83 results about "Fluorescence spectrometry" patented technology

The invention provides a method for rapidly detecting wastewater pollutants by atomic fluorescence spectrometry, and belongs to the technical field of wastewater treatment.The method comprises the steps that atomic fluorescence spectrum data of a wastewater sample are collected to establish a spectrum interference matrix to characterize the spectral line overlapping condition between elements; abnormal values are recognized through statistical analysis, a spectrum outlier matrix is built, abnormal fluorescence intensity distribution is recorded, sample matrix non-characteristic fluorescence signals are measured, a background fluorescence interference matrix is built, background interference intensity is quantized, system signal change rules are continuously monitored and detected, and a signal drift tendency matrix is built to predict the signal drift tendency. A spectrum interference matrix and a background fluorescence interference matrix are processed through a spectrum analytic function, compensation factors are calculated, spectrum overlapping and background interference influences are corrected, system drift is corrected in real time, and a final wastewater pollutant concentration detection result is output, so that the technical problem of unstable detection precision caused by coupling of multiple interference factors is solved.

The invention discloses a method for detecting soil active organic carbon based on fluorescence spectrometry, and belongs to the technical field of soil detection. The method comprises the following steps: sequentially drying, sieving and grinding fresh soil to obtain a soil sample, and sequentially performing active organic carbon extraction, purification, decoloration and pH regulation on the soil sample to obtain a soil liquid to be detected. The method comprises the following steps: adding fluorescein into a soil liquid to be detected to form a soil internal standard detection liquid, obtaining a soil fluorescence spectrum through three-dimensional fluorescence spectrum scanning, carrying out background deduction and correction coefficient correction, and calculating the active organic carbon concentration of the soil by using tryptophan, tyrosine and SMP fluorescence concentration standard curves. According to the method, an internal standard method is combined with a fluorescence spectrum technology, and through multi-step sample pretreatment and spectrum correction, the detection accuracy and the anti-interference capability are improved, the active organic carbon concentration of the soil can be rapidly and accurately determined, and an effective means is provided for soil carbon cycle research and quality evaluation.

The invention discloses a multi-element information acquisition and analysis system based on telemetering drifting buoys, and relates to the technical field of marine environment monitoring. A three-dimensional fluorescence spectrometer, a temperature-salinity-depth sensor, a positioning module and a miniature water sampler are carried on each telemetering drifting buoy; the system is used for collecting algae fluorescence spectrums, water quality parameters and position data in real time, inputting the data into a trained random forest model to output the red tide occurrence probability, triggering multi-level early warning in combination with a preset expert rule engine, linking air and shore-based equipment and a data storage system, and utilizing laboratory true value data obtained by a miniature water sampler to determine the red tide occurrence probability. And performing incremental training on the random forest model every day, thereby dynamically optimizing internal structure parameters of the model. The method effectively improves the prediction probability of the red tide.

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.

The invention belongs to the technical field of X-ray fluorescence spectrum analysis, and provides a WDXRF testing method based on polyester film pretreatment and application thereof.The method comprises the steps that a sample to be tested is placed in a sample cup, covered with a polyester film and pressed into a tablet through a hydraulic machine, the tablet is placed in a mold, and a WDXRF test is conducted; the parameters of the hydraulic machine comprise that the target pressure is 300-400 kn, and the pressure maintaining time is 5-20 s; the pressing time is 3-5 s; the sampling time is 5-7 s; the sample adding depth is 7-9 s. The method disclosed by the invention is simple, convenient and feasible, is low in cost, can be widely applied to WDXRF tests of various special samples, and has extremely high practical value. According to the method, the polyester film is used for treating the special sample, so that the test of the special sample which cannot be tested originally is realized, the change of sample components is avoided, the side effect is small, the accuracy is high, and the test method has an important application prospect.

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 invention discloses a method for determining and analyzing lead, cadmium, iron and zinc in lead smoke dust through X-ray fluorescence spectrometry, and belongs to the technical field of determination and analysis of components of comprehensively recycled lead smoke dust in zinc smelting production. The method comprises the following steps: preparing an analysis sample by adopting a direct tabletting method without acid digestion of a sample and directly preparing soot powder under the working pressure of 30-40T and the dwell time of 15 seconds. A multiple regression correction method is adopted to correct matrix interference, a Pb L beta 1 element spectral line is selected to eliminate overlapping interference of a Pb K alpha 1.2 spectral line and an As K alpha 1.2 spectral line, and then a correction formula is added. The sample does not need to be subjected to complex chemical treatment, the original state of the cigarette ash sample can be kept, and multiple analysis or other subsequent tests can be carried out on the same batch of samples. The method can be used for simultaneously analyzing multiple elements, namely simultaneously determining multiple elements in the soot from macroelements to microelements such as Pb, Zn, Cd, Fe and the like, so that the analysis efficiency is greatly improved.

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 fluorescent substance characteristic wavelength quantitative analysis method based on concentration-dependent red shift induced by an inner filter effect. The method comprises the following steps: acquiring fluorescence spectrums of a series of fluorescent substance solutions with a series of concentrations; preprocessing the spectrum, and extracting characteristic wavelengths (peak wavelength lambdamax and wavelengths lambdal and lambdar corresponding to specific intensity nImax at two sides of a peak value); constructing a linear model of the characteristic wavelength and the concentration, and determining an optimal fitting model by dynamically optimizing a scale factor n and a wavelength combination strategy; and high-precision and wide-range quantitative analysis of the concentration of the solution to be detected is realized by using the optimal model. According to the method, the linear detection range can be expanded to more than 5 times that of a traditional method, the relative average error is smaller than 1%, the method is not influenced by hardware parameter fluctuation, and the range and precision of fluorescence quantitative analysis are remarkably 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.

The invention belongs to the technical field of chemical analysis, and particularly relates to an X-ray fluorescence spectrometry method for rapidly and synchronously determining primary and secondary components of silicon, calcium, aluminum and phosphorus in a silicon nitride alloy. According to the method, a crucible is lined with lithium tetraborate, an oxidizing agent and a fusing agent in a certain proportion are added, and a proper sample pre-melting oxidation procedure is set, so that the rare earth nitrogen alloy can be made into a glass casting sheet sample meeting the measurement requirement of an X-ray fluorescence instrument, and the content of various components in the alloy can be synchronously tested through the X-ray fluorescence spectrometry; the detection time is greatly saved, the electricity and gas expenses are saved, the detection cost is reduced, and meanwhile, the blank of no method for rapidly and accurately determining the elements in the rare earth nitrogen alloy at the same time is filled up.

The present invention provides a planar XY micro-motion device for a coating thickness gauge, comprising: a sample carrier, a slide seat, a slide middle seat and a slide base, wherein the slide middle seat is slidably connected to the slide base in the X direction, and the slide carrier is slidably connected to the slide middle seat in the Y direction; an X-axis transmission positioning seat is provided on one side of the slide base, and an X-axis screw nut seat is provided on one side of the slide middle seat. The sample carrier is mounted on the slide seat, which enables an X-ray fluorescence spectrometry coating detector to accurately locate the position of a small sample to be inspected, thereby improving detection efficiency. The planar XY micro-motion mechanical device in the present invention can be conveniently installed on a coating thickness gauge, and the position of the item to be inspected can be adjusted after closing the instrument protective cover, thereby ensuring the controllability of the position of the item to be inspected while protecting operational safety.

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.

This invention provides a fluorescent probe for label-free, multifunctional, low-cost, and high-throughput real-time monitoring of tyrosine phosphorylation. Our designed fluorescent molecule specifically binds to copper ions in aqueous solution, leading to fluorescence quenching. Adding a phosphorylated substrate peptide with tyrosine residues to the quenched system elicits a dramatic change in fluorescence, with the solution color changing from purple to red. However, no significant fluorescence change is observed upon adding non-phosphorylated substrate peptides or other phosphate-related ions. This on-off fluorescence response enables real-time monitoring of tyrosine phosphorylation, with a detection limit of 100 nM. This method can also be applied to the rapid screening of PKA kinase inhibitors and to the detection of serine, threonine, and phosphorylated peptides at mono- and diphosphorylated sites. The greatest advantage of this fluorescence spectroscopy method is that it does not require antibodies or radioactive isotopes, has simple operating procedures, and is highly suitable for the real-time detection of protein tyrosine phosphatase activity.

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 invention belongs to the field of chemical analysis of spectrometry, and particularly relates to a method for detecting mercury content in copper slag concentrate by atomic fluorescence spectrometry. The method comprises the following specific steps: fully dissolving a copper slag concentrate sample to be measured by hydrochloric acid, nitric acid and ammonium bifluoride, and introducing generated mercury atom steam into an atomic fluorescence spectrometer for measurement in a (3 + 97) nitric acid medium by taking stannous chloride as a reducing agent and argon as carrier gas. The method has the characteristics of low detection lower limit, wide measurement range, high accuracy, good precision, strong practicability and the like.

X-ray fluorescence spectrometry for characterizing the microstructure of a metallic alloy and detecting chemical segregations. One aspect of the invention relates to a method for determining at least one microstructural property of a metallic alloy on the surface of a part made from said metallic alloy.

The invention belongs to the technical field of analysis and detection, and discloses an X-ray fluorescence spectrum analysis method for measuring the content of iron and phosphorus in iron phosphate, which comprises the following steps: fitting to obtain a standard working curve of the Fe element according to the corresponding relationship between the content of the Fe element in a plurality of iron phosphate standard samples and the fluorescence intensity of the Fe element; fitting to obtain a standard working curve of the P element according to the corresponding relationship between the content of the P element in the plurality of iron phosphate standard samples and the fluorescence intensity of the P element; detecting the tablet to be detected by adopting an X-ray fluorescence spectrophotometer to obtain the fluorescence intensity of the Fe element and the P element in the tablet to be detected; and obtaining the contents of the Fe element and the P element in the to-be-detected iron phosphate according to the standard working curves of the Fe element and the P element. According to the determination method provided by the invention, the use cost of consumables / reagents is remarkably reduced, the use of dangerous and toxic chemical reagents can be avoided, the test process is simple and convenient, and the test result is accurate and reliable.

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 present invention relates to the field of environmental testing technology, and in particular to a fluorescence spectrometry method for determining the molecular weight of natural dissolved organic matter. The fluorescence spectrometry method for determining the molecular weight of natural dissolved organic matter comprises the following steps: (a) preparation of a natural dissolved organic matter test solution and a background solution; (b) selection of the fluorescence peak position in a titration experiment; (c) fluorescence quenching titration of the natural dissolved organic matter; (d) fluorescence measurement of the background solution; and (e) calculation of the molecular weight of the natural dissolved organic matter. This method is not only simple to operate, but also has low requirements for equipment and operating skills. Model compounds of natural dissolved organic matter molecules such as tyrosine and natural dissolved organic matter standard samples have been used to prove that the method results are accurate and reliable.

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.