26 results about "Fluorescence spectroscopy" patented technology

This invention discloses a method for quantitative analysis of multiple components in oxidized slag based on X-ray fluorescence spectroscopy, belonging to the field of industrial process detection technology. The method includes: acquiring the raw energy spectrum data of a standard oxidized slag sample and the oxidized slag sample to be tested, and performing background subtraction and smoothing noise reduction; extracting the integral intensity of the characteristic peaks of target elements, establishing spectral interference correction relationships and matrix effect compensation relationships; establishing regression prediction models and residual compensation models for each target oxide based on the compensated characteristic intensities; inputting the characteristics of the sample to be tested into the models, and outputting the final predicted values ​​of each target oxide; improving the accuracy of feature information extraction in the multi-component system of oxidized slag, reducing errors caused by spectral overlap, excitation effects, and matrix effects, and improving the accuracy, result stability, and prediction consistency of quantitative analysis of multiple target oxides under different sample conditions, making it suitable for rapid detection and analysis of complex oxidized slag samples.

The invention discloses a sulfur-nitrogen co-doped carbon quantum dot modified polyaspartic acid derivative as well as a preparation method and application thereof. The derivative is prepared by taking citric acid and L-cysteine as precursors, synthesizing sulfur-nitrogen co-doped carbon quantum dots (SN-CDs) with rich functional groups on the surface by adopting a hydrothermal method, and introducing the sulfur-nitrogen co-doped carbon quantum dots into a side chain of polyaspartic acid (PASP) through graft copolymerization. The derivative not only retains the complexing ability of polyaspartic acid with metal ions such as calcium and magnesium, but also has excellent scale and corrosion inhibition performance; the optical characteristics of the carbon quantum dots are inherited, and stable fluorescence can be emitted under the excitation of specific wavelength, so that in-situ and real-time concentration monitoring in an industrial circulating cooling water system by utilizing a fluorescence spectrum technology is supported. The product does not contain phosphorus, is environment-friendly, conforms to the development trend of a green water treatment technology, and provides an innovative material solution for intelligent monitoring and fine management of a circulating water system while improving the comprehensive performance of scale and corrosion inhibition.

The application discloses a kind of benzindole fluorescent probe compounds and preparation method and application thereof, belong to fluorescent sensing technical field.The benzindole fluorescent probe compound is (E) -3- (4-boronic acid group benzyl) -2- (4-diethylaminostyryl) -1, 1-dimethyl-1H-benzo [e] indol-3-ium.The benzindole fluorescent probe provided in the application uses phenylboric acid as recognition site, can occur selective self-elimination reaction with peroxynitroso anion, to realize the accurate capture and efficient detection of ONOO ‑ With high specific recognition ability.Dual function of viscosity and ONOO ‑ Detection, can be identified and quantitatively analyzed to viscosity change and ONOO ‑ Concentration by fluorescence spectroscopy.The benzindole fluorescent probe compound provided in the application has simple molecular structure, mature synthesis route and easy to scale preparation.

This invention discloses a method for determining the concentration of sulfated glycosaminoglycans using fluorescence spectroscopy. The fluorescent probe carries a certain number of arginine residues. Utilizing the electrostatic interaction between the amino groups on the arginine residues and the sulfate ions on the sugar chains, a series of fluorescent probe molecules can align neatly along the sugar chains to form a stable fluorescent complex. Due to the small spatial distance between the fluorescent chromophores in the complex, the original fluorescence emission band shifts. By calculating the ratio of the fluorescence intensities at two points, the concentration of sulfated glycosaminoglycans can be determined. This invention provides accurate detection results, good reproducibility, and high sensitivity; the experimental materials are simple, saving a significant amount of time.

This invention discloses a nanosheet Tb-MOF fluorescence sensor for detecting Al in phosphogypsum and red mud. 3+ The detection application utilizes Tb(NO3)3·5H2O and H4BTTC as raw materials, with benzoic acid as a modifier, to prepare a Tb-BTTC MOF fluorescent sensor with a nanosheet structure and benzothiadiazole functionalization using a microwave-assisted synthesis method. This material can be used as a fluorescent sensor to detect Al in phosphogypsum and red mud. 3+ This invention utilizes highly selective, "on"-type fluorescence enhancement detection, accompanied by a significant blue shift (approximately 10 nm), with a fluorescence spectroscopy detection limit of 0.065 μM. It constructs an intelligent sensing platform integrating a smartphone and a portable UV lamp, achieving Al2O3 detection through fluorescence color and RGB analysis. 3+ The rapid on-site quantitative detection method can be applied to the rapid and visual detection of aluminum ions in solid wastes such as red mud and phosphogypsum, providing new materials and methods for the real-time and portable detection of aluminum ions in red mud and phosphogypsum.

This invention discloses a multi-mode non-destructive testing method and system for turbine blades, relating to the field of non-destructive testing technology for aero-engine and gas turbine turbine blades. Addressing the problems of isolated and spatially uncorrelated data from existing fluorescence penetrant testing, X-ray fluorescence spectroscopy, and X-ray diffraction testing, which makes it difficult to quantitatively assess the risk of penetration coupled with surface defects and residual stress, this invention uses the three-dimensional point cloud of the turbine blade as a benchmark to achieve pixel-level spatial registration of the three types of testing data. By calculating the distance from the bottom of the surface defect to the high-stress zone and combining it with a safety threshold dynamically correlated with the material's fracture toughness and residual stress peak value, the invention automatically and quantitatively determines the penetration risk and outputs quality conclusions based on multi-modal features. It can also automatically generate laser repair paths and G-codes. This invention significantly improves testing accuracy and efficiency, forming an intelligent closed loop of testing and repair, and is suitable for turbine blade manufacturing quality assessment and service life prediction.

This invention discloses a multi-point online inspection system and method for liquid components based on XRF detection. In this system, multiple sampling mechanisms are installed at various designated points corresponding to the liquid tanks to be tested, used to extract and temporarily store liquid from the tanks. An inspection robot carries a liquid component detection unit and moves to the target location according to inspection commands issued by a central control computer. A sample cup positioning structure ensures precise alignment between the liquid component detection unit and the sample cup. The liquid component detection unit performs component detection on the liquid temporarily stored in the sample cup using X-ray fluorescence spectroscopy. The central control computer communicates with the liquid component detection unit, the inspection robot, and the sampling mechanisms, issuing inspection and sampling commands. This invention integrates X-ray fluorescence detection technology, robot movement technology, and automatic sampling technology to achieve automated, rapid, and accurate detection of liquid components at multiple points in the smelting process.

1. Name of the product in this design: Water Quality Early Warning and Source Tracing Analyzer (Three-Dimensional Fluorescence Synchronous Absorption). 2. Purpose of this design: For use in a water quality monitoring device based on three-dimensional fluorescence spectroscopy technology. 3. The key design features of this product are the combination of the overall shape and pattern of the product. 4. The image or photograph that best illustrates the design's key points: 3D view 1.

Method for detecting a viral agent, comprising the steps of : providing a sample to be analysed in liquid form; introducing one or more antibodies labelled with one or more fluorophores, said antibodies being configured to selectively bind with one or more proteins of an outer membrane of the viral agent; eliminating unbound labelled antibodies; exposing the s amp 1 e to electromagnetic radiation; detecting a fluorescence response emitted by the labelled antibodies; and detecting the viral agent on the basis of the detected fluorescence response.

This invention relates to spectroscopic technology, specifically providing a method for oil analysis in water based on the fusion of ultraviolet absorption spectroscopy and three-dimensional fluorescence spectroscopy, comprising the following steps: A1. Obtaining oil samples of different types and concentrations, and obtaining the corresponding ultraviolet absorption spectra and three-dimensional fluorescence spectra; A2. Expanding the three-dimensional fluorescence data and ultraviolet absorption spectral data, corresponding to the excitation wavelength, and stitching the two together to obtain the fused spectrum, with absorbance as a separate column; A3. Decomposing the fused spectrum X and the dependent variable matrix Y; obtaining a set of T and U with the maximum covariance, thereby obtaining the model B=(T T T) ‑1 T T U; A4. Obtain a water sample, obtain the corresponding fusion spectrum according to A1 and A2, and use the model to obtain Y, thereby determining the type of oil in the water and the corresponding concentration. This invention has advantages such as accuracy.

A resin particle having a parent particle containing a biodegradable resin, wherein the amount of alkali metal atoms A present in the surface of the resin particle relative to the total amount of atoms present in the surface of the resin particle, measured by X-ray photoelectron spectroscopy, and the amount of alkali metal atoms B present in the resin particle relative to the total amount of atoms present in the resin particle, measured by X-ray fluorescence spectroscopy, satisfy the relationship 0 ≤ (A / B) < 0.15 and 0.005 atomic% ≤ B ≤ 0.5 atomic%.

This invention belongs to the field of pharmacology and provides the application of demethoxycurcumin and phlorizin in the preparation of drugs that inhibit β-lactoglobulin glycosylation. The synergistic inhibitory effects and mechanisms of demethoxycurcumin and phlorizin on AGEs were systematically investigated. Fluorescence spectroscopy and carbonyl / thiol / amino group assays confirmed that demethoxycurcumin and phlorizin can synergistically inhibit β-lactoglobulin glycosylation at appropriate concentrations. Circular dichroism spectroscopy and other experiments showed that the combined use of the two can better alleviate protein secondary structure changes and aggregation. They competitively bind to the same glycosylation site, synergistically resist oxidation, thereby inhibiting AGEs formation, and synergistically reducing oxidative stress, cell damage, and apoptosis at the cellular level. Therefore, the combined application of these two drugs has potential therapeutic value in intervening in diabetic complications.

This invention provides a method and system for the supermicrowave digestion and determination of thallium in ores. Based on X-ray fluorescence spectroscopy, the matrix insolubility index is calculated to establish the digestion decision variables. Redundant points are eliminated using Sobol sequences combined with Thiessen polygons, and a non-uniform experimental design is constructed to obtain training data. On this basis, a hybrid response surface model is constructed, and kernel partial least squares regression is applied to fit the main trend, Gaussian process regression is used to process the residuals, and the interference index is introduced as a hyperparameter. The Grey Wolf optimization algorithm, incorporating Lévy flight, is used to optimize the ore while ensuring low residual organic carbon and maximizing the recovery rate. The obtained optimal parameters are used for supermicrowave digestion of the ore, and the thallium content is determined by ICP-MS, achieving efficient and accurate detection.

The application discloses a new reclaimed soil exogenous carbon precise application method based on fluorescence spectrum technology, relates to the technical field of soil improvement, and specifically comprises the following steps: (1) soil background carbon activity diagnosis: collecting a new reclaimed farmland soil sample, extracting DOM in the soil, obtaining the fluorescence integral area of five characteristic peak regions through three-dimensional fluorescence spectrum scanning, calculating fluorescence parameters FI, BIX and HIX according to the proportion, and evaluating the soil carbon stability and activity short board through the fluorescence parameters; (2) exogenous carbon material screening model construction: establishing a mapping relationship between fluorescence characteristic parameters and carbon function demand; and (3) precise addition and effect verification: dynamically adjusting the types and proportions of exogenous carbon according to the diagnosis result. The application determines the soil dissolved organic carbon components through fluorescence spectrum measurement, reflects the soil carbon pool difference between the new reclaimed farmland and the mature farmland through fluorescence component analysis, selects appropriate organic material addition, and achieves the purpose of rapid composting of the new reclaimed farmland.

This invention discloses a Fe3O4@SiO2 / polyurethane composite photonic crystal sensor, its preparation method, and its applications, belonging to the field of photonic crystal sensor technology. This invention achieves spatial modulation of the C6 fluorescence signal and enhancement of the local photonic field by spectrally matching the reflection band of the structured photonic crystal with the C6 emission band. This results in significant fluorescence quenching response even under extremely low PA concentrations, overcoming the limitation of low sensitivity in traditional fluorescence detection. Compared with traditional HPLC or conventional fluorescence spectroscopy methods, the photonic crystal enhancement system of this invention can improve PA detection sensitivity by approximately 3-4 orders of magnitude, while exhibiting good reproducibility and environmental stability.

The application relates to a method for promoting generation of advanced glycation end products, comprising the following steps: preparing a reaction solution by mixing proteins, reducing sugar and riboflavin in a buffer solution; making the reaction solution undergo photo-thermal synergistic reaction to obtain a solution rich in the advanced glycation end products; and monitoring the generation amount of the advanced glycation end products by using fluorescence spectroscopy during the reaction process. The application uses the natural photosensitizer riboflavin to produce active ingredients under light conditions, accelerates the glycosylation reaction of bovine serum albumin and glucose, and effectively solves the problem of slow generation rate of the advanced glycation end products under normal temperature conditions.

Apparatus, methods and systems relating to fluorescence imaging, and more particularly, to reducing or eliminating injuries by a catheter in fluorescence spectroscopy systems, as well as optical coherence tomography (OCT) systems.

This invention discloses a copper thiadiazole complex and its synthesis method. The copper thiadiazole complex has the chemical formula [C3H5ClCuN3S] and belongs to the monoclinic crystal system. A novel copper 2-amino-5-methyl-1,3,4-thiadiazole complex was synthesized using a solvothermal method with 2-amino-5-methyl-1,3,4-thiadiazole as the ligand and copper chloride as the transition metal. The complex provided by this invention was confirmed by UV-Vis absorption spectroscopy and fluorescence spectroscopy to be able to electrostatically bind to calf thymus DNA and to exhibit hydrophobic interactions with human serum albumin (HSA), showing potential applications in chemical biology research.

This invention discloses an online fluorescence spectroscopy detection device for the aging-resistant components of waterproof coatings, belonging to the field of coating waterproofness testing technology. It utilizes a combination of a fluorescence excitation component and a spectral acquisition component for detection. Finally, based on the fluorescence intensity and a calibration model, the specific content of the aging-resistant components is calculated. After fluorescence spectroscopy detection, the macroscopic physical properties of the waterproof coating are verified by immersion to determine the coating's functional effectiveness in actual use. By enabling simultaneous immersion of two samples at different depths in the same immersion container, the same immersion liquid system, and under the same disturbance conditions, the comprehensiveness of the detection is improved. The swaying movement design, through small lateral swings, ensures that each detection surface of the sample can fully contact the immersion liquid, guaranteeing that the extracted component data during subsequent fluorescence spectroscopy detection accurately reflects the overall aging-resistant performance of the sample, rather than partial data from local areas.

This invention discloses a pollution source tracing method that couples water system topological constraints with multi-source tracing technology. This invention relates to the field of environmental monitoring and water pollution control technology, and includes the following steps: constructing a digital water system topology network for a watershed: based on digital elevation model data of the target watershed, after hydrological preprocessing, flow direction calculation, runoff accumulation analysis, and river network extraction, the natural river network is abstracted into a topological network graph composed of nodes and directed edges. A reachability matrix is ​​generated based on the directed edge connection relationships. The advantages of this invention are: by fusing four complementary chemical fingerprints—stable isotopes, biomarkers, three-dimensional fluorescence spectroscopy, and conventional water quality physicochemical parameters—a high-dimensional feature space is constructed. Cross-validation is performed using the distinguishing advantages of different fingerprints in different dimensions, effectively overcoming the source type confusion problem caused by insufficient dimensions of a single indicator, and significantly improving the specificity and accuracy of source identification.

This invention discloses a method for retrieving microcystin content in water using algal fluorescence spectroscopy. First, fluorescence spectral data of N algal solution samples with different concentrations are measured, and after preprocessing, the data are converted into a one-dimensional array M of length p. p Furthermore, all the corresponding one-dimensional arrays are combined into a matrix X. N The microcystin content of N algal solution samples was determined, forming a matrix Y. N Based on matrix X N With matrix Y N Establish model M ridge The fluorescence spectrum data of the sample to be tested were measured, and after preprocessing, they were converted into a one-dimensional array M of length p. px This is further transformed into matrix X. p Substitute into the established model M ridge In the model, the predicted values ​​of microcystin are automatically provided. Model M ridge During the modeling process, factors affecting fluorescence spectroscopy and algal growth can be incorporated to further improve model accuracy. This method is more accurate, simple, quick, and convenient, facilitating on-site monitoring and possessing significant practical value.

This invention discloses a quantitative analysis method for target components in mixtures based on optimal transport cross-domain distribution alignment. This method addresses the significant shortcomings of current mainstream fluorescence spectroscopy-based classification and quantification methods in continuous concentration quantification and generalization of unknown adulterants. Specifically, the types of adulterants appearing during the testing phase must have been covered during the training phase; otherwise, the predictive performance stability will significantly decrease. The method of this invention employs a technical path of "spectral acquisition and preprocessing—distribution alignment—regression prediction," constructing a two-stage analysis workflow of "optimal transport + regression." This achieves robust quantification of the continuous content of target components in a mixture system without relying on prior enumeration of adulterants or using target domain concentration labels. This invention is applicable to other spectral analysis applications involving the recovery of continuous physical quantities, such as food safety testing, food chemical analysis, and material composition analysis.

This invention, a transformer fault type discrimination method based on fluorescence spectroscopy correction, belongs to the field of transformer fault diagnosis technology. It addresses the problem of designing a simple, computationally efficient method for rapidly identifying transformer fault types, particularly thermal aging and discharge breakdown faults. The invention establishes a mapping relationship between the fluorescence spectrum of transformer oil and the concentration of aromatic hydrocarbons using a multivariate regression correction method. A multivariate correction filter is designed based on transmittance to calculate the aromatic hydrocarbon concentration in the transformer oil, replacing the fluorescence spectrometer. This not only reduces equipment costs and size but also improves the cost-effectiveness of transformer oil fault detection. Furthermore, based on the time-periodic characteristics of thermal aging and discharge breakdown faults, the rate of change in aromatic hydrocarbon concentration is used to distinguish the transformer fault type, greatly simplifying the calculation process and reducing computational load. This is of significant importance for extending the service life of transformers.

This invention discloses a rapid method for detecting and analyzing the composition of geological experimental samples, belonging to the field of geological analysis and testing technology. The method includes: acquiring multimodal data such as laser-induced breakdown spectroscopy, X-ray fluorescence spectroscopy, and Raman spectroscopy; performing baseline correction, noise filtering, and feature extraction through multi-agent collaborative processing; constructing a deep reinforcement learning feature selector to dynamically screen cross-modal shared sparse feature sets and heterogeneous complementary feature sets; using an improved ant colony algorithm and a Bayesian neural network for adaptive weighted fusion; constructing a physical information constraint network embedded with geochemical constraints to generate preliminary predicted values; and finally correcting abnormal predicted values ​​using a graph neural network topology corrector to output the final compositional analysis results. This invention integrates multi-agent algorithms with prior physical knowledge, significantly improving the accuracy, robustness, and interpretability of geological sample compositional analysis, and solving the problems of low analytical accuracy, poor generalization ability, and lack of physical consistency in existing technologies.

This invention discloses a flexible aerogel-coated iron porphyrin carbon dot composite material and its preparation method, relating to the field of environmental functional materials. The invention employs an organosilicon-based flexible aerogel and iron porphyrin carbon dots prepared within a specific raw material mass ratio range, compounded at a certain mass-volume ratio. The resulting flexible aerogel-coated iron porphyrin carbon dot composite material can significantly adsorb Fe²⁺. + Zn² + Cd² + It contains heavy metal ions, possesses good mechanical flexibility, and has unique fluorescence response characteristics. It can detect the concentration of heavy metal ions through fluorescence spectroscopy, meeting the integrated needs of environmental remediation for heavy metal ion adsorption and ion concentration detection, and has the potential for recycling and reuse.

This invention belongs to the field of plastic recycling technology, specifically a method for preparing recycled plastics. The specific steps of this method are as follows: pretreatment and grading of waste plastics, differential and precise sorting of additives, low-temperature and mild crushing and temperature-controlled sieving, controllable low-temperature melting and purification, in-situ chain modification and performance enhancement, cooling, granulation and finished product testing; multimodal identification is achieved through near-infrared, Raman and X-ray fluorescence spectroscopy, which can distinguish different types of additives, significantly reduce impurity content, and meet the safety requirements for food contact and high-end products; through low-temperature crushing and low-temperature melting, thermal degradation is significantly inhibited, the molecular weight of recycled material is close to that of virgin material, and the molecular chain breakage is greatly reduced; through in-situ chain modification, toughening and stabilization system, the impact strength, tensile strength and aging resistance of recycled plastics are close to those of virgin material, and the mechanical properties and weather resistance are significantly restored, making it suitable for mid-to-high-end fields, no longer limited to low value-added products.