阅读说明：本技术 超高耐压深海膜进样结构及质谱系统 (Ultrahigh pressure-resistant deep sea film sample introduction structure and mass spectrum system ) 是由 黄泽建 高佳奇 方向 江游 戴新华 于 2021-09-10 设计创作，主要内容包括：本发明提供一种超高耐压深海膜进样结构及质谱系统。该进样结构包括：壳体、堵头、支撑连通部件、出样管和管状渗透膜；堵头、支撑连通部件和出样管均设于壳体的内部,且堵头、支撑连通部件和出样管由上至下依次连接,且出样管的第一端由壳体穿出；管状渗透膜套设于支撑连通部件的外侧,且管状渗透膜的第一端通过密封部件与堵头密封连接,管状渗透膜的第二端通过密封部件与出样管密封连接；管状渗透膜的内侧通过支撑连通部件支撑并与出样管的第二端连通。该质谱系统包括：外壳、质谱仪和上述超高耐压深海膜进样结构。本发明的进样结构提高了结构强度和密封性能,适用于深海作业,并结合质谱技术,实现对深海中物质的快速、在线、定性、定量分析。(The invention provides an ultrahigh pressure-resistant deep sea film sample introduction structure and a mass spectrum system. This advance a kind structure includes: the device comprises a shell, a plug, a supporting and communicating component, a sample outlet pipe and a tubular permeable membrane; the plug, the support communicating component and the sample outlet pipe are arranged in the shell, the plug, the support communicating component and the sample outlet pipe are sequentially connected from top to bottom, and the first end of the sample outlet pipe penetrates out of the shell; the tubular permeable membrane is sleeved outside the support communication component, the first end of the tubular permeable membrane is connected with the plug in a sealing mode through the sealing component, and the second end of the tubular permeable membrane is connected with the sample outlet pipe in a sealing mode through the sealing component; the inner side of the tubular permeable membrane is supported by the support communication component and communicated with the second end of the sample outlet pipe. The mass spectrometry system comprises: shell, mass spectrograph and above-mentioned super high withstand voltage deep sea membrane advance a kind structure. The sample injection structure improves the structural strength and the sealing performance, is suitable for deep sea operation, and realizes the rapid, on-line, qualitative and quantitative analysis of substances in deep sea by combining the mass spectrum technology.)

1. The utility model provides an ultrahigh withstand voltage deep sea membrane advances a kind structure which characterized in that includes:

the device comprises a shell, a sample inlet and a sample outlet, wherein the shell is provided with the sample inlet and the sample outlet which are connected with the shell;

a plug;

a support communication member;

the plug, the supporting and communicating component and the sample outlet pipe are all arranged in the shell, the plug, the supporting and communicating component and the sample outlet pipe are sequentially connected from top to bottom, and the first end of the sample outlet pipe penetrates out of the shell;

the tubular permeable membrane is sleeved outside the support communication component, the first end of the tubular permeable membrane is in sealing connection with the plug through a sealing component, and the second end of the tubular permeable membrane is in sealing connection with the sample outlet pipe through a sealing component;

the inner side of the tubular permeable membrane is supported by the support communication component and communicated with the second end of the sample outlet pipe.

2. The ultra-high pressure-resistant deep sea membrane sample injection structure as claimed in claim 1, wherein the sealing member is a sealant, the sealant is applied between the first end of the tubular permeable membrane and the plug, and the sealant is applied between the second end of the tubular permeable membrane and the sample outlet tube.

3. The ultra-high pressure-resistant deepwater sea film sampling structure as claimed in claim 1, wherein the sealing member comprises an "O" ring and a retainer ring, the "O" ring is arranged between the inner wall of the first end of the tubular permeable film and the outer wall of the plug, the "O" ring is arranged between the inner wall of the second end of the tubular permeable film and the outer wall of the sampling tube, and the retainer ring is respectively sleeved on the outer wall of the first end of the tubular permeable film and the outer wall of the second end of the tubular permeable film.

4. The ultra-high pressure-resistant deep sea membrane sample injection structure as claimed in claim 1, wherein the supporting and communicating member is a rod-shaped structure, and the rod-shaped structure has a porous structure thereon, and the porous structure is communicated between the inner side of the tubular permeable membrane and the second end of the sample outlet tube.

5. The ultra-high pressure-resistant deep sea membrane sample injection structure according to claim 1, wherein the plug, the support communicating component and the sample outlet pipe are tightly welded or integrally formed.

6. The sample injection structure of ultra-high pressure-resistant deep sea membrane as claimed in claim 1, further comprising a sampling pump and a temperature control system, wherein the sampling pump is disposed at the sample outlet, and the temperature control system is disposed on the casing.

7. A mass spectrometry system, comprising: the sample injection structure comprises a shell, a mass spectrometer and the sample injection structure for the ultra-high pressure-resistant deep sea film as claimed in any one of claims 1 to 6, wherein the mass spectrometer and the sample injection structure for the ultra-high pressure-resistant deep sea film are arranged inside the shell, and the mass spectrometer is connected with the first end of the sample outlet pipe.

8. The mass spectrometry system of claim 7, wherein the mass spectrometer comprises:

a vacuum system for providing a vacuum environment for mass spectrometry;

the ion source is used for ionizing a sample to be detected;

the mass analyzer is used for separating ions with different masses entering the mass analyzer according to the mass-to-charge ratio;

an ion detector for converting ions into an electron pulse;

and the data processing and display system is used for analyzing the received electronic pulse and displaying the electronic pulse.

9. The mass spectrometry system of claim 8,

the vacuum system includes: the vacuum cavity is provided with a sample inlet pipe connected with the first end of the sample outlet pipe, and the pump assembly is communicated with the vacuum cavity;

the ion source comprises an ionization chamber, a repulsion electrode, a filament and an ion lens, the sample inlet tube is communicated with the ionization chamber, a sample to be detected is ionized through the filament, is pushed out of the ionization chamber under the action of the repulsion electrode and is focused through the ion lens;

the mass analyzer is a quadrupole rod mass analyzer;

the ion detector includes an electron multiplier and a faraday cup.

10. The mass spectrometry system of claim 9,

the pump assembly comprises a turbo molecular pump and a diaphragm pump, and the diaphragm pump is communicated with the vacuum cavity through the turbo molecular pump.

Technical Field

The invention relates to the technical field of ocean exploration equipment, in particular to an ultrahigh pressure-resistant deep sea film sample injection structure and a mass spectrum system.

Background

Many methods and devices are currently used for marine detection, including conventional sensors, fluorescence spectroscopy, infrared spectroscopy, and raman spectroscopy, but they are not sensitive enough for substance detection and are often limited to detecting one or more substances or lack specificity for the substance to be detected. In order to rapidly and accurately carry out component structure identification on a deep sea sample, various detectors are often required to be integrated on a deep sea in-situ probe. However, this complicates the procedure and makes quantification difficult, which is disadvantageous for real-time in-situ detection of the ocean. The mass spectrometry has been widely used in many fields such as environment and industry, has the ability of identifying many chemical substances at low concentration, is very suitable for the field analysis of dissolved gas, light hydrocarbon and volatile organic compounds in marine environment, and has become a new important research direction in the analytical chemistry field in order to combine the strong analysis ability of mass spectrometry with the inherent advantages of in-situ sampling. Compared with ground application, the most important problem of applying mass spectrometry to analysis in deep sea is to solve the problem of sample injection under high pressure. Therefore, there is a need for a technique and apparatus that can perform on-site sampling and real-time analysis of Volatile Organic Compounds (VOCs), light hydrocarbon substances, etc. under high pressure.

Common sample introduction techniques for mass spectrometers include direct sample introduction, analytical sample introduction, spray sample introduction, and the like. The membrane sample injection is a sample injection technology which realizes sample injection by utilizing different permeability of chemical substances in the membrane. Compared with other sample introduction technologies, the membrane sample introduction system does not need sample preparation, has a simple sample introduction interface, reduces the gas load of the system, can selectively permeate specific substances, and has good reproducibility. The membrane sampling technology can be used for monitoring dissolved gas in measuring complex mixtures in environments, including swamps, water pools, forests, soil, glaciers and the like, and is also an important tool for analyzing the dissolved gas in seawater. The sample introduction system is used as a bridge and a pipeline for connecting a measured object and a mass spectrum ion source, and has very important function. The substances entering the mass spectrometry system are usually present in a gaseous state, but the measured substances in deep sea usually appear in a liquid state, and some key components of the mass spectrometer are often required to work under a high vacuum condition, which requires that the sample introduction system must be able to withstand the pressure difference between the deep sea and the high vacuum of the mass spectrometry device.

In the tubular membrane sampling structure that appears at present, utilize epoxy glue to bond porous supporting material and the stainless steel pipe of appearance, this kind of design intensity is limited, and under the effect of higher pressure difference, the kneck breaks very easily, and liquid can get into the mass spectrum from the kneck to lead to the analysis result mistake and even instrument damage, this just leads to it can not bear higher pressure yet, thereby has restricted the degree of depth that can carry out ocean in situ detection. Therefore, the in-situ detection depth of the current sample introduction technology and device under the deep sea environment is limited.

Disclosure of Invention

The invention provides an ultrahigh pressure-resistant deep sea film sample injection structure and a mass spectrum system, which are used for solving the defects that a film sample injection system in the prior art cannot bear overhigh pressure and cannot be applied to deep sea environment detection.

The invention provides an ultrahigh pressure-resistant deep sea film sample injection structure, which comprises:

the device comprises a shell, a sample inlet and a sample outlet, wherein the shell is provided with the sample inlet and the sample outlet which are connected with the shell;

a plug;

a support communication member;

the plug, the supporting and communicating component and the sample outlet pipe are all arranged in the shell, the plug, the supporting and communicating component and the sample outlet pipe are sequentially connected from top to bottom, and the first end of the sample outlet pipe penetrates out of the shell;

the tubular permeable membrane is sleeved outside the support communication component, the first end of the tubular permeable membrane is in sealing connection with the plug through a sealing component, and the second end of the tubular permeable membrane is in sealing connection with the sample outlet pipe through a sealing component;

the inner side of the tubular permeable membrane is supported by the support communication component and communicated with the second end of the sample outlet pipe.

According to the ultrahigh pressure-resistant deep sea film sample injection structure provided by the invention, the sealing part is the sealant, the sealant is coated between the first end of the tubular permeable film and the plug, and the sealant is coated between the second end of the tubular permeable film and the sample outlet pipe.

According to the ultrahigh pressure-resistant deep sea membrane sample injection structure provided by the invention, the sealing component comprises an O-shaped ring and a clamping ring, the O-shaped ring is arranged between the inner wall of the first end of the tubular permeable membrane and the outer wall of the plug, the O-shaped ring is arranged between the inner wall of the second end of the tubular permeable membrane and the outer wall of the sample outlet pipe, and the clamping ring is respectively sleeved on the outer wall of the first end of the tubular permeable membrane and the outer wall of the second end of the tubular permeable membrane.

According to the ultrahigh pressure-resistant deep sea membrane sample injection structure provided by the invention, the supporting and communicating part is of a rod-shaped structure, the rod-shaped structure is provided with a porous structure, and the porous structure is communicated between the inner side of the tubular permeable membrane and the second end of the sample outlet pipe.

According to the ultrahigh pressure-resistant deep sea film sample injection structure provided by the invention, the plug, the support communicating component and the sample outlet pipe are tightly welded or integrally formed.

The ultrahigh pressure-resistant deep sea membrane sample injection structure further comprises a sampling pump and a temperature control system, wherein the sampling pump is arranged at the sample outlet, and the temperature control system is arranged on the shell.

The present invention also provides a mass spectrometry system comprising: the sample injection structure comprises a shell, a mass spectrometer and the ultrahigh pressure-resistant deep sea film sample injection structure, wherein the mass spectrometer and the ultrahigh pressure-resistant deep sea film sample injection structure are both arranged in the shell, and the mass spectrometer is connected with a first end of a sample outlet pipe.

According to the present invention there is provided a mass spectrometry system, the mass spectrometer comprising:

a vacuum system for providing a vacuum environment for mass spectrometry;

the ion source is used for ionizing a sample to be detected;

the mass analyzer is used for separating ions with different masses entering the mass analyzer according to the mass-to-charge ratio;

an ion detector for converting ions into an electron pulse;

and the data processing and display system is used for analyzing the received electronic pulse and displaying the electronic pulse.

According to the present invention there is provided a mass spectrometry system, the vacuum system comprising: the vacuum cavity is provided with a sample inlet pipe connected with the first end of the sample outlet pipe, and the pump assembly is communicated with the vacuum cavity;

the ion source comprises an ionization chamber, a repulsion electrode, a filament and an ion lens, the sample inlet tube is communicated with the ionization chamber, a sample to be detected is ionized through the filament, is pushed out of the ionization chamber under the action of the repulsion electrode and is focused through the ion lens;

the mass analyzer is a quadrupole rod mass analyzer;

the ion detector includes an electron multiplier and a faraday cup.

According to the mass spectrum system provided by the invention, the pump assembly comprises a turbo molecular pump and a diaphragm pump, and the diaphragm pump is communicated with the vacuum cavity through the turbo molecular pump.

According to the ultrahigh pressure-resistant deep sea film sample injection structure, the plug and the sample outlet pipe are tightly connected to the two ends of the supporting and communicating component, and the structural stability of the device is improved due to the tight connection effect among the plug, the supporting and communicating component and the sample outlet pipe; and the tubular permeable membrane is hermetically sleeved on the outer side of the supporting and communicating component, and is not easy to damage due to the supporting effect of the supporting and communicating component. The sealing performance of the device is improved due to the sealing function of the sealing part at the end part of the tubular permeable membrane. By adopting the ultrahigh pressure-resistant deep sea film sample introduction structure, the structural strength and the sealing performance are improved, higher pressure can be borne, the ultrahigh pressure-resistant deep sea film sample introduction structure is suitable for deep sea operation, and the requirement of direct sampling on a deep sea site is met; in addition, the sample introduction structure can be used for sample introduction of a mass spectrometer in a deep sea environment and can also be used for high-pressure sample introduction application of analytical instruments such as a spectrum analyzer and an ion mobility spectrometer.

Furthermore, the invention also provides a mass spectrum system, which realizes the deep sea field sample injection by the sample injection structure and combines the rapid and accurate detection technology of mass spectrum, thereby realizing the rapid, on-line, qualitative and quantitative analysis of VOCs and light hydrocarbon substances in the deep sea.

Drawings

In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings needed for the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.

FIG. 1 is an external structural schematic diagram of an ultra-high pressure-resistant deep sea membrane sample injection structure provided by the invention;

fig. 2 is a schematic view of an internal structure of an ultra-high pressure-resistant deep sea film sample injection structure according to an embodiment of the present invention;

fig. 3 is a schematic view of an internal structure of an ultra-high pressure-resistant deep sea membrane sample injection structure provided in an embodiment of the present invention;

FIG. 4 is a schematic diagram of a mass spectrometry system provided by the present invention;

fig. 5 is a schematic structural diagram of a mass spectrometer provided by the present invention.

Reference numerals:

100: an ultrahigh pressure-resistant deep sea film sample injection structure; 200: a mass spectrometer;

300: a housing;

110: a housing; 120: a plug;

130: a support communication member; 140: a sample outlet pipe;

150: a tubular permeable membrane; 160: a temperature control system;

111: a sample inlet; 112: a sample outlet;

170: sealing glue; 181: an "O" ring;

182: a collar; 190: a sampling pump;

210: a vacuum chamber; 221: a turbomolecular pump;

222: a diaphragm pump; 230: a sample inlet pipe;

241: a repulsion pole; 242: a filament;

243: an ion lens; 244: an ionization chamber;

250: a quadrupole mass analyser; 261: an electron multiplier;

262: a Faraday cup; 270: a data processing and display system.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

An ultra-high pressure-resistant deep sea membrane sample injection structure 100 according to the present invention is described below with reference to fig. 1 to 3. This ultra-high withstand voltage deep sea membrane advances a kind structure 100 includes: a shell 110, a plug 120, a support communication member 130, a sample outlet tube 140 and a tubular permeable membrane 150.

The shell 110 is provided with a sample inlet 111 and a sample outlet 112 connected with the shell, the sample inlet 111 and the sample outlet 112 are directly communicated with the deep sea environment to be detected, and a seawater sample enters the shell 110 from the sample inlet 111.

The plug 120, the support communicating member 130 and the sample outlet tube 140 are disposed inside the casing 110, the plug 120, the support communicating member 130 and the sample outlet tube 140 are sequentially connected from top to bottom, and a first end of the sample outlet tube 140 penetrates out of the casing 110. The three can adopt integrated into one piece preparation or welding mode zonulae occludens, has improved structural strength, and end cap 120 and play appearance pipe 140 are located the both ends that support the communicating member 130 respectively, and play appearance pipe 140 can adopt corrosion-resistant stainless steel to make, and its external diameter can select different dimensions such as 1/16, 1/8 or 3 mm.

The tubular permeable membrane 150 is sleeved outside the support communication member 130, a first end of the tubular permeable membrane 150 is hermetically connected with the plug 120 through a sealing member, and a second end of the tubular permeable membrane 150 is hermetically connected with the sample outlet pipe 140 through a sealing member; the inside of the tubular permeable membrane 150 is supported by the support communication member 130 and communicates with the second end of the sampling tube 140. The tubular permeable membrane 150 is a hollow structure, is sleeved on the periphery of the support communicating member 130, is hermetically connected with the plug 120 and the sample outlet tube 140, and enters the seawater sample in the shell 110 from the sample inlet 111, and due to the selective permeation effect of the tubular permeable membrane 150, CO in the seawater sample₂、CH₄Permeants such as VOCs and the like are adsorbed on the outer surface of the tubular permeable membrane 150, then pass through the membrane to diffuse to the inner side of the membrane under the action of concentration gradient, and are desorbed on the inner surface of the membrane, and desorbed molecules enter the sample outlet pipe 140 through the supporting and communicating part 130 under the action of pressure (because the using environment is deep sea and the mass spectrometer 200 connected with the rear end is in a vacuum condition, a large pressure difference is formed between the inner side and the outer side of the tubular permeable membrane 150), and are discharged from the sample outlet pipe 140; while the seawater that has not passed through the permeable tubular membrane 150 is discharged through the outlet 112 of the housing 110.

It can be understood that the plug 120, the sample outlet tube 140 and the sealing member sealingly connect the tubular permeable membrane 150 to improve the sealing performance, so that the sample can only enter from the outer wall of the tubular permeable membrane 150 and be input into the mass spectrometer 200 through the support communicating member 130 and the sample outlet tube 140 before the seawater sample enters the mass spectrometer 200 because the plug 120 seals one end of the support communicating member 130.

In addition, the support communicating member 130 plays a role of supporting and communicating: on one hand, because of the pressure difference between the inside and the outside of the tubular permeable membrane 150, in order to avoid the rupture of the tubular permeable membrane 150, the tubular permeable membrane 150 is supported and protected from the inside by the support communication member 130; on the other hand, the support communication member 130 communicates between the tubular permeable membrane 150 and the sample outlet tube 140, and conveys the sample selectively permeated by the tubular permeable membrane 150 to the mass spectrometer 200 through the sample outlet tube 140 for detection.

It should be understood that the membrane sample injection technology refers to a pervaporation technology using a membrane, which realizes sample injection by means of a dissolution-diffusion mechanism, and can selectively permeate a specific substance without sample preparation and treatment. Different membrane materials have different permeability to substances, and may be classified into hydrophilic membranes and hydrophobic membranes (organophilic membranes), and in the embodiment of the present invention, a hydrophobic membrane is used, for example, a Polydimethylsiloxane (PDMS) membrane, and in addition, a styrene-based polymer membrane, a polyvinylidene fluoride (PVDF) membrane, a polyether amide block copolymer (PEBA) membrane, or other hydrophobic membranes may also be used. The PDMS membrane has excellent separation effect on organic matters and can effectively isolate gases such as nitrogen, oxygen and the like.

According to the ultrahigh pressure-resistant deep sea film sample introduction structure 100, the plug 120 and the sample outlet pipe 140 are tightly connected to the two ends of the supporting and communicating component 130, and the structural stability of the device is improved due to the tight connection effect among the plug 120, the supporting and communicating component 130 and the sample outlet pipe 140; the tubular permeable membrane 150 is hermetically sleeved outside the supporting and communicating member 130, and the tubular permeable membrane 150 is not easily damaged due to the supporting function of the supporting and communicating member 130. The sealing performance of the device is improved due to the sealing action of the sealing member at the end of the tubular permeable membrane 150. By adopting the ultrahigh pressure-resistant deep sea film sample introduction structure 100, the structural strength and the sealing performance are improved, higher pressure can be borne, the ultrahigh pressure-resistant deep sea film sample introduction structure is suitable for deep sea operation, and the requirement of direct sampling on a deep sea site is met; in addition, the sample injection structure not only can be used for sample injection of the mass spectrometer 200 in the deep sea environment, but also can be used for high-pressure sample injection application of analytical instruments such as a spectrum analyzer, an ion mobility spectrometer and the like.

The structure of the sealing member is explained below by two embodiments.

The first embodiment is as follows:

as shown in FIG. 2, the present embodiment is in the form of applying a sealant 170 to achieve a sealed connection between the tubular permeable membrane 150 and the connection between the plug 120 and the sampling tube 140. The sealant 170 is applied between the first end of the tubular permeable membrane 150 and the stopper 120, and the sealant 170 is applied between the second end of the tubular permeable membrane 150 and the sample outlet tube 140.

Specifically, in the present embodiment, the epoxy sealant 170 is used for coating and sealing, and it is understood that other forms of the sealant 170 may be used to achieve the sealing effect.

Example two:

as shown in FIG. 3, the present embodiment is in the form of a sealing ring, which is used to realize the sealing connection between the tubular permeable membrane 150 and the connection between the plug 120 and the sample outlet tube 140. The sealing member comprises an "O" ring 181 and a collar 182, the "O" ring 181 is disposed between the inner wall of the first end of the tubular permeable membrane 150 and the outer wall of the plug 120, the "O" ring 181 is disposed between the inner wall of the second end of the tubular permeable membrane 150 and the outer wall of the sample outlet tube 140, and the collar 182 is respectively sleeved on the outer wall of the first end of the tubular permeable membrane 150 and the outer wall of the second end of the tubular permeable membrane 150.

Specifically, grooves for installing the "O" ring 181 are formed in the outer wall of the stopper 120 and the outer wall of the sample outlet pipe 140, and the collar 182 is arranged at the same height as the "O" ring 181, so as to perform the fixing and sealing functions. The sealing effect is achieved by the "O" ring 181 and the collar 182, and other types of sealing ring arrangements can be used.

In one embodiment of the present invention, the supporting and communicating member 130 is a rod-shaped structure, and the rod-shaped structure has a porous structure, and the porous structure is communicated between the inner side of the tubular permeable membrane 150 and the second end of the sample outlet tube 140. In this embodiment, the rod-like structure mainly plays a role of supporting the tubular permeable membrane 150 to avoid damage; the porous structure thereon can transport the sample passing through the tubular permeable membrane 150 to the sample outlet tube 140. Specifically, the supporting and communicating member 130 of the present embodiment may be in the form of a mesh sintered rod with a certain strength, the material of the supporting and communicating member may be an alloy of metals such as stainless steel, titanium, and the like, or a mixture thereof, the plug 120, the supporting and communicating member 130, and the sampling tube 140 may be tightly welded together by using laser welding, argon arc welding, vacuum electron beam welding, and the like, or may be directly integrally processed, and the tubular permeable membrane 150 is directly and tightly sleeved outside the three.

In one embodiment of the present invention, the ultra-high pressure-resistant deep sea membrane sample injection structure 100 further includes a temperature control system 160, and the temperature control system 160 is disposed on the casing 110. Because the permeability of the membrane can be changed by the temperature, the temperature inside the shell 110 is kept constant, generally 20-80 ℃, by the temperature control system 160, and the influence of the external seawater environment temperature on the detection result is avoided.

In one embodiment of the present invention, the ultra-high pressure-resistant deep sea membrane sample injection structure 100 further includes a sampling pump 190, the sampling pump 190 is disposed at the sample outlet pipe 140, and after the sampling pump 190 is turned on, seawater enters the inside of the housing 110 through the sample inlet 111.

As shown in fig. 4 and 5, the present invention also provides a mass spectrometry system. The mass spectrometry system comprises: the casing 300, the mass spectrometer 200 and the ultra-high pressure-resistant deep sea film sample injection structure 100 provided by the embodiment of the invention are provided, the mass spectrometer 200 and the ultra-high pressure-resistant deep sea film sample injection structure 100 are both arranged inside the casing 300, and the mass spectrometer 200 is connected with the first end of the sample outlet pipe 140.

In the embodiment, the deep-sea field sample introduction is realized through the sample introduction structure, and the rapid and accurate detection technology of mass spectrum is combined, so that the rapid, online, qualitative and quantitative analysis of the VOCs and the light hydrocarbon substances in the deep sea is realized.

It should be appreciated that because the mass spectrometry system is in a deep sea environment, the housing 300 is a waterproof, pressure resistant housing that avoids damage to the internal devices from water pressure.

In one embodiment of the present invention, mass spectrometer 200 comprises:

a vacuum system for providing a vacuum environment for mass spectrometry;

the ion source is used for ionizing a sample to be detected;

the mass analyzer is used for separating ions with different masses entering the mass analyzer according to the mass-to-charge ratio;

an ion detector for converting ions into an electron pulse;

and a data processing and display system 270 for analyzing and displaying the received electronic pulse.

Further, as shown in fig. 5, the vacuum system includes: a vacuum chamber 210 and a pump assembly, wherein the vacuum chamber 210 is provided with a sample inlet tube 230 connected with a first end of the sample outlet tube 140, and the pump assembly is communicated with the vacuum chamber 210. The sample inlet tube 230 and the sample outlet tube 140 may be connected by threads, flanges, welding, or clamps.

The ion source comprises an ionization chamber 244, a repulsion electrode 241, a filament 242 and an ion lens 243, the sample injection tube 230 is communicated with the ionization chamber 244, a sample to be tested is ionized through the filament 242, and is pushed out of the ionization chamber 244 under the action of the repulsion electrode 241 and focused through the ion lens 243. Vacuum ion sources such as electron impact ionization (EI) sources, ultraviolet light ionization sources, glow discharge-electron impact ionization (GDEI) sources, and the like can be used.

The mass analyzer is a quadrupole mass analyzer 250, and a small mass analyzer such as an ion trap may be used.

The ion detector comprises an electron multiplier 261 and a faraday cup 262, or a microchannel plate, among other different detector combinations.

Further, the pump assembly includes a turbo-molecular pump 221 and a diaphragm pump 222, and the diaphragm pump 222 communicates with the vacuum chamber 210 through the turbo-molecular pump 221. The diaphragm pump 222 can be replaced by a mechanical pump or a dry pump, and the turbomolecular pump 221 can be replaced by an ion pump or a getter pump.

When the mass spectrometry system works, the diaphragm pump 222 is started first and reaches the starting vacuum of the turbo-molecular pump 221, and then the turbo-molecular pump 221 is started to realize the high vacuum working environment of the mass spectrometry. In order to avoid the influence of the external environment temperature change on the vacuum inside the system, in this example, the heating jacket is coated outside the mass spectrum vacuum cavity 210, and the temperature control system 160 is used for controlling the constant temperature of the heating jacket, so that the analysis stability of the mass spectrum system is ensured. The molecules delivered from the sample outlet tube 140 are introduced into the ionization chamber 244 of the ion source through the sample inlet tube 230, and are ionized by the electrons generated by the filament 242, and the hardness of the electron bombardment ionization can be adjusted by changing the electron energy. The ions produced by ionization are pushed out of the ionization chamber 244 by the repeller 241, pulled out and focused by the ion lens 243, and then enter the entrance of the quadrupole mass analyzer 250. Quadrupole mass analyser 250 analyses and selects ions according to mass to charge ratio, after which they reach a detector. When the ion signal intensity is high, the Faraday cup 262 can be directly adopted for ion collection, and then the current amplification is realized through the current amplifier for detection; when the ion signal intensity is weak, the ion current is amplified by the electron multiplier 261, then the ion current is amplified by the current amplifier and then detected, and finally the mass spectrogram of the analyzed substance is displayed by the data processing and display system 270.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.