24 results about "Attenuated total reflection" patented technology

The invention discloses a disease risk assessment method and screening device based on a multi-group student physical collaborative digital network, and relates to the field of intelligent medical detection. In order to solve the defect that multi-omics-level system collaborative analysis and robust risk assessment are difficult to realize in the prior art, the technical scheme provided by the invention is as follows: acquiring a plasma sample, acquiring a spectral signal by adopting an attenuated total reflection Fourier transform infrared spectrum, and establishing a plasma spectrum digital information space; the method comprises the following steps: constructing a biological collaborative digital network containing four nodes of protein, lipid, saccharides and nucleic acid based on pathophysiology priori knowledge, and defining node strength, edge weight and network collaborative efficiency; a health baseline configuration file is established by using a health sample, a standardized deviation score of a to-be-tested sample is calculated, a comprehensive risk score is obtained, a disease screening result is output in combination with a machine learning model, and digital evaluation of multi-omics collaborative characteristics is realized. The method is suitable for non-invasive rapid screening and risk assessment work of neurodegenerative diseases and mental diseases.

The present invention provides a sample stage with a built-in pressure sensor for attenuated total reflectance (ATR) measurements, wherein a detachable plate can be smoothly attached and detached. The sample stage comprises: a stage surface member 4 having an opening 2; and a detachable plate 6 held by the stage surface member 4 so as to close the opening 2. Pressure sensors 8 are arranged on the stage surface member 4 at three locations along the edge of the opening 2, a sample is placed on the surface of the detachable plate 6, and three projections 18 are formed at positions corresponding to the pressure sensors 8 on the side surface of the plate or the rear surface of the plate. Each pressure sensor 8 is brought into a sensing state by placing the projections 18 of the detachable plate 6 on the pressure sensors 8 of the stage surface member 4, and each pressure sensor 8 is brought into a non-sensing state by placing the projections 18 on a portion 22A other than the pressure sensors among the edge of the opening 2, with the detachable plate 6 being rotated by a prescribed angle.

To provide an antiadhesive material having good handleability and improved long-term antiadhesive properties.SOLUTION: The present invention relates to an adhesion-preventing material comprising a fiber sheet and an oil agent attached to the fiber sheet, wherein the oil agent comprises liquid paraffin and a surfactant. In the present invention, the adhesion-preventing material preferably has a peak derived from an oil agent in the vicinity of a wave number of 2860cm-1 in analysis by Fourier-transform ultraviolet spectroscopy-total reflection measurement method. In the present invention, the surfactant preferably has intermediate water in which an exothermic peak based on low-temperature crystallization of water is observed at 0 °C or lower in a temperature rising process in differential scanning calorimetry (DSC) in a wet state.SELECTED DRAWING: None

An ATR apparatus includes a prism having a reflection surface, a holding unit holding a sample including a suspension on the reflection surface, and an adjustment unit adjusting a fluidal state of the sample held on the reflection surface. The adjustment unit adjusts the fluidal state of the sample to a first fluidal state in order to acquire a first detection result relating to the sample in the first fluidal state and adjusts the fluidal state of the sample to a second fluidal state in order to acquire a second detection result relating to the sample in the second fluidal state.

The invention relates to a method for testing the shear modulus of a polymer packaging material in a curing process, which comprises the following steps of: 1, obtaining polymer conversion rate data at different moments and clear curing process temperature parameters through attenuated total reflection Fourier infrared spectrum in-situ monitoring based on setting of curing process temperature parameters; step 2, based on the curing process temperature parameters determined in the step 1, obtaining associated data of shear modulus and time through a synchronous mechanical property test; and step 3, based on the conversion rate data in the step 1, the curing process temperature parameters and the shear modulus and time associated data in the step 2, obtaining corresponding polymer shear moduli under different conversion rates through multi-scale data fusion. The method has the beneficial effects that high synchronism and accuracy are achieved, full-period mechanical characterization is achieved, and a scientific basis is provided for internal stress prediction and demolding time determination in the composite material forming process.

The invention relates to the technical field of oil wastewater separation and trace testing, and discloses an infrared spectrum quantitative method for trace hexafluorophosphate in polylactic acid fiber, which comprises the following steps: firstly, pressing loose fiber into sheets, and carrying out infrared spectrum testing by adopting an attenuated total reflection mode to effectively enhance the acquisition intensity and stability of infrared signals; secondly, in a data processing stage, through accurately extracting a characteristic infrared signal of hexafluorophosphate and systematically determining an optimal baseline correction method of an internal standard peak and a characteristic peak and an integral range selection skill, on the basis of a relation between a characteristic peak area ratio and the concentration, the detection sensitivity of the method is improved; according to the method, a quantitative model conforming to the Lambert-Beer law is established, matrix interference can be eliminated to the maximum extent, the accuracy of a quantitative result is ensured, and the problem that trace hexafluorophosphate lower than 5% on the fiber surface is difficult to accurately and rapidly quantify by an existing infrared spectrum technology and the accuracy of a quantitative result is low is solved. And a standardized analysis process for effectively eliminating matrix interference is lacked.

This invention discloses a quality testing method for refined PLAH composite plasticizers. By integrating Raman spectroscopy-attenuated total reflectance infrared dual-spectral fusion, simultaneous thermorheological characterization, accelerated migration micro-model testing, and a multi-dimensional index model, this method overcomes the shortcomings of existing technologies that only detect chemical content, cannot reflect functional performance, and lack rapid evaluation capabilities. This method achieves integrated and rapid detection of molecular structure matching, phase stability, migration risk, and long-term performance of refined PLAH composite plasticizers, with a total testing cycle of ≤8 hours and a correlation between the test results and actual application performance ≥0.92. This method requires no complex pretreatment and combines the advantages of both destructive and non-destructive testing, making it suitable for online quality control in industrial production, warehousing acceptance, and application performance prediction. It provides key technical support for the optimization of the refining process and quality control of composite plasticizers for bio-based polylactic acid (PLA) materials.

The application discloses a terahertz time-domain attenuated total reflection method solvent water content detection system and method, relates to the online detection field of solvent water content by means of terahertz time-domain spectroscopy technology, and comprises a terahertz time-domain detection device for emitting a terahertz signal to an ATR sensor module, receiving a terahertz total reflection signal emitted from the ATR sensor module, and transmitting the terahertz total reflection signal to a data processing terminal; a first ATR sensor module for receiving a sample solvent to be detected and performing total reflection on the terahertz signal by means of the sample solvent to be detected; a second ATR sensor module for performing total reflection on the terahertz signal by means of a standard sample solvent; a sample solvent online liquid taking device for controlling the sample solvent to be detected to flow through the first ATR sensor module; and a data processing terminal for calculating the water content of the sample solvent to be detected according to the terahertz total reflection signal. The application can perform online nondestructive detection on the water content of a solvent.

This invention provides a pentaazole lead complex, its preparation method, and its application, relating to the field of laser-initiated ignition technology. The molecular formula of the pentaazole lead complex is Pb(N5)(N3), and its characterization is as follows: decomposition peak temperature: 120℃; characteristic wavenumbers detected by attenuated total reflectance infrared spectroscopy are: 3369.11, 3330.71, 3258.58, 3170.41, 1986.73, 1601.30, 1214.97 cm⁻¹. ‑1 The characteristic wavenumbers detected by Raman spectroscopy excited by 785 nm near-infrared laser are: 226.17, 573.48, 1184.74, 1342.18, and 1481.11 cm⁻¹. ‑1 Elemental analysis: PbN8: calcd N 35.10%, Found: N 35.15%. This invention discloses a novel pentazolium lead complex Pb(N5)(N3) and its preparation method. It has a low laser initiation threshold, is environmentally friendly, and experimentally determined to be successfully initiated at excitation energies of 3–100 mJ. The pentazolium lead complex described in this application does not contain ClO4. ‑ The pentazolium lead complex described in this application has higher energy than the conventional initiating explosive lead azide (Pb(N3)2), and can use a smaller amount of explosive under the same conditions.

The present application relates to the technical field of solution physicochemical test, and discloses a method for rapidly detecting nutrient content of synergistic high-nitrogen fertilizer, comprising the following steps: collecting undiluted original solution to construct an absorbance curve by attenuated total reflectance infrared spectroscopy, reading an initial transmittance voltage value, calculating a first-order time differential to extract a change rate parameter and adjusting a time window span in combination with a voltage value drift, calculating a second-order time differential and triggering filtering according to zero-crossing to correct the parameter and determine a slope mutation point value, and inputting the corrected parameter and the voltage value into an inversion relationship to calculate and output total nitrogen nutrient content, wherein the present application separates overlapping spectra by non-equilibrium dipole polarization time sequence difference, eliminates non-linear saturation, suppresses scattering interference of incompletely dissolved particles, and improves detection accuracy.

This ATR device is equipped with: a prism having a reflecting surface; a holding part that holds a sample containing a suspension on the reflecting surface; and an adjusting part that adjusts the flow state of the sample held on the reflecting surface. The adjusting part adjusts the flow state of the sample to a first flow state in order to acquire a first detection result relating to the sample in the first flow state, and adjusts the flow state of the sample to a second flow state in order to acquire a second detection result relating to the sample in the second flow state.

The present application relates to the technical field of road engineering, in particular to a desulfurization degree evaluation method of bio-desulfurized rubber powder for modified asphalt, which comprises Fourier infrared spectrum attenuated total reflection testing and EA element analysis testing on waste tire rubber powder and bio-desulfurized rubber powder, baseline calibration and smoothing processing on the transmittance spectrum, calculation of S-S bond and C-S bond correction peak area reduction rate, and calculation of S element content reduction rate, so as to calculate the desulfurization degree index DI value, which can quickly evaluate the desulfurization degree of bio-desulfurized rubber powder. The evaluation method and evaluation index proposed by the present application have the characteristics of short time consumption, convenient operation and high precision, can realize quick and accurate evaluation of the desulfurization degree of bio-desulfurized rubber powder in the screening stage of preparing desulfurized rubber powder modified asphalt materials, and can appropriately predict the physical properties of modified asphalt prepared by desulfurized rubber powder.

The invention relates to a method for measuring the molecular content of H2O, HDO and D2O in heavy water by using an attenuated total reflection infrared absorption spectrum, which comprises the following steps: assembling a device comprising a Fourier transform infrared spectrometer and an ATR (Attenuated Transform Resonance) component, enabling interference light to pass through a reflecting lens to a crystal, and reflecting to a detector after total reflection; preparing a series of initial concentration heavy water solution standard samples; standing or heating the standard sample to isotope exchange equilibrium, and calculating theoretical concentration; testing the standard sample to obtain the characteristic peak areas of 1640 cm <-1 > (H2O), 1200 cm <-1 > (D2O) and 2500 cm <-1 > (O-D), and making a standard curve; and testing a blind sample and substituting into the curve to obtain the content. According to the method, the problems that the O-H peak of the high-concentration water sample is saturated and the molecular morphology of HDO and D2O cannot be distinguished in the traditional infrared spectroscopy are solved, accurate quantification is realized, and a reliable molecular level detection means is provided for the fields of nuclear industry and the like.

The invention relates to the technical field of electrochemistry, and provides a reaction tank and system for a magnetic field electrochemical in-situ infrared spectrum test. The reaction tank for the magnetic field electrochemical in-situ infrared spectrum test comprises a reaction tank module, an attenuated total reflection crystal module, an electrode and gas-liquid circulation module and a magnet module, and the magnet module is configured to adjust the magnetic field intensity of a working electrode; the reaction tank main body is communicated with the opposite tank main body through an ion exchange membrane, and the main direction of ion migration on the ion exchange membrane is set to be parallel to the direction of a magnetic field applied by the magnet module. Through the magnetic field intensity adjustable magnet module, accurate and controllable application of a magnetic field on the surface of a catalyst is realized, the influence of magnetic field Lorentz force on a key ion transmission process can be eliminated under a double-cell structure, and optical path stability and magnetic field uniformity are optimized for in-situ infrared spectrum testing. Therefore, the research difficulty of electrocatalytic reaction in-situ infrared characterization in a magnetic field environment is reduced.

A non-specific reaction inhibitor, which is a copolymer comprising a constitutional unit A derived from 2-methacryloyloxyethyl phosphorylcholine and exhibiting a specific physical property X measured by Fourier transform infrared spectroscopy according to an attenuated total reflection method (ATR method), the non-specific reaction inhibitor being used in a use application of inhibiting a non-specific reaction when measuring an antibody or an antigen contained in a biological sample by mixing the copolymer with the biological sample.

The disclosure relates to optical modules for spectroscopy. In one arrangement, a transmission body (4) is provided that defines a sensing surface (10) configured to contact a sample (8) during a spectroscopic measurement of the sample (8) by attenuated total reflection using optical radiation (13). The sensing surface (10) comprises a meta-surface structure (16) configured to apply a wavelength-selective enhancement of absorption of the radiation (13) by the sample (8) during the measurement.

This ATR device is equipped with: a prism having a reflecting surface; a holding part that holds a sample containing a suspension on the reflecting surface; and an adjusting part that adjusts the flow

The invention provides a method and a device for identifying common plastics. The method comprises the following steps: measuring an intermediate infrared spectrum of a sample to be identified by using an attenuated total reflection Fourier transform infrared spectroscopy (ATR-FTIR); intercepting a characteristic wave band of the intermediate infrared spectrum, dividing the characteristic wave band into a plurality of equal-length sub-intervals, and performing two-dimensional reconstruction on the plurality of equal-length sub-intervals to obtain a two-dimensional data matrix; and inputting the two-dimensional data matrix into a pre-established two-dimensional convolutional neural network (CNN2D) model to obtain the plastic category of the sample to be identified. According to the invention, common plastic types can be quickly identified, secondary pollution is avoided, the efficiency is high, the speed is high, the identification accuracy rate is high, and the classification accuracy rate is high.

The purpose of the present invention is to provide a resin film which is less likely to undergo blocking even when stored in a roll-like form for a long period of time. Provided is a long resin film containing at least a fluororesin. On at least one surface of the resin film, the ratio A2 / A1 of the absorbance A2 of a second peak to the absorbance A1 of a first peak is 0.006 or less when measured by infrared spectroscopy attenuated total reflection method (IR-ATR), wherein the first peak is a peak of CF2 symmetric stretching vibration in the wavenumber range of 1130 cm-1 to 1180 cm-1 inclusive and the second peak is a maximum peak in the wavenumber range of 1700 cm-1 to 1750 cm-1 inclusive. The ratio N2／N1 of the absorbance N2 of a fourth peak to the absorbance N1 of a third peak is 0.05 to 0.5 inclusive when measured by nano-infrared spectroscopy (nano-IR), wherein the third peak is a peak of CF2 symmetric stretching vibration in the wavenumber range of 1130 cm-1 to 1180 cm-1 inclusive and the fourth peak is a maximum peak in the wavenumber range of 1600 cm-1 to 1800 cm-1 inclusive. The average value of water contact angles is 55° to 105° inclusive, and the variation coefficient of the water contact angles is 30% or less.

The present specification relates to an electrode comprising: an electrode laminate film including an active material and a binder that has a three-dimensional fiber network structure; and a current collector having at least one surface on which the electrode laminate film is disposed. In the electrode, a high-intensity region accounts for 4.5% to 48.0% of the total surface area. The high-intensity region is defined as a region in which the intensity (IB) of a peak appearing in a wavenumber range of 1190 cm-1 to 1260 cm-1 in an IR spectrum derived by analyzing a surface of the electrode using attenuated total reflectance Fourier transform infrared spectroscopy (ATR-FTIR) is 1.5 or higher. As a result, it is possible to provide an electrode in which structural features such as the fiber thickness, the fiber content, and the arrangement state of the fibrous binder on the electrode surface are controlled, and which thus has excellent appearance and resistance characteristics. In addition, it is possible to provide a secondary battery, a battery box, and an electrical device having excellent durability and lifespan properties as well as excellent output and rapid charging performance.

The present specification relates to an electrode comprising: an electrode mixture film including an electrode active material and a binder having a three-dimensional fiber network structure; and a current collector having the electrode mixture film disposed on at least one surface thereof, wherein the electrode has a low-intensity region of 15.0% or more on the basis of area with respect to the entire region on the surface thereof, and the low-intensity region is defined as a region in which IB, the intensity of a peak appearing in the range of wave numbers of 1190 cm-1 to 1260 cm-1, is 1.0 or less in an IR spectrum derived by analyzing the surface of the electrode by attenuated total reflection infrared spectroscopy (ATR-FTIR). Through this, structural characteristics such as fiber thickness, fiber amount, and arrangement state of the fibrous binder on the electrode surface are controlled, so that calendering processability is excellently performed, thereby providing an electrode having excellent appearance characteristics, and providing a secondary battery, a battery box, and an electric device having excellent durability, lifespan characteristics, output, and rapid charging performance.

The invention discloses an in-situ attenuated total reflection Fourier transform infrared spectrum detection method based on microwave heating, and belongs to the technical field of spectrum detection and analysis. According to the method, a design strategy that microwave heating and an infrared spectrum system are arranged separately is adopted, and a high-refractive-index infrared reflection crystal is used as a unique coupling detection area, so that real-time infrared spectrum monitoring of a reaction system is realized. The detection method disclosed by the invention is particularly suitable for in-situ monitoring of hydrogenation, cracking and conversion reaction of an oxygen-containing or unsaturated substituent compound on a furan ring or a benzene ring, and is compatible with microwave and catalytic reaction mechanism research, material interface reaction analysis and spectroscopic characterization of a biomass derivative conversion process; the method has the advantages of being accurate in temperature control, high in response speed, high in signal stability and good in data repeatability, dynamic spectrum tracking can be conducted on a complex reaction system, a traditional external heating detection mode is compatible, and the space matching degree and the time resolution of microwave field in-situ characterization are remarkably improved.

This invention relates to the field of ethanol detection technology in insulating oil based on attenuated total reflectance terahertz time-domain spectroscopy, aiming to solve the problems of complex pretreatment and long detection time in existing detection methods. The invention includes the following steps: S1, sample preparation; S2, constructing an attenuated total reflectance terahertz spectroscopy system including a terahertz time-domain spectroscopy detection module and an attenuated total reflectance (ATR) module, and acquiring spectral data of standard samples; S3, preprocessing and feature extraction of the acquired spectral data; S4, theoretical analysis of the ethanol terahertz response based on molecular dynamics simulations; S5, construction of an intelligent quantitative analysis combination model; S6, application of the detection under actual working conditions. This invention enables non-destructive and rapid detection of ethanol in insulating oil.

This invention provides a rapid soil analysis and classification method based on mid-infrared spectroscopy, comprising: S1 collecting and preprocessing soil samples; S2 acquiring mid-infrared attenuated total reflectance spectra based on the preprocessed samples to obtain mid-infrared spectral data; S3 preprocessing the mid-infrared spectral data to obtain preprocessed spectral data; S4 performing principal component analysis and hierarchical clustering analysis based on the preprocessed spectral data to obtain spatial heterogeneity analysis results of the soil spectra and classifying samples from different regions into multiple prior categories; S5 constructing and optimizing a classification model based on spectral features and prior categories to obtain a trained classification model; S6 inputting the soil sample to be tested into the trained classification model after processing according to S1 to S3 to obtain the category assignment of the soil sample, thus completing the rapid analysis and classification of the soil. This invention can achieve rapid and non-destructive analysis and accurate classification of soil samples, improving the efficiency and accuracy of soil spatial heterogeneity identification and classification.