66 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 relates to the field of printing system equipment, and discloses a piezoelectric spray valve which comprises a valve shell, a piezoelectric control assembly, a nozzle firing pin and a glue inlet module, the glue inlet module is fixedly arranged at the lower end of the valve shell, and a nozzle for spraying glue and a threaded sleeve for fixing the nozzle are arranged at the lower end of the glue inlet module. The piezoelectric control assembly is arranged in the valve shell and connected with a voltage control module, the voltage control module is provided with a lead connected with an external mechanism, one end of the nozzle firing pin is vertically arranged in the valve shell in a sliding mode and is in butt joint with the piezoelectric control assembly, and the position of the nozzle firing pin in the vertical direction is controlled by the piezoelectric control assembly. The other end of the nozzle firing pin extends into a glue inlet module at the lower end of the valve shell to control the amount of glue entering the nozzle, and a spraying range control structure is arranged at the lower end of the glue inlet module. Glue feeding amount and voltage change are automatically adjusted, spraying is regular and uniform, debugging time is saved, and the proficiency of operators is reduced.

The application discloses a kind of based on plasma atomization gas auxiliary electric spray ionization method, comprising the following steps: a) sample solution is introduced into electric spray needle;B) open plasma initiation device, make plasma initiation device discharge and generate plasma in plasma atomization gas gas path;C) atomization gas is introduced into plasma atomization gas gas path, and the atomization gas under the action of plasma forms plasma atomization gas;D) open high-voltage power supply, and sample solution is under the action of high-voltage electricity and plasma atomization gas and generates spray and forms sample ion, and the sample ion formed enters mass spectrometer by mass spectrometry inlet channel.This application can improve sensitivity, and under the premise that compound fragmentation dissociation does not occur, it is used for electric spray unfriendly solvent and difficult to detect low polarity compound detection, which can be compatible with normal phase liquid chromatography commonly used solvent, and can also reduce the influence of common complex matrix effect in electric spray ionization.

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 provides an in-situ MOF-modified stereocomposite polylactic acid (PLLA) micro / nanofiber self-powered filter membrane and its preparation method. The method comprises the following steps: ZIF-8 nanocrystals with uniform morphology and stable dimensions are prepared using a combination of microwave-assisted synthesis and template method. The ZIF-8 dispersion is then co-spun with a L-type polylactic acid (PLLA) / D-type polylactic acid (PDLA) blend solution using a combination of electrospraying and electrospinning to prepare the in-situ MOF-modified stereocomposite polylactic acid (PLLA) micro / nanofiber self-powered filter membrane. The prepared in-situ MOF-modified stereocomposite polylactic acid (PLLA) micro / nanofiber self-powered filter membrane exhibits controllable bead and mesoporous morphology, as well as the high specific surface area and surface activity imparted by ZIF-8, resulting in high filtration performance, excellent triboelectric output performance, and good self-cleaning ability. It has broad application prospects in the fields of personal protective equipment and intelligent monitoring.

The application discloses a nanoliter spray ionization mass spectrometry interface device, an analytical instrument and an ionization method, and belongs to the technical field of electrospray mass spectrometry ionization devices. The nanoliter spray ionization mass spectrometry interface device comprises an ion guide tube, a first electrode and a second electrode; the inner wall of the ion guide tube is plated with a conductive film; the ion guide tube has an ion transmission channel in the form of a funnel along the length direction of the tube; the ion transmission channel has a first end and a second end; the diameter of the ion transmission channel gradually decreases from the first end to the second end; the first electrode is connected to the end of the first end; and the second electrode is connected to the end of the second end. The device has a simple structure and is convenient to operate; high stability, high sample utilization and high ion transmission efficiency of the electrospray process under a nanoliter flow rate can be realized; positive and negative switching can be directly and rapidly performed under the condition of normal pressure and opening; and problems, such as unstable spraying caused by bad high pressure and complex parameter optimization process, are avoided.

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.

This invention discloses a method for preparing single-pore hollow silicon spheres. Using positively charged polystyrene spheres as templates, the method employs electrostatic spray granulation to coat the polystyrene surface with a layer of silica sol. The core is then removed by calcination, resulting in hollow silicon spheres. Because the polystyrene spheres are positively charged, during electrostatic spray granulation, the silicon shell is repelled to one side by a positive electric field of the same charge. Finally, calcination yields single-pore hollow silicon spheres. These spheres can effectively carry functional substances such as fragrances, drugs, and catalysts into their internal space for sustained release, while maintaining good structural strength, thus showing promising practical applications. Furthermore, the preparation method of this invention is simple, allows for mass production, and is beneficial for industrial production and application.

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 utility model relates to a desolvation transmission-type desorption electrospray low-pressure ion mobility spectrometry, which comprises a transmission-type desorption electrospray ion source, an interface electrode and a low-pressure ion migration tube, the transmission-type desorption electrospray ion source is connected with the low-pressure ion migration tube through the interface electrode, the ion mobility spectrometry can realize high-efficiency desorption electrospray ionization of substances difficult to volatilize in the detection process, the sample detection process is simplified, the working pressure is lower than the atmospheric pressure, the detection sensitivity can be improved, and further, the detection accuracy is improved. The ion mobility spectrometry is provided with the desolvation area and is combined with the desolvation gas, so that the detection sensitivity can be further improved, and the application scene of IMS field detection is expanded.

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 discloses an aromatic ester compound detection device based on a mass spectrum ion source and application. The detection device comprises an electrospray assembly and a low-temperature plasma beam assembly, the front end of a metal capillary in the electrospray assembly extends out of a main pipe of an insulating medium pipe by 4-12 cm, and an outer electrode in the low-temperature plasma beam assembly is 5-13 mm away from an outlet of the main pipe of the insulating medium pipe; an included angle between the low-temperature plasma beam assembly and the horizontal reference plane is 120-160 degrees, and an included angle between the low-temperature plasma beam assembly and the electrospray assembly is 45-90 degrees, so that the electro-liquid drop spray generated by the electrospray assembly is formed under the synergistic effect of the low-temperature plasma beam generated by the low-temperature plasma beam assembly; therefore, the plasma beam can better hit the surface of the sample, and ions can be effectively released from liquid drops. Therefore, the detection device can improve the detection sensitivity of the aromatic ester compounds, can be applied to rapid detection of food, traditional Chinese medicinal materials and Baijiu adulteration, and has the advantages of high automation and low price.

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 method for detecting saponin components in ginseng and a preparation thereof. Relates to the field of medicinal material detection. The method for detecting the saponin components in the ginseng and the ginseng preparation comprises the following steps: S1, taking a ginseng sample or a ginseng-containing preparation, adding an extraction solvent, and extracting to obtain a test solution; s2, the test solution is injected into a liquid chromatograph, a chromatographic column is adopted for gradient elution, and octadecylsilane chemically bonded silica is adopted as a filling agent of the chromatographic column; s3, detecting pseudo-ginsenoside F11, ginsenoside Rf, ginsenoside Rg1, ginsenoside Rb1 and ginsenoside Re by adopting an electrospray ionization source negative ion mode and a multi-reaction monitoring mode of a mass spectrometry detector; a mobile phase used for gradient elution is selected from acetonitrile-water, an acetonitrile-ammonium acetate solution, acetonitrile-ammonium formate, methanol-formic acid or an acetonitrile-tetrahydrofuran-ammonium formate solution. By combining C18 chromatographic column gradient elution with a mass spectrum multi-reaction monitoring (MRM) mode and providing a mobile phase system, the problems of narrow applicability, isomeride interference, strong matrix effect and the like of a method for detecting saponin components of ginseng and preparations thereof in the prior art are effectively solved.

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 storage and processing of agricultural products, in particular to a multi-factor synergistic effect method and system for controlling the content of solanine in potatoes, and the method comprises callus treatment, short-wave ultraviolet irradiation and electrostatic spraying of a composite inhibitor in a pretreatment stage, and dynamic regulation and control of temperature, humidity and gas components and ethylene intervention in a storage stage. The system integrates an environment sensor, an intelligent controller and an execution mechanism, and can monitor and feed back adjustment parameters in real time. Experiments show that the method can reduce the solanine content to 18 mg / kg or below, is significantly superior to the prior art, can maintain the quality of the potatoes and prolong the storage period to 12 months or above, and has important application value.

The invention relates to the technical field of drug detection, in particular to a method for detecting 30 control drugs in suspected drugs, which comprises the following steps: S1, extracting a sample to be detected by using an acetonitrile extraction solvent to obtain a solution to be detected; s2, carrying out qualitative and quantitative detection on the solution to be detected by adopting UPLC-MS / MS; chromatographic conditions are as follows: a chromatographic column is C18; the column temperature is 40 DEG C; a mobile phase A is a 0.1% formic acid aqueous solution, and a mobile phase B is acetonitrile; mass spectrum conditions are as follows: an ionization mode is an electrospray ionization source, positive and negative ion mode; a scanning mode: multi-reaction monitoring; the electrospray voltage is 5500 V; the temperature of an ion source is 550 DEG C; the pressure of atomization gas is 50 kPa; the pressure of the auxiliary gas is 50kPa; and the air pressure of the air curtain is 35kPa. The method provided by the invention is simple and accurate to operate and good in precision and stability, and can meet the rapid and accurate detection requirements of 30 controlled drugs in suspected drugs.