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31 results about "Fourier transform infrared spectrometry" patented technology

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

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

Method for comprehensively detecting minute amount of wooden meal in crime scene

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

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 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

Infrared photoluminescent light path system for eliminating atmospheric absorption interference and experimental method

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

Graphene oxide-cerium oxide-tricobalt tetraoxide composite material, synthesis method and application thereof

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

Spectroscopic method and device for quickly testing type II infrared superlattice interface quality

The invention discloses a spectroscopic method and a device for quickly testing type II infrared superlattice interface quality. The spectroscopic device comprises a Fourier transform infrared measuring system which has a function of step scan, a laser device which serves as a pump light source, a temperature-changing and magnetic-field-changing sample measuring system, a phrase lock amplifier which connects a detector and a circuit control panel in the Fourier transform infrared measuring system, and a wave chopper which is arranged between the temperature-changing and magnetic-field-changing sample measuring system and the laser device. With the spectroscopic device being used, the type II infrared superlattice interface quality is quickly tested through measuring the degree of attenuation of the photoluminescence intensity of type II infrared superlattices along a magnetic field. The test for infrared band In As / Ga Sb type II infrared superlattices of molecular beam epitaxy indicates that the spectroscopic method for quickly testing the type II infrared superlattice interface quality is an optical method capable of quickly and conveniently testing type II infrared superlattice interfaces. The spectroscopic method for quickly testing the type II infrared superlattice interface quality has the advantages of being lossless and sensitive, and is especially suitable for the detection of weak optical signals on the type II infrared superlattice interfaces.
Owner:SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI

Method for comprehensively detecting minute amount of wooden meal in crime scene

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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