Paper spray ionization source based on electric field theory and adjustable structure

Abstract

The invention discloses a paper spray ionization source based on an electric field theory and an adjustable structure, the paper spray ionization source comprises a PCB support I, a PCB support II, a screw, a nut, a paper cone tip support bracket and a paper cone main body support, the PCB support I, the paper cone tip support bracket and the PCB support II are vertically arranged on a substrate, the paper cone tip support bracket is arranged between the PCB support I and the PCB support II, and the paper cone main body support is arranged between the PCB support I and the PCB support II. The four corners of the first PCB support and the four corners of the paper cone tip supporting support are each provided with a screw connector, a screw penetrates through the middle of each screw connector, and each screw connector is sleeved with a nut. According to the paper spray ionization source design method based on the electric field theory and the adjustable structure, the electric field distance of the paper spray ionization source can be adjusted based on actual requirements and the corresponding electric field theory, a novel structure is designed, and meanwhile an electric field theoretical model corresponding to the structure is provided; the method has a theoretical guiding effect on actual adjustment of the paper spray ionization source.

Description

Technical Field

[0001] The invention relates to the technical field of electrical monitoring, and in particular to a paper spray ionization source based on electric field theory and an adjustable structure. Background Art

[0002] Paper spray ionization source is an emerging ionization technology. In recent years, it has attracted widespread attention in the fields of analytical chemistry. Its significance is mainly reflected in the rapid and convenient sample preparation and analysis process. Compared with traditional methods, paper spray technology can directly apply liquid samples on a paper base and generate ions through electric field spray, thereby achieving efficient analysis. It is especially suitable for fields that require rapid detection. In addition, the amount of sample required for paper spray ionization source is very small, which reduces sample requirements and analysis costs. The flexibility of this technology enables it to analyze a variety of compounds and adjust the spray conditions according to the characteristics of the sample, enhancing its wide application. The portability of paper spray ionization source makes it show great potential in on-site analysis. Its research and application not only improves the efficiency of analysis, but also promotes the technological development of analytical chemistry. It has important scientific research significance and practical application value.

[0003] At present, there are significant deficiencies in the structural design methods of paper spray ionization sources, especially in terms of adjustability and lack of theoretical guidance. Current designs often adopt a relatively single geometric structure and fail to fully consider the adjustable parameters required for different sample types and analysis requirements, such as electric field strength. This lack of flexibility in design limits the optimization and scope of application of ionization efficiency. At the same time, there is insufficient theoretical guidance in the design process, and there is a lack of relevant analysis of the electric field distribution during the spray process, which makes it impossible to effectively evaluate and optimize the design scheme before the experiment. Summary of the invention

[0004] In order to make up for the deficiencies of the prior art, the embodiments of the present application propose a paper spray ionization source based on electric field theory and an adjustable structure, so that the electric field spacing of the paper spray ionization source can be adjusted based on actual needs and corresponding electric field theory, so as to solve the problem that the current paper spray ionization source has a relatively single geometric structure and lacks adjustability and corresponding theoretical guidance as mentioned in the above background technology.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0006] A paper spray ionization source based on electric field theory and adjustable structure comprises a PCB bracket one, a PCB bracket two, screws, nuts, a paper cone tip support bracket and a paper cone main body bracket, wherein the PCB bracket one, the paper cone tip support bracket and the PCB bracket two are vertically arranged on a substrate, the paper cone tip support bracket is arranged between the PCB bracket one and the PCB bracket two, screw interfaces are respectively arranged at the four corners of the PCB bracket one and the paper cone tip support bracket, screws pass through the middle of the screw interfaces and nuts are sleeved thereon, and the spacing between the PCB bracket one, the PCB bracket two and the paper cone tip support bracket can be adjusted by connecting the screws and nuts, the paper cone main body bracket is conical, the paper cone main body bracket passes through the PCB bracket one, and holes are arranged at the positions of the paper cone tip support bracket and the PCB bracket two facing the top of the paper cone main body bracket.

[0007] As a further technical solution of the present invention: the PCB bracket 1 and the PCB bracket 2 are both PCB brackets with single-sided electrodes.

[0008] As a further technical solution of the present invention: the paper cone main body bracket is made of stainless steel.

[0009] As a further technical solution of the present invention: the PCB bracket 1, PCB bracket 2, screws, nuts, paper cone tip support bracket and paper cone main body bracket are all made of insulating materials.

[0010] As a further technical solution of the present invention: the paper cone passes through the PCB bracket 1 and the PCB bracket 2 to form two circles respectively, forming a coaxial circular ring, thereby establishing an ionization source theoretical model, wherein the radius of the large circular ring on the PCB bracket 1 is R1, the radius of the small circular ring on the PCB bracket 2 is R2, and the horizontal distance between the two circles is H, then the capacitance formula of the coaxial circular ring is:

[0011]

[0012] According to the relationship between charge and voltage:

[0013] Q=CV (2)

[0014] Among them, ∈0 is the electric constant of vacuum, ∈ r is the relative permittivity and L is the length between the two rings in the model.

[0015] As a further technical solution of the present invention: the relevant formula of the large ring is as follows:

[0016] Assume that the large ring is located in the z = 0 plane, the radius is R1, the charge is -Q, and the target point is a = (r a , z a );

[0017] The electric potential generated by the infinitesimal charge:

[0018] For a micro charge dq at a distance r, the electric potential is:

[0019]

[0020] Defining the infinitesimal charge

[0021] The infinitesimal charge dq is expressed as:

[0022]

[0023] In polar coordinates, θ is an angle, usually in radians, measured from some reference direction. In this model, we use dθ to describe the length of a small arc on the ring, and the formula shows the small charge distribution within this angle.

[0024] The distance r from the target point to the infinitesimal charge

[0025] The distance r is calculated as:

[0026]

[0027] Simplified:

[0028]

[0029] Substituting the above distance into the potential formula generated by the infinitesimal charge:

[0030]

[0031] Total potential

[0032] Integrating over the entire ring gives:

[0033]

[0034] As a further technical solution of the present invention: the relevant formula of the small ring is as follows:

[0035] Assume that the small ring is located in the z = H plane, the radius is R2, the charge is Q, and the target point is a = (r a , z a );

[0036] The distance r from the target point to the infinitesimal charge;

[0037] The distance r is calculated as:

[0038]

[0039] Simplified:

[0040]

[0041] The electric potential of the small ring is

[0042]

[0043] As a further technical solution of the present invention: total potential The superposition of two separate potentials gives:

[0044]

[0045] The specific formula is

[0046]

[0047] K(k) represents the complete elliptic integral of the first kind, defined as:

[0048]

[0049] The total potential formula is simplified by the first kind of complete elliptic integral:

[0050]

[0051] Therefore, equation (15) is the analytical solution of the electric field potential of the ionization source.

[0052] One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

[0053] The paper spray ionization source design method based on electric field theory and adjustable structure proposed in the present invention can realize that the electric field spacing of the paper spray ionization source can be adjusted based on actual needs and corresponding electric field theory. Not only a new structure is designed, but also an electric field theoretical model corresponding to the structure is proposed, which has a theoretical guiding role in the actual adjustment of the paper spray ionization source. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] Figure 1 This is a schematic diagram of the adjustable structure of the paper spray ionization source;

[0055] Figure 2 Schematic diagram of the theoretical model of ionization source. DETAILED DESCRIPTION

[0056] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0057] like Figure 1-2As shown, a paper spray ionization source based on electric field theory and adjustable structure includes a PCB bracket 1, a PCB bracket 2 4, a screw 6, a nut 2, a paper cone tip support bracket 3 and a paper cone main body bracket 5, wherein the PCB bracket 1, the paper cone tip support bracket 3 and the PCB bracket 2 4 are vertically arranged on a substrate 7, the paper cone tip support bracket 3 is arranged between the PCB bracket 1 and the PCB bracket 2 4, screw interfaces are respectively arranged at the four corners of the PCB bracket 1 and the paper cone tip support bracket 3, a screw 6 passes through the middle of the screw interface, and a nut 2 is sleeved thereon, and the spacing between the PCB bracket 1, the PCB bracket 2 4 and the paper cone tip support bracket 3 can be adjusted by connecting the screw 6 and the nut 2, the paper cone main body bracket 3 is conical, the paper cone main body bracket 3 passes through the PCB bracket 1, and holes are arranged at the positions of the paper cone tip support bracket 3 and the PCB bracket 2 4 facing the top of the paper cone main body bracket 5.

[0058] Here’s how it works:

[0059] The bracket and the electrode are made of PCB (1 part, 4 parts). The PCB board can be precisely processed and reduce the manufacturing cost. At the same time, the single-sided non-through electrode is designed to ensure the stability and accuracy of the electric field.

[0060] Screw interfaces (2 parts) are respectively provided at the four corners of the bracket, and the bracket spacing is adjusted by connecting the screws and nuts. By rotating the nuts, the electric field spacing can be accurately adjusted, thereby accurately controlling the electric field strength.

[0061] The bracket and screw nut materials are made of non-conductive materials to ensure the insulation performance of the bracket under high voltage electric field. At the same time, a bracket (3 parts) is designed for the paper cone to ensure that the relative position of the paper cone will not shift after being soaked by the sample solution, and the position where the spray is formed is located at the center of the electric field.

[0062] The paper cone bracket (5 parts) is made of stainless steel to have good mechanical strength and corrosion resistance.

[0063] The derivation of electric field theory plays an important role in optimizing the performance of ionization sources and improving the analytical accuracy and sensitivity of subsequent instruments. The derivation of electric field theory provides an important basis for numerical simulation and experimental verification. Based on theoretical derivation, mathematical models and simulation programs can be established to perform numerical simulations on the electric field distribution and behavior. The simulation results can guide the structural design of ionization sources and the optimization of related parameters, reducing trial and error costs and time.

[0064] The schematic diagram of the theoretical model of the adjustable paper spray ionization source designed in the present invention is as follows: Figure 2 As shown, through this model, relevant theoretical derivation is obtained.

[0065] The derivation process is as follows:

[0066] The capacitance formula of the coaxial ring is:

[0067]

[0068] According to the relationship between charge and voltage:

[0069] Q=CV (2)

[0070] (1) Derivation of relevant formulas for large circles:

[0071] Assume that the large ring is located in the z = 0 plane, the radius is R1, the charge is -Q, and the target point is a = (r a , z a ).

[0072] The electric potential generated by the tiny charge

[0073] For a micro charge dq at a distance r, the electric potential is:

[0074]

[0075] Defining the infinitesimal charge

[0076] The infinitesimal charge dq can be expressed as:

[0077]

[0078] The distance r from the target point to the infinitesimal charge

[0079] The distance r can be calculated as:

[0080]

[0081] Simplified:

[0082]

[0083] Substituting the above distance into the potential formula generated by the infinitesimal charge:

[0084]

[0085] Total potential

[0086] Integrating over the entire ring gives:

[0087]

[0088] (2) Derivation of relevant formulas for small rings

[0089] Assume that the small ring is located in the z = H plane, the radius is R2, the charge is Q, and the target point is a = (r a , z a ).

[0090] The distance r from the target point to the infinitesimal charge

[0091] The distance r can be calculated as:

[0092]

[0093] Simplified:

[0094]

[0095] The electric potential of the small ring is

[0096]

[0097] (3) Derivation of total potential

[0098] Total potential The superposition of two separate potentials gives:

[0099]

[0100] The specific formula is

[0101]

[0102] K(k) represents the complete elliptic integral of the first kind, defined as:

[0103]

[0104] The total potential formula is simplified by the first kind of complete elliptic integral:

[0105]

[0106]

[0107] Therefore, equation (15) is the analytical solution of the electric field potential of the ionization source.

[0108] Through the analytical solution, a series of related programs can be written and simulated to obtain the most suitable electrode ring radius and the relative distance between the two electrodes under certain voltage conditions, which has a theoretical guiding role in the actual production and corresponding adjustment of the paper spray ionization source. Other influencing factors can be further added based on this model to continue to improve the theoretical model.

[0109] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered exemplary and non-restrictive in all respects, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention.

[0110] In addition, it should be understood that although this specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment have also been appropriately combined to form other implementation modes that are easy for those skilled in the art to understand.

Claims

1. A paper spray ionization source based on electric field theory and adjustable structure, comprising a PCB bracket 1, a PCB bracket 2, screws, nuts, a paper cone tip support bracket and a paper cone main body bracket, characterized in that: The PCB bracket one, the paper cone tip support bracket and the PCB bracket two are all vertically arranged on the substrate, the paper cone tip support bracket is arranged between the PCB bracket one and the PCB bracket two, the PCB bracket one and the paper cone tip support bracket are respectively provided with screw interfaces at the four corners, the screw interfaces pass through the middle of the screw interfaces, and nuts are sleeved thereon, and the spacing between the PCB bracket one, the PCB bracket two and the paper cone tip support bracket can be adjusted by connecting the screws and nuts, the paper cone main body bracket is conical, the paper cone main body bracket passes through the PCB bracket one, and the paper cone tip support bracket and the PCB bracket two are provided with holes at positions opposite to the top of the paper cone main body bracket.

2. A paper spray ionization source based on electric field theory and adjustable structure according to claim 1, characterized in that: The PCB bracket 1 and the PCB bracket 2 are both PCB brackets with single-sided electrodes.

3. The paper spray ionization source based on electric field theory and adjustable structure according to claim 1, characterized in that: The paper cone main body bracket is made of stainless steel.

4. The paper spray ionization source based on electric field theory and adjustable structure according to claim 1, characterized in that: The PCB bracket 1, PCB bracket 2, screws, nuts, paper cone tip support bracket and paper cone main body bracket are all made of insulating materials.

5. The paper spray ionization source based on electric field theory and adjustable structure according to claim 1, characterized in that: The paper cone passes through PCB bracket 1 and PCB bracket 2 to form two circles, forming coaxial circular rings. The theoretical model of the ionization source is established, where the radius of the large circular ring on PCB bracket 1 is R1, the radius of the small circular ring on PCB bracket 2 is R2, and the horizontal distance between the two circles is H. The capacitance formula of the coaxial circular ring is: According to the relationship between charge and voltage: Q = CV (2) Among them, ∈0 is the electric constant of vacuum, ∈ r is the relative permittivity and L is the length between the two rings in the model.

6. The paper spray ionization source based on electric field theory and adjustable structure according to claim 1, characterized in that: The relevant formula for the great circle is as follows: Assume that the large ring is located in the z = 0 plane, the radius is R1, the charge is -Q, and the target point is a = (r a , z a ); The electric potential generated by the infinitesimal charge: For a micro charge dq at a distance r, the electric potential is: Defining the infinitesimal charge The infinitesimal charge dq is expressed as: The distance r from the target point to the infinitesimal charge The distance r is calculated as: Simplified: Substituting the above distance into the potential formula generated by the infinitesimal charge: Total potential Integrating over the entire ring gives:

7. A paper spray ionization source based on electric field theory and adjustable structure according to claim 6, characterized in that: The relevant formula for the small circle is as follows: Assume that the small ring is located in the z = H plane, the radius is R2, the charge is Q, and the target point is a = (r a , z a ); The distance r from the target point to the infinitesimal charge; The distance r is calculated as: Simplified: The electric potential of the small ring is 8. The paper spray ionization source based on electric field theory and adjustable structure according to claim 7, characterized in that: Total potential The superposition of two separate potentials gives: The specific formula is K(k) represents the complete elliptic integral of the first kind, defined as: The total potential formula is simplified by the first kind of complete elliptic integral: Therefore, equation (15) is the analytical solution of the electric field potential of the ionization source.

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