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31 results about "Fourier transform infrared spectrometry" patented technology
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Photo-modulated reflectance spectrum measuring method and apparatus based on step scan
ActiveCN1804583ALoosening of strict restrictionsEliminate Fourier frequenciesColor/spectral properties measurementsNon-linear opticsReflection spectroscopyLow-pass filter
The invention relates to a method and apparatus of photo-modulation reflection spectroscopy based on step scan. The apparatus comprises a Fourier transform infrared spectrograph measuring system, a laser used as pump light source, a lock-in amplifier and a low-pass filter which connect the Fourier transform infrared spectrograph detector and the circuit controlling plate, wherein the circuit-breaker on the light path between the sample and the laser can transfer the constant pump laser into the modulated laser and feedback it in the reference end of the lock-in amplifier to control the lock-in.
Owner:SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
600-700nm band fourier transform infrared photoluminescence spectrum measuring method and apparatus
ActiveCN1804592AEliminate frequencyLoosening of strict restrictionsColor/spectral properties measurementsFluorescence/phosphorescenceSemiconductor materialsPhotoluminescence
The invention discloses a method and apparatus of 600-700nm wave range Fourier transform photo-induced luminous spectrum. The apparatus comprises a Fourier transform infrared spectrograph measuring system, a laser used as active light source, a lock-in amplifier which connects the Fourier transform infrared spectrograph detector and the circuit controlling plate and a circuit-breaker on the light path between the sample and the laser, so that it can transfer the constant active light into the modulated active light and feedback it in the reference end of the lock-in amplifier to control the lock-in.
Owner:SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
Interferometer for Fourier transform infrared spectrometry
ActiveUS9557221B1Error minimizationImmunizing interferometerOptical measurementsRadiation pyrometryBeam splitterLight beam
An interferometer wherein an incident beam from a radiation source hits a beam splitter at a first oblique angle of incidence and is split into a first, reflected partial beam, and a second, transmitted partial beam, that subsequently travel along separate arms of the interferometer. The first and second partial beams are respectively intercepted, reflected, and re-split to form returning beam portions and reflected and transmitted exit beam portions. A second terminal mirror and a folding mirror, which intercepts the second partial beam at a second oblique angle of incidence, are associated with the second interferometer arm and positioned orthogonal to the reference plane and on opposite sides of the exit path, so that a section of the second partial beam from the folding mirror to the terminal mirror and back to the folding mirror crosses the exit beam twice.
Owner:METTLER TOLEDO AUTOCHEM
Classification and identification upon 13 pathogenic bacteria by using Fourier transform infrared spectroscopic technology
The invention belongs to a classification and identification method upon 13 common pathogenic bacteria, and specifically relates to a method for carrying out classification and identification upon 13 common pathogenic bacteria such as B. cereus, E.coliO157: H7, S.aureus, S.epidermidis, E.coli, E.sakazakii, S.sonnei, L.monocytogenes, C.freunddi, S.typhimurium, E.aerogenes, E.cloacae, and S.enteritidis by using a Fourier transform infrared spectroscopic (FT-IR) technology combined with chemometric operation (hierarchical cluster analysis). The method comprises the steps of the establishment of a FT-IR spectra information database of the 13 pathogenic bacteria, bacteria culturing, ZnSe window manufacturing, spectral acquisition and preprocessing, and result determination by hierarchical cluster analysis. The method has the advantages of high resolution, high speed, simple operation, and low cost.
Owner:威海出入境检验检疫局检验检疫技术中心
Classification and identification upon 12 fungi by using Fourier transform infrared spectroscopic technology
InactiveCN103217399APreparing sample for investigationColor/spectral properties measurementsMetrologyFourier transform
The invention belongs to a classification and identification method upon 12 common fungi, and specifically relates to a method for carrying out classification and identification upon 12 common fungi such as F.graminearum, A.terricola, P.citreonigrum, A.flavus, A.parasiticus, P.aurantiogriseum, T.pseudokoningii, A.humicola, P.viridicatum, A.funigatus, A.uersicolor, and F.solani by using a Fourier transform infrared spectroscopic (FTIR) technology combined with chemometric operation (hierarchical cluster analysis). The method comprises the steps of the establishment of a FTIR spectra information database of the 12 fungi, fungi culturing, ZnSe window manufacturing, spectral acquisition and preprocessing, and result determination by hierarchical cluster analysis. The method has the advantages of high resolution, high speed, simple operation, and low cost.
Owner:威海出入境检验检疫局检验检疫技术中心
Method and system for low temperature detection of semi volatile organic compounds
ActiveUS10401336B2Condensation is prevented and minimizedVapor pressure dropComponent separationWithdrawing sample devicesGas phaseAnalysis method
A sample analysis method includes directing a sample that contains one or more SVOC components to a GC column to temporally separate components present in the sample. Output gas from the GC column is expanded into a sample cell. The sample cell is held at a temperature and pressure that are lower than the temperature and pressure at an outlet of the GC column. The volume of the sample cell is sufficiently large for maintaining the one or more SVOC components in a gaseous phase. Infrared spectra of the components in the sample cell are obtained using a Fourier transform infrared spectrometry system.
Owner:MLS ACQ INC
Device for cleaning CVD device and method of cleaning CVD device
ActiveUS8043438B2Efficient removalLittle influenceLiquid surface applicatorsHollow article cleaningLuminous intensityOptical emission spectrometry
An apparatus for cleaning a CVD apparatus that can efficiently remove a by-product such as SiO2 or Si3N4 stuck and deposited onto the surface of an internal wall, an electrode, or the like in a reaction chamber in a film forming process, and a method for cleaning a CVD apparatus. A control monitors luminous intensity data of an F radical in a reaction chamber by optical emission spectroscopy and compares the data with calibrated prestored luminous intensity data, and ends cleaning after a predetermined time passes from reaching a luminous intensity saturation point. Furthermore, concentration data of SiF4 in a gas discharged from the reaction chamber are monitored by a Fourier transform infrared spectrometry and compared with prestored concentration data of SiF4 to decide that the predetermined time has passed when a predetermined cleaning end point concentration is reached, thereby ending the cleaning.
Owner:CANON ANELVA CORP +4
Solid acid, method for preparing the solid acid, and method for desulfurizing hydrocarbon oil using the soild acid as desulfurizing agent
InactiveUS20100227229A1Efficiently and economically performedRemove compoundOther chemical processesPretreated surfacesReduction treatmentKerosene
[Problems] To provide a method for desulfurization with a desulfurizing agent, which can efficiently desulfurize, for example, a hydrocarbon oil as a raw material and fuel for generating hydrogen for use in fuel cells, particularly kerosenes and light oils, without the need to use reduction treatment and hydrogen and at a temperature from room temperature to about 100° C., and a fuel cell system using the desulfurization method. There are also provided a solid acid useful as a constituent of the desulfurizing agent for use in the desulfurization method, and a process for producing the solid acid.[Means for Solving Problems] A solid acid comprising 20 to 99.9% by mass of aluminum oxide and 0.10 to 3.00% by mass of sulfur and having a specific surface area of not less than 150 m2 / g and a pore volume of not less than 0.35 ml / g, and an I1540 / I1450 ratio of 0.12 or less, wherein I1450 represents a peak height of a peak (1450±5 cm−1) attributable to a Lewis acid site as measured by pyridine adsorption Fourier transform infrared spectroscopy, and I1540 represents a peak height of a peak (1540±5 cm−1) attributable to a Broensted acid site, and a process for producing the solid acid, a method for desulfurizing a hydrocarbon oil using the solid acid as a desulfurizing agent, and a fuel cell system using the desulfurization method.
Owner:JAPAN ENERGY CORP
Proton exchange membrane applied to fuel cell and preparation method of proton exchange membrane
InactiveCN113193218AImprove stabilityImprove water retentionFuel cellsCompatibilizationField emission scanning electron microscopy
The invention discloses a proton exchange membrane applied to a fuel cell and a preparation method of the proton exchange membrane. The proton exchange membrane is prepared from the following raw materials: 0.005 g-0. 03g of functionalized cobalt titanate nano particles and 0.97 g-0.995 g of sulfonated polyethersulfone. The novel proton exchange membrane is prepared by combining amine functionalized cobalt titanate nanoparticles with a sulfonated polyethersulfone polymer matrix; surface modification is carried out on cobalt titanate nano particles by adopting grafted (3-aminopropyl)triethoxysilane; the interfacial compatibility of the ACT nano particles subjected to surface modification and the SPES is improved, so that the ACT nano particles can be uniformly dispersed in the SPES film; the prepared nano composite film is characterized by adopting technologies such as Fourier transform infrared spectroscopy, thermogravimetric analysis, a universal testing machine, a field emission scanning electron microscope and an atomic force microscope; the obtained nano composite film shows better stability and good water retention performance.
Owner:深圳氢时代新能源科技有限公司
Method for comprehensively detecting minute amount of wooden meal in crime scene
InactiveCN101782568AThe identification conclusion is scientific and accurateImprove general performanceComponent separationColor/spectral properties measurementsChemical compositionFourier transform on finite groups
The invention relates to a method for detecting a minute amount of wooden meal in a crime scene, belonging to the field of criminal case material evidence detection. The method comprises the following steps of: (1) identifying the wooden meal according to the characteristics of wooden meal detection material cell pits and the composition of inorganic elements, and analyzing and comparing the numbers, the sizes and the shape characteristics of the pits positioned on wooden meal detection material cell walls and the kinds and the difference the relative contents of the contained inorganic elements by a scanning electron microscope-energy spectrometer; (2) identifying the wooden meal according to the difference of principle components of wooden meal detection materials, and analyzing chemical components contained in the wooden meal detection materials by cracking gas chromatography and Fourier infrared spectrometry; (3) identifying the wooden meal according to the difference of leaching components of the wooden meal detection materials, and analyzing the leaching components of the wooden meal detection materials by using a gas chromatography, a high efficiency liquid chromatography and a Fourier transform infrared spectrometry. The invention has scientific and accurate detection conclusion and high applicability.
Owner:CHINA CRIMINAL POLICE UNIV
Magneto-optical modulation reflection spectrum device based on Fourier transform infrared spectrometer
InactiveCN104034686AEliminates Fourier frequency limitationsInformativeMaterial analysis by optical meansOptical pathAdverse effect
The invention discloses a magneto-optical modulation reflection spectrum device based on a Fourier transform infrared spectrometer. The device comprises a Fourier modulation and transformation system, a low-temperature optical magnetic field system, a light modulation and detection system and a light path coupling and detecting system. Based on the light path and circuit contact among the systems, a magneto-optical modulation reflection spectrum method based on a step scanning Fourier transform infrared spectrometer is provided, so that the magneto-optical modulation reflection spectrum measurement under experiment conditions of low temperature and a variable magnetic field can be realized, the adverse effects of luminescence induced by diffuse reflection pumping light and sample light can be overcome, the detecting and processing capacity on weak signals is improved andsemiconductor faint light modulation properties can be effectively detected under the conditions of low temperature and a high-intensity magnetic field.
Owner:SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
Method for classifying and identifying three kinds of Listeriosis by Fourier transform infrared spectrometry technology
The invention belongs to classification and identification of three kinds of Listeriosis, and particularly discloses a method for classifying and identifying Listeria monocytogenes (L. monocytogenes, Listeria iuanuii (L. iuanuii) and Listeria innocua (L. innocua) by the combination of a Fourier transform infrared spectrometry (FT-IR) technology and stoichiometric operation (hierarchical cluster analysis). The method comprises the following steps of: establishing an FT-IR spectral information database of the three kinds of Listeriosis, culturing bacteria, making a zinc selenide (ZnSe) window, performing spectral collection and pretreatment, and finally determining a result through hierarchical cluster analysis. The invention has the advantages that: the method is high in resolution, quick, easy to operate and low in cost.
Owner:威海出入境检验检疫局检验检疫技术中心
Graphene oxide-cerium oxide-iron oxide composite material and synthetic method thereof, and application in catalytic degradation
PendingCN111821982AGood catalytic degradation effectGood catalyticWater contaminantsCatalyst activation/preparationMalachite greenPtru catalyst
The invention discloses a graphene oxide-cerium oxide-iron oxide composite material and a synthesis method thereof, and application of the graphene oxide-cerium oxide-iron oxide composite material incatalytic degradation. According to the invention, a graphene oxide-cerium oxide-iron oxide composite material is prepared by combining a direct precipitation method and a solvothermal method, whereinthe structure and properties of the catalyst are researched by characterizing the catalyst through a Fourier transform infrared spectrum, a scanning electron microscope and an X-ray diffraction spectrometer; under the combined action of the catalyst and potassium peroxydisulfate (KHSO5) serving as an oxidizing agent, a malachite green aqueous solution is catalytically degraded, and the catalyticdegradation capacity of the catalyst on the organic dye malachite green under the conditions of different concentrations, different pH values, different temperatures and different catalyst usage amounts is respectively studied, so that the lower the initial malachite green concentration is, the higher the pH value is, the more the catalyst addition amount is, and the higher the temperature is, thefaster the degradation rate is; and the product has the advantages of obvious catalytic effect, short time and low consumption, can be recycled many times after being processed, and can be used as agreen catalyst.
Owner:MINNAN NORMAL UNIV
Method and device for measuring water content in hydrogen fluoride by utilizing Fourier transform infrared spectroscopy
ActiveCN111855605AAccurate measurementQuick scanMaterial analysis by optical meansHydrogen fluorideFt ir spectra
The invention provides a method and device for measuring water content in hydrogen fluoride by utilizing Fourier transform infrared spectroscopy, which can overcome the defects of a Karl Fischer method and a conductivity analysis method and meet the requirements of efficient, rapid and automatic analysis in industrial production. The infrared spectrum of hydrogen fluoride samples can be scanned rapidly; the operation is simple and the sensitivity is high; defects of the Karl Fischer method and the conductivity analysis method are overcome effectively, and accurate determination of the water content in hydrogen fluoride is realized. The device disclosed by the invention can be used for simultaneously detecting different gas, and the Fourier transform infrared spectrum of the device can be used for more accurately obtaining different gas detection data values.
Owner:PERIC SPECIAL GASES CO LTD
Method for analyzing micro-plastic pollutants in drinking water
InactiveCN113533239AProtect life health safetyMature and efficient detection methodPreparing sample for investigationRaman scatteringStainingSea salt
The invention discloses a method for analyzing micro-plastic pollutants in drinking water, and relates to the technical field of drinking water pollutant analysis. The method comprises detection of micro-plastic pollutants in drinking water, establishment of a micro-plastic extraction and enrichment technology and a detection method in drinking water, and optimization of detection conditions. The detection of the micro-plastic pollutants in the drinking water comprises a dyeing microscopy method and a Fourier transform infrared spectroscopy method. The method for detecting the micro-plastic pollutants in the drinking water comprises the following steps: step 1, taking table salt, tap water, urine and ultrapure water as research objects, purchasing a table salt sample in a supermarket, and selecting three different types of salt, namely Yisuan Tianfuzhen well salt, Caka natural lake salt and Yiyantang natural sunlight sea salt (algae iodine). According to the invnetion, the mature and efficient detection method is established, effective technical support is provided for food and related departments to monitor the quality and safety of commercially available drinking water and other related products, the product quality is improved, and the life health and safety of consumers are protected.
Owner:肖宇
Graphene oxide-terbium oxide-ferric oxide composite material, synthetic method and application thereof in catalytic degradation
PendingCN111569890AGood dispersionImprove performanceWater contaminantsCatalyst activation/preparationMalachite greenPeroxydisulfate
The invention discloses a graphene oxide-terbium oxide-ferric oxide composite material, a synthetic method and application thereof in catalytic degradation. The graphene oxide-terbium oxide-ferric oxide composite material is prepared by combining a direct precipitation method and a solvothermal method. The composite material is characterized by a Fourier transform infrared spectrum, a scanning electron microscope and an X-ray diffraction spectrometer, and structures and properties thereof are researched, then a malachite green aqueous solution is catalytically degraded under the combined action of potassium peroxydisulfate serving as an oxidant, and the catalytic degradation capacity of the catalyst on organic dye malachite green under the conditions of different concentrations, differentpH values, different temperatures and different catalyst usage amounts is respectively researched. The method is simple in synthesis process, mild in condition and high in experimental result reproducibility, and a product with stable performance can be obtained.
Owner:MINNAN NORMAL UNIV
Infrared photoluminescent light path system for eliminating atmospheric absorption interference and experimental method
InactiveCN106124446AReduce equipment costsEasy to adjustMaterial analysis by optical meansICT adaptationOptical pathBroadband
The invention discloses an infrared photoluminescent light path system for eliminating atmospheric absorption interference and an experimental method. The light path system comprises a Fourier transform infrared spectrum system having a stepping-scanning mode, a pump light system serving as a laser light source, a circuit system achieving electric signal processing and Fourier transform functions, a chopper and phase-locking amplifier for optical signal modulation and demodulation and a broadband infrared source for obtaining an atmospheric absorption reference spectrum. The experimental method for eliminating the influence of atmospheric absorption interference in an infrared photoluminescent spectrum is provided based on the light path system. The light path system facilitates obtaining of real linear signals of the infrared photoluminescent spectrum of a narrow bandgap semiconductor and has the advantages of being easy to operate, high in effective reliability and the like.
Owner:SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
Temperature programming-infrared spectroscopy combined device and application thereof in catalyst preparation
ActiveCN113049517AReveal the preparation mechanismReal-time monitoring timeMaterial heat developmentMaterial analysis by optical meansPtru catalystReaction tube
The invention relates to a temperature programming-infrared spectroscopy combined device and application thereof in catalyst preparation, and the device comprises a temperature programming reaction system and a Fourier transform infrared spectrum detection system, and can also be additionally provided with a thermal conductivity cell detector. The temperature programming reaction system is composed of a heating furnace, a reaction tube, more than two gas path modules with flow control and a temperature programming control module. The Fourier transform infrared system is composed of a gas sample cell and an infrared detector. The gas from the temperature programming reaction tube can directly enter a detection system or be discharged to the atmosphere through a bypass. The gas entering the detection system can directly enter the gas sample cell of the Fourier transform infrared spectrometer or enter the gas sample cell of the Fourier transform infrared spectrometer after being detected by the thermal conductivity cell detector through a split / non-split gas path. The temperature programming and infrared combined device is used for researching the reduction process of a catalyst, and is beneficial to comprehensively understanding the reduction process and the reaction mechanism.
Owner:TIANJIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
Fourier transform infrared spectrometer and gas concentration detection method
ActiveCN113390812AExercise state regulationMaterial analysis by optical meansBeam splitterOptical spectrometer
The invention discloses a Fourier transform infrared spectrometer and a gas concentration detection method. The Fourier transform infrared spectrometer comprises a laser source; an interference module which comprises a prism, a beam splitting sheet, a quarter-wave plate, a fixed mirror, a compensation plate, and a moving mirror; and a photoelectric information conversion module which comprises a beam splitter prism and two photoelectric tubes.
Owner:TIANJIN TONGYANG TECH DEV
Active material, non-aqueous electrolyte battery, battery pack and vehicle
ActiveCN107204439BHigh reversible capacityBatteries circuit arrangementsNon-aqueous electrolyte accumulatorsPhysical chemistryAqueous electrolyte
Owner:KK TOSHIBA
Extract of plant powder, and water purifier
PendingUS20210380444A1Improve performancePowder deliveryCosmetic preparationsCelluloseGas liquid chromatographic
Owner:DEXERIALS CORP
Grain-oriented electromagnetic steel sheet, insulating coating formation method for grain-oriented electromagnetic steel sheet, and production method for grain-oriented electromagnetic steel sheet
ActiveCN113286904AStrong adhesionEasy to moveAnalysis by electrical excitationInorganic material magnetismMagnetic fluxCondensed matter physics
The invention relates to a grain-oriented electromagnetic steel sheet. This grain-oriented electromagnetic steel sheet has a base steel sheet, an oxide layer, and a tension-imparting insulating coating. When the oxide layer is analyzed by Fourier transform infrared spectroscopy, the absorption A650 at 650 cm<-1> and the absorption A1250 at 1,250 cm-1 satisfy 0.2<=A650 / A1250<=5.0. In addition, the magnetic flux density B8 of the grain-oriented electromagnetic steel sheet in the rolling direction is at least 1.90 T.
Owner:NIPPON STEEL CORP
Graphene oxide-cerium oxide-tricobalt tetraoxide composite material, synthesis method and application thereof
PendingCN111821984AGood catalytic degradation effectReduce catalysisWater contaminantsMetal/metal-oxides/metal-hydroxide catalystsPtru catalystOrganic dye
The invention discloses a graphene oxide-cerium oxide-tricobalt tetraoxide composite material, a synthesis method and application thereof. According to the invention, a graphene oxide-cerium oxide-tricobalt tetraoxide composite material catalyst is prepared by combining a direct precipitation method and a solvothermal method, and the catalyst is characterized by Fourier transform infrared spectroscopy, a scanning electron microscope and an X-ray diffraction spectrometer, so that the structure and properties of the catalyst are researched; under the combined action of the catalyst and potassiumperoxydisulfate serving as an oxidant, a methylene blue aqueous solution is catalytically degraded, and the catalytic degradation capacity of the catalyst on organic dye methylene blue under the conditions of different concentrations, different pH values, different temperatures and different catalyst usage amounts is respectively researched, so that the lower the initial MB concentration is, thelower the pH value is, the more the catalyst addition amount is, and the higher the temperature is, the faster the degradation rate is; and the product provided by the invention is remarkable in catalytic effect, short in time and less in dosage, far exceeds the catalytic effect of catalysts reported in many literatures, can be recycled after being processed, and can be used as a green catalyst for popularization and application.
Owner:MINNAN NORMAL UNIV
Parylene-a-coated insoluble porous membrane-based portable urea biosensor for use in flow conditions
InactiveUS20200129975A1Portable and convenient to useHigh sensitivityMicrobiological testing/measurementMaterial analysis by electric/magnetic meansUrocaninaseParylene coating
Provided is a portable urea sensor which can be used under a flow condition by using a porous polytetrafluoroethylene (PTFE) membrane coated with parylene-A, which is parylene functionalized with an amine by vacuum deposition. To produce a specific electrochemical sensor signal from urea, urease, which is an enzyme hydrolyzing urea, is immobilized to a parylene-A-coated PTFE membrane by chemical crosslinking using glutaraldehyde. The urea-immobilized membranes are assembled in a polydimethylsiloxane (PDMS) fluid chamber, and a screen-printed carbon 3-electrode system is used. The success of the urease immobilization process is confirmed using scanning electronmicroscopy (SEM) and Fourier-transform infrared (FTIR) spectroscopy. The optimal concentration of urease to be immobilized to the parylene-A-coated PTFE membrane is determined to be 48 mg / mL, and the optimal number of the membranes in the PDMS chamber is determined to be 8.
Owner:IND ACADEMIC COOP FOUND HALLYM UNIV
Spectroscopic method and device for quickly testing type II infrared superlattice interface quality
ActiveCN103134779BSo as not to damageUnlimited integration time limitEmission spectroscopyAnalysis by material excitationPhotoluminescenceSignal on
Owner:SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
Fourier transform infrared spectrometer and gas concentration detection method
ActiveCN113390812BExercise state regulationMaterial analysis by optical meansBeam splitterOptical spectrometer
A Fourier transform infrared spectrometer and a gas concentration detection method, the Fourier transform infrared spectrometer comprising: a laser source; an interference module, wherein the interference module comprises: a prism; a beam splitter; a quarter wave plate; a fixed mirror; A moving mirror; and a photoelectric information conversion module, including: a beam splitter prism; and two photocells.
Owner:TIANJIN TONGYANG TECH DEV
600-700nm band Fourier transform infrared photoluminescence spectrum measuring method and an apparatus
ActiveCN100465620CSolving the Mutual Restriction of Sampling Time ConstantsEasy extractionColor/spectral properties measurementsFluorescence/phosphorescencePhotoluminescenceSpectrograph
Owner:SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
Infrared detection sensor device for detecting quality of automobile lubricating oil
PendingCN113702325AFor quick inspectionQuick checkMaterial analysis by optical meansMechanical engineeringMaterials science
The invention relates to an infrared detection sensor device for detecting the quality of automobile lubricating oil. The device comprises a sensor body, and a Fourier transform infrared spectroscopic analysis device is mounted on the sensor body and is connected with a computer; and the Fourier transform infrared spectroscopic analysis device is provided with a feeding hole for an engine oil sample loading card to enter. The feeding hole is formed, and the engine oil sample loading card is inserted or taken out by adopting a card insertion mode, so that an oil sample can be conveniently and quickly submitted for inspection and taken out after detection, and flow detection can be conveniently and quickly realized.
Owner:武汉云御技术服务有限公司
A photo-modulated reflectance spectrum measuring method and an apparatus based on step scanning
ActiveCN100465617CSuppression of interfering signalsUseful for PR characteristic measurementColor/spectral properties measurementsNon-linear opticsReflection spectroscopyLow-pass filter
The invention relates to a method and apparatus of photo-modulation reflection spectroscopy based on step scan. The apparatus comprises a Fourier transform infrared spectrograph measuring system, a laser used as pump light source, a lock-in amplifier and a low-pass filter which connect the Fourier transform infrared spectrograph detector and the circuit controlling plate, wherein the circuit-breaker on the light path between the sample and the laser can transfer the constant pump laser into the modulated laser and feedback it in the reference end of the lock-in amplifier to control the lock-in.
Owner:SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
Method for comprehensively detecting minute amount of wooden meal in crime scene
InactiveCN101782568BThe identification conclusion is scientific and accurateImprove general performanceComponent separationColor/spectral properties measurementsChemical compositionFourier transform on finite groups
The invention relates to a method for detecting a minute amount of wooden meal in a crime scene, belonging to the field of criminal case material evidence detection. The method comprises the following steps of: (1) identifying the wooden meal according to the characteristics of wooden meal detection material cell pits and the composition of inorganic elements, and analyzing and comparing the numbers, the sizes and the shape characteristics of the pits positioned on wooden meal detection material cell walls and the kinds and the difference the relative contents of the contained inorganic elements by a scanning electron microscope-energy spectrometer; (2) identifying the wooden meal according to the difference of principle components of wooden meal detection materials, and analyzing chemical components contained in the wooden meal detection materials by cracking gas chromatography and Fourier infrared spectrometry; (3) identifying the wooden meal according to the difference of leaching components of the wooden meal detection materials, and analyzing the leaching components of the wooden meal detection materials by using a gas chromatography, a high efficiency liquid chromatography and a Fourier transform infrared spectrometry. The invention has scientific and accurate detection conclusion and high applicability.
Owner:CHINA CRIMINAL POLICE UNIV
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