44 results about "Fourier transform infra red" patented technology

A silicon-nitrogen compound film according to the first aspect of the present invention is made of a material expressed by a compositional formula Si3NxOyHz, where 10≦(3x+2y)≦12, 3.4≦x≦4.0, 0≦y, 0≦z≦2.0, the peak-area ratio of a first area of a first peak appearing near a wave number of 2150 cm−1 in a Fourier-transform infrared absorption spectrum of the material and corresponding to a Si—H stretching vibration to a second area of a second peak appearing near a wave number of 810 cm−1 in the Fourier-transform infrared absorption spectrum and corresponding to a Si—N stretching vibration is smaller than 0.2, and the silicon-nitrogen compound film has a thickness t (in nanometers) and a density d (g / cm3) which satisfy the inequalities,1.9≦d≦2.5, and−700d+1930≦6t≦−700d+2530.

A rapid method for characterizing and identifying microorganisms using Focal-Plane Array (FPA)-Fourier Transform Infrared (FTIR) spectroscopy is disclosed. Multi-pixels spectral images of unknown microorganisms spectra are analyzed and compared to spectra of reference microorganisms in databases. The method allows rapid and highly reliable identification of unknown microorganisms for the purpose of medical diagnosis, food and environmental control.

A toner including a binder resin, a colorant, and a release agent is provided. The difference in absorbance ratio between the toner heated for 1 minute in an atmosphere of 100° C. and the toner stored in an atmosphere of 23° C. is from 0.1 to 0.2. The absorbance ratio is a ratio of an absorbance specific to the release agent (such as at 2850 cm−1 for a wax) to an absorbance specific to the binder resin (such as at 828 cm−1 for a polyester based binder resin), as measured by a Fourier transform infrared-total reflectance (FTIR-ATR) method.

Devices, assemblies, systems and methods useful in the detection of hydrocarbons in well-related fluids such as drilling fluids during well-related operations are disclosed. Such devices, assemblies, systems and methods may be used for real-time analysis of gas(es) extracted from a fluid associated with an ongoing well-related operation. An exemplary method may comprise: receiving gas extracted from the fluid associated with the well-related operation; analyzing the gas using Fourier Transform Infrared (FTIR) spectroscopy; and generating one or more signals useful in the determination of a composition of the gas extracted from the fluid.

An FT-IR toxic gas monitoring system and method for detection of one or more toxic gas species in a fluid environment containing or susceptible to presence of toxic gases. Such gas monitoring system includes: (1) a spectroscopic monitoring assembly for transmitting modulated infrared radiation through a spectroscopic cell that contains a gas sample from such fluid environment and generating a corresponding digitized spectrum characteristics of such gas sample for analysis; (2) a gas sampling and delivery subsystem for sampling the fluid environment and delivering the gas sample to the spectroscopic cell; and (3) a computational assembly (i) including a stored signal-to-noise ratio reference, and a stored background spectrum for the fluid environment when the toxic gas species is not present, and (ii) arranged to analyze the digitized spectrum and responsively produce an output indicative of quantitative presence of the toxic gas species in the fluid environment.

A method for determining a material layer thickness transmissive to infrared (IR) energy in a semiconductor wafer manufacturing process including providing at least one semiconductor wafer comprising an IR transmissive layer; passing IR energy through the IR transmissive layer to produce at least one Fourier transform infrared (FTIR) spectrum; and, determining an amount of the IR transmissive layer present according to an amount of IR energy absorbed by a predetermined contributing characteristic vibrational mode portion of the FTIR spectrum.

A multi-angle full-automatic earth surface fine emissivity spectrum collecting system device is composed of a full-automatic sample rotary platform, an earth surface off-ground infrared radiance measurement device and an earth surface fine emissivity spectrum inversion module. The full-automatic sample rotary platform realizes rapid rotation through an electric rotary platform carried on a movable tabletop, and can remotely control the rotary platform to be switched between a sample and a metal plate in a rotary mode according to a set rotation angle and pace; the earth surface off-ground infrared radiance measurement device mainly adopts a Fourier transform infrared wavelength dispersive spectrometer for observation and measurement and collects and stores off-ground radiance data of the sample and the metal plate within the wave length range of 3-16 micrometers with the cooperation of the full-automatic sample rotary platform; the obtained off-ground infrared radiance data are input to the built earth surface fine emissivity spectrum inversion module, and an emissivity spectral line of the sample within the wave length range of 3-16 micrometers is obtained.

A material and a method for forming a tamper-indicating identification coating are provided. The components of the coating are selected such that the coating exhibits a characteristic absorption spectrum with distinct features in individual regions during Fourier-transform infra-red (FTIR) spectroscopy. The coating components are selected to provide a distinct spectrum while, at the same time, providing a sufficiently complex spectrum such that the coating is difficult to duplicate. Also, a blowing agent in the coating decomposes to change the FTIR spectrum due to the heat associated with resoldering of an out-of-warranty electronic part marked with the identification coating to an in-warranty circuit card. In addition, the coating may contain a fluorophore to reveal the presence of a tamper-indicating identification coating, allowing a manufacturer to check the card by exposure with ultra-violet (UV) light. Further, the coating composition may be changed periodically and tracked to provide a date marker.

The invention discloses a device for sampling and analyzing a liquid. The device comprises an automatic sampler and a Fourier transform infrared gas analyzer, wherein the gas outlet and the gas inlet on the sampler are respectively connected with the gas inlet and the gas outlet of the Fourier transform infrared gas analyzer through guide tubes in a sealing manner to form an analytic system; and the sampler is used for extracting a water sample to be detected through a liquid sample inlet, the water sample is subjected to constant-temperature heating in the sampler, and volatilization gas in the water enters a gas analyzer to be analyzed. The invention relates to an analyzing device for carrying out automatic sampling on the liquid, and can realize rapid, simple and accurate analysis on volatile matters in water.

Attenuated total reflectance (ATR)-Fourier transform infrared (FTIR) metal surface cleanliness monitoring is disclosed. A metal surface of a semiconductor die is impinged with an infrared (IR) beam, such as can be accomplished by using an ATR technique. The IR beam as reflected by the metal surface is measured. For instance, an interferogram of the reflected IR beam may be measured. A Fourier transform of the interferogram may also be performed, in accordance with an FTIR technique. To determine whether the metal surface is contaminated, the IR beam as reflected is compared to a reference sample. For example, the Fourier transform of the interferogram may be compared to the reference sample. If there is deviation by more than a threshold, the metal surface may be concluded as being contaminated.

A silicon-nitrogen compound film according to the first aspect of the present invention is made of a material expressed by a compositional formula Si3NxOyHz, where 10≦(3x+2y)≦12, 3.4≦x≦4.0, 0≦y, 0≦z<2.0, the peak-area ratio of a first area of a first peak appearing near a wave number of 2150 cm−1 in a Fourier-transform infrared absorption spectrum of the material and corresponding to a Si—H stretching vibration to a second area of a second peak appearing near a wave number of 810 cm−1 in the Fourier-transform infrared absorption spectrum and corresponding to a Si—N stretching vibration is smaller than 0.2, and the silicon-nitrogen compound film has a thickness t (in nanometers) and a density d (g / cm3) which satisfy the inequalities,1.9≦d≦2.5, and−700d+1930≦6t≦−700d+2530.

The invention discloses a Raman spectrum discriminating method of natural dyeing silk fabrics, and comprises the following steps: (1) indigo dyeing: a natural indigo dye is adopted to dye silk fabrics with a reduction dyeing method, and a sample 1, a sample 2, and a sample 3 are obtained; (2) a copper coin substrate is prepared; (3) UV aging: the sample 2 and sample 3 are placed in a UV aging test machine for aging for a period of time; and (4) Raman spectrum test: the substrate is placed on a Fourier infrared Raman spectrometer, then the sample 1, sample 2, sample 3 are placed in batches in the Fourier infrared Raman spectrometer to acquire Raman spectrums. In the invention, non-invasive Raman spectrum technology is adopted for performing characterization test for natural indigo dyed silk fabrics and synthetic indigo dyed silk fabrics, and achieves the goal for quickly discriminating the fabrics, and has a significance in food development, fabric dyeing and discrimination and maintenance for ancient textiles.

The invention relates to the technical field of a material and particularly relates to a rubber material consistency monitoring method. The method comprises steps of (1), establishing a vehicle rubberpart basic information database; (2), performing performance tests on defined materials, and constructing a vehicle rubber material performance database including density, Fourier transform infraredspectrum, TG test, etc.; (3), testing sampled parts or failed return parts; and (4), comparing test data of the (3) with the performance database of the (2) to determine the consistency. The method isadvantaged in that whether the materials used in batch parts are consistent with original definition materials can be effectively identified, and no special testing equipment is needed; the method can serve comparison and selection of multi-platform and multi-vehicle model parts, and non-professional technicians can further rapidly determine whether the materials are consistent, and strong generalization property is realized.

The present invention is a method to determine the cetane number of a diesel fuel containing a fatty acid alkyl ester including determining the infrared spectrum of the fuel and correlating the spectrum to the cetane number using a multivariate-based Mid-FTIR model. The fatty acid alkyl ester may be rapeseed methyl ester and the infrared spectrum includes the frequency ranges 4900-3500 cm−1 and 2200-1624 cm−1 or the frequency ranges 4900-3500 cm−1 2200-1800 cm−1 and 1700-1624 cm−1.

The invention discloses a portable Fourier transform infrared gas analyzer suitable for a field complex environment. The analyzer comprises a light source assembly, an interface sealing ring assemblyI, a cable group I, an angle mirror type Michelson interferometer and light path assembly, a power panel, a cable group II, an electrical mainboard, an interface sealing ring assembly II, an interfacesealing ring assembly III, a gas chamber, a battery, a gas pump and an electromagnetic valve; the light source assembly comprises a collimating mirror, an infrared light source and a third plane mirror; and the angle mirror type Michelson interferometer and light path assembly comprises a light transmitting window piece, a first plane mirror, a second plane mirror, a laser detector, a beam splitter, a fourth plane mirror, a first sealing window piece, a second sealing window piece, an infrared detector, an ellipsoidal mirror, a parabolic mirror, a movable mirror, a fixed mirror and a laser device. The gas chamber comprises a third sealing window piece, a first concave mirror, a second concave mirror, a third concave mirror and a fourth sealing window piece. Technical indexes and environmental applicability of the analyzer are superior to those of corresponding foreign products, and the analyzer can be popularized and used in vast areas of China.

Quaternary ammonium salts were incorporated into anthraquinone dyes via a stable linkage. The structure of the antimicrobial colorants were characterized by Fourier Transform Infrared (FTIR), Nuclear Magnetic Resonance (NMR) and UV-vis spectrometry. The dyes demonstrated excellent antimicrobial ability against both gram-negative and gram-positive bacteria in aqueous solution, as indicated by very low minimum inhibitory concentration (MIC). The colorants showed excellent stability in water under light, continuous heating as well as acidic and alkaline conditions.

Devices, assemblies, systems and methods useful in the detection of hydrocarbons in well-related fluids such as drilling fluids during well-related operations are disclosed. Such devices, assemblies, systems and methods may be used for real-time analysis of gas(es) extracted from a fluid associated with an ongoing well-related operation. An exemplary method may comprise: receiving gas extracted from the fluid associated with the well-related operation; analyzing the gas using Fourier Transform Infrared (FTIR) spectroscopy; and generating one or more signals useful in the determination of a composition of the gas extracted from the fluid.

The invention belongs to the technical field of the food detection, and provides a construction method of Fourier transform infrared fingerprint spectrum of Shanxi mature vinegar with different ageingyears, and application thereof. The nature determination on the principle compounds of the Shanxi mature vinegar is performed by utilizing attenuated total-reflection Fourier transform infrared spectrum, the characteristic wavelength is used as the variable to perform the principle component analysis, thereby identifying the Shanxi mature vinegar in different ageing years, and a clustering analysis is used for verifying the result reliability. The method disclosed by the invention is high in accuracy rate, strong in practicability, and has important significance for identifying and protectingthe Shanxi mature vinegar in different ageing years.

An electric double-layer capacitor having a separator that contains polyacrylonitrile. An infrared absorption spectrum of the separator measured by a Fourier transform infrared spectrophotometer has a first peak in a range from 2240 cm−1 to 2250 cm−1 and a second peak in a range from 1580 cm−1 to 1630 cm−1. A ratio of an intensity of the second peak to an intensity of the first peak is 0.08 or more.

The present invention is a method and an apparatus for identifying and quantifying components in an effluent stream from an ammoxidation reactor, the apparatus comprising a microprocessor; and a Fourier Transform infrared spectrometer having a sample cell through which may flow a portion of the effluent stream, an infrared source to emit infrared radiation and pass the infrared radiation through the effluent stream, an infrared detector to detect transmitted infrared radiation at the selected infrared wavelengths and to generate absorbance data due to absorbance of the infrared radiation by the components, wherein each of the components absorbs infrared radiation at one or more of the infrared wavelengths, and an output apparatus to provide the absorbance data to the microprocessor; wherein the microprocessor is programmed to identify and quantify each of the plurality of components based upon the absorbance data and calibration data, the calibration data being obtained from recovery run analyses and calibration analyses in the sample cell. The method may be applied to utilize the apparatus to provide real-time control of the operation of an ammoxidation reactor, based on the analytical results obtained by the FT-IR spectrometer and the calibration model developed therefor.

Disclosed is a Fourier transform infrared spectrophotometer, which comprises: a main interferometer section including a beam splitter, a fixed mirror, a movable mirror, and a phase plate disposed between the beam splitter and the fixed mirror; a control interferometer section having a quadrature control system for calculating a position of the movable mirror; a center-burst-position detection section operable, based on an input of interference signals and interferograms, to subject respective intensities of the interferograms to an addition processing while correcting a positional deviation of the movable mirror, so as to obtain a cumulative interferogram, and detecting a center burst position having a maximum intensity value in the cumulative interferogram; a center-burst-position storage section operable to store the detected center burst position; and a measurement-start-position determination section operable, based on the stored center burst position, to determine a measurement start position of the movable mirror during the measurement operation.

The Fourier transform infrared spectrophotometer includes: a light source 11 for generating infrared light having a wavelength width including an absorption wavelength of a compound to be analyzed; an interferometer including a fixed mirror 15 and a movable mirror 16, for generating interfering light from the infrared light; a detector 25 for generating a voltage with a magnitude corresponding to the intensity of the interfering light, and for outputting a voltage obtained by subtracting, from the aforementioned voltage, a voltage with a predetermined magnitude; a high-pass filter 464 for allowing the passage of frequency components equal to or higher than a predetermined frequency in an output voltage from the detector 25; an amplifier 463 for amplifying an output voltage from the high-pass filter 464 by a predetermined multiplying factor; and an analogue-to-digital converter 27 for converting an output voltage from the amplifier 463 into a digital signal.

A toner including a binder resin, a colorant, and a release agent is provided. The difference in absorbance ratio between the toner heated for 1 minute in an atmosphere of 100° C. and the toner stored in an atmosphere of 23° C. is from 0.1 to 0.2. The absorbance ratio is a ratio of an absorbance specific to the release agent (such as at 2850 cm−1 for a wax) to an absorbance specific to the binder resin (such as at 828 cm−1 for a polyester based binder resin), as measured by a Fourier transform infrared-total reflectance (FTIR-ATR) method.

The invention relates to a kerogen type classification method based on FTIR analysis. According to the method, the difference of functional groups reflected by absorption peaks corresponding to different wave numbers of Fourier transform infrared (FTIR) is used; the characteristics of infrared spectrum absorption peaks of functional groups such as aliphatic hydrocarbon, aromatic hydrocarbon and oxygen in kerogen are established; the relative content of the functional groups is determined; the relative content of the functional groups can reflect the relative content of C, H and O in kerogen; therefore, the correlation between the relative content of O / C and H / C and the characteristic spectrum in kerogen infrared spectroscopy (FTIR) is constructed; and the organic matter type of kerogen isanalyzed through a normal form diagram, so as to judge the type of kerogen. The method has characteristics of simpleness, rapidness and low cost, has characteristics of no damage on a sample, less use amount and substantially improved accuracy, and has a significant application value.

Provided is a plastic lens obtained by curing a curable composition including a curable compound, wherein the curable composition includes 50 parts by mass or more of a (meth)acrylic curable compound relative to 100 parts by mass of the total amount of the curable compound, and in the plastic lens, the absorbance ratio of the maximum absorbance Abs1 at a wave number of 1680 to 1620 cm−1 relative to the maximum absorbance Abs2 at a wave number of 1800 to 1690 cm−1 in an infrared spectrum obtained by measurement with a Fourier transform infrared spectrophotometer is 7.0% or less, as calculated by using the following Formula 1:Absorbance ratio (%)=(Abs1 / Abs2)×100.