15 results about "Atomic emission spectroscopy" patented technology

The invention provides a heterogeneous material laser-induced breakdown spectroscopy detection method and system, and relates to the technical field of atomic emission spectrometry detection, and the method comprises the following steps: ablating a plurality of positions of a heterogeneous solid material sample by using pulse laser, and collecting a monopulse plasma emission spectrum; classifying the spectrums into hit spectrums and missed spectrums according to the comparison relationship between the signal intensity of the characteristic spectral line of the target element and background noise; calculating the characteristic intensity of the hit spectrum and the sampling frequency of the laser ablation on the target element; and according to the hit characteristic intensity and the sampling frequency, calculating the concentration of the target element by using a pre-established quantitative relation model representing the linear relation between the product of the hit characteristic intensity and the sampling frequency and the concentration of the target element. The method can effectively solve the problems of poor signal-to-noise ratio and low sensitivity of a traditional overall average analysis method caused by laser pulse discrete sampling of the heterogeneous material, and improves the detection performance of trace elements in the heterogeneous material.

This invention relates to a hydride generation gaseous sample introduction method and apparatus for heavy metal element determination in conjunction with a liquid cathode glow discharge-atomic emission spectrometer, belonging to the field of atomic spectroscopy metal element analysis technology. This invention uses chemically generated carbon dioxide gas as a carrier gas, which is then used as the atmosphere gas in the liquid cathode glow discharge to ionize and generate micro-plasma. The chemical hydride generation method converts the applicable analyte element into a hydride, which is then carried into the micro-plasma by the carbon dioxide carrier gas, atomized, and excited to generate an emission spectrum.

The application provides an intelligent screening and conveying integrated system for a rare earth ore dressing process, which collects image features, near-infrared spectral features and spectral data of a rare earth ore stream; determines a mineral region and a particle size distribution according to the image features, the near-infrared spectral features and the spectral data, determines a screening parameter combination and adjusts a screening device to preliminarily screen mineral particles; scans and excites the screened rare earth ore stream; performs splicing and fusion based on atomic emission spectroscopy and near-infrared spectral features to obtain a bimodal feature vector of the rare earth ore stream, performs attention optimization identification on the modal feature vector, and then obtains a sorting decision signal; and adjusts parameters of a pneumatic sorting machine according to the sorting decision signal, so as to re-sort the rare earth ore stream. The scheme of the application can accurately identify the characteristics of rare earth minerals and perform efficient intelligent screening and conveying of rare earth ore dressing.

An object of the present disclosure is to provide a noble metal vapor deposition material for use in a vacuum vapor deposition method capable of suppressing the occurrence of the bumping phenomenon during vacuum vapor deposition. Provided is a vapor deposition material composed of a noble metal, wherein, when a surface area of 50 μm×50 μm of the vapor deposition material is analyzed using energy dispersive X-ray spectroscopy, Fe is less than 10 wt %, and when analysis is performed using ICP atomic emission spectroscopy, Fe is 10 wtppm or less.

Inductively coupled plasma (ICP) analyzers use an ICP torch to generate plasma in which the sample is atomized and ionized. Analysis of the atomic ions can be performed using atomic analysis, such as mass spectrometry (MS) or atomic emission spectrometry (AES). Particle-based ICP analysis involves analyzing particles (e.g., cells, magnetic beads, or laser ablation plumes) by atomizing and ionizing them in an ICP torch chamber followed by atomic analysis. In mass cytometry, the mass tags of the particles are analyzed using mass spectrometry, such as ICP-MS. The systems and methods of this application include one or more of the following: a removable ICP torch holder assembly, an external ignition device, an ICP induction coil including annular fins, a particle-suspended sample introduction jet, and its ICP analyzer.

The present application belongs to the technical field of atomic emission spectrum measurement, and particularly relates to a method for enhancing laser-induced breakdown spectroscopy signal. The present application unexpectedly finds that the introduction of chloride ions into the research work of NELIBS further improves the signal intensity and sensitivity of NELIBS. Moreover, compared with the existing NELIBS, the method of the present application enhances the signal intensity of NELIBS by more than 2 times; at the same time, compared with the optical path technical improvement, the method of the present application is low in cost, simple and convenient to operate, and is more suitable for analysis and detection in actual work.

The invention discloses a 3D printing pump-free sample injection point discharge atomic emission spectrum analysis device and method for detecting arsenic, and belongs to the technical field of atomic emission spectrum analysis. Comprising a 3D printing integrated device, an external gas path system and a spectrum detection system, the 3D printing integrated device comprises a 3D printing module, a quartz glass sheet, a quartz capillary tube, two tungsten filament electrodes and a microsyringe; the external gas path system comprises a small argon steel cylinder, two argon pipelines, a gas flow meter and a trace gas flow meter; the spectrum detection system comprises an optical fiber and a small CCD spectrometer. The method comprises the following steps: injecting an arsenic-containing solution sample into a reaction chamber of a 3D printing device by using a microsyringe, converting the arsenic-containing solution sample into a gaseous analyte through hydride generation, blowing the gaseous analyte into a discharge chamber by argon, exciting an atomic emission spectrum of arsenic by using micro plasma, radially collecting a spectral signal from the outside of a quartz capillary by using a bare optical fiber, and transmitting the spectral signal to a CCD (Charge Coupled Device); and finally, the concentration of the arsenic in the sample can be obtained through calculation. The method has the characteristics of high excitation efficiency, strong anti-interference capability, low cost, open source sharing, environmental friendliness and the like.

The invention provides a preparation method of a laboratory blocky internal control sample, and belongs to the field of metallurgical analysis chemical element detection, and the preparation method comprises the following steps: (1) selecting blanks produced in the same furnace or continuously, and ensuring that the components of the blanks are consistent with those of a to-be-detected sample; (2) performing cutting, surface grinding and numbering on the blank to prepare a final test unit; (3) adopting a spark atomic emission spectrometer, combining ISO and ASTM standards, and carrying out in-unit and inter-unit uniformity inspection on the test unit; (4) based on the drift correction data of the monitored sample, determining the sample uniformity by using a variance analysis model of ISO and ASTM; and (5) taking scraps from the samples which are qualified in uniformity inspection, and performing element valuing by adopting at least two independent analysis technologies. The method is suitable for preparing the iRM conforming to the ISO and ASTM authentication system requirements at the same time at one time by using the least raw materials when the material chemical analysis standard substance is lacked, and guarantees the quality control standard of material production enterprises.

An object of the present disclosure is to provide a noble metal vapor deposition material for use in a vacuum vapor deposition method capable of suppressing the occurrence of the bumping phenomenon during vacuum vapor deposition. Provided is a vapor deposition material composed of a noble metal, wherein, when a surface area of 50 μm×50 μm of the vapor deposition material is analyzed using energy dispersive X-ray spectroscopy, Fe is less than 10 wt %, and when analysis is performed using ICP atomic emission spectroscopy, Fe is 10 wtppm or less.

The invention provides an intelligent screening and conveying integrated system for a rare earth ore beneficiation process. The intelligent screening and conveying integrated system is characterized in that image features, near-infrared spectrum features and ray fluorescence spectrum data of rare earth ore flow are collected; determining a mineral area and particle size distribution according to the image features, the near infrared spectrum features and the spectrum data, determining a screening parameter combination, and adjusting screening equipment to preliminarily screen mineral particles; performing scanning excitation on the screened rare earth ore flow; carrying out splicing fusion on the basis of atomic emission spectrum and near infrared spectrum features to obtain a bimodal feature vector of the rare earth ore flow, and carrying out attention optimization identification on the modal feature vector to obtain a sorting decision signal; and parameters of the pneumatic sorting machine are regulated and controlled according to the sorting decision signal, so that the rare earth ore flow is sorted again. By the adoption of the scheme, the characteristics of the rare earth minerals can be accurately recognized, and intelligent screening and conveying of efficient rare earth mineral separation are executed.

An object of the present disclosure is to provide a noble metal vapor deposition material for use in a vacuum vapor deposition method capable of suppressing the occurrence of the bumping phenomenon during vacuum vapor deposition. Provided is a vapor deposition material composed of a noble metal, wherein, when a surface area of 50 μm×50 μm of the vapor deposition material is analyzed using energy dispersive X-ray spectroscopy, Fe is less than 10 wt %, and when analysis is performed using ICP atomic emission spectroscopy, Fe is 10 wtppm or less.

The invention discloses a separation, purification and source preparation method for analyzing radioactive silver in fission products, belongs to the technical field of radiochemical separation, and solves the technical problems that the Ag separation, purification and source preparation operation is complicated, and other metal ions are introduced. The separation and purification method comprises the following steps: preparing a fission product solution, adding an Ag ion solution, adding hydrochloric acid, collecting precipitated AgCl, washing the AgCl, and preparing a silver ammonia solution. The source preparation method comprises the steps of separation and purification, Ag elementary substance extraction, Ag washing and dissolution. The method is used for quantitatively analyzing the radioactive silver in the fission product in a gamma measurement and mass spectrum or atomic emission spectrum mode.

An object of the present disclosure is to provide a noble metal vapor deposition material for use in a vacuum vapor deposition method capable of suppressing the occurrence of the bumping phenomenon during vacuum vapor deposition. Provided is a vapor deposition material composed of a noble metal, wherein, when a surface area of 50 μm×50 μm of the vapor deposition material is analyzed using energy dispersive X-ray spectroscopy, Fe is less than 10 wt %, and when analysis is performed using ICP atomic emission spectroscopy, Fe is 10 wtppm or less.

The invention discloses a uranium oxide molten salt electrolytic reduction and molten salt spectrum online analysis method and device based on a micro-plasma anode array. The device comprises a micro-plasma anode array, a high-voltage direct-current power supply, a gas control system and a spectrum collection device. According to the method, the micro-plasma array is creatively used as an electrolytic anode and a spectrum excitation source at the same time, the atomic emission spectrum of the molten salt can be excited and collected in situ while efficient electrolytic reduction of uranium oxide such as uranium dioxide is achieved to prepare metal uranium, and therefore element components such as cesium in the molten salt can be monitored online in real time. The device solves the industrial problems that a traditional anode is easy to corrode and fused salt components are difficult to analyze in situ, has the advantages of being high in corrosion resistance, good in stability, dual-purpose and sensitive and efficient in analysis, and has wide application prospects in the field of nuclear fuel dry post-treatment.

The application belongs to the field of atomic emission spectrum analysis equipment and analysis technology, and particularly relates to a three-dimensional network fiber cluster micro-plasma excitation source and a spectrum detection device and method. The excitation source comprises a fiber tip discharge cluster working electrode and a counter electrode. The fiber tip discharge cluster working electrode and the counter electrode are horizontally arranged opposite to each other and a preset discharge gap is kept in the middle. The fiber tip discharge cluster working electrode and the counter electrode are electrically connected with the positive pole and the negative pole of a high-voltage direct current power supply respectively to form a discharge loop. The fiber tip discharge cluster working electrode comprises a fiber cluster conductor and an insulating support tube. The fiber cluster conductor is assembled in a strip or columnar form in the inner cavity of the insulating support tube. The fiber cluster conductor is a carbon felt strip. The three-dimensional isotropic random interweaving characteristics of the carbon felt fiber are utilized to construct a high-density micro-discharge site in a millimeter-level limited space. The field intensity interference between parallel fibers is effectively broken, and a cluster-shaped micro-plasma with high energy density is induced at a lower direct current voltage.