16 results about "Thermal ionization" patented technology

The utility model discloses a Faraday cup of an ion receiver of a thermal ionization mass spectrometer, which comprises a non-metal receiving support, a non-metal receiving electrode and a pair of external fixing metal plates, the non-metal receiving support is concaved inwards to form a notch communicated with the outside, the non-metal receiving electrode is arranged in the notch, and the external fixing metal plates are fixed on the non-metal receiving support. The pair of external fixing metal plates are oppositely fixed on the two side surfaces of the non-metal receiving bracket, and the external fixing metal plates and the non-metal receiving bracket are encircled to enable the notch to only have a state that the top is communicated with the outside, so that the whole Faraday cup retains the rigidity of metal, the outside is not easy to deform, and the service life of the Faraday cup is prolonged. The non-metallic material is adopted in the device, so that the device has the characteristic of not rebounding ions, interference on ion measurement can be effectively reduced, and the measurement accuracy is improved.

This invention provides an application of ion emitters based on covalent organic framework materials in thermal ionization mass spectrometry (TIEMS), specifically for improving the ionization efficiency of uranium during TIEMS measurements. Compared to conventional dual-band source modes in TIEMS, and ionization enhancement techniques such as graphite methods, benzene vapor carburizing methods, and graphene oxide methods, this invention significantly improves uranium ionization efficiency, facilitating the accurate measurement of ultra-trace and low-abundance uranium isotopes.

The invention discloses an intelligent regulation and control system for heat separation synergistic targeted transdermal drug delivery, and relates to the technical field of crossing of modernization of traditional Chinese medicine and intelligent medical equipment. The driving module is integrated in the application unit, the pressure unit generates periodic pressure changes, the temperature control unit is used for heating liquid medicine, and the electric field unit is used for establishing an electric field in a medicine cavity. The intelligent control box is used for receiving signals of the sensor and controlling the pressure unit, the temperature control unit and the electric field unit to cooperatively work in stages, and through the progressive force-heat-ionization triple synergistic effect, the defects that in the prior art, the infiltration promotion means is single, and the synergism is insufficient are effectively overcome; the medicine permeation efficiency and depth are obviously improved; by means of the multi-electrode system capable of being independently regulated and controlled, dynamic directional gathering and long-acting maintaining of the medicine in a subcutaneous focus area are achieved, and the problems that a traditional method is poor in targeting performance and fast in medicine dispersion are solved.

The application discloses a high-salt food heavy metal detection equipment and a detection method, and applies a dissolution voltammetry method for measurement, and comprises an outer casing, an electrode cover and a stirring device, wherein a thermal ionization chamber is preinstalled with an electrolyte, the bottom of the outer casing is provided with the thermal ionization chamber, one end of the thermal ionization chamber is communicated with an air inlet channel, the air inlet channel is installed with a hot air blower, the hot air blower blows hot air into the thermal ionization chamber to accelerate sample decomposition ionization. The middle part of the outer casing is provided with a partition, the partition is provided with the stirring device above and the thermal ionization chamber below, and the inner wall of the thermal ionization chamber is provided with a heat preservation layer to reduce heat loss. In use, the other end of the thermal ionization chamber is provided with an air outlet channel and a butterfly valve, when the sample enters the thermal ionization chamber, the hot air blower blows hot air to accelerate sample decomposition ionization, and after the sample is completely decomposed, the butterfly valve is closed to make the sample solution enter a rotating container.

The utility model discloses a rapid wiring mechanism for an ion source electrode of a thermal ionization mass spectrometer, which comprises a ceramic fixing frame, an electrode holder and a connecting bolt, the ceramic fixing frame is provided with a connecting part and an electrode holder mounting part, the electrode holder mounting part extends to form a mistake-proof bump, and the electrode holder mounting part is provided with a first connecting screw hole; the electrode holder comprises an electrode holder body and a plurality of probes, the plurality of probes are vertically fixed on the electrode holder body at intervals, the electrode holder body is provided with a groove matched with the mistake-proof bump and a second connecting screw hole matched with the first connecting screw hole, and the connecting bolt detachably penetrates through the first connecting screw hole and the second connecting screw hole; according to the utility model, the ceramic fixing frame and the electrode holder are ensured to have only one installation direction by utilizing the matching of the error-proof convex block and the groove and the matching of the first connecting screw hole and the second connecting screw hole, so that the possibility of installation errors of the ceramic fixing frame and the electrode holder is avoided, and the installation process is simplified.

The utility model discloses a cesium vapor thermal ionization ware, it includes: the shell of cylindrical shape, the middle part of shell is provided with cylindrical negative ion beam flow channel, and the top and bottom of shell are provided with spherical focusing surface and first annular groove respectively, and the side of shell is provided with the through -hole of intercommunication with first annular groove, resistance wire of spring shape, resistance wire is arranged in first annular groove, and both ends of resistance wire all lead out from through -hole, insulating ring, insulating ring sets up in first annular groove, and the top of insulating ring is provided with the second annular groove for containing resistance wire, and the outer edge of second annular groove is provided with the avoidance opening for avoiding both ends of resistance wire, insulating heat -conducting gasket, and insulating heat -conducting gasket is located in the top of insulating ring and is located in first annular groove, the scheme replaces the conventional complex technology that resistance wire and non - heat - conducting alumina are encapsulated respectively in the form of ointment, and then roasting, reduces production cost and production time.

This invention discloses an ultrasonic atomization and flame-assisted thermal ionization method. The method uses the port of the mass spectrometer injection channel, heated by a flame, as the ion source. The sample solution in the sample container is atomized using an ultrasonic atomization device, and the atomized sample moves to the port of the mass spectrometer injection channel for ionization. The thermal ionization method provided by this invention has advantages such as low cost, ease of implementation, wide applicability to various solvents, ability to analyze both polar and non-polar compounds, and the ability to analyze samples at the milliliter level.

The present application relates to the technical field of single crystal impurity detection, and specifically discloses a detection method for shallow energy level impurities of ultrahigh-purity germanium single crystal. After pretreatment of a germanium single crystal sample, photoetching, electron beam evaporation, annealing treatment and ohmic contact treatment are sequentially performed to obtain a sample to be detected, the sample to be detected is placed into a photo thermal ionization spectrometer, photo thermal ionization spectrum of the sample to be detected is obtained, and the impurity type and concentration of shallow energy level impurities of the ultrahigh-purity germanium single crystal are obtained by comparing the spectral line position and intensity of the elements. In the present application, a metal indium film is grown on the upper surface of the germanium single crystal, and the germanium single crystal can detect shallow energy level impurities in the photo thermal ionization spectrometer without adding conductive substances to the lower surface. Meanwhile, the present application uses an acid washing solution with high nitric acid content to perform acid washing treatment on the germanium single crystal, so that the germanium single crystal after acid washing can be tightly combined with the indium film evaporated by the electron beam, and the sample with the indium film loaded on the upper surface prepared has good ohmic contact characteristics.

The utility model provides a sample filament degassing device suitable for a thermal ionization mass spectrometer, and relates to the technical field of filament degassing, the sample filament degassing device comprises an electric heating body, the surface of the electric heating body is sleeved with a detachable filament support, the filament support is internally provided with sixty degassing grooves for accommodating sample filaments, and the degassing grooves are communicated with the electric heating body. Sealing plates for sealing the degassing tank are arranged at the two ends of the degassing tank. The utility model has the advantages that the lamp filament bracket which can be disassembled and assembled is arranged in the vacuum cavity, the sixty degassing grooves for accommodating sample lamp filaments are formed in the lamp filament bracket, and meanwhile, the clamping plate and the electric heating body which can be telescopically adjusted are arranged for fixing and heating the lamp filament bracket; the positions of the clamping plates can be adjusted according to requirements so that the lamp filament support can be conveniently disassembled and assembled, sixty sample lamp filaments can be degassed at a time through the degassing groove, large-batch sample lamp filaments can be degassed conveniently, the working efficiency is improved, and use of the lamp filament degassing device is facilitated.

The utility model relates to the field of mass spectrometry, and discloses a program-controlled sample application device for ion source samples of a thermal ionization mass spectrometer, which comprises a controller, a plurality of air inlets are arranged on the right side of the controller, cleaning components are arranged on the right sides of the air inlets, and the cleaning components are used for preventing the air inlets from being blocked by dust. The rear side of the controller is provided with a wire, the other end of the wire is provided with a program-controlled sample application machine, the top of the program-controlled sample application machine is provided with a plurality of jacks, the interior of each jack is slidably connected with a lamp filament, and the outer sides of two of the lamp filaments are provided with mounting pieces. Two limiting plates are fixedly connected to the top of the program control sample application machine and located below the mounting piece. According to the utility model, the push rod is loosened, the moving block is pushed to reset under the action of the spring, and then the connecting rod is driven to rotate to reset the push rod and the push plate, thereby driving the clamping plate to clamp the filament again, avoiding the problem of lack of stability when the filament is directly inserted, and improving the practicability of the device.

The present invention relates to the technical field of nuclear reactor design, and specifically to a gas-cooled nuclear reactor system with series thermal ionization magnetofluid power generation. The system comprises: a reactor core, including a fuel grid, wherein the fuel grid is formed by a plurality of grid unit plates intersecting horizontally and vertically; each of the grid unit plates is a thin plate of fuel; a thermal ionization magnetofluid power generation element, arranged outside the reactor core, for providing a magnetic field to the fuel grid; and a cooling system, for providing a rare gas to the reactor core, configured so that the rare gas exchanges heat with the fuel grid and is converted into a conductive fluid in the generated magnetic field. The conductive fluid flows in the generated magnetic field, generating an induced electromotive force to achieve thermoelectric conversion. While ensuring high thermoelectric conversion efficiency, the present invention improves the engineering feasibility of the gas-cooled nuclear reactor system and solves the problems of gaseous nuclear fuel being prone to corrosion of structural materials, prone to leakage, and difficult post-processing.

The present invention belongs to the field of geological dating, and specifically relates to an improved method for determining the U-Pb age of micron-scale sphene. The present invention confirms the matrix effect related to the Fe2O3 content in sphene dating; and after extensive testing, it is found that the TIMS (thermal ionization mass spectrometer) and SIMS (secondary ion mass spectrometry (SIMS)) test results of sphene standard samples are similar. 206 Pb / 238 The U ratio is strongly correlated with the Fe2O3 mass fraction. Based on this, a direct calibration method for unknown samples was established. 206 Pb / 238 Simplified method of U ratio and correction using similar principles 207 Pb / 235 The deviation between the corrected sphene age and the reference age was reduced from 12.3% to 0.4%, indicating that the corrected age result is more accurate. This method can accurately obtain natural sphene with Fe2O3 content between 0.019% and 38.31%, with the advantages of high accuracy and simple calibration process.

The utility model relates to the technical field of filament supporting, in particular to a sample filament supporting device suitable for a thermal ionization isotope mass spectrometer. The utility model has the advantages that: on one hand, the ceramic support plate has a structure support effect at high temperature and has good electrical insulation performance at high temperature; the power supply binding post and the filament fixing column which are made of metal materials have good conductive performance at high temperature and need to have good mechanical performance in a high-temperature environment, it is guaranteed that the structure of the filament supporting device is stable and does not deform, and both ceramic and metal have good high-temperature-resistant performance. In the analysis and test process of the thermal ionization isotope mass spectrometer, a single sample filament supporting device can repeatedly detect and analyze more than 30 samples, and the function is still normal; a single sample filament supporting device randomly equipped with an imported instrument generally can only detect and analyze 2-3 samples, and the product price of the lamp filament supporting device is about 30% of the price of an imported product.

The embodiment of the invention discloses a method for detecting Cr isotope in a low-content sample by thermal ionization mass spectrometry. The method comprises the following steps: digesting a sample to obtain a to-be-loaded solution; the method comprises the following steps: cleaning and balancing a quartz glass column filled with AG 50W-X12 resin, loading a sample while the quartz glass column is hot, sequentially adding 1N HCl and collecting, eluting matrix elements by the 1N HCl and the 1N HCl and collecting, and combining collected liquids to obtain a to-be-loaded liquid; the method comprises the following steps: cleaning and balancing a PP micro column filled with AG 50W-X12 resin, loading a sample, sequentially adding 1N HF and 1N HCl to elute matrix elements and 6N HCl, and collecting; single rhenium belt sample application is carried out, and a thermal ionization mass spectrometer is adopted for testing. A stable Cr isotope analysis process which is high in recovery rate, low in blank, high in resolution and few in separation step is established on a thermal ionization mass spectrometry (TIMS) platform, and the method has remarkable advantages in high-precision analysis of low-Cr samples and is suitable for high-precision Cr isotope separation and determination of low-Cr-content samples.

The utility model provides a burnout alarm signal isolation device for a surface thermal ionization ion source power source sample belt, and relates to the technical field of ion source power sources. The device comprises a detection circuit, an alarm circuit and an optical fiber. The detection circuit comprises a detection assembly and an infrared transmitting tube, the input end of the detection assembly is used for being connected with the sample belt interface, and the output end of the detection assembly is connected with the infrared transmitting tube; the alarm circuit comprises an infrared receiving tube and an alarm assembly, the infrared receiving tube is connected with the input end of the alarm assembly, and the output end of the alarm assembly is used for being connected with an upper computer; the two ends of the optical fiber are located in the light-emitting area of the infrared transmitting tube and the light-sensing area of the infrared receiving tube respectively. The abnormal condition is transmitted from the high-voltage side to the low-voltage side through the optical fiber, and the alarm circuit sends an alarm signal to the upper computer, so that the upper computer receives the signal of the low-voltage side, the upper computer cannot be damaged, and the upper computer can operate normally.

The application provides a design method of a surface thermal ionization mass spectrometer, comprising the following steps: initially designing an ion lens system structure and performing three-dimensional modeling, simulating ion focusing states of ion beams generated from an ion source and passing through the ion lens system, judging whether the transmission effect meets the design requirements, correcting the structure parameters if the transmission effect does not meet the design requirements, and re-simulating, and determining the structure of the ion lens system if the transmission effect meets the design requirements; initially designing an ion optical system structure and performing three-dimensional modeling, simulating flight deflection trajectories of ion beams with different masses from the ion lens system into the ion optical system when a set acceleration voltage is used, judging whether the focusing effect meets the design requirements, correcting the structure parameters if the focusing effect does not meet the design requirements, and re-simulating, and determining the structure of the ion optical system if the focusing effect meets the design requirements; and designing parameters of an ion receiver. The application provides a reliable theoretical basis for the design and development of the thermal ionization mass spectrometer.