48 results about "Fluorescence spectrometry" patented technology

This invention proposes an online quality detection method for An Shen Bu Nao Liquid based on multispectral fusion. Addressing the bottlenecks of traditional detection techniques, such as long offline processing time, weak multi-index detection capabilities, and poor dynamic adaptability, this method achieves intelligent quality control throughout the entire production process. The device integrates ultraviolet-visible spectroscopy, near-infrared spectroscopy, and fluorescence spectroscopy modules. It constructs a multi-scale residual convolutional network to extract ultraviolet-visible spectral features, uses a two-way LSTM to analyze the fluorescence excitation-emission matrix, and employs dynamic baseline correction of the ultraviolet spectrum. This improves the detection accuracy of icariin content by 40% compared to traditional HPLC methods, and achieves a heavy metal residue detection limit of 0.05 ppm, providing an innovative solution for the intelligent production of traditional Chinese medicine preparations.

This invention relates to a method, system, medium, and product for X-ray fluorescence spectrometry detection of bauxite, belonging to the field of bauxite detection technology. The method first acquires fluorescence spectral data and mining area environmental fingerprint data of the sample to be tested, and determines the initial concentration by background noise stripping. Then, a mineral phase interference network is constructed, and the interfacial radiation attenuation rate and secondary fluorescence excitation probability are calculated based on mineral phase characteristics to generate an interphase coupling interference matrix. Next, a stress field model is constructed based on environmental parameters, and the interference matrix is ​​corrected using the lattice distortion coefficient. The coexisting mineral phase combination is input into the environmental adaptive interference model to determine the nonlinear matrix effect deviation value. Finally, iterative compensation correction is performed until the difference between adjacent correction values ​​is less than a threshold, outputting accurate grade data of the target metal element. Implementing the technical solution provided in this application can improve the accuracy of X-ray fluorescence spectrometry detection of bauxite.

The invention relates to a method for the X-ray fluorescence analysis of an object to be analysed, which method comprises: - focusing an X-ray measurement beam (10) on or in the object to be analysed, the X-rays being suitable for exciting an emission of X-rays by the object to be analysed; - two-dimensionally scanning the measurement beam (10) over the object to be analysed at a plurality of measurement points on the object to be analysed; - two-dimensionally detecting, using X-ray fluorescence spectrometry means (3), the X-rays emitted by the object along a two-dimensional detection axis (13), at the plurality of measurement points; - identifying at least one measurement point of interest from among the plurality of measurement points; and - confocally detecting, using X-ray fluorescence spectrometry means (4), the X-rays emitted by the object at the at least one measurement point of interest in a measurement volume and along a confocal detection axis (12), the focusing means (5, 6) being configured to generate the measurement volume. The invention further relates to a portable device used by the method, the measurement volume being offset outwards relative to a periphery of the device.

The application discloses a chemical analysis method for detecting oxides in carbon-containing silicon carbide refractory materials by a non-chemical reagent oxidation method. First, raw materials are crushed, dried and cooled to obtain a treated sample; the silicon carbide content in the treated sample is detected; the treated sample is subjected to a calcination oxidation reaction, and is cooled after the reaction; the weight loss after calcination is calculated; the sample with a tested silicon carbide content of zero is weighed, mixed flux is added, and the sample is fused into a glass sheet; the glass sheet is analyzed and detected to obtain the actual content of the target oxide; finally, data correction is performed to obtain the content of each oxide in the raw materials. The method effectively solves the problems of the use of hazardous chemicals in traditional wet analysis and the environmental and safety problems caused by waste gas and waste liquid treatment, and solves the problem that the refractory materials containing silicon carbide cannot be detected in GB / T21114-2019 "Refractory Materials X-ray Fluorescence Spectrometric Chemical Analysis Fused Glass Sheet Method", so that the detection method is more green and environmentally friendly.

The invention provides a method for quantitatively identifying contribution of multi-source phosphorus pollution, relates to the field of water environment management, and aims to accurately analyze sources of multi-source phosphorus pollution of river and lake water bodies. The method comprises the following steps: firstly, determining the pollution source type of a research area, collecting river and lake water and pollution source water samples, synchronously retaining subsamples, determining the phosphorus form concentration, and establishing an associated ledger; then measuring a three-dimensional fluorescence EEM spectrum of a water sample, preprocessing the three-dimensional fluorescence EEM spectrum, extracting a fluorescence component by using a PARAFAC model, calculating a Fmax value, constructing fluorescence component-Fmax-phosphorus concentration associated data, optimizing a projection direction through an immune genetic algorithm, constructing a projection pursuit regression model, and supplementing phosphorus pollution associated characteristic values to form two-dimensional correction data; and finally, inputting correction data by using a MixSIAR model, operating MCMC to simulate and estimate a pollution source contribution proportion, verifying model convergence, and analyzing and visualizing sample point pollution contribution and spatial distribution characteristics. According to the method, the phosphorus pollution traceability accuracy and reliability are improved, a scientific basis is provided for water environment treatment, and drainage basin management and ecological civilization construction are assisted.

The invention relates to the technical field of combination of a testing machine and a fluorescence spectrometer, in particular to an in-situ mechanoluminescence combination interface for combination of the testing machine and the fluorescence spectrometer, and discloses an in-situ mechanoluminescence combination interface for combination of the testing machine and the fluorescence spectrometer, which is used for adjusting the distance, the angle and the relative height between the spectrum combination interface and a detected object by driving a fixed frame to move when a sliding block moves. The requirement for multi-angle accurate adjustment of the spectrum coupling interface is met, and manual pushing by workers is not needed. And the design of combined use of the matching groove and the fixing rod avoids angle and distance changes caused by mistaken touch in the use process. The spectrum coupling interface provided by the invention can be used for coupling an FLS980 steady-state transient fluorescence spectrometer and a tensile testing machine, the exciting light of the spectrometer is guided out by the optical fiber and excites a sample stretched on the testing machine through the spectrum coupling interface, and an emission signal can be guided into the spectrometer through the optical fiber in the stretching process and is detected by a spectrometer detector; therefore, optical parameters such as fluorescence spectrum and service life are obtained.

The application provides a method for identifying bases, drops a DNA solution on a molybdenum disulfide film to prepare a DNA testing device, uses a fluorescence spectrometer to detect fluorescence spectrum data of the molybdenum disulfide under the influence of bases, carries out characteristic matching degree comparison analysis based on the fluorescence spectrum curve of the molybdenum disulfide under the influence of unknown bases and the fluorescence spectrum curve of the molybdenum disulfide under the influence of known bases, and determines which kind of known base the unknown base is according to the matching degree comparison analysis result; the application can effectively identify bases by using the DNA and MoS2 adsorption and charge transfer mechanism, and has a lower requirement for the concentration of the used DNA solution to be tested; meanwhile, the MoS2 has the advantages of low cost and simple preparation, and compared with the prior art, the application has the advantages of low-concentration trace DNA base effective identification, simple device structure, simple operation and low cost.

The invention discloses a method for detecting the total silicon content in a sample, which comprises the following steps of: mixing the sample and a flux, putting the mixture into a lining crucible for pre-oxidizing and melting, thoroughly decomposing refractory matters in the sample and eliminating the reducibility of the refractory matters, melting the pre-oxidized sample to prepare a glass sheet, and measuring the total silicon content in the sample by using an X-ray fluorescence spectrometry. The method is short in time consumption, small in pollution, high in precision, accurate and reliable, can meet the requirements for accurate analysis and quality control of the total silicon content in the steelmaking reducing agent, and ensures that materials are efficiently and stably applied.

The invention belongs to the technical field of material component analysis, and particularly relates to a method for quantitatively detecting components of Al2O3.TiO2 spraying powder through an X-ray fluorescence spectrum. The method comprises the following steps: mixing powder standard substances of components SiO2, TiO2, Fe2O3 and Al2O3 to prepare standard mixed samples with different gradient contents, preparing a glass fuse piece, detecting by adopting an X-ray fluorescence spectrometry, and establishing a standard curve of the contents of the components and the fluorescence intensities by respectively taking the mass percentage contents of SiO2, TiO2 and Fe2O3 as horizontal coordinates and the fluorescence intensities corresponding to Si, Ti and Fe elements as vertical coordinates. And detecting the glass fuse piece of a to-be-detected actual sample, and respectively substituting the fluorescence intensity of the element into the standard curve corresponding to each component to obtain the content of each component in the actual sample. According to the method, the operation steps are simplified, the detection efficiency is improved, and a new analysis means is provided for component detection of the spraying powder.

The application provides a monovalent mercury detection method, and relates to the field of analytical detection technology. The monovalent mercury in a to-be-detected sample is extracted by 2-mercaptoethanol aqueous solution, and the obtained to-be-detected sample liquid is subjected to high performance liquid chromatography-atomic fluorescence spectrometry detection. In the high performance liquid chromatography separation process, the monovalent mercury is completely disproportionated into zero-valent mercury and divalent mercury, and is separated by high performance liquid chromatography, and is subjected to atomic fluorescence spectrometry detection respectively. The mercury of all valence states is reduced by a reducing agent and forms mercury vapor, and then generates a fluorescence signal, and sequentially peaks with a retention time, so that the zero-valent mercury detection peak area and the divalent mercury detection peak area are obtained. According to the zero-valent mercury detection peak area and the divalent mercury detection peak area, the detection concentration of divalent mercury and the detection concentration of zero-valent mercury are obtained by using an external standard method. The concentration of monovalent mercury in the to-be-detected sample liquid is calculated, the accuracy and the sensitivity of detection are high, and efficient analysis and detection of monovalent mercury are realized.

The application discloses a kind of planet laser spectroscopy acquisition device and method combined with remote ultraviolet Raman-fluorescence technology, and it is related to deep space exploration spectral measurement technical field.The device includes ultraviolet laser emission unit, beam expander unit, dichroic beam splitter, cassegrain telescope unit, signal separation and acquisition unit, Raman spectrometer, fluorescence spectrometer and computer control unit.Laser is projected to remote target by cassegrain telescope after beam expansion and dichroic beam splitter, and the Raman and fluorescence signals excited are received by the same telescope, then after filtering out Rayleigh scattering light, they are collected by optical fiber into corresponding spectrometer.The application can realize the integrated collection of ultraviolet Raman and fluorescence spectrum of remote, non-contact planetary surface material, and provide efficient optical detection means for mineral composition identification, organic matter and potential life marker detection.

One aspect of the invention relates to a method for determining at least one microstructural property of a metal alloy on a surface (20) of a part made of said metal alloy.

The invention relates to rock core oiliness evaluation equipment, an oiliness evaluation method and a storage medium, and relates to the technical field of oil exploration. The rock core oiliness evaluation equipment comprises a frame body; the conveying platform is installed on the frame body, and the conveying platform can drive the rock core sample borne above the conveying platform to move in the detection direction; a positioner; the detection device comprises a detection assembly arranged towards the preset scanning area, and the detection assembly comprises a laser emitter and a fluorescence detector; and the analysis system comprises a fluorescence spectrometer connected with the fluorescence detector. The core sample can be induced to generate fluorescence through laser emitted by the laser emitter, the intensity of the fluorescence is improved on the premise that the core is not damaged, the fluorescence generated by each section of the core sample can be continuously obtained by the fluorescence detector, and a continuous fluorescence spectrum can be generated through the fluorescence spectrometer connected with the fluorescence detector. Therefore, the oiliness analysis of each section of the rock core sample is realized.

This invention discloses a method for the segregation and quantitative characterization of banded structures. The method includes: preparing a cross-sectional sample of a plate; performing component distribution analysis on the cross-sectional sample using X-ray fluorescence spectrometry to obtain a characteristic element content distribution spectrum; based on the characteristic element content distribution spectrum, selecting characteristic elements with obvious banded segregation characteristics for linear distribution quantitative characterization to obtain a characteristic element content line distribution map; and quantitatively calculating the band parameters of the banded structure, wherein the band parameters include the spacing between two adjacent banded structures and the width of the banded structure. This invention uses X-ray fluorescence spectrometry to analyze the elemental composition distribution of the plate, quantitatively calculates the band parameters of the banded structure, simplifies sample preparation, eliminates the need for surface polishing or chemical treatment of the sample, and allows the observation field to cover the entire plate thickness.

1. The name of the design product: handheld X-ray fluorescence spectrometer. 2. The use of the design product: the design product is used for an instrument for detecting the composition and content of a substance by spectral measurement. 3. The design points of the design product: the combination of shape, pattern and color. 4. The picture or photo that best shows the design points: perspective view 1. 5. The design claimed contains color.

The invention provides a multi-element detection method and system for a precious metal analyzer based on a polarized X-ray fluorescence spectrum. The method comprises the following steps: firstly, operating a polarized X-ray fluorescence spectrum analyzer to generate a plurality of polarized X-ray beams, and secondly, focusing the plurality of polarized X-ray beams and irradiating the focused polarized X-ray beams on a noble metal sample to excite a plurality of noble metal elements; capturing a fluorescent X-ray signal emitted from the noble metal sample through a multi-dimensional detector array, generating a multi-element spectral response by using the fluorescent X-ray signal, and finally completing synchronous detection of various noble metal elements through the multi-element spectral response. According to the technical scheme provided by the invention, the multi-element detection efficiency is improved, and the accuracy and reliability of multi-element synchronous detection are greatly improved.

A method for calibrating fluorospectrometric measurements obtained on a spectrometric device is disclosed. Calibration methods of this disclosure utilizes non-fluorescent emissions of water, primarily Raman scattering signals of water, as a calibration reference. For aqueous samples containing minute amounts of fluorescent analytes, the spectrometric measurements of samples obtained will contain both fluorescent emission and non-fluorescent emission, including water Raman scattering. Calibration factors based on the water Raman peaks are provided. Spectra of samples may be compared to each other by calibrating the spectral readings against the calibration factors. Also disclosed are apparatus useful for performing the calibration methods, including lens array for enhancing the optics of spectrometric measurements and water Raman calibration methods, spectrometric devices configured to perform the calibration methods, and computer-readable medium encoding the calibration method.

The application discloses a fault diagnosis device and method based on transformer oil fluorescence multivariate correction analysis, belongs to the technical field of transformer fault diagnosis, and solves the problems of large device volume and weight, high cost and inconvenience in use caused by directly collecting the fluorescence spectrum of transformer oil by using a fluorescence spectrometer in the prior art; the optimal excitation wavelength monochromatic excitation light generated by a fluorescence excitation source is used to excite the transformer oil in a fluorescence excitation detection device to generate fluorescence; the fluorescence excitation detection device generates fluorescence according to the input monochromatic excitation light and inputs the fluorescence into a fluorescence signal collection and analysis device; the fluorescence collection and analysis device adopts a multivariate correction filter group to collect and analyze the fluorescence signal emitted by the transformer oil, replaces the emission monochromator component of the fluorescence spectrometer, reduces the equipment cost and the equipment volume, the data processing is fast, the performance-price ratio of the transformer oil fault detection is improved, and the engineering application of the fluorescence monitoring technology in the transformer fault online diagnosis is realized.

The utility model relates to the technical field of component detection, and discloses copper slag component detection equipment. The copper slag component detection equipment comprises a placement structure assembly, a detection equipment assembly is installed at the upper end of the placement structure assembly, a collimator is installed at the upper end of the detection equipment assembly, a fixing plate is installed on the right side of the collimator, a computer is installed at the upper end of the fixing plate, and a communication module is installed at the upper end of the computer. A control module is mounted on the left side of the communication module, an amplitude analysis module is mounted on the left side of the control module, a detector is mounted on the left side of the amplitude analysis module, and a cleaning assembly is mounted in the placement structure assembly; the method can effectively prevent the situation that high-speed electron beams need to be used for bombarding the surface of a sample when the electron probe X-ray fluorescence spectrometry is used for detecting the copper slag, follow-up copper slag scattering is caused, and the upper end of the detection table is disordered.

The invention discloses a benzo [a] pyrene on-site rapid quantitative detection method and system and a storage medium. The detection method comprises the following steps: automatically collecting an original sample fluorescence spectrum of a to-be-detected sample, adding a preset amount of a standard solution of a safety standard substance, collecting a labeled spectrum, establishing a dual-mode dynamic correction framework, and realizing self-calibration by utilizing the response of the labeled safety standard substance; the signal intensity of a safety standard substance peak and a benzo [a] pyrene peak is extracted according to a preset peak window, the response coefficient and the concentration increment of a standard substance are calculated through an internal standard method, and the concentration of benzo [a] pyrene in a sample is calculated through a relative response factor. Complex correction and quantification processes are carried in a storage medium or a detection system and converted into one-button operation, and the method can be used for a small fluorescence spectrometer to realize on-site rapid quantitative detection of benzo [a] pyrene.

The application specifically relates to a method for analyzing the content of impurity elements in a neodymium iron boron material by a fusion sample preparation-X-ray fluorescence spectrometry, and belongs to the technical field of analytical chemistry and material detection. The method comprises the following steps: after grinding, a sample is pre-fused in a platinum-gold crucible by using anhydrous lithium tetraborate to form a protective layer; lithium carbonate is added as an oxidant and vanadium pentoxide is added as an internal standard, and after pre-oxidation in stages, the sample is high-temperature fused to prepare a glass sheet; under optimized instrument conditions, a working curve is established by using a series of standard fusion sheets, a to-be-measured fusion sheet is measured, and the content of each element is calculated. Through the synergistic technology of the "flux protective layer-dry pre-oxidation-internal standard correction", two major problems of corrosion of active metals on the crucible and correction of the complex matrix effect are solved, and 10 kinds of elements such as Al, Cu, Co, Ga, Dy and Tb can be simultaneously and accurately measured. The method is safe in operation, high in efficiency and good in reproducibility, and is suitable for quality control and composition analysis of a neodymium iron boron permanent magnet material.

A ferrochrome standard sample is utilized to establish a ferrochrome analysis method, and a ferrochrome calibration curve is drawn. The linear range of chromium is 53.51-76.24, the linear range of Mn is 0.1-1.39, the linear range of P is 0.0108-0.078, the linear range of Ti is 0.016-0.539, and the requirements of the daily analysis range are met. The method comprises the following steps: preparing a flux crucible; lithium carbonate and sodium carbonate are subjected to segmented oxidation; according to the three-step operation method of melting and sample preparation, selection of a flux, selection of an oxidizing agent, selection of a pre-oxidation temperature and the use amount of a release agent are discussed. As the content of carbon in ferrochrome is high, correction of ignition loss of carbon is added, and an ideal result is obtained. A test result shows that a smooth glass sheet can be prepared by adding a proper potassium iodide release agent into a sample and a flux according to a proper dilution ratio, a standard sample is selected for an accuracy experiment, an analysis result and a standard value error are both within a national standard error range, and a precision and method comparison test result shows that the requirements of daily analysis can be met.

The application provides a temperature measurement system and method based on fluorescence imaging and ratio in a microwave field, adopts a combined mode of fluorescence imaging and fluorescence spectrometry, and divides fluorescence emitted by a chemical reaction container into two paths by an integrating sphere module; first path emergent light enters a fluorescence imaging module, and temperature distribution on a surface of the container is directly reflected by fluorescence imaging; second path emergent light enters a fluorescence spectrometry temperature measurement module, and temperature on the surface of the container is measured according to a characteristic peak of a fluorescent body and a Boltzmann-thermal law. Non-contact optical temperature measurement with high performance is realized, and spatial resolution in a temperature measurement process in the microwave field is improved.

The invention discloses a method for determining the ash content of recycled plastics by combining infrared spectroscopy with X-ray fluorescence spectroscopy, which comprises the following steps: quickly judging the types of the recycled plastics by using a near infrared spectrometer, selecting the recycled plastics with different ash contents as standard samples, and determining the total element content of the plastics by using an X-ray luminoscope, the method comprises the following steps: taking organic components of recycled plastic as equilibrium phases to participate in calculation to obtain theoretical ash content of the plastic, segmenting a standard sample according to the ash content, and respectively performing function fitting on the segmented standard sample and actual ash content; and measuring the fluorescence spectrum of the sample to be measured, calculating the theoretical ash content, and correcting the theoretical ash content by using the fitting function. Compared with a standard ash content measurement method, the method reduces environmental pollution, and is simple, rapid, environment-friendly and safe. Compared with an empirical coefficient method of X-rays, a direct tabletting method can be selected, so that the analysis efficiency is improved; meanwhile, the matrix effect and element spectral line overlapping are avoided, and the analysis precision is improved.

A particle analysis system comprising: a light detector that acquires light generated by irradiating a particle with excitation light; and an information processing unit that outputs a spectral plot including spectrum information of an autofluorescence population specified in a two-dimensional plot of measurement data each of which corresponds to the acquired light and spectrum information of the measurement data and that records the spectrum information of the autofluorescence population as an autofluorescence reference spectrum in a fluorescence separation process.

This invention discloses a system, method, and computer program product for determining the mass fraction of one or more elements in a test sample based on measurements performed by a wavelength dispersive X-ray fluorescence spectrometer (WDX spectrometer), which measures the total intensity associated with the corresponding element in the test sample having a mass fraction to be determined. A mass fraction module determines the mass fraction using a calibration formula with the measured total intensity and a correspondingly calculated scattering efficiency as input. The elemental composition of the test sample is determined in either of the following ways: via an iterative module adapted to iteratively determine a mass fraction estimate of the specific elemental composition based on the measured total intensity associated with the element in the test sample; or via an EDX quantization module adapted to obtain a mass fraction estimate of the specific elemental composition based on quantization using an energy-dispersive X-ray detector.

The invention relates to a preparation and detection method of a copper ore sample for X-ray fluorescence spectrum analysis. The preparation method comprises the following steps: mixing ore coarse powder and a binder, and grinding; paving a layer of boric acid in a tabletting ring, uniformly paving the powder on the boric acid, and pressing by using a tabletting machine to obtain a tabletting sample; the binder is obtained by coordination of polyacrylic acid and polyvinyl alcohol europium nitrate. According to the invention, a sample formed by pressing by uniformly paving the prepared adhesive-containing fine powder on a common adhesive boric acid for bottoming is more uniform and compact, has a firm structure and a flat and crack-free surface, and does not fall off slag; the prepared tablet is directly tested by an X-ray fluorescence spectrometry, so that the operation efficiency is high, and the analysis data is reliable; the rare earth material is applied to the X-ray fluorescence spectrum analysis of the copper ore for the first time, has a synergistic effect on fluorescence imaging, and does not interfere with a main peak; the process of dissolving, heating, cooling and curing is omitted through direct tabletting, polyacrylic acid and polyvinyl alcohol serve as ligands, the bonding effect is achieved, and it is guaranteed that tablets are compact and complete.

A kind of method for determining sulfide in environmental water body is determined by using X-ray fluorescence spectrometry.In environmental water body, slightly excessive copper chloride solution and sodium hydroxide solution are added to convert unstable sulfide into extremely difficultly soluble copper sulfide precipitate, 0.23 μm PTFE filter membrane is used to filter sample preparation technology to enrich and separate copper sulfide precipitate in environmental water body, dilute hydrochloric acid is used to wash the precipitate to remove Cu (OH) 2 and Cu 2+ Residue, the microporous filter membrane that is naturally dried is pressed into sheet in the middle of two polyethylene sheets under high pressure condition, the copper element content in difficultly soluble copper sulfide is determined by WDXRF, and then the concentration of sulfide in environmental water body is obtained according to the conversion of equal molar quantity.The present application has the advantages of low detection limit, high accuracy, good precision, wide linear range and short analysis time.

The utility model belongs to X -ray fluorescence spectrum detection field discloses a kind of for down irradiation type X -ray fluorescence spectrometer sample fixing device, including pedestal, datum plane, spring stopper, spring, inner hexagonal bolt, slide slot, V -shaped sliding block, threaded hole A, threaded hole B, boss and lead screw.The utility model is adapted to most down irradiation type X -ray fluorescence spectrometer, easy to install and disassemble, convenient to operate, sample is easy to prepare, especially applicable to Malven Pananako X -ray fluorescence spectrometer.Height can be adjusted by rotating screw, suitable for the sample of certain size range in height.V -shaped groove used in cooperation with spring can be fixed in the cylindrical body or cuboid sample of certain size range change, solve the problem of small sample centering and moving.Pedestal uses the material quality of steel, using dead weight betterly adheres sample test surface to test surface cover.