39 results about "Electro spray" patented technology

The invention relates to a counter-ion adsorption high-voltage electrostatic spraying device and application thereof to preparation of a food sugar coating, and belongs to the technical field of equipment machinery and food processing. The device comprises a material conveying system, a high-voltage electrostatic spraying system, a sugar liquid supply system, a gas supply system, a sugar liquid recovery system, a microwave vacuum drying system and a control cabinet, the sugar liquid supply system and the gas supply system are both connected with the high-voltage electrostatic spraying system, the material conveying system is arranged below the high-voltage electrostatic spraying system, the material conveying system is connected with the microwave vacuum drying system, and the sugar liquid recovery system is further arranged below the material conveying system; the above systems are all controlled by a control cabinet. Through pulse switching of a high-voltage electrostatic field and a sugar liquid material, counter-ion charge accumulation of sprayed sugar liquid is realized, namely, positive charge sugar liquid (chitosan and the like) and negative charge sugar liquid (Arabic gum, carrageenan and the like) are alternately sprayed under the high-voltage electrostatic field, so that electrostatic adsorption and directional deposition of the sugar liquid on the surface of food are realized.

The invention discloses an integrated electrospray thruster transmitting module based on a 3D printing technology, and belongs to the technical field of spaceflight. The integrated electrospray thruster transmitting module is an integrated component which is integrally formed through a micro three-dimensional photoetching 3D printing technology, and a continuous fluid transmission channel from a liquid supply connector at the bottom end to a transmitting nozzle at the top end is arranged in the integrated electrospray thruster transmitting module; in the fluid flowing direction, the integrated electrospray thruster transmitting module sequentially comprises a liquid supply interface layer, a multi-layer flow channel structure and a transmitting layer from bottom to top. Integrated forming and high integration of the complex micro-channel structure are achieved, the array liquid supply uniformity is improved through the forked micro-channel structure, the size of sprayed liquid drops and the single-hole flow are reduced, and therefore emitter miniaturization is achieved, and the overall emission performance and working stability of the electrospray thruster are improved.

A heating device and a mass spectrometry device of a nanoelectrospray source, the heating device comprising: a support body and a heating body arranged on the support body, the heating body being configured to apply a heating effect to an ion transmission path and being provided with an ion transmission channel for the passage of ions or charged droplets; an ion inlet of the ion transmission channel corresponding to an ion outlet of the nanoelectrospray source, and an ion outlet of the ion transmission channel corresponding to an ion inlet of the mass spectrometer. The heating device can significantly improve the atomization and desolvation capability of the nanoelectrospray source, improve the signal response and repeatability, reduce the ion cluster background noise formed by solvent molecules, improve the sensitivity, and avoid the spray stop and signal loss caused by the heat-sensitive drying of the nanoelectrospray ion source at the end of the spray needle.

The invention relates to the field of detection, in particular to a method for determining the residual quantity of methoprene and methoprene in citrus through pre-column derivatization liquid chromatography-tandem mass spectrometry, and the method comprises the following steps: S1, preparation of a standard sample and a to-be-detected sample: S11, preparation of the standard sample, and S12, preparation of the to-be-detected sample; s2, preparation and derivation of a standard sample solution and a to-be-detected sample solution: S21, extraction, S22, purification and S23, derivation; s3, measuring; s4, establishing a linear equation; and S5, analyzing the sample to be detected. The technical problems that in the prior art, the ionization efficiency of methoprene and methoprene in the electrospray process is low due to the non-polar property of methoprene and methoprene, and electrospray ionization tandem mass spectrometry detection of methoprene and methoprene lacks the sensitivity required by trace analysis can be solved. The detection sensitivity of methoprene and methoprene in citrus fruits can be obviously improved.

The application discloses an electrostatic sprayer, which comprises a sprayer body, a handheld part connected with the sprayer body, a nozzle assembly arranged at one end of the sprayer body, and an electrostatic switch arranged at the other end of the sprayer body; an ion generator, a diaphragm pump and an electrostatic electrode are arranged in the sprayer body; a discharge needle is connected to the shell of the sprayer body; a solution kettle is connected to the bottom of the sprayer body; a power switch and a waterproof battery pack are arranged on the handheld part; the ion generator, the electrostatic electrode, the power switch, the discharge needle and the waterproof battery pack are connected through wires; the solution kettle, the diaphragm pump, the electrostatic electrode and the nozzle assembly are connected through a water pipe; the solution in the solution kettle flows to the electrostatic electrode through the water pipe, is charged and is sprayed out of the nozzle assembly. The application can realize human body discharge and tip discharge, and has strong waterproof performance and adsorption effect.

This invention discloses an electrospray extraction / photoionization composite ion source for atmospheric pressure interface mass spectrometry, belonging to the field of mass spectrometry detection. It includes a sample transport and ionization mechanism, an extraction electrospray mechanism, and a vacuum ultraviolet light source mechanism. The extraction electrospray mechanism is fixedly connected to the sample transport and ionization mechanism, and the sample transport and ionization mechanism is fixedly connected to the vacuum ultraviolet light source mechanism. This invention utilizes the aforementioned electrospray extraction / photoionization composite ion source for atmospheric pressure interface mass spectrometry, enabling efficient ionization of gaseous and particulate organic components of different polarities, volatility, and molecular weights in the air. Through a reasonable structural design, it can operate under atmospheric pressure conditions, achieving the purpose of coupling with atmospheric pressure interface mass spectrometry.

The invention discloses an electrofluid spray film-making device, which belongs to the technical field of electrospray film-forming, and comprises a shell, a plurality of spray head assemblies, a liquid supply assembly, a gas supply assembly and a power supply module, a sealed cavity is formed in the shell, the multiple spray head assemblies are all installed on the shell, and each spray head assembly comprises a capillary tube and a protective sleeve which are coaxially arranged; a first channel and a second channel are formed in the protective sleeve, the capillary tube is coaxially sleeved with the first channel, the top end of the first channel is closed, the bottom end of the first channel extends out of the sealing cavity, and the second channel communicates with the sealing cavity and the first channel; the top end of each sealed chamber capillary tube penetrates out of the closed end of the first channel, and the bottom end of each sealed chamber capillary tube extends out of the bottom end of the first channel and faces the receiving substrate; the liquid supply assembly is used for inputting liquid into the capillary tubes of all the sealing cavities, the gas supply assembly is used for inputting gas into the sealing cavities, and the power supply module is used for providing high-voltage electricity for the capillary tubes of the sealing cavities.

The invention relates to a transmission desorption electrospray low-pressure ion mobility spectrometry which comprises a transmission desorption electrospray ion source, an interface electrode and a low-pressure ion migration tube, the interface electrode is a metal sheet electrode with a through hole in the center, and the transmission desorption electrospray ion source is connected with the low-pressure ion migration tube through the interface electrode. The ion mobility spectrometry can realize efficient desorption spray ionization of substances difficult to volatilize in the detection process, the sample detection process is simplified, the working air pressure is lower than the atmospheric pressure, the detection sensitivity can be improved, furthermore, the ion mobility spectrometry is provided with a desolvation area and is combined with desolvation gas, the detection sensitivity can be further improved, and the detection accuracy is improved. High-sensitivity detection of anesthetic drugs such as propofol, etomidate, fentanyl and the like in blood can be realized through transmission-type desorption electrospray and low-pressure ion mobility spectrometry.

The application belongs to the technical field of electrostatic spraying of plant protection aviation, and particularly relates to a quick-release electrostatic centrifugal nozzle. The quick-release centrifugal nozzle is powered by an integrated motor, and the motor power output end drives the quick-release centrifugal rotating disc to rotate. The integrated motor power output end and the quick-release centrifugal rotating disc are connected through a quick-release structure, and a spring is arranged between the concave hole and the convex block. When the quick-release centrifugal rotating disc needs to be replaced, the quick-release centrifugal rotating disc is pushed inward, and the spring is compressed. Since the convex block of the quick-release centrifugal rotating disc is an arc-shaped structure with a narrow front and a wide rear, the quick-release centrifugal rotating disc is rotated to an angle without the concave hole of the motor output end, and then the quick-release centrifugal rotating disc can be quickly pulled out. The convex block of the quick-release centrifugal rotating disc of another structure is inserted into the concave hole of the motor output end, and the replacement of the quick-release centrifugal rotating disc is completed.

This invention discloses a method for preparing a positively charged nanofiltration membrane using 3D electrostatic spray printing. The method includes the following steps: S1, uniformly mixing a polymeric membrane matrix material, a pore-forming agent, a membrane modifier, and an organic solvent, and preparing a support membrane for the nanofiltration membrane via a phase inversion method; S2, using piperazine and trimesoyl chloride as the aqueous and organic phase monomers, respectively, spraying the monomer solution onto the polymeric support membrane using 3D electrostatic spray printing to prepare a piperazine-trisoyl chloride intermediate layer; S3, using polyethyleneimine and trimesoyl chloride as the aqueous and organic phase monomers, respectively, spraying the monomer solution onto the intermediate layer using 3D electrostatic spray printing to prepare a polyethyleneimine-trisoyl chloride positively charged outer layer. After heat treatment, the positively charged nanofiltration membrane is obtained. This invention provides a simple, precise, and controllable method for preparing a positively charged nanofiltration membrane, which exhibits good selective separation ability for magnesium ions and lithium ions.

The invention relates to a fertilizing device capable of adjusting the fertilizing amount for navel orange planting and a use method of the fertilizing device, and the fertilizing device comprises a walking carrier, a liquid medicine supply system, an electrostatic spraying system, a canopy information sensing system and an intelligent control system. The intelligent control system dynamically adjusts the voltage applied to the suppression electrode array according to the density of the upper portion of the tree crown and the target fruit area information of the middle and lower portions obtained by the sensing system, so that a downward repulsion electrostatic field with controllable intensity is generated, the electric field forces charged fog drops to move towards the middle and lower portions of the tree crown, active control over the fertilizer liquid space deposition position is achieved, and the fertilizer liquid space deposition position is controlled. Meanwhile, the system cooperatively adjusts the spray flow, finally, precise and adjustable feeding of the fertilization deposition amount of the target area on the middle and lower portions of the crown is achieved, the problem that a traditional leaf fertilizer cannot effectively cover the inner chamber and fruits on the middle and lower portions is solved, precise fertilization according to needs is achieved, the fertilizer utilization rate is increased, and waste and pollution are reduced.

The invention discloses a desorption electrospray and secondary photoionization mass spectrometry imaging device combined with an ion funnel, which comprises a double-light-source secondary ionization component, a two-stage ion funnel, a desorption electrospray ionization source and a three-degree-of-freedom displacement imaging platform for carrying a glass slide of a measured object, the desorption electrospray ionization source is arranged above the three-degree-of-freedom displacement imaging platform and located on one side of the glass slide, an electrospray sampling pipe for sampling molecule-ion droplet clusters is arranged at an inlet of the double-light-source secondary ionization assembly, and the electrospray sampling pipe is arranged above the three-degree-of-freedom displacement imaging platform and located on the other side of the glass slide; an outlet of the double-light-source secondary ionization assembly is connected with an inlet of the two-stage ion funnel, and an outlet of the two-stage ion funnel is externally connected with mass spectrometry equipment. Through the integrated design of double-light-source same-cavity secondary ionization, gas phase doping and the two-stage ion funnel, the ionization efficiency and the ion transmission efficiency of the to-be-analyzed object can be remarkably improved.

The invention relates to a method for detecting tertiary amine type niash substances. The method aims at solving the problems that in electrospray ionization source mass spectrometry analysis of tertiary amine type niash substances, parts with structural differences are lost in the form of neutral fragments, mass spectrometry data of the tertiary amine type niash substances are basically the same, and qualitative analysis of structural identification cannot be carried out through the mass spectrometry data. According to the invention, a tertiary amine type niash substance is converted into a corresponding N-oxide through an oxidation pretreatment method, and the protonation position of the tertiary amine type niash substance in an electrospray ion source is changed, so that a part with functional group difference in the structure can generate fragments with positive electrons, and the characteristics of functional groups in the structure are reflected; the purpose of structural identification qualitative analysis through mass spectrum characteristic fragment data is achieved. The method is simple and convenient to operate, is suitable for mass spectrometry of a conventional electrospray ionization source and a neutral gas collision cell, and can provide an effective technical means for reliable identification and judicial expertise of the substance.

The invention relates to a supercritical anti-solvent-electrostatic spray coupling system which comprises a supercritical anti-solvent generation module, a material mixing module and an electrostatic atomization module which are sequentially connected through a connecting pipeline, and a time-space synchronization control module which is in communication connection with the supercritical anti-solvent generation module and the electrostatic atomization module. The space-time synchronous control module cooperatively controls the oscillating electric field and the pressure of the supercritical anti-solvent, so that the electric field jet breaking of the material is realized by the electric field force, and the absolute value of the difference value between the Taylor cone forming time and the supercritical anti-solvent diffusion time is controlled within a set range, so that the supercritical anti-solvent permeates into liquid drops within a millisecond-level time scale; the invention discloses a preparation method of brain-targeted nano-particles, which comprises the following steps: dissolving a solvent in a solvent to trigger a sudden drop effect of polarity of the solvent, so that solute is instantaneously crystallized, and finally a nano-suspension with a particle size of less than 200nm and uniform particle size distribution (PDilt: 0.2) is formed, is suitable for preparing brain-targeted nano-particles with high drug loading capacity and small particle size, and can effectively cross a blood-brain barrier (BBB) to realize continuous and green production.

The invention provides an electrochemical-mass spectrometry device based on an integrated electrode plate, and relates to the technical field of analytical chemistry, the device comprises a mass spectrometer and an electrochemical reaction device, the mass spectrometer is provided with a sample inlet, and the electrochemical reaction device comprises an electrochemical workstation and an electrochemical reaction platform; the electrochemical reaction platform is a patterned electrode assembly and comprises an insulating base material with at least one hydrophilic sharp corner and three electrodes which are located in the hydrophilic sharp corner area and are electrically isolated from one another; the three electrodes are a working electrode, a counter electrode and a reference electrode, the working electrode is arranged at the tip of the hydrophilic sharp corner, and the tip of the hydrophilic sharp corner is arranged opposite to the sample inlet; the floating work station is connected with the patterned electrode assembly. The device provided by the invention can realize the combination of electrochemistry, electrospray and mass spectrum devices, is simple and convenient to operate, and can improve the electrochemical detection efficiency and detection accuracy.

The invention relates to the technical field of biochemical detection, in particular to a sample pretreatment method, a method for detecting the ratio of 5-methylcytosine to cytosine and a kit. The sample pretreatment method comprises the following steps: providing a sample containing substances to be detected, wherein the substances to be detected comprise 5-methylcytosine and cytosine; the method comprises the following steps: mixing magnetic beads containing sulfonic acid groups with a sample, carrying out adsorption treatment, and then carrying out leaching treatment by using an alcoholic solution to obtain a to-be-detected substance-magnetic bead compound; eluting the to-be-detected substance-magnetic bead compound by using the eluent to obtain a to-be-detected sample; the eluent comprises at least one of a formic acid-alcohol solution and an ammonia water-alcohol solution. The sample pretreatment method is simple in process and low in cost, the to-be-detected sample containing the 5-methylcytosine and the cytosine can be efficiently obtained, the ratio of the 5-methylcytosine to the cytosine can be accurately quantified in a high-sensitivity mode on the basis of the electrospray high-efficiency ion mobility spectrometry technology subsequently, and the method has good application prospects.

The invention discloses a constant-current self-adaptive voltage charged spraying device for submicron aerosol removal and a working method of the constant-current self-adaptive voltage charged spraying device, and belongs to the field of aerosol pollution control. The problems that in the prior art, the maintenance cost is high due to the fact that the technology depends on a large WESP structure, and efficiency fluctuation and system instability are easily caused by edge corona and current grabbing phenomena are solved. The device comprises a constant-current high-voltage power supply which is used for providing set total current and automatically adjusting output voltage according to load equivalent resistance; the coaxial double-ring electrodes are connected to the constant-current high-voltage power supply and keep the same potential, and the coaxial double-ring electrodes are arranged around the axis of the nozzle and used for constructing axial electric field distribution of a spraying area and restraining edge corona; the Jacob ladder electric arc stabilizing branch is electrically connected with the coaxial double-ring electrode; and the spraying conductive branch comprises a grounding nozzle and an equivalent resistance section formed by air and fog drops in the spraying area, and the spraying conductive branch is connected with the Jacob ladder arc stabilizing branch in parallel. The method is used for nuclear decommissioning, chemical tail gas fine treatment and other scenes.

The invention provides an in-situ inactivation stabilization and rapid mass spectrometry detection method for a sputum sample, which comprises the following steps: mixing the sputum sample collected in a sputum collector with a stabilizer on a sample collection site, and sealing and uniformly shaking to obtain a viscous sample mixed solution; the stabilizer is an ethanol solution with the volume percent of 75-95%; the sealed sputum collector is stored and transferred at the environment temperature of 4-30 DEG C; the transferred viscous sample mixed solution is directly fed into a neutral desorption electrospray extraction ionization ion source, the viscous sample mixed solution is atomized into neutral aerosol plume, the neutral aerosol plume and the charged electrospray extraction plume are subjected to cross collision in space, and molecules in the sample are directly desorbed and ionized under normal pressure; the method comprises the following steps: acquiring a mass spectrum fingerprint spectrogram of a sputum sample through mass spectrum detection, inputting the mass spectrum fingerprint spectrogram into a database, and classifying and distinguishing the mass spectrum fingerprint spectrogram by utilizing a preset mathematical model. The method is simple in process, low in cost and easy to standardize.

The invention discloses photocatalyst fluorescent ink, and relates to the technical field of ink. According to the invention, the self-made fluorescent agent is frozen into microspheres, and titanium dioxide is adsorbed on the surface of the self-made fluorescent agent by using plasma, electrostatic spraying and microwaves, so that the stability of the ink is improved; then, through low-temperature plasma assisted radio frequency magnetron sputtering, cerium oxide is coordinated and chelated on the surfaces of the titanium dioxide microspheres, so that the visible light activity of titanium dioxide is improved, and ink can be catalytically degraded under visible light; wherein the self-made fluorescent agent is prepared from veratrone, pyrenecarboxaldehyde and boron trifluoride, so that the ink can display patterns only under infrared wavelength irradiation, is not easy to decompose by illumination under long-time infrared irradiation, and has better light stability. The photocatalyst fluorescent ink prepared by the invention has the effects of good confidentiality, light stability and degradability.

The invention relates to the technical field of aquaculture, in particular to a preparation method of a phage compound preparation of Chinese softshell turtles. The method comprises the following steps: S1, respectively separating bacillus cereus, vibrio parahaemolyticus and aeromonas hydrophila from soft-shelled turtle bodies suffering from head shaking disease, nail rot disease and hemorrhagic disease, and mixing to prepare a multi-host bacterial suspension, mixing the multi-host bacterium suspension with an environmental bacteriophage sample, performing enrichment induction, screening out a target bacteriophage, and performing purification culture to obtain a bacteriophage proliferation solution; s2, purifying the bacteriophage proliferation liquid to remove endotoxin to obtain a high-purity bacteriophage solution; and S3, preparing the high-purity bacteriophage liquid and the embedding material into the micro-capsule oral preparation through an electrostatic spraying device. The preparation method comprises the following steps: directionally screening high-cracking bacteriophages aiming at main pathogenic bacteria of soft-shelled turtles, constructing a bacteriophage combination, preparing a targeted microcapsule preparation by combining an electrostatic spraying technology through a constructed composite embedding structure, and cooperating with a bacteriophage synergist, so that spectral antibiosis can be realized, and the stability of the preparation is improved.

The invention relates to the technical field of electrostatic spraying equipment, and discloses an anti-creeping insulation spraying rod for electrostatic spraying and a spraying system.The anti-creeping insulation spraying rod for electrostatic spraying comprises an insulation spraying rod body, a high-voltage cable sealing protection module and an insulation connection adaptation module, and the high-voltage cable sealing protection module is arranged in the insulation spraying rod body; the insulation connection adaptive module is arranged at the end part of the insulation spray rod body; an all-dimensional anti-creeping barrier is constructed through targeted structural design, a complete physical anti-creeping system is formed from a composite insulation framework of the spray boom body to multiple sealing protection of a high-voltage cable to insulation connection design between components, and various electric leakage paths in a high-voltage electrostatic spraying scene are effectively blocked; through the optimization of the structural level, the risk of electric leakage is avoided from the source, the problems that a traditional spraying rod is insufficient in insulation performance, ineffective in sealing and the like are solved, reliable safety guarantee is provided for high-voltage electrostatic spraying operation, and the safety of operators and equipment is ensured.

The invention discloses a derivatization technology-based liquid chromatography-mass spectrometry quantitative analysis method for monosaccharide and disaccharide, which comprises the following steps: by adopting a 2-hydrazino-1, 3-benzothiazole derivatization reagent, carrying out efficient derivatization reaction on hydrazino in a structure and aldehyde or keto carbonyl in a saccharide structure to generate a hydrazone derivatization product containing a benzothiazole structural unit, and carrying out high-efficiency derivatization reaction on the hydrazone derivatization product containing the benzothiazole structural unit to obtain the monosaccharide and disaccharide derivative. The derivatization product is easy to ionize in an electrospray positive ion mode, so that the mass spectrum signal response is remarkably enhanced, and meanwhile, the retention and separation efficiency of monosaccharide or disaccharide on a conventional C18 reversed-phase chromatographic column can be effectively improved by introducing a benzothiazole hydrophobic structure unit in the derivatization product; the reaction liquid of the derivatization reaction can be directly subjected to liquid chromatography-mass spectrometry detection, an additional purification or desalting step is not needed, all target components can be sequentially separated and generate chromatographic signals with high resolution and symmetrical peak patterns, the sensitivity and the specificity are improved, and the quantitative analysis process is simplified.

The application relates to an ion source (00) for high-resolution mass spectrum imaging and a mass spectrum imaging system, the ion source (00) comprising a first carrier table (001), a second carrier table (002), an ionization electrode (003), a high-voltage power supply (004), a scanning probe (005), a micro flow pump (006) and a control device (007); the first carrier table (001) is provided with a first holder (011) for clamping a slide (110), and the tissue slice sample (220) on the front surface of the slide (110) clamped by the first holder (011) faces the sample inlet (330) of a mass spectrometer (33); the second carrier table (002) is provided with a second holder (012) for clamping the scanning probe (005), and the scanning probe (005) is connected with the micro flow pump (006) through a conduit (008); the ionization electrode (003) faces the sample inlet (330) of the mass spectrometer (33) and is located on the back surface of the slide (110) clamped by the first holder (011), and the ionization electrode (003) is electrically connected with the high-voltage power supply (004); and the control device (007) is electrically connected with the first carrier table (001), the second carrier table (002), the high-voltage power supply (004) and the micro flow pump (006) respectively. Thus, a picoliter droplet analytical electrospray ion source (00) with higher sensitivity and spatial resolution in mass spectrum imaging technology is realized.

The invention relates to a method suitable for detecting three aconitine in various compound traditional Chinese medicine preparations, which comprises the following steps: preparing a reference extract solution and a test solution, introducing a magnetic solid-phase extraction technology when the test solution is prepared, and accurately'capturing 'and separating target aconitine from a complex chemical component background; a multi-reaction monitoring mode of triple quadrupole mass spectrometry is adopted, and a Shim-pack Scept C18-120 chromatographic column is adopted as a chromatographic column; the column temperature is 40 DEG C; a mobile phase is 0.14% formic acid aqueous solution (A)-acetonitrile (B), gradient elution is carried out for 0-5 min, 95% A > 5% A; the flow rate is 0.3 mL * min <-1 >; the sample size is 1 microliter; a mass spectrum ion source is an electrospray ionization source, a positive ion multi-reaction monitoring mode is adopted, the capillary voltage is 3.5 kV, the ion source temperature is 150 DEG C, and the solvent removal temperature is 500 DEG C. The high-efficiency purification of MCX and the high-specificity detection of LC-MS / MS are combined to form a set of powerful method system, the method system is successfully applied to various dosage forms with different formulas, and the industry dilemma of'one preparation and one method 'is solved.

The utility model relates to the technical field of packaging bottles, in particular to a spray packaging bottle which comprises an outer bottle body, an upper cover is in threaded connection with the top of the outer bottle body, a round spraying frame is in threaded connection with the inner side of the upper cover, and the input end of the round spraying frame penetrates into a mounting groove in the bottom of the outer bottle body. The top output end of the electrospray base is in threaded connection with the inner wall of the upper end of the mounting groove, the input end of the bottom of the electrospray base is in threaded connection with an atomization pipe, and the inner wall of the atomization pipe is fixedly connected with an ultrasonic atomization piece. And an inner bottle body. Therefore, through the design of the four groups of independent liquid storage cavities, various liquids can be contained, diversified use requirements are met, and the liquid storage device is suitable for being shared by multiple persons and free of cross contamination; quick and accurate switching of the liquid storage cavities is achieved by means of a centering column structure, and odor tainting and leakage are avoided by matching with dual sealing of a liquid prevention base and a plugging base; the ultrasonic atomization sheet and the micro centrifugal fan work cooperatively, mist spraying is fine, spraying is stable, a dustproof net and an observation structure are additionally arranged, use is convenient, and the device is clean and durable.

The application discloses a kind of core-shell structure manganese-based nano thermite and its preparation method, belong to energetic material technical field.The thermite is with micron aluminum powder as core, polyvinylidene fluoride and nanometer manganese oxide composite as shell layer, form dense spherical microstructure.Its preparation method includes: polyvinylidene fluoride is dissolved in solvent, micron aluminum powder and manganese oxide are added and are dispersed into precursor liquid by ultrasonic, by adjusting voltage, receiving distance and other parameters, using electrostatic spraying technology, core-shell structure microspheres are prepared by one-step method.The application effectively solves the agglomeration problem of nanometer manganese oxide using electrostatic spraying process, realizes the uniform coating of components in micron scale;Polyvinylidene fluoride shell layer serves as buffer and isolation layer, significantly reduces the mechanical sensitivity of material, greatly improves safety;At the same time, the structure effectively inhibits the micro-explosion and splashing phenomenon in the combustion process, realizes the stability, continuity and completeness of reaction.

The application provides application of capillary electrophoresis-mass spectrometry online connection, a detection method of tissue plasminogen activator drug heteromer, and relates to the technical field of analysis and detection.The application utilizes online capillary electrophoresis and mass spectrometry connection, separates t-PA through a capillary zone electrophoresis (CZE) mode, uses a neutral coating capillary, uses an acid-water mixed solution or an acid-acetonitrile-water mixed solution as an electrophoresis background buffer, adopts air pressure sampling, applies a separation voltage to perform capillary zone electrophoresis, effectively separates the heteromer in the t-PA drug through CZE, then introduces a mass spectrometer through an electric osmosis flow driven coaxial sheath flow liquid electrospray ion source for detection and analysis, realizes high-efficiency, accurate and high-sensitivity detection of the heteromer in the t-PA drug.Further, the capillary electrophoresis-mass spectrometry online connection detection adopted by the application is short in time consumption, small in required sample amount, and provides a reliable means for evaluating the quality and stability of the t-PA drug.

The application provides an electrospray needle, an ionization device and an analysis method, the electrospray needle is made of an organic polymer material, and the polymer material contains at least one of a hydroxyl group, a carboxyl group, a sulfonic acid group, an amino group and a halogen polar functional group. The electrospray ionization device comprises the electrospray needle, a three-way connector, an electrode, a sample tube, a gas tube and a sleeve; the three-way connector comprises a first interface, a second interface and a third interface, the electrode is connected to the first interface, the sample tube is connected to the second interface, and the tail end of the electrospray needle is connected to the third interface; sample solution in the electrospray needle forms an electrospray under the action of the electrode, the electrospray can be ionized to enter the inlet of a mass spectrometer; one end of the sleeve is provided with an end cover, the end cover is provided with a mounting hole coaxial with the sleeve, the electrospray needle is arranged in the mounting hole and the sleeve, and the inner diameter of the sleeve is greater than the maximum diameter of the electrospray needle; the end cover is provided with an air inlet, and the air inlet is connected to the gas tube.

The invention belongs to a mass spectrometry technology, and particularly provides a gas pressure control method and system for an electrospray ion source, and the method comprises the steps: A1, setting algorithm parameters, and randomly generating the position of a whale population; a2, decoding the positions of the individuals into M groups of PID parameters, applying the M groups of PID parameters to a PID controller, calculating the fitness value of each channel, and updating the optimal individual; a3, according to surrounding predation, bubble net attack or random search behaviors of the improved whale optimization algorithm; a4, the step A2 is repeated, inferior individuals are recognized according to the fitness values of all the channels, and the optimal individuals are updated; a5, repeating the steps A2-A4 until the maximum number of iterations is reached or a preset convergence condition is met; a6, decoding a plurality of groups of PID parameters from the position of the optimal individual, and outputting the PID parameters; and A7, loading the final optimized PID control parameters into a PID controller to realize closed-loop control of the gas pressure of each channel. The method has the advantages of accurate control and the like.

1. The name of the design product: lithium battery charging sprayer. 2. The use of the design product: for spraying liquid. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view.