31 results about "Fourier transform infrared spectrometry" patented technology

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.

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.

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.

The present invention provides an active material capable of realizing a nonaqueous electrolyte battery that can exhibit a high reversible capacity. According to one embodiment, there is provided an active material comprising particles of a Na-containing niobium-titanium composite oxide having an orthorhombic crystal structure. In the infrared diffuse reflectance spectrum measured by the diffuse reflectance Fourier transform infrared spectroscopy on the surface of the particles of Na-niobium-titanium composite oxide, at 3350 to 3450 cm ‑1 The strongest peak in the range of P 1 The peak intensity of I 1 1.6 or less.

Provided are an extract, which is a fractionated component 1 of a water extract of a plant powder, wherein the fractionated component 1 is a fractionated component having a fractionation molecular weight of 12,000 or greater, wherein an ethanol-undissolved component of the fractionated component 1 exhibits a peak attributable to carboxylic acid in a Fourier transform infrared spectroscopy (FT-IR) measurement and exhibits a peak attributable to cellulose in a gas chromatography mass spectrometry (GC-MS) measurement, and wherein an ethanol-dissolved component of the fractionated component 1 exhibits a peak attributable to carboxylic acid in the FT-IR measurement and exhibits a peak attributable to a plant protein in the GC-MS measurement, and a water-purifying agent containing the extract.

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.

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.

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.

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.

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.

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.

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.