A paper spray ionization source based on electric field theory and adjustable structure

Abstract

The present invention discloses a paper spray ionization source based on electric field theory and an adjustable structure, comprising a first PCB bracket, a second PCB bracket, screws, nuts, a paper cone tip support bracket, and a paper cone main body bracket. The first PCB bracket, the paper cone tip support bracket, and the second PCB bracket are all vertically arranged on a substrate, the paper cone tip support bracket is arranged between the first PCB bracket and the second PCB bracket, and screw interfaces are respectively provided at the four corners of the first PCB bracket and the paper cone tip support bracket. A screw passes through the middle of the screw interface and is sleeved with a nut. The design method of the paper spray ionization source based on electric field theory and an adjustable structure proposed by 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 is a new structure designed, but also an electric field theoretical model corresponding to the structure is proposed, which provides theoretical guidance for the 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] The paper spray ionization source is an emerging ionization technology that has attracted widespread attention in fields such as analytical chemistry in recent years. Its significance lies primarily in its rapid and convenient sample preparation and analysis process. Compared with traditional methods, paper spray technology can directly apply liquid samples to a paper substrate and generate ions through electric field spray, thereby achieving efficient analysis. It is particularly suitable for fields requiring rapid detection. In addition, the paper spray ionization source requires a very small amount of sample, reducing sample requirements and analysis costs. The flexibility of this technology enables the analysis of a variety of compounds and the adjustment of spray conditions according to sample characteristics, enhancing its versatility. The portability of the paper spray ionization source gives it great potential in on-site analysis. Its research and application not only improves analytical efficiency but also promotes the technological development of analytical chemistry. It has important scientific research significance and practical application value.

[0003] Current structural design methods for paper spray ionization sources have significant shortcomings, particularly in terms of adjustability and theoretical guidance. Current designs often employ relatively simple geometries and fail to fully consider the adjustable parameters, such as electric field strength, required for different sample types and analytical requirements. This lack of flexibility limits the optimization of ionization efficiency and its scope of application. Furthermore, insufficient theoretical guidance and a lack of analysis of the electric field distribution during the spray process prevent effective evaluation and optimization of design solutions before experiments. Summary of the Invention

[0004] In order to make up for the shortcomings of the existing technology, 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 raised in the above background technology that the current paper spray ionization source has a relatively simple geometric structure and lacks adjustability and corresponding theoretical guidance.

[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 an adjustable structure includes a PCB bracket 1, a PCB bracket 2, screws, nuts, a paper cone tip support bracket and a paper cone main body bracket. The PCB bracket 1, the paper cone tip support bracket and the PCB bracket 2 are all vertically arranged on a substrate. The paper cone tip support bracket is arranged between the PCB bracket 1 and the PCB bracket 2. Screw interfaces are respectively provided at the four corners of the PCB bracket 1 and the paper cone tip support bracket. Screws pass through the middle of the screw interfaces and are sleeved with nuts. The distance between the PCB bracket 1, the PCB bracket 2 and the paper cone tip support bracket can be adjusted by connecting the screws and nuts. The paper cone main body bracket is conical and passes through the PCB bracket 1. The paper cone tip support bracket and the PCB bracket 2 are provided with holes at positions opposite to 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, a paper cone passes through PCB bracket 1 and PCB bracket 2, respectively, to form two circles, forming coaxial rings. This is used to establish a theoretical model of the ionization source. The radius of the large ring on PCB bracket 1 is R1, the radius of the small ring on PCB bracket 2 is R2, and the horizontal distance between the two circles is H. The capacitance formula of the coaxial rings 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, has a radius of R1, a charge of -Q, and a target point of a=(r a , z a );

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

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

[0019]

[0020] Defining infinitesimal charge

[0021] The infinitesimal charge dq is expressed as:

[0022]

[0023] In polar coordinates, θ is an angle, usually measured 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 electric 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, has a radius of R2, a charge of Q, and a target point of 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 yields:

[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 this 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 Schematic diagram of the adjustable structure of the paper spray ionization source;

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

[0056] The following is a clear and complete description of the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts 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 all 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, and screw interfaces are respectively provided 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 is sleeved with a nut 2, and the distance between the PCB bracket 1, the PCB bracket 2 4 and the paper cone tip support bracket 3 is 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 provided 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 electrodes are made of PCB (1 part, 4 parts). The PCB board can be precisely processed and reduce manufacturing costs. At the same time, the design of single-sided non-through electrodes ensures the stability and accuracy of the electric field.

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

[0061] The bracket and screws are made of non-conductive materials to ensure insulation performance under high-voltage electric fields. A three-part bracket is also designed for the paper cone to ensure that its relative position does not shift after being soaked with the sample solution, and the spray is formed 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 a crucial role in optimizing the performance of ionization sources and improving the analytical accuracy and sensitivity of subsequent instrumentation. This derivation provides a crucial foundation for numerical simulations and experimental verification. Based on this theoretical derivation, mathematical models and simulation programs can be developed to numerically simulate the electric field distribution and behavior. The simulation results can guide the structural design of ionization sources and the optimization of related parameters, reducing the cost and time of trial and error.

[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 in Figure 2, through this model, relevant theoretical deductions are 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, has a radius of R1, a charge of -Q, and a target point of a=(r a , z a ).

[0072] The electric potential generated by the infinitesimal charge

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

[0074]

[0075] Defining 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 electric 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, has a radius of R2, a charge of Q, and a target point of 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 yields:

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

[0107] The analytical solution enables a series of related programming and simulations to determine the optimal electrode ring radius and the relative distance between the two electrodes under certain voltage conditions. This provides theoretical guidance for the actual production and adjustment of paper spray ionization sources. This model can also be further refined by adding other influencing factors.

[0108] 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 invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations that come within the meaning and range of equivalents of the claims be embraced therein.

[0109] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method 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 methods that are easy for those skilled in the art to understand.

Claims

1. A paper spray ionization source based on electric field theory and an adjustable structure, comprising a first PCB bracket, a second PCB bracket, screws, nuts, a paper cone tip support bracket, and a paper cone body bracket, characterized in that: The PCB bracket 1, the paper cone tip support bracket and the PCB bracket 2 are all vertically arranged on the substrate. The paper cone tip support bracket is arranged between the PCB bracket 1 and the PCB bracket 2. The PCB bracket 1 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 are sleeved with nuts. The distance between the PCB bracket 1, the PCB bracket 2 and the paper cone tip support bracket is adjusted by connecting the screws and nuts. The paper cone main body bracket is conical, and the paper cone main body bracket passes through the PCB bracket 1. The paper cone tip support bracket and the PCB bracket 2 are provided with holes at the positions opposite to the top of the paper cone main body bracket.

2. The 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, forming two circles, forming a coaxial ring. Based on this, a theoretical model of the ionization source is established. The radius of the large ring on PCB bracket 1 is R1, the radius of the small ring on PCB bracket 2 is R2, and the horizontal distance between the two circles is H. The capacitance formula of the coaxial 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, has a radius of R1, a charge of -Q, and a target point of a=(r a , z a ); The electric potential generated by the infinitesimal charge: For an infinitesimal charge dq at a distance r, the electric potential is: Defining 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 electric potential formula generated by the infinitesimal charge: Total potential Integrating over the entire ring gives:

7. The 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, has a radius of R2, a charge of Q, and a target point of 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 yields: 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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