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61 results about "Ultraviolet visible spectroscopy" patented technology
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Ultraviolet–visible spectroscopy or ultraviolet–visible spectrophotometry (UV–Vis or UV/Vis) refers to absorption spectroscopy or reflectance spectroscopy in part of the ultraviolet and the full, adjacent visible spectral regions. This means it uses light in the visible and adjacent ranges. The absorption or reflectance in the visible range directly affects the perceived color of the chemicals involved. In this region of the electromagnetic spectrum, atoms and molecules undergo electronic transitions. Absorption spectroscopy is complementary to fluorescence spectroscopy, in that fluorescence deals with transitions from the excited state to the ground state, while absorption measures transitions from the ground state to the excited state.
Method and device for measuring sulfur content in coal by ultraviolet absorption spectroscopy
ActiveCN101806727AEliminate absorptionQuick analysisColor/spectral properties measurementsDecompositionWater vapor
The invention discloses a method and a device for measuring sulfur content in coal by ultraviolet absorption spectroscopy. In the measurement method, the decomposition scale and a threshold are determined adaptively by combining empirical mode decomposition with 3sigma criterion, and non-stationary characteristics of differential absorption degree per se can be fully retained, so the spectral interference problem caused by dust, water vapor and background gas in combustion gas is effectively solved; the instantaneous concentration of SO2 is obtained through calculation according to the differential absorption degree after noise reduction and trend term removal, and the total sulfur content accumulated in the coal sample combustion gas is calculated through the gas flow; the sulfur content in the coal can be obtained by dividing the coal sample amount by the total sulfur content separated from the coal sample combustion; and the pretreatment process needed to be performed on the combustion gas by coulometric titration and an infrared absorption method is avoided. The device for measuring the sulfur content in the coal by the ultraviolet absorption spectroscopy comprises a combustion furnace, a measuring chamber, an ultraviolet light source, a spectrometer, an air purifying device, a flow meter, a waste gas treatment device, a computer, and the like.
Owner:SOUTHEAST UNIV
Characterization of crude oil by ultraviolet visible spectroscopy
ActiveUS20160187253A1Provide informationImprove oil qualityColor/spectral properties measurementsMaterial testing goodsAniline pointCloud point
A system and a method for calculating and assigning an indicative value, such as cetane number, pour point, cloud point and aniline point, of a fraction of an oil sample based on an index calculated and assigned from ultraviolet visible spectroscopy data of the oil sample.
Owner:SAUDI ARABIAN OIL CO
Characterization of crude oil by ultraviolet visible spectroscopy
ActiveUS9285307B2Provide informationImprove oil qualityColor/spectral properties measurementsMaterial testing goodsAniline pointCloud point
A system and a method for calculating the cetane number, pour point, cloud point and aniline point of a gas oil fraction of crude oil from the density and ultraviolet visible spectroscopy of a sample of the crude oil.
Owner:SAUDI ARABIAN OIL CO
Characterization of crude oil by ultraviolet visible spectroscopy
ActiveUS9778240B2Obtained relatively rapidly and inexpensivelyColor/spectral properties measurementsMaterial testing goodsAPI gravityUltraviolet
Owner:SAUDI ARABIAN OIL CO
Method for identifying Chinese spirits with different flavors by ultraviolet spectroscopy
ActiveCN101936891AImprove applicabilityAccurate identificationColor/spectral properties measurementsCuvetteUltraviolet
The invention provides a method for identifying Chinese spirits with different flavors by ultraviolet spectroscopy. The method comprises the following steps of: putting the Chinese spirits with known different standard flavors in quartz cuvettes respectively, scanning by using an ultraviolet spectrometer and establishing a spectrogram library of the Chinese spirits with different standard flavors; putting the Chinese spirit with the flavor to be detected in a quartz cuvette, scanning by using the ultraviolet spectrometer and recording the spectrogram of the Chinese spirit with the flavor to be detected; and comparing the spectrogram of the Chinese spirit with the flavor to be detected with the spectrograms of the Chinese spirits with different standard flavors in the spectrogram library and judging the flavor of the Chinese spirit to be detected. The method is fast and efficient; the flavor of the Chinese spirit to be detected can be detected within only a few minutes by the ultraviolet spectroscopy; pretreatment of the Chinese spirit with the flavor to be detected is not needed; and the method has the advantages of high adaptability and low cost.
Owner:LUZHOU LAOJIAO CO LTD +1
Characterization of crude oil by ultraviolet visible spectroscopy
ActiveUS20160011102A1Obtained relatively rapidly and inexpensivelyProvide informationColor/spectral properties measurementsMaterial testing goodsAniline pointCloud point
A system and a method for calculating the cetane number, pour point, cloud point and aniline point of a gas oil fraction of crude oil from the density and ultraviolet visible spectroscopy of a sample of the crude oil.
Owner:SAUDI ARABIAN OIL CO
Pseudo-ginseng and spurious breed thereof identification method based on ultraviolet visible spectroscopy and chemical mode recognition
InactiveCN107132194AAccurate identificationColor/spectral properties measurementsData binningGinseng
The invention relates to a pseudo-ginseng and spurious breed thereof identification method based on ultraviolet visible spectroscopy and chemical mode recognition. The method specifically includes: collecting a certain number of pseudo-ginseng and spurious breed thereof, drying, crushing, screening with a 120-mesh sieve, and storing in a sealed plastic bottle; determining testing parameters of an ultraviolet visible spectroscopy instrument, and collecting ultraviolet visible spectra of samples; using a KS method to divide each traditional Chinese medicine, using 2 / 3 of the samples for training and 1 / 3 of the samples for predicting, and merging training data of all types into a total training set and predicting data into a total predicting set; determining PLS-DA factor number, building a PLS-DA model, and substituting the spectra of the samples in the predicting set into the PLS-DA model to acquire type of the samples in the predicting set. Spectral data are acquired through an ultraviolet visible spectrophotometer, so that detection is quick, environment-friendly and nondestructive; a PLS-DA method is adopted for modeling to build the model for detecting the pseudo-ginseng and the spurious breed thereof, so that accuracy is high. The identification method is suitable for identifying pseudo-ginseng and the spurious breed thereof.
Owner:TIANJIN POLYTECHNIC UNIV
Characterization of an aromaticity value of crude oil by ultraviolet visible spectroscopy
ActiveUS20170003217A1Obtained relatively rapidly and inexpensivelyPreparing sample for investigationColor/spectral properties measurementsAPI gravityUltraviolet
A system and a method for characterizing an aromaticity value of a crude oil sample from the weight and ultraviolet visible spectroscopy of the sample id provided. The system and method includes calculating and assigning a crude oil ultraviolet visible index and using the assigned index to calculate and assign an aromaticity value of the sample, and optionally to calculate and assign an API gravity.
Owner:SAUDI ARABIAN OIL CO
Method for measuring content of ascorbic acid in plants by utilizing ultraviolet spectroscopy
InactiveCN102608056AEasy to operateSuitable for batch determinationColor/spectral properties measurementsHigh concentrationSpectroscopy
The invention discloses a method for measuring content of ascorbic acid in plants by utilizing ultraviolet spectroscopy. The method comprises the following steps of: measuring an ultraviolet absorption value of the ascorbic acid in sample extraction buffer, damaging the ascorbic acid so as to measure a background ultraviolet absorption value through an alkali treatment method, and calculating the content of the ascorbic acid through a difference. The method is characterized in that: a high-concentration alkali treatment method is adopted when a background sample is measured, so that the reduced form ascorbic acid is eliminated completely, and the influence of an alkaline environment on ultraviolet absorption of solution to be measured is avoided simultaneously. The method is simple to operate, the measurement result is accurate, and the reducing substances are not easy to get disturbed. The method is suitable for measuring sample ascorbic acid with higher numbers in botanical studies.
Owner:NANJING AGRICULTURAL UNIVERSITY
High-pressure ultraviolet visible near-infrared spectroscopy device for online monitoring of supercritical system
ActiveCN103712931AGood reproducibilityImprove reliabilityColor/spectral properties measurementsExhaust valveChemical reaction
The invention relates to a high-pressure ultraviolet visible near-infrared spectroscopy device for online monitoring of a supercritical system. The high-pressure ultraviolet visible near-infrared spectroscopy device comprises a high-pressure reaction kettle, a controller, an ultraviolet visible near-infrared spectrometer or an ultraviolet visible spectrometer and a computer, wherein the ultraviolet visible near-infrared spectrometer or the ultraviolet visible spectrometer is connected with the computer through a conducting wire, the high-pressure reaction kettle is arranged in a sample bin of the ultraviolet visible near-infrared spectrometer or the ultraviolet visible spectrometer, and the high-pressure reaction kettle is connected with the controller through the conducting wire. The high-pressure reaction kettle is communicated with a high-pressure injection pump and a sample introduction metering pump through a feed valve, a sample pipe and a gas-liquid three-way valve, which are mounted on a pipeline, and communicated with a nitrogen bottle and a vacuum pump through an exhaust valve and a gas three-way valve which are mounted on the pipeline. The high-pressure reaction kettle of the high-pressure ultraviolet visible near-infrared spectroscopy device provided by the invention has the advantages of reasonable design, convenience in use, accurate monitoring and the like, and can be used for online monitoring of physical conversion and chemical reaction processes under supercritical conditions.
Owner:SHAANXI NORMAL UNIV
Gas component detection method and device based on ultraviolet spectroscopy
InactiveCN106018310ADisplay componentsDisplay contentColor/spectral properties measurementsDecompositionUltraviolet
The invention discloses a gas component detection method and device based on ultraviolet spectroscopy. According to the device, an ultraviolet light source is connected with a collimating lens arranged on the outer side of an inlet of a gas absorption cell to provide ultraviolet light during detection; a first concave reflecting mirror arranged on the inner side of the inlet of the gas absorption cell and a second concave reflecting mirror arranged on the inner side of an outlet of the gas absorption cell sequentially reflect collimated ultraviolet light until the ultraviolet light is reflected to a focusing lens; the reflection light reflected sequentially passes by to-be-detected gas injected in advance; a spectrometer performs spectrum analysis on focused reflection light and sends obtained absorption spectra to a data processing device; the data processing device performs comparison and analysis according to the wavelength and power value of input ultraviolet light, gas pressure and temperature of the to-be-detected gas as well as standard diagrams of absorption spectra and prestored gas ultraviolet light absorption spectra and obtains and displays components and content of the to-be-detected gas, and accordingly, the detection efficiency and accuracy of SF6 decomposition components are improved.
Owner:ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
Method for quantitatively analyzing adsorption capacity of stone powder to polycarboxylic superplasticizer by ultraviolet derivative spectroscopy
InactiveCN108872115AReduce the amount of adsorptionEasy to understand the anti-adsorption abilityColor/spectral properties measurementsSide chainSuperplasticizer
The invention discloses a method for quantitatively analyzing the adsorption capacity of stone powder to polycarboxylic superplasticizer (PCs) by ultraviolet derivative spectroscopy. The method comprises the following steps: (1) establishing an absorption spectrum curve of a standard solution by using an ultraviolet visible spectrophotometer; (2) performing second derivative processing of the absorption spectrum curve to extract the ultraviolet characteristic peaks of carboxylic acid of PCs; (3) collecting absorbance A of the solution at the characteristic peaks after blank zero adjustment ofthe spectral curve taking the stone powder and the deionized water system as reference, fitting the relationship formula between the absorbance A and PCs concentrations C by a data statistics method,as working curve, extracting the slope characteristic parameters of the working curve; and (4) according to Langerbeer's law A=KC, determining the change of PCs concentrations by the change of the absorbance values of a filtrate before and after adding stone powder to obtain the adsorption capacity of stone powder to PCs with different side chain lengths. The method is simple in operation, fast inanalysis process, accurate and cheap, and does not require color development.
Owner:NINGBO UNIVERSITY OF TECHNOLOGY
Characterization of crude oil by ultraviolet visible spectroscopy
ActiveUS20150106034A1Obtained relatively rapidly and inexpensivelyElectric/magnetic detection for well-loggingOptical detectionAPI gravityUltraviolet
A system and a method for characterizing a crude oil sample from the weight and ultraviolet visible spectroscopy of the sample, including calculating a crude oil ultraviolet visible index and using the index to calculate the API gravity and the aromaticity of the sample.
Owner:SAUDI ARABIAN OIL CO
Method for determining melamine content by using ultraviolet spectroscopy
InactiveCN102749301AAccurate and effective determinationEasy to operateColor/spectral properties measurementsDNA SolutionsUv spectrum
The invention discloses a method for determining a melamine content by using ultraviolet spectroscopy. The method comprises steps of preparing a Tris-HCl buffer solution with a pH value of 4 to 10; preparing a melamine solution of 0 to 10 [mu]g / L, a DNA solution of 1.0 x 10<-5> to 1.5 x 10<-4> mol / L and a mixing solution of the melamine and DNA by using the Tris-HCl buffer solution, and determining absorbance of each solution using a blank reagent as a reference; establishing a working curve using a melamine concentration as an abscissa, and using differences between the DNA absorbance and the absorbance of the mixing solution of the melamine and the DNA as an ordinate; and adding a to-be-measured melamine liquid into the DNA solution, determining the absorbance, calculating the melamine concentration in accordance with the working curve, and converting the concentration into a corresponding melamine content in the to-be-measured liquid. The method employs an ultraviolet spectrum detection technology established on the basis of interactions of the melamine and deoxyribonucleic acid, and is accurate, simple, convenient and repeatable.
Owner:NINGBO INST OF TECH ZHEJIANG UNIV ZHEJIANG
Water quality detection system based on ultraviolet visible spectrum detection
InactiveCN106644995AData error is smallAvoid pollutionColor/spectral properties measurementsWater qualityComputer module
The invention discloses a water quality detection system based on ultraviolet visible spectrum detection. A first spectrum testing unit and a second spectrum testing unit respectively comprise a light source, a detection probe and a spectrometer and are connected with a first industrial computer and a second industrial computer respectively, both the first industrial computer and the second industrial computer are connected with a main control computer, the main control computer is respectively connected with an alarm device, a storage module, a display module and an instrument control module, the instrument control module is respectively connected with a cleaning system and a flow path system, the cleaning system is connected with the flow path system, and a sample pretreatment device is connected onto the flow path system. The two testing units and the two industrial computers are added, large data errors caused by faults are prevented, the main control computer gives an alarm to remind a worker of large testing errors when the errors are large, the worker detects whether instruments are damaged or improperly operated or not, the problem of detection errors is solved, and the water quality detection system is convenient to use.
Owner:ANHUI BISHUI ELECTRONICS TECH
Light path of ultraviolet visible spectrophotometer
InactiveCN102564585AShort optical pathTest accurateRadiation pyrometrySpectrometry/spectrophotometry/monochromatorsGratingLight spot
The invention discloses a light path of an ultraviolet visible spectrophotometer. The light path comprises a light source reflector for reflecting a light source into a horizontally linear light path, wherein a first reflector is arranged at the tail end of the horizontally linear light path and used for reflecting the horizontally linear light path into a 30-degree linear light path; a grating is arranged at the tail end of the 30-degree linear light path and used for reflecting the 30-degree linear light path into a 50-degree linear light path; and a second reflector is arranged at the end of the 50-degree linear light path and used for reflecting the 50-degree linear light path into a vertically linear light path vertical to the horizontally linear light path. The finally obtained vertically linear light path is a finally used light path; the light route is short, the energy loss is reduced, the energy is 5 to 10 times that of the conventional spectrophotometer, and the light spot is reduced by 4 to 5 times; the spectrophotometer can be used for analyzing 20 mu L of trace nucleic acid; and the generality is high.
Owner:SHANGHAI METASH INSTR
Preparation method and application of Chinese yam polysaccharide-chromium complex
InactiveCN107325198ASimple preparation processEasy to produceHeavy metal active ingredientsOrganic active ingredientsBlood sugarCoordination complex
The invention discloses a preparation method and application of Chinese yam polysaccharide-chromium complex. The Chinese yam polysaccharide-chromium complex is characterized in that the mass fraction of chromium in the Chinese yam polysaccharide-chromium complex is 5.1%, and the Chinese yam polysaccharide-chromium complex is prepared in a way that purified Chinese yam polysaccharide and chromium are subjected to self-assembling reaction under a certain condition. A reaction product is purified and separated, and an ultraviolet-visible spectroscopy method and an infrared spectroscopy method are subjected to coordination analysis to prove that the polysaccharide and Cr<3+> form a coordination compound. The mass ratio of a Cr element in the Chinese yam polysaccharide-chromium complex is measured as 5.1% by a flame atomic absorption spectroscopy method. An animal activity experiment indicates that the Chinese yam polysaccharide-chromium complex has a function of obviously lowering animal blood sugar and improving immunity. Therefore, the Chinese yam polysaccharide-chromium complex can be used for preparing medicines and health care food capable of resisting diabetes and immunomodulator.
Owner:FUJIAN AGRI & FORESTRY UNIV
Colorimetric analysis method for quickly measuring trypsin
ActiveCN103175800AStrong absorption capacityEasy to prepareColor/spectral properties measurementsPeak valueColor reaction
The invention discloses a colorimetric analysis method for quickly measuring trypsin. The method comprises the following steps of: detecting the ultraviolet-visible spectroscopy of silver nanoparticles; carrying out chromogenic reaction between the trypsin and the polypeptide modifying silver nanoparticles; detecting the ultraviolet-visible spectroscopy of the reaction product at the reaction endpoint; calculating the difference value between the light absorption peak value of the silver nanoparticles and the light absorption peak value of the reaction product, and then obtaining the content of the trypsin according to comparison of the difference value with a predetermined standard curve. The detection method provided by the invention has high-sensitivity selective response to the trypsin and the lowest detection concentration reaches 2ng / mL; and the detection method provided by the invention has no need of complex chemical modification or signal marking, and is high in antijamming capability and capable of quickly and accurately realizing the detection of the trypsin, therefore, the detection method is suitable for clinical application, for example diagnosis of diseases such as pancreatitis.
Owner:SUZHOU INST OF BIOMEDICAL ENG & TECH CHINESE ACADEMY OF SCI
Ultraviolet protective transparency
A transparency includes an additive such that the transparency blocks greater than 50% of light of a wavelength range of 400 nm to 430 nm as measured by ultraviolet-visible spectroscopy from passing through the transparency and the transparency has a total visible light transmittance of greater than 65% as measured by way of ASTM D1003-07. A transparency includes an additive such that the transparency blocks greater than 70% of the light of the wavelength range of 400 nm to 430 nm as measured by ultraviolet-visible spectroscopy from passing through the transparency and the transparency has a total visible light transmittance of greater than 60% as measured by way of ASTM D1003-07.
Owner:PPG IND OHIO INC
Characterization of crude oil by ultraviolet visible spectroscopy
ActiveUS20170370830A1Provide informationImprove oil qualityColor/spectral properties measurementsMaterial testing goodsChemical physicsSpectroscopy
A system and a method for determining one or more distillation temperatures for one or more given distillation weight percentages of a crude oil sample are provided, which can be used to produce a simulated distillation curve. Simulated distillation temperatures of crude oil samples are assigned as a function of density and data derived from UV / Visible spectroscopy measurement of the crude oil samples.
Owner:SAUDI ARABIAN OIL CO
Characterization of crude oil by ultraviolet visible spectroscopy
ActiveUS10048194B2Provide informationImprove oil qualityColor/spectral properties measurementsMaterial testing goodsAniline pointCloud point
A system and a method for calculating and assigning an indicative value, such as cetane number, pour point, cloud point and aniline point, of a fraction of an oil sample based on an index calculated and assigned from ultraviolet visible spectroscopy data of the oil sample.
Owner:SAUDI ARABIAN OIL CO
Detection method of content of N-methylimidazole in imidazolium ionic liquid
InactiveCN107300531AMaterial analysis by observing effect on chemical indicatorColor/spectral properties measurementsAnhydrous ethanolAnalysis method
The invention discloses a detection method of the content of N-methylimidazole in imidazolium ionic liquid. The detection method comprises the following steps: adopting a UV ultraviolet-visible spectroscopy analysis method to prepare the imidazolium ionic liquid and anhydrous ethanol into a 0.1mol / L mixed solution, and by taking an ethanol solution (0.05mol / L) of Cu(II) ions as a complexing color indicator, carrying out UV ultraviolet-visible spectroscopy analysis; according to an obtained maximum absorption peak position lambda max of ultraviolet-visible spectrum, carrying out quantitative analysis on the N-methylimidazole in the imidazolium ionic liquid, wherein for an external standard method standard sample of the imidazolium ionic liquid, an imported high-purity ionic liquid sample is selected. The detection method adopts the simple, convenient and rapid spectroscopy analysis method to carry out qualitative and quantitative analysis, is relatively little influenced by the properties, such as the variety, the viscosity and the conductivity, of the ionic liquid, has the detection range capable of reaching 0-60mol%, is very practical in rapid analysis and detection on the imidazolium ionic liquid, and has very great actual significance of producing the ionic liquid in a large scale.
Owner:LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
Regenerated catalyst, regeneration method and application of catalyst, and residual oil hydrogenation method
ActiveCN113559874AHigh activityImprove stabilityCatalyst carriersHeterogenous catalyst chemical elementsPtru catalystHydrogenation reaction
The invention relates to the technical field of regenerated catalysts, and discloses a regenerated catalyst, a regeneration method and application thereof, and a residual oil hydrogenation method, the catalyst comprises carbon, a carrier and a hydrogenation active metal component loaded on the carrier, the hydrogenation active metal component contains at least one VIB group metal component and at least one VIII group metal component, based on the total amount of the carrier and the hydrogenation active metal component in terms of oxide, the content of the carrier is 30-99 wt%, the content of the VIB group metal component is 0.5-50 wt% in terms of oxide, and the content of the group VIII metal component is 0.5 to 20 weight%; the content of the carbon is less than 3wt% of the content of the carrier; when the regenerated catalyst is measured by diffuse reflection ultraviolet visible spectroscopy (DRUVS), the absorbance at 630 nm and the absorbance at 500 nm are F630 and F500 respectively, and the ratio Q of F630 to F500 is 1-3. The regenerated catalyst provided by the invention has good activity and stability, can be applied to hydrocarbon oil hydrogenation reaction, and is especially suitable for residual oil hydrogenation reaction.
Owner:CHINA PETROLEUM & CHEM CORP +1
Characterizatin of crude oil by ultraviolet visible spectroscopy
InactiveCN107257926AColor/spectral properties measurementsMaterial testing goodsChemical physicsSpectroscopy
A system and a method for determining one or more distillation temperatures for one or more given distillation weight percentages of a crude oil sample are provided, which can be used to produce a simulated distillation curve. Simulated distillation temperatures of crude oil samples are assigned as a function of density and data derived from UV / Visible spectroscopy measurement of the crude oil samples.
Owner:SAUDI ARABIAN OIL CO
Method for attenuated total reflection far ultraviolet spectroscopy and an apparatus for measuring concentrations therewith
InactiveUS20110013193A1Measure sensitivelyShort timeScattering properties measurementsColor/spectral properties measurementsFar ultravioletUv spectrum
In far ultraviolet spectroscopy using attenuated total reflection, total reflection light is measured by using evanescent waves of total reflection light. The penetration depth thereof is equal to or larger than 150 nm in a wavelength range in the far ultraviolet range wherein the penetration depth depends on a wavelength of the far ultraviolet light, refractive index of an object to be measured, refractive index of optical material of the probe and incident angle of the far ultraviolet light at an interface between the probe and the object. The attenuated total reflection probe is made of an optical material selected so as to have the penetration depth equal to or higher than 150 nm in far ultraviolet wavelength range, and the probe makes contact with the object to be measured at the interface, and the far ultraviolet light is incident on the interface at incident angle larger than critical angle in the wavelength range so as to have the penetration depth equal to or higher than 150 nm. The total reflection light from the interface is measured, and absorbance of the object to be measured is determined.
Owner:KURASHIKI BOSEKI KK
Colorimetric sensing method for generating inorganic nanoparticles based on enzyme catalytic induction
ActiveCN108613972ANo chemical detection requiredHigh catalytic efficiencyMaterial analysis by observing effect on chemical indicatorColor/spectral properties measurementsLinear relationshipPrussian blue
The invention discloses a colorimetric sensing method for generating inorganic nanoparticles based on enzyme catalytic induction. The method comprises the steps: taking a frerric chloride solution, apotassium ferricyanide solution and an enzymatic solution, mixing, respectively adding the mixed solution into target solutions with known different concentrations, carrying out a reaction, quantitatively detecting by ultraviolet-visible spectroscopy to obtain the corresponding ultraviolet-visible absorbance values in all the concentrations, and thus obtaining a linear relationship between the target concentrations and the absorbance values; and adding a to-be-measured target solution to the mixed solution, detecting the absorbance value, and calculating to obtain the target concentration of the to-be-measured target solution. The method directly adopts Prussian blue as a colorimetric probe, and the constructed colorimetric sensing method has the advantages of being fast, simple, low in cost, high in sensitivity, good in selectivity and the like, has satisfactory results in application and has broad application prospects.
Owner:ZHEJIANG UNIV
Heavy oil hydrotreating catalyst and preparation method and application thereof
PendingCN111097436AImprove reactivity stabilitySavings in hydroprocessing costsMetal/metal-oxides/metal-hydroxide catalystsHydrocarbon oils treatmentPtru catalystPhysical chemistry
Disclosed are a catalyst for heavy oil hydrotreatment and a preparation method and application thereof. The catalyst comprises a carrier containing titanium and a metal component supported on the carrier, wherein the metal component comprises at least one VIB group metal and VIII group metals cobalt and nickel; by taking the total weight of the catalyst as a reference in terms of oxide, the content of the at least one VIB group metal is 8-30 wt% and the content of the VIII group metals cobalt and nickel is 2-8 wt%; and the atomic ratio of cobalt to nickel is 2-4. When the catalyst is measuredby diffuse reflectance ultraviolet visible spectroscopy (DRUVS), the absorbance at 630 nm and the absorbance at 500 nm are F630 and F500 respectively, and the ratio Q=F630 / F500 of the absorbance at 630 nm to the absorbance at 500 nm is 1.3-3.0. The catalyst has remarkably improved reaction activity stability and good hydrogenation activity, so that the hydrotreatment cost of heavy oil can be remarkably saved, and the production efficiency of equipment is improved.
Owner:CHINA PETROLEUM & CHEM CORP +1
Characterization of crude oil by ultraviolet visible spectroscopy
ActiveUS10794821B2Provide informationImprove oil qualityTransmissivity measurementsColor/spectral properties measurementsPhysical chemistryVisible spectrometry
A system and a method for determining one or more distillation temperatures for one or more given distillation weight percentages of a crude oil sample are provided, which can be used to produce a simulated distillation curve. Simulated distillation temperatures of crude oil samples are assigned as a function of density and data derived from UV / Visible spectroscopy measurement of the crude oil samples.
Owner:SAUDI ARABIAN OIL CO
A method for measuring wavelength indication error of ultraviolet-visible spectrophotometer
InactiveCN105911008BSolve the measurement problem of arbitrary wavelength indication errorReliable methodColor/spectral properties measurementsFiberLight guide
Owner:HENAN PROVINCE INST OF METROLOGY +1
High pressure flow reactor with window for arrangement in ultraviolet visible spectrometer
InactiveCN100392375CAccurate measurementRadiation pyrometryColor/spectral properties measurementsUltravioletEngineering
The invention discloses a windowed high-pressure reacting kettle able to placed in ultraviolet-visible spectrometer, having a tube shell, the tube body of the shell is an inter-wall structure to form a circular inter-wall cavity, there is a tube space in the shell and there is a high-temperature and high-pressure resistant tube body of reacting kettle in the tube space; outside the tube body of the reacting kettle, an electric heating device is fixed on the inner wall of the shell; sealed pressure caps are set on two ends of the tube body of the reacting kettle to make the reacting kettle compose a sealed cavity, there are two opposite holes made on the pressure caps, there is a high-pressure quartz window sealed on each hole, and there are fluid inlet and outlet set on the reacting kettle. It is an open reacting kettle and can accurately determine the temperature and pressure of the measured fluid and also make real-time ultraviolet atlas determination on the fluid during high-temperature and high-pressure reaction.
Owner:张荣华 +1
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