8 results about "Thermal ionization" patented technology

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 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 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.