58 results about "Attenuated total reflection" patented technology

To provide polyimide as an insulation material for preparing a printed circuit board.SOLUTION: Polyimide includes one or a plurality of repeating units derived from dianhydride, and one or a plurality of repeating units derived from diamine. Infrared absorption spectrum of the polyimide obtained through Fourier transform infrared spectroscopy (FTIR) using attenuated total reflection (ATR) has a characteristic peak A of 1,753 cm-1 to 1,803 cm-1, a characteristic peak B of 1,635 cm-1 to 1,752 cm-1, and a characteristic peak C of 1,160 cm-1 to 1,170 cm-1, the characteristic peak A has a characteristic peak area a, the characteristic peak B has a characteristic peak area b, the characteristic peak C has a characteristic peak area c, b / a is 25.00 or less, and c / b is 0.3000 or more.SELECTED DRAWING: None

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 invention provides a stone analysis method based on attenuated total reflection Fourier transform infrared spectroscopy. The stone analysis method comprises the following steps: S1, placing and fixing a stone sample to be detected; s2, acquiring an infrared light signal and converting the infrared light signal into original spectral data; s3, processing the original spectrum data to obtain a corrected spectrum; s4, taking the correction spectrum as input, obtaining a preliminary prediction category by using a partial least square discriminant analysis algorithm, and calculating a feature importance index of each wavenumber at the same time; s5, according to the feature importance index, using a random forest algorithm to obtain a secondary prediction category; and combining the accuracy rate of the partial least square discriminant analysis model and the accuracy rate of the random forest model to obtain a final prediction category. According to the method, an attenuated total reflection Fourier transform infrared spectroscopy (ATR-FTIR) technology is taken as a core, and an innovative thought of'pretreatment-free sample treatment + multi-algorithm collaborative analysis' is combined, so that a complete stone analysis process from sample fixation to clinical report output is constructed.

The invention discloses a method for rapidly identifying the type of yellow spots on the surface of a cigarette by using an infrared spectrum, and relates to the field of tobacco and cigarette products, and the method comprises the following steps: cutting a cigarette paper sample with yellow spots from cigarette paper of a yellow spot cigarette as a yellow spot sample; a cigarette paper sample without yellow spots is cut from the blank cigarette paper outside the yellow spot area to serve as an out-spot cigarette paper sample; the method comprises the following steps: respectively placing a yellow spot sample and an out-spot cigarette paper sample in an ATR part of an attenuated total reflection infrared spectrometer, collecting ATR-FTIR spectral data of the samples, and calculating an A value; comparing the A value of the macular sample and the A value of the out-of-spot cigarette paper sample with a database, performing auxiliary judgment by combining with the characteristic peak form, and judging the type of the macular according to a comparison result.

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

To provide an exterior material for power storage device which can secure the excellent lamination strength under both of a room-temperature environment and a high-temperature environment, and has the excellently deep-drawing moldability, and a power storage device using the same.SOLUTION: An exterior material for power storage device is made of a laminate that includes at least a substrate layer 11, a first adhesive layer 12a, a barrier layer 13, a second adhesive layer 12b and a sealant layer 16 in this order. When the substrate layer is removed, the first adhesive layer is exposed, and measurement is performed with the attenuated total reflection of the Fourier transformation infrared spectroscopic analysis method from the outermost surface side of the exposed adhesive layer, a transmission factor T0 of a baseline, a minimum value T1 of the transmission factor detected within a range from 2100 cm-1 to 2400 cm-1, and a minimum value T2 of the transmission factor detected within a range from 1670 cm-1 to 1700 cm-1 satisfy the relationship of 0.06≤(T0-T1) / (T0-T2)≤0.4.SELECTED DRAWING: Figure 1

A film (1) includes hollow particles (10) and a binder (20). The hollow particles are made of a material having a refractive index of 1.15 to 2.70. The binder (20) is formed of at least a polysilsesquioxane and binds the hollow particles (10). The film (1) satisfies at least one of requirements Ib / Ia≥0.7 and Ib / Ic≥0.3. Ia is an absorbance derived from a hydrocarbon group not directly bonded to a silicon atom, the absorbance being determined by attenuated total reflection using a Fourier transform infrared spectrophotometer. Ib is an absorbance derived from a bond between a silicon atom and a non-reactive functional group. Ic is an absorbance derived from a bond between a silicon atom and a hydroxy group.

The invention provides a dispersant, a dispersion liquid, and a preparation method and application thereof. The dispersant comprises a copolymer containing a nonionic hydrophilic group and a long-chain hydrophobic group or a derivative thereof, an infrared absorption spectrum of the dispersant obtained by an attenuated total reflection method through Fourier transform infrared spectroscopy has an absorption peak at 1725-1740 cm <-1 >, the absorption peak exists at 2840-2960 cm <-1 >, and the peak width of the absorption peak at 2840-2960 cm <-1 > is 90-500 cm <-1 >; the dispersing agent is prepared from the following raw materials: an acrylic monomer, a long-chain acrylate monomer, an acrylamide monomer and a nonionic hydrophilic monomer. Dispersion liquid containing the dispersing agent provided by the invention has a good dispersion effect on polymer microsphere powder, diaphragm coating slurry prepared from the dispersion liquid has excellent stability, and a battery diaphragm prepared from the diaphragm coating slurry is low in air permeability increment.

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 discloses a crude oil and fuel oil identification method based on non-measurement multi-dimensional scale transformation analysis, and belongs to the technical field of oil product detection. The invention discloses a rapid and effective crude oil and fuel oil attribute identification and screening method based on a crude oil and fuel oil fingerprint database by adopting an infrared spectrum technology. The method comprises the following steps: by taking Fourier transform infrared spectrum and attenuated total reflection as data acquisition means, extracting 19 infrared absorption spectrum characteristic quantities and 3 background spectrum data on the basis of analyzing two aspects of statistical theory and relation between chemical bonds and infrared absorption characteristics on the characteristic quantities; constructing a crude oil and fuel oil infrared fingerprint database of which the infrared absorption spectrum characteristic quantity is fingerprint characteristics; and commodity attributes of the crude oil and the fuel oil are analyzed and identified according to NMDS. Through practical verification, the method can effectively identify the crude oil and the normal fuel oil, and can be used for rapid screening of commodity attribute identification of the crude oil and the fuel oil.

A film (1) includes hollow particles (10) and a binder (20). The hollow particles are made of a material having a refractive index of 1.15 to 2.70. The binder (20) is formed of at least a polysilsesquioxane and binds the hollow particles (10). The film (1) satisfies at least one of requirements Ib / Ia≥0.7 and Ib / Ic≥0.3. Ia is an absorbance derived from a hydrocarbon group not directly bonded to a silicon atom, the absorbance being determined by attenuated total reflection using a Fourier transform infrared spectrophotometer. Ib is an absorbance derived from a bond between a silicon atom and a non-reactive functional group. Ic is an absorbance derived from a bond between a silicon atom and a hydroxy group.

The present invention relates to a non-specific reaction inhibitor which has a constituent unit (A) derived from 2-methacryloyloxyethyl phosphorylcholine and exhibits a copolymer having a specific physical property (X) as measured by Fourier transform infrared spectroscopy by attenuated total reflection measurement (ATR method). And a non-specific reaction inhibitor for use in inhibiting a non-specific reaction when measuring an antibody or antigen contained in a biological sample by mixing the copolymer with the biological sample.

This document relates to various features of a physical probe tip, such as an ATR probe tip, used in an optical system, such as can employ an ATR probe. The probe tip can be used for touching to a location of target tissue (or other sample) for illuminating the location of target tissue and measuring an absorption or other response signal that can be acquired in response to illumination of the target tissue by the illumination signal. The response signal can include mid-infrared spectral components that can be measured and compared against a reference template or against a machine-learning statistical learning model that can be trained based on similar spectra.

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 discloses a rapid screening method for attribute identification of crude oil and fuel oil, and belongs to the technical field of petroleum product detection. The method comprises the following steps of: extracting 23 infrared absorption spectrum characteristic quantities and 3 background ranges on the basis of taking Fourier transform infrared spectrum and attenuated total reflection as data acquisition means and combining chemometrics and characteristic chemical bond infrared absorption spectrum, and constructing a crude oil and fuel oil infrared fingerprint database with the infrared absorption spectrum characteristic quantities as fingerprint characteristics; on the basis of solving a similarity matrix after performing standardized conversion on infrared fingerprint data, CLUSTER clustering analysis is adopted to perform multivariate correlation analysis on infrared fingerprints of crude oil and fuel oil and an infrared fingerprint database, and the method for identifying the commodity attributes of the crude oil and fuel oil according to the CLUSTER clustering analysis is realized. Experiments prove that the method can effectively identify the crude oil and the normal fuel oil, and can be used for rapid screening of commodity attribute identification of the crude oil and the fuel oil.

System for simultaneous measurement Raman and mid-infrared absorption signals from a sample, the system comprising an ATR crystal adapted for holding a sample thereon, at least one Raman excitation light source for Raman excitation, at least one FTIR excitation light source for FTIR excitation, at least one photodetector configured for collecting signals with a wavelength comprised at least in one of the IR spectrum or the Raman spectrum, a wavelength-dispersive device, such as a spectrometer, for collecting Raman signals, an excitation lens, and collection optics comprising a first collection lens.

The present invention provides a polyimide comprising a repeating unit derived from a dianhydride and a repeating unit derived from a diamine, in which an infrared absorption spectrum of the polyimide obtained by an attenuated total reflection method by Fourier transform infrared spectroscopy has a characteristic peak A at 1753 cm <-1 > to 1803 cm <-1 >, a characteristic peak B at 1635 cm <-1 > to 1752 cm <-1 >, and a characteristic peak C at 1635 cm <-1 > to 1752 cm <-1 >. The characteristic peak A has a characteristic peak area a, the characteristic peak B has a characteristic peak area b, the characteristic peak C has a characteristic peak area c, b / a is not more than 25.00, and c / b is not less than 0.3000.

To provide an exterior material for power storage device which can secure the excellent lamination strength under both of a room-temperature environment and a high-temperature environment, and has the excellently deep-drawing moldability, and a power storage device using the same.SOLUTION: An exterior material for power storage device is made of a laminate that includes at least a substrate layer 11, a first adhesive layer 12a, a barrier layer 13, a second adhesive layer 12b and a sealant layer 16 in this order. When the substrate layer is removed, the first adhesive layer is exposed, and measurement is performed with the attenuated total reflection of the Fourier transformation infrared spectroscopic analysis method from the outermost surface side of the exposed adhesive layer, a transmission factor T0 of a baseline, a minimum value T1 of the transmission factor detected within a range from 2100 cm-1 to 2400 cm-1, and a minimum value T2 of the transmission factor detected within a range from 1670 cm-1 to 1700 cm-1 satisfy the relationship of 0.06≤(T0-T1) / (T0-T2)≤0.4.SELECTED DRAWING: Figure 1

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.

The invention discloses a water body COD (Chemical Oxygen Demand) detection method based on a terahertz time-domain attenuated total reflection spectrum. The method comprises the steps of standard water sample preparation, standard spectrum acquisition, spectrum pretreatment and modeling, to-be-detected water sample detection and result calculation. A terahertz time-domain spectroscopy system collects a spectrum in an attenuated total reflection mode, and a COD quantitative analysis and prediction model is established. Full-process automatic detection is achieved, the detection repeatability error is smaller than 3%, the detection time of a single sample does not exceed 5 minutes, the problems of interference of chloride ions and suspended particles and loss of volatile organic compounds in a traditional method are effectively solved, and the method is suitable for various kinds of water with high salt, high turbidity and the like. Toxic chemical reagents are not needed in the whole process, waste liquid containing chromium and mercury is not generated, the method is green and environmentally friendly, the detection cost and waste liquid treatment cost are remarkably reduced, technical support is provided for real-time monitoring of the water environment and pollution traceability, and the method has high anti-interference capacity, high applicability and sustainable development benefits.

The invention provides a liquid polycarboxylate superplasticizer quality identification method based on an infrared spectrogram, equipment and a medium. The method comprises the following steps: carrying out Fourier transform infrared spectrum scanning test by adopting an attenuated total reflection method to obtain an infrared spectrogram of a reference water reducer; selecting characteristic peak areas of S1081 and S1638 from the infrared spectrogram, and defining a peak area ratio A = S1081 / (S1081 + S1638); respectively adding equal proportion of water into the reference water reducing agent, recording the water adding rate Wi, calculating the peak area Ai of the reference water reducing agent after the water is added, and establishing a water reducing rate working curve according to the Wi and the Ai; obtaining an infrared spectrogram of the to-be-detected water reducing agent, calculating a peak area ratio As of the to-be-detected water reducing agent, and obtaining a water adding rate Ws of the to-be-detected water reducing agent according to the water reducing rate working curve; if Ws is less than or equal to 10%, the quality of the to-be-detected water reducing agent is qualified; if Ws is greater than 10%, the quality of the to-be-detected water reducing agent is unqualified. Through the infrared spectrogram and the working curve, time and labor are saved, the testing frequency is high, and rapid judgment of the quality of the polycarboxylic acid liquid water reducer is achieved.

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.

A system and method of evaluating a level of proliferative disorder may include radiating a population of cells with Infrared (IR) radiation, and obtaining, via one or more Attenuated Total Reflection (ATR) detectors, respective spectral distribution data elements, representing a spectral distribution of IR radiation reflected from a respective location in the population of cells. For at least one specific location in the population of cells, embodiments of the invention may produce a matrix representation of the respective spectral distribution data element, applying a hierarchical image analysis algorithm on the matrix representation, and calculating one or more image-based indicator values, based on outcome of said hierarchical image analysis algorithm. These image- based indicator values may be characteristic of cell proliferation at the specific location. Based on the one or more image-based indicator values, embodiments may calculate a proliferation score, indicating a level of proliferative disorder of cells in the specific location.

A cured product of a resin composition according to the present invention includes at least silsesquioxane. When the average thermal expansion coefficient of the cured product at 30 to 200° C. is expressed as α1 [K−1], at least one of requirements α1 / α2≥10 and (α1−α2)2×108≥0.4 is satisfied, where a reference value α2 is 350×10−6 [K−1] or less. In the cured product, an absorbance derived from a siloxane bond, an absorbance derived from a hydrocarbon group, and an absorbance derived from a hydroxy group are respectively expressed as Ia, Ib, and Ic, the absorbances being determined by attenuated total reflection using a Fourier transform infrared spectrophotometer. In this case, requirements 0.09≤Ia / Ib≤3.0 and 0.04≤Ic / Ib≤1.0 are satisfied.

Devices and associated methods and apparatus for measuring sample material (e.g., tissue samples) use involve a spectroscopic system or device configured with a sample measurement device (e.g., an attenuated total reflectance infrared (ATR-IR) sample measurement device) that includes a crystal defining a sample receiving surface / interface that is operatively connected to an IR source and an IR detector. The sample receiving surface / interface facilitates the assessment of whether a fixative (e.g., formaldehyde) (and optionally, the amount thereof) is present in a sample material, such as a tissue sample. Measurements are taken at one or more locations within a sample placement structure / region, which can be provided in the form of a probe or raised piercing structure containing one or more ATR-IR (or other) sample measurement devices. The probe can include a piercing structure or mechanism at a distal (open) end of the probe that is configured to form a channel into a selected location (depth) within the sample material in a minimally invasive manner so that the sample is not severely damaged during testing.

The utility model relates to the field of infrared detection, in particular to a liquid pool for an attenuated total reflection accessory of an infrared spectrometer, which comprises a liquid bin, a liquid inlet joint, a liquid outlet joint, a first liquid inlet pipe and a first liquid outlet pipe, a first internal thread groove and a second internal thread groove are formed in the outer side wall of the liquid bin and communicated with an inner cavity of the liquid bin, a first through hole is formed in the liquid inlet connector, a second through hole is formed in the liquid drainage connector, external threads are arranged on the outer walls of the liquid inlet connector and the liquid drainage connector around the through holes, and the first liquid inlet pipe is installed in the first through hole. The first liquid discharge pipe is mounted in the second through hole; the liquid inlet connector is in threaded connection with the first inner threaded groove, the first liquid inlet pipe is communicated with an inner cavity of the liquid bin, the liquid drainage connector is in threaded connection with the second inner threaded groove, and the first liquid drainage pipe is communicated with the inner cavity of the liquid bin. The liquid inlet connector and the liquid outlet connector are in threaded connection with the two internal thread grooves respectively, so that the liquid inlet pipe and the liquid outlet pipe can be easily detached, and maintenance and replacement are facilitated.

The present invention belongs to the technical field of measuring nitrate nitrogen concentration in water bodies, and specifically relates to a method for online detection of nitrate nitrogen in sewage based on mid-infrared total reflection spectroscopy. Fourier transform infrared attenuated total reflection (FTIR-ATR) is used as a technical research method, and the partial least squares method is used to model the infrared spectrum after deconvolution. The application potential of the model is determined by the model evaluation index, thereby indicating whether rapid detection of nitrate nitrogen in industrial wastewater can be achieved. The method can quickly and accurately determine the content of nitrate nitrogen in polluted water bodies, monitor in real time, and has good application prospects.

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.