59 results about "Uv vis absorbance" patented technology

The invention relates to the technical field of water pollution detection, in particular to a water quality pollution multi-dimensional analysis system which comprises the following steps: synchronously measuring an ultraviolet-visible absorption spectrum of a water sample to be detected and scattered light intensity in an orthogonal direction, and deducting spectrum baseline interference caused by suspended particulate matters in the water sample through a correction algorithm; the interferents in the water sample are selectively converted and degraded by applying a programmed potential to the inflowing water sample to be detected; the reverse pulse is periodically applied, so that the online regeneration function of the electrode is realized; analyzing the spectral data by adopting a multivariate correction algorithm, and calculating the concentration of the target pollutant; the calculation residual error of the multivariate correction algorithm is analyzed, new interference and system performance drift of current measurement are diagnosed, and a corresponding system state code is generated; and responding to the system state code, automatically starting and carrying out state checking and multi-point calibration on the instrument, and using a calibration result to update the analysis model. Through multi-dimensional perception and closed-loop operation, accuracy and reliability of water quality monitoring are guaranteed.

The invention provides a method for analyzing femtosecond laser-induced damage behaviors on the surface of a Zn-doped KDP crystal, and belongs to the technical field of engineering optics based on computer data processing. The method comprises the following steps: firstly, respectively analyzing the influence of the Zn doping amount on the band gap and electroacoustic coupling of the KDP crystal through an ultraviolet-visible absorption spectrum and a Brillouin light scattering spectrum; then constructing a one-dimensional model, respectively simulating the electron density, lattice temperature and time evolution of electron temperature on the surface of the Zn-doped KDP crystal under femtosecond laser irradiation through an electron density accumulation rate equation and a double-temperature model, and theoretically analyzing the influence of the Zn doping amount on the damage behavior of the surface of the KDP crystal. And a theoretical model for calculating the femtosecond laser induced damage threshold is established, so that the optimal doping amount of Zn is determined in a lossless manner. A real sample is not contacted, so that the sample utilization rate is improved; the simulation process is more stable and controllable, and the data repeatability is high; and the research period can be shortened, and optimal doping amount screening is accelerated.

The invention provides an electrolyte treatment system, and relates to the technical field of electrolyte treatment. The electrolyte treatment system comprises a carrier, the carrier is used for carrying a device, a to-be-detected sample tank, a powder storage tank and a liquid storage tank, the powder storage tank is used for storing solid raw materials, the liquid storage tank is used for storing liquid raw materials, and the to-be-detected sample tank is used for storing to-be-detected electrolyte; the carrier, the preparation device and the detection device are arranged around the transfer device in a surrounding manner; wherein the transfer device is configured to be capable of conveying the appliance and the powder storage tank to the preparation device, the solid raw materials in the powder storage tank are injected into the appliance in the preparation device, and the transfer device can be used for injecting the liquid raw materials in the liquid storage tank into the appliance so as to prepare the electrolyte to be detected; the transfer device is configured to be capable of conveying a to-be-detected sample tank or appliance to the detection device, and the detection device can detect at least one of the conductivity, solvation energy and ultraviolet-visible absorption spectrum of the to-be-detected electrolyte.

The invention discloses a spectrum method water quality on-line monitoring method, system and device based on edge calculation, a medium and a product, and relates to the field of water quality monitoring, the method comprises the following steps: training a one-dimensional convolutional neural network model according to a spectrum data set and a corresponding water quality parameter label, and generating a lightweight AI reasoning model adapted to an edge device; the spectral data set comprises an ultraviolet-visible absorption spectrum of the water body; the edge device comprises a microcontroller, an ultraviolet-visible full spectrum sensor and a LoRa communication unit; burning a weight file of the lightweight AI inference model to the microcontroller, and locally analyzing water quality parameters in real time according to the lightweight AI inference model to determine a water quality monitoring result; the water quality monitoring result is uploaded to a cloud management platform through the LoRa communication unit, so that visual monitoring is achieved, the monitoring precision is ensured, meanwhile, the data transmission amount is greatly reduced, and then real-time monitoring in a low-power-consumption environment is achieved.

The invention belongs to the field of soil dissolved organic matter analysis, and provides a multispectral-based DOM detection and reclamation influence evaluation method, which comprises the following steps: step 1, collecting dry farmland soil samples of different reclamation years, and obtaining soil column samples of a plough layer, a plow pan and subsoil; 2, extracting, centrifuging and filtering the soil sample to obtain a DOM solution; 3, detecting the DOM solution by adopting an ultraviolet-visible absorption spectrum; step 4, adopting a three-dimensional fluorescence spectrum and combining parallel factor analysis to obtain fluorescence components and source characteristics of the DOM solution; step 5, analyzing molecular composition and characteristic parameters of the DOM solution by adopting solid-phase extraction in combination with Fourier transform ion cyclotron resonance mass spectrometry; and step 6, based on the detection data in the steps 3-5, evaluating the influence of reclamation years on the composition, structure and degradation characteristics of the DOM. According to the method, multi-dimensional detection of soil DOM is realized through a multi-spectrum and mass spectrum combined technology, and DOM is comprehensively analyzed from a macrostructure to molecular composition.

An inkjet ink contains a quinacridone pigment, a resin, and an aqueous medium. A 50-fold dilution of a supernatant obtained by centrifugating the inkjet ink at 1,050,000 G for 3 hours has a phosphorous concentration of at least 1.0 ppm and no greater than 6.0 ppm. On an ultraviolet-visible absorption spectrum of the supernatant, a first peak appears at a first absorbance of at least 0.16 and no greater than 0.40. The first peak is a maximum peak in a wavelength range of the ultraviolet-visible absorption spectrum of at least 300 nm and no greater than 340 nm. On the ultraviolet-visible absorption spectrum of the supernatant, a second peak appears at a second absorbance of at least 0.15 and no greater than 0.80. The second peak is a maximum peak in a wavelength range of the ultraviolet-visible absorption spectrum of at least 400 nm and no greater than 490 nm.

Ultraviolet (UV) absorbing inks and films for surfaces such as glass and / or plastic are provided that include patterns visible to avian eyes, but invisible to a human at least ten feet away. Such invention is aimed at reducing the number of window strikes that result in bird deaths. A formulation may include a binder, a carrier. A formulation may include a base configured to dissolve and solubilize the binder such that it can be applied to the carrier. A formulation may include at least one of an ultraviolet (UV) / visible (VIS) absorbing (UAC) component and a UV / VIS reflective (URC) component.

A system for the synthesis of zinc oxide, iron oxide and manganese oxide nanoparticles by means of green synthesis using pea shell biomass extract as a reducing agent, wherein the nanoparticles have sizes in the range of 40-120 nm, which were confirmed by UV-Vis absorption, FTIR and FESEM.

This invention discloses a rapid monitoring method for comprehensive spectral ecological parameters of seawater based on a cross-neural network. The method includes: receiving the UV-Vis absorption spectrum and three-dimensional fluorescence spectrum of a standard solution sample as initial spectral data; preprocessing the initial spectral data to obtain a comprehensive spectral dataset; establishing a cross-neural network model, inputting the comprehensive spectral dataset into the model, and outputting predicted values ​​of multiple seawater ecological parameter components by fusing spectral feature matrices and cross-referencing information from the UV-Vis absorption spectrum and three-dimensional fluorescence spectrum, and adjusting the network weights by comparing these predicted values ​​with the actual values; stopping training once the model accuracy meets the target, fixing the network weights, and then inputting the preprocessed spectral data of the seawater sample to be tested into the trained cross-neural network model to output the content of the ecological parameter components. This method can simultaneously measure multiple ecological parameters, improving monitoring efficiency and accuracy, and providing a key technology for the development of multi-parameter sensors for seawater quality.

The present invention provides a dry film that reduces color unevenness in a display when a light-emitting element is lit, a light-emitting electronic component using the film, and a method for manufacturing the same. [Solution] A dry film 1a for pressing onto the surface on which a plurality of light-emitting elements 21 to 23 are arranged on a substrate 20, comprising at least a black curable resin layer 10 for shielding light between the plurality of light-emitting elements, wherein a specific relationship holds between the average absorbance between wavelengths of 430 to 480 nm, the average absorbance between wavelengths of 500 to 550 nm, and the average absorbance between wavelengths of 600 to 650 nm of the ultraviolet-visible absorption spectrum obtained by measuring the black resin layer after curing the black curable resin layer.

The application discloses an indicator for indicating Fe 3+ in an acidic medium and a preparation method and application thereof. The indicator contains a salicylic acid structure in the structure, when Fe 3+ is contained in galvanized steel, Fe 3+ can be complexed with the -COOH group and -OH group in the indicator, the solution changes from colorless to purple red, naked eye identification can be realized, meanwhile, ultraviolet-visible absorption spectrum is enhanced, thereby realizing qualitative and quantitative detection of Fe 3+ . In addition, the indicator provided by the application has strong sensitivity in recognizing Fe 3+ , can effectively realize qualitative and quantitative detection of Fe 3+ , and is not influenced by other analytes such as Na + , Ba 2+ , Hg 2+ , Cu 2+ , Ni 2+ , Zn 2+ , Mg 2+ , Ca 2+ , Cd 2+ , Cr 3+ and the like, and has excellent selectivity.

This invention provides a method for analyzing the femtosecond laser-induced damage behavior of Zn-doped KDP crystal surfaces, belonging to the field of engineering optics technology based on computer data processing. First, the effects of Zn doping concentration on the bandgap and electroacoustic coupling of the KDP crystal are analyzed using UV-Vis absorption spectroscopy and Brillouin scattering spectroscopy, respectively. Then, a one-dimensional model is constructed, and the time evolution of electron density, lattice temperature, and electron temperature on the Zn-doped KDP crystal surface under femtosecond laser irradiation is simulated using a rate equation for electron density accumulation and a two-temperature model. The influence of Zn doping concentration on the damage behavior of the KDP crystal surface is theoretically analyzed, and a theoretical model for calculating the femtosecond laser-induced damage threshold is established, thus non-destructively determining the optimal Zn doping concentration. This invention avoids contact with real samples, improving sample utilization; the simulation process is more stable and controllable with high data repeatability; it can also shorten the research cycle and accelerate the selection of the optimal doping concentration.

The invention belongs to the technical field of nano materials, and discloses a preparation method of an Au nano material with a layered hybrid superlattice structure. According to the method, a coordination confinement synthesis strategy is adopted, 4-mercaptobenzoic acid is taken as a structure-directing agent, and the organic-inorganic alternating layered superlattice structure is successfully prepared under the condition of CO weak reduction by utilizing a strong coordination bond formed by sulfydryl of 4-mercaptobenzoic acid and gold and a pi-pi conjugate synergistic effect of a benzene ring and combining a soft template confinement effect of octadecylamine. The superlattice material has a long-range disordered amorphous structure and an adjustable interlayer spacing (2.9 to 4.7 nm), and shows the white light emission characteristics of wide-spectrum ultraviolet-visible absorption (250 to 600 nm) and adjustable color temperature (3200 to 6500 K). According to the invention, a quantitative structure-function relationship of interlayer spacing-ligand metal interaction-optical performance is established, effective regulation and control of intersystem crossing process and phosphorescence lifetime from microsecond to millisecond magnitude are realized, and an innovative solution is provided for solving the problem of metal-organic layer interface compatibility; and an important material platform and theoretical support are provided for developing a novel flexible photoelectric device.

The application discloses a method for identifying Fe by using 2-amino-5-substituted-1, 3, 4-oxadiazole. 3+ The method comprises the following steps: firstly, preparing a 2-amino-5-substituted-1, 3, 4-oxadiazole solution to be detected; secondly, adding a metal cation solution into the solution to be detected; and thirdly, identifying Fe by naked eye observation and ultraviolet-visible absorption spectrum. 3+ The method has good selectivity for Fe 3+ , is not interfered by other ions, and can better identify and detect Fe in the environment. 3+ ​

The invention relates to the technical field of nuclear material analysis, in particular to a plutonium solution specific activity determination method and application, and the plutonium solution specific activity determination method comprises the following steps: taking a plutonium solution with known specific activity A1 as a standard solution, determining the liquid flash counting rate of the standard solution, and recording the liquid flash counting rate as C1; obtaining a second-order conductance spectrum of the standard solution by using an ultraviolet-visible absorption spectrum method, determining the peak area of a characteristic absorption peak of tetravalent plutonium in the second-order conductance spectrum of the standard solution, and recording the peak area as S1; measuring the liquid flash counting rate of the to-be-measured solution, and recording the liquid flash counting rate as C2; obtaining a second-order conductance spectrum of the to-be-detected solution by using an ultraviolet-visible absorption spectrometry, determining the peak area of a characteristic absorption peak of tetravalent plutonium in the second-order conductance spectrum of the to-be-detected solution, and recording the peak area as S2; and calculating the specific activity A2 of the solution to be detected according to the following formula. According to the method, liquid scintillation counting and ultraviolet-visible spectrophotometry are combined, so that combination of activity response and concentration response is realized, and acquisition of isotope composition of a plutonium solution to be detected and complex sample pretreatment are not needed.

The invention relates to the technical field of water quality monitoring, in particular to a DOC monitoring method and device, a medium and a product. Comprising the following steps: collecting an ultraviolet-visible absorption spectrum of a water sample to be detected; a spectral boundary wavelength is determined, the ultraviolet-visible absorption spectrum is divided into a first wave band and a second wave band based on the spectral boundary wavelength, the spectral characteristics of the first wave band are associated with the contribution of the macromolecular DOC, and the spectral characteristics of the second wave band are associated with the contribution of the micromolecular DOC; dividing the ultraviolet-visible absorption spectrum on the basis of the spectrum boundary wavelength, and respectively and quantitatively obtaining the concentration of the small-molecular DOC and the concentration of the large-molecular DOC; the macromolecular DOC concentration is used for regulating and controlling ozone addition, and the micromolecular DOC concentration is used for regulating and controlling operation of the intelligent water affair system. The technical problems that a water treatment process in related technologies cannot be accurately regulated and controlled according to water quality composition changes, the operation cost is high, the generation risk of disinfection by-products is large, and the process efficiency is reduced can be at least solved.

The application relates to a solar cell and a preparation method thereof, a photovoltaic module, a power generation device and a power utilization device. The solar cell comprises a first electrode, a functional layer, a photoelectric conversion layer and a second electrode which are stacked along the thickness direction of the solar cell. The functional layer comprises an organic polymer, and the organic polymer comprises a hole transport group. The functional layer satisfies A2<=A1 and A2>=0.8*A1, A1 represents the maximum absorption peak of the functional layer in the wavelength range of 200-400 nm in the ultraviolet-visible absorption spectrum, and A2 represents the maximum absorption peak of the functional layer after being soaked in chlorobenzene for 5 min in the wavelength range of 200-400 nm in the ultraviolet-visible absorption spectrum. The photoelectric conversion efficiency of the solar cell can be further improved.

The present application relates to a kind of for detecting colloidal semiconductor quantum dot spectroelectrochemical device and method.The device combines electrochemical workstation and spectroscopic detection system, for real-time monitoring the structural change of molecule and material in electrochemical reaction process.The core technology includes the accurate control of the redox state of sample, and obtains key molecular information by various spectroscopic analysis means (such as ultraviolet-visible absorption spectrum, infrared spectrum, raman spectrum etc.).Device design adopts modular structure, includes reference electrode, counter electrode and working electrode, to ensure the stability of reaction and the reliability of data.The method is suitable for the identification of electrocatalyst active site, the electronic structure regulation of material, the research of interface chemical reaction mechanism and the like.

The invention relates to the technical field of environment monitoring and intelligent sensing, and discloses a seawater sample residual chlorine online monitoring method combined with intelligent sensing. The method comprises the following steps: synchronously acquiring multi-source heterogeneous data through a multi-mode electrochemical sensing array and a micro ultraviolet-visible absorption spectrum module, carrying out feature decoupling by utilizing a deep auto-encoder and an independent component analysis joint model, extracting a free residual chlorine exclusive component, and correcting salinity, turbidity and organic matter interference in combination with a dynamic environment compensation model, so as to obtain the free residual chlorine content. And finally, high-selectivity and high-sensitivity real-time concentration calculation is realized. The device has adaptive signal decoupling and on-line model fine tuning capabilities, inhibits cross interference and long-term drift, realizes reagent-free and continuous on-line monitoring, and improves the accuracy and reliability of residual chlorine detection in the marine environment.

The invention discloses a ratio-type fluorescent probe based on dual-emission europium-containing carbon dots, a preparation method and application of the ratio-type fluorescent probe in detection of tetracycline antibiotics, and belongs to the technical field of fluorescent probes. Histidine and europium nitrate are used as precursors, the fluorescent powder is obtained through one-step synthesis with an ethanol-water solvothermal method, and the fluorescent powder has blue fluorescence located at 440 nm and Eu < 3 + > characteristic red fluorescence located at 615 nm. When the probe acts with oxytetracycline, the oxytetracycline as an antenna ligand and Eu < 3 + > are subjected to efficient energy transfer, so that red fluorescence at 615 nm is remarkably enhanced, and blue fluorescence at 440 nm is kept stable, thereby realizing ratio-dependent fluorescence response along with visual luminescence color change from blue to red luminescence. According to the method, fluorescence of the probe is combined with ultraviolet-visible absorption spectrum data, a multi-signal sensing platform is constructed by utilizing linear discriminant analysis, and accurate identification and quantitative analysis of various tetracycline antibiotics are successfully realized.

The invention discloses an in-situ ultraviolet-visible absorption spectrum detection system and detection method, and belongs to the technical field of instrument analysis and detection, the in-situ ultraviolet-visible absorption spectrum detection system comprises an electrochemical control module and an optical detection module; the electrochemical control module comprises an electrochemical workstation, an electrochemical reaction system and a computer, the electrochemical reaction system comprises an opaque working electrode, the electrochemical workstation is electrically connected with the opaque working electrode, and the electrochemical workstation is in bidirectional signal connection with the computer; the optical detection module comprises a Y-shaped optical fiber and a spectrograph, the incident end of the Y-shaped optical fiber is connected with the ultraviolet-visible light source, and the reflecting end of the Y-shaped optical fiber is in signal connection with the spectrograph. Light paths of incident light and reflected light are coaxial through the spatially coupled Y-shaped optical fiber, light path focusing is achieved through the optical fiber bundle, it is ensured that the light beam vertically enters the surface of the opaque working electrode, reflected signals are collected at high precision, and the influence of the opaque property of an electrode material on absorption spectrum testing is effectively eliminated.

The invention provides an immunosensor which takes Eu-TCPB-MOF as an energy donor and is used for NSE detection. Eu-TCPB-MOF is used as an energy donor, GO-PEI / Au is used as an energy receptor, energy can be effectively transferred due to spectrum overlapping between an ECL emission spectrum of the Eu-TCPB-MOF and an ultraviolet-visible absorption spectrum of GO-PEI / Au, so that the ECL signal intensity of the Eu-TCPB-MOF is inhibited under the RET effect, and after carboxyl is activated by 2-(N-morpholinyl) ethanesulfonic acid, the Eu-TCPB-MOF can be converted into the Eu-TCPB-MOF in the Eu-TCPB-MOF in the Eu-TCPB-MOF. Eu-TCPB-MOF is modified to the surface of a glassy carbon electrode to serve as a signal substrate, and the amount of NSE is calculated through ECL signal intensity change.

Provided are a non-aqueous electrolyte solution capable of controlling the amount of impurities, a composition, an electricity storage element, a method for producing a non-aqueous electrolyte solution, and a method for producing an electricity storage element. The nonaqueous electrolyte solution contains hexafluorophosphate ions, the integral value of a peak derived from difluorophosphate ions in a phosphorus 31 nuclear magnetic resonance spectrum is less than 0.1% with respect to the integral value of a peak derived from hexafluorophosphate ions, and the absorbance at a wavelength of 300 nm in an ultraviolet-visible absorption spectrum measured at an optical path length of 10 mm and 25 DEG C + / -2 DEG C is 2 or more. This method for producing a non-aqueous electrolyte solution comprises: a preparation step for preparing a first non-aqueous electrolyte solution containing hexafluorophosphate ions; and a treatment step in which the first nonaqueous electrolyte solution is brought into contact with an ion-conductive oxide-based solid electrolyte to obtain a second nonaqueous electrolyte solution.

The invention discloses a diazo naphthoquinone type photoinitiator with a polypyrrole unit, and belongs to the field of near ultraviolet photoinitiators. According to the present invention, the polypyrrole unit-diazo naphthoquinone type photoinitiator is synthesized through the simple and efficient method, the ultraviolet visible absorption peak value of the photoinitiator is 355-450 nm, the half peak width is about 50-58 nm, the near ultraviolet absorption requirement is completely met, and the near ultraviolet light initiator can initiate the monomer polymerization under the near ultraviolet light irradiation so as to be used as the photocuring material.

The invention relates to an antibiotic identification method based on absorption and fluorescence spectrum internal correlation. The method comprises the following steps: firstly, carrying out scattering removal and internal filtering effect correction on original three-dimensional fluorescence excitation-emission matrix data; then, accurately measuring an ultraviolet-visible absorption spectrum of a water sample, constructing an absorption corrected fluorescence spectrum model, and carrying out deep fusion and enhancement on the corrected fluorescence spectrum by taking the absorption characteristic as a weight, so as to effectively highlight and enhance a real fluorescence fingerprint closely related to the absorption characteristic of the antibiotic; and finally, carrying out singular value decomposition on the enhanced fluorescence spectrum data, and carrying out similarity matching and threshold judgment on the enhanced fluorescence spectrum data and a known antibiotic standard characteristic database to realize accurate qualitative recognition and high-precision quantitative analysis on different antibiotics in the water sample. According to the method, the real spectrum fingerprints of the antibiotics can be recovered to the maximum extent, and the sensitivity, accuracy and reliability of antibiotic pollution detection are remarkably improved.

The invention provides a water quality detection method, device and equipment based on an ultraviolet-visible absorption spectrum, and relates to the technical field of water quality detection. The method comprises the following steps: performing ultraviolet-visible absorption spectrum measurement on a water sample to be detected to obtain initial absorbance data; extracting target absorbance data of the initial absorbance data in a preset wavelength interval; wherein the target absorbance data is turbidity absorbance data of the suspended matter; determining an absorbance correction value according to the target absorbance data; correcting the initial absorbance data according to the absorbance correction value; and carrying out inversion on the corrected initial absorbance data to obtain a water quality detection result of the water sample to be detected. The turbidity influence in the ultraviolet visible absorption spectrum can be effectively removed, the accuracy of measured data is ensured, and the accuracy of a water quality detection result is further improved.

One aspect of the present disclosure provides a solid electrolyte that contains an alkali metal element, a non-metal element M and a halogen element X as constituent elements, and that has a band gap of 1.47 eV or more as calculated from an ultraviolet−visible absorption spectrum.

The present application relates to a solar cell and a preparation method therefor, and a photovoltaic module, a power generation device, and an electric device. The solar cell comprises a first electrode, a functional layer, a photoelectric conversion layer and a second electrode which are stacked in the thickness direction of the solar cell. The functional layer comprises an organic polymer, and the organic polymer comprises a hole transport group, wherein the functional layer satisfies the following condition: A2 is less than or equal to A1 and greater than or equal to 0.8 times A1, where A1 represents the maximum absorption peak of the functional layer in a wavelength range of 200 nm to 400 nm of an ultraviolet-visible absorption spectrum, and A2 represents the maximum absorption peak of the functional layer in the wavelength range of 200 nm to 400 nm of the ultraviolet-visible absorption spectrum after the functional layer is soaked in chlorobenzene for 5 min. In the present application, the photoelectric conversion efficiency of the solar cell can be further improved.

The invention provides a cultural relic pigment damage evaluation method which can be applied to the technical field of cultural relic protection. The damage evaluation method comprises the following steps: obtaining chromatic aberration and ultraviolet-visible absorption spectra of a cultural relic pigment sample under a plurality of different exposure durations; determining a plurality of characteristic wavebands related to damage according to the second derivatives of the respective ultraviolet-visible absorption spectra of the plurality of different exposure durations; obtaining an evaluation index of cultural relic pigment damage by utilizing respective chromatic aberration of a plurality of different exposure durations and a plurality of characteristic wavebands related to the damage; and performing damage evaluation on the cultural relic pigment according to the cultural relic pigment damage evaluation index.

Ultraviolet (UV) absorbing inks and films for surfaces such as glass and / or plastic are provided that include patterns visible to avian eyes, but invisible to a human at least ten feet away. Such invention is aimed at reducing the number of window strikes that result in bird deaths. A formulation may include a binder, a carrier. A formulation may include a base configured to dissolve and solubilize the binder such that it can be applied to the carrier. A formulation may include at least one of an ultraviolet (UV) / visible (VIS) absorbing (UAC) component and a UV / VIS reflective (URC) component.