation module is located in the hollow portion 116. Specifically, the hollow portion 116 is a waist-shaped hollow, and the hollow portion 116 is located 1 mm above the upper end of the heating rod. The heat preservation module includes aluminum foil and heat preservation cotton, and the aluminum foil is wrapped outside the heat preservation cotton. In this way, it is beneficial to prevent heat dissipation and reduce the power consumption of the system.

[0053] In one embodiment, please refer to Figure 1 , the female seat 110 is further provided with a sample introduction tube 117. The sample introduction tube 117 penetrates through the female seat 110 through the first gas path 111, and the opposite ends of the sample introduction tube 117 extend out of the opposite ends of the female seat 110. One end of the sample introduction tube 117 is inserted and matched with the inner wall of the fourth gas path 132, and the other end of the sample introduction tube 117 is used for capillary sampling. Specifically, the sample introduction tube 117 is a metal stainless steel tube. The length of the metal stainless steel tube extending out of the female seat 110 in the direction close to the ion source is 3-4 mm, and the length extending out of the female seat 110 in the direction close to the external air is 20-30 mm. In this way, the part extending out of the female seat 110 is suitable for directly introducing the sample into the ion source ionization chamber, reducing sample loss and improving detection sensitivity. Extending 20-30 mm out of the female seat 110 in the direction close to the external air is beneficial for joint transfer and realizing the connection of different types of tubes.

[0054] Please refer to Figure 1 and Figure 6 , Figure 6 shows a schematic structural diagram of the second side wall in an embodiment of the present invention. In one embodiment, the third gas path 131 includes a first branch 1311 and a second branch 1312. The first branch 1311 and the second branch 1312 are vertically arranged and communicated. The first branch 1311 is communicated with the first gas path 111, and the second branch 1312 is perpendicular to and communicated with the fourth gas path 132. Specifically, the bottom end of the second branch 1312 exceeds the center of the fourth branch by 0.45 mm. In this way, it is convenient for the processing of the adapter 130. The capillary sampling and the membrane sampling module are aggregated through the vacuum adapter 130 and introduced into the ion source ionization chamber through the fourth gas path 132. The dead volume in the gas path is small and has little influence on the sample peak width.

[0055] In one embodiment, a mass spectrometer (not shown in the figure), the mass spectrometer includes the sample introduction interface device 100 in any one of the above.

[0056] In the installation process of the above-mentioned mass spectrometer, the cover body 121 is covered on the first side wall so that the first gas path 111 can perform membrane inlet through the cover body 121, and the adapter 130 is connected to the second side wall so that the first gas path 111 communicates with the third gas path 131, and the fourth gas path 132 communicates with the second gas path 112. Since the third gas path 131 communicates with the fourth gas path 132, membrane inlet and capillary inlet are merged and discharged through the fourth gas path 132. Membrane inlet and capillary inlet are integrated on the same device, and their structures are independent of each other, easy to disassemble and assemble, convenient for maintenance, small in size, and beneficial to improving the overall portability of the mass spectrometer.

[0057] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0058] The above embodiments only represent several implementation manners of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the appended claims.

Claims

1. An injection interface device, characterized in that, The injection interface device includes: A female seat, the female seat is provided with a first gas path and a second gas path, the female seat has a first side wall and a second side wall, opposite ends of the first gas path are respectively arranged on the first side wall and the second side wall, the second gas path penetrates through the female seat, and one end of the second gas path is used for capillary injection. A cover body assembly, the cover body assembly includes a cover body, the cover body covers the first side wall and covers the first gas path, and the cover body is used for membrane injection. An adapter, the adapter is provided with a third gas path and a fourth gas path, the fourth gas path penetrates through opposite ends of the adapter, and the adapter covers the second side wall, the fourth gas path is communicated with the second gas path, the first gas path is communicated with the fourth gas path through the third gas path, and one end of the fourth gas path away from the second gas path is used for sample outlet.

2. The sample introduction interface device according to claim 1, wherein, The female seat is further provided with a sample pool, opposite ends of the sample pool are provided with a first opening and a second opening, the area of the first opening is larger than that of the second opening, the first opening is arranged on the first side wall, and one end of the first gas path close to the first side wall is communicated with the sample pool through the second opening.

3. The sample injection interface device according to claim 2, characterized in that, The cover body assembly further includes a membrane and a support plate, the support plate is arranged in the sample pool, and the membrane is arranged between the support plate and the cover body, and the support plate is used for supporting the membrane.

4. The sample injection interface device according to claim 1, characterized in that, The cover body assembly further includes a first sealing module, the first sealing module is arranged between the cover body and the first side wall, and the cover body is in sealing cooperation with the first side wall through the first sealing module; and / or, The injection interface device further includes a second sealing module, the second sealing module is arranged between the adapter and the second side wall, and the adapter is in sealing cooperation with the second side wall through the second sealing module.

5. The sample introduction interface device according to claim 3, characterized in that, The cover body assembly further includes a first connector and a second connector, the cover body is further provided with a fifth gas path and a sixth gas path, the first connector and the second connector are arranged on the cover body at intervals, the first connector is used for membrane injection, the second connector is used for exhaust, the first connector is communicated with the sample pool through the fifth gas path, the second connector is communicated with the sample pool through the sixth gas path, the membrane is arranged between the fifth gas path, the sixth gas path and the sample pool, and the fifth gas path and the sixth gas path are on the same side of the membrane.

6. The sampling interface device according to claim 1, wherein The female seat is further provided with a heating element, a temperature measuring element and a hollow part, the hollow part is located between the first side wall and the first gas path, the heating element is located between the first gas path and the hollow part, the temperature measuring element is arranged adjacent to the first gas path, and the temperature measuring element is used for detecting the temperature of the first gas path.

7. The sample injection interface device according to claim 6, wherein, The injection interface device further includes a heat preservation module, and the heat preservation module is located in the hollow part.

8. The sample injection interface device according to claim 1, characterized in that, The female base is further provided with a sampling tube, the sampling tube passes through the female base through the first gas path, and opposite ends of the sampling tube extend out of opposite ends of the female base. One end of the sampling tube is in plug-in fit with the inner wall of the fourth gas path, and the other end of the sampling tube is used for capillary sampling.

9. The sample introduction interface device according to any one of claims 1-8, characterized in that, The third gas path includes a first branch and a second branch, the first branch and the second branch are perpendicularly arranged and communicated, the first branch is communicated with the first gas path, and the second branch is perpendicular to and communicated with the fourth gas path.

10. A mass spectrometer, characterized in that, The mass spectrometer includes the sampling interface device according to any one of claims 1-9.

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