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445results about How to "Realize determination" patented technology
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Device and method for measuring permeability coefficient of rock material under action of seepage-stress coupling
InactiveCN101915724AReduce volatilityHigh degree of automationPermeability/surface area analysisMaterial weighingMeasurement deviceCoupling
The invention discloses a device for measuring the permeability coefficient of rock material under the action of seepage-stress coupling, which comprises a triaxial pressure chamber balance system, a permeability coefficient acquisition system and a data acquisition and processing system, wherein the triaxial pressure chamber balance system loads samples axially or laterally through different stress paths; the permeability coefficient acquisition system is connected with the triaxial pressure chamber balance system so as to realize the determination for the quality of penetrating fluid of rock material sample; and the data acquisition and processing system regularly acquires the quality of penetrating fluid of rock material, calculates penetration flow and permeability coefficient, and draws a relationship curve of the permeability coefficient and time, and simultaneously, the data acquisition and processing system also forms a data format of the quality, the penetration flow and the permeability coefficient for storage and display. Such a measurement device can measure the permeability coefficient, as time and stress change, under different stress loading paths, has simple operation and reliable result, and can display the result visually. The invention also discloses a measurement method adopting the measurement device.
Owner:HOHAI UNIV
Method for measuring total porosity of shale
InactiveCN103344541AEasy to operateLow costPermeability/surface area analysisNMR - Nuclear magnetic resonancePhysics
The invention relates to a method for measuring total porosity of shale, belonging to the technical field of exploration and development of petroleum, geology and mining. According to method, the total porosity of the shale can be tested, and the defects in porosity measuring aspects of the shale by utilizing conventional methods such as gas absorption-desorption, nuclear magnetic resonance and high-pressure mercury penetration can be remedied. The method comprises the following steps of: (1) carrying out X-diffraction total rock analysis and X-diffraction clay mineral relative content and organic carbon content analysis on a shale sample, and determining the mass (m1, m2, m3...mn) of various components in a shale skeleton in unit mass M; (2) calculating the volumes (V1, V2, V3...Vn) of the various components in the shale skeleton in unit mass M according to the true densities (rhotrue1, rhotrue2, rhotrue3... rhotruen) of various minerals; (3) drying the shale sample, removing fluid component in the shale, and measuring the mass m of the shale by utilizing an electronic scale; (4) measuring the view volume Vview of the dried shale sample by utilizing an immersion method; and (5) calculating the total porosity phi of the shale. The method has the advantages that the total porosity of the shale can be accurately measured, the operation is simple, and the cost is low.
Owner:CHINA UNIV OF PETROLEUM (EAST CHINA)
A method for measuring a 2D angle of arrival (AOA) of coherently distributed signals
InactiveCN102169170ARealize determinationHigh precisionRadio wave direction/deviation determination systemsPropagator matrixLinear arrays
The invention provides a method for measuring a 2D angle of arrival (AOA) of coherently distributed signals. The method belongs to the technical field of wireless mobile communication technology. The method includes the steps of setting a stereoscopic antenna array composed of three parallel uniform linear arrays; establishing a data vector matrix and a propagator matrix of all the coherently distributed signals; eliminating aperture loss; establishing rotation matrixes and making pairing and combination of characteristic values of the rotation matrixes; and determining a central azimuth angle and a central pitch angle of the distributed signals. In the invention, the propagator is determined with received data firstly, then the three rotation matrixes are determined with the propagator, and finally the central azimuth angle and the central pitch angle of the distributed signals are comprehensively determined through automatically pairing the characteristic values of the three rotation matrixes by using the method in the invention, thereby improving the measuring precision to about 10 times higher than the precision of the prior art. Therefore, the method in the invention has characteristics of simplicity, high reliability, high performance in lowering the calculation processing capacity and complexity degree substantially, high measuring efficiency, high measuring precision degree and so on.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA
Fluorescent probe for detecting pH value and preparation method thereof, and special detection kit
ActiveCN104086536AFast color reactionGood biocompatibility and cell membrane permeabilityMethine/polymethine dyesOrganic chemistrySolventDecomposition
The invention discloses a fluorescent probe for detecting pH value and a preparation method thereof, and a special detection kit. The structure of the fluorescent probe for detecting pH value is disclosed as Formula I. The invention also discloses a preparation method of the compound disclosed as Formula I, which comprises the following steps: (1) carrying out reduction reaction on dihydroxybenzaldehyde disclosed as Formula IV and morpholine to obtain substituted morpholinyl methoxyphenyl diol disclosed as Formula V; and (2) in an inert atmosphere, carrying out substitution decomposition rearrangement reaction on the substituted morpholinyl methoxyphenyl diol disclosed as Formula V and tricarbocyanine dye disclosed as Formula VI in the presence of alkali to obtain the compound disclosed as Formula I. The kit for detecting pH value comprises the compound disclosed as Formula I and a solvent. The fluorescent probe and special detection kit thereof have favorable responsivity for pH value of solutions, can implement marking of lysosome and detection of pH value of the cytolysosome, is simple to operate, has the advantages of low cost, high speed, high sensitivity and the like, and can easily implement popularization and application.
Owner:INST OF CHEM CHINESE ACAD OF SCI
Electrowetting based conformal light sensing integrated digital microfluidic chip
InactiveCN105413765ARealize determinationAchieve automatic fault detection effectLaboratory glasswaresFluid controllersChemical reactionRefractive index
The present invention discloses a conformal light-sensing structure integrated digital microfluidic chip which can monitor a chemical reaction between droplets carrying different components in a digital microfluidic chip in real-time, in the detection application field of digital microfluidic biochemical detection on consumption for a low level sample. According to the chip disclosed by the present invention, on the basis of no change of a current structure and property of electrowetting, a subwavelength scale optical sensing structure is embedded between electrowetting adjacent electrode gaps; a co-planar conformal structure with a hydrophobic layer of the electrowetting structure is kept in structure; by detecting a change of a light-sensing structure light field which is caused by a small change in a refractive index occurring during a process of the droplets reaction, determination for composition and location of a microdroplet is realized. Compared with light sensing composed of a conventional capacitor, an electrical impedance sensor, an electrochemical sensor and a discrete element, the chip disclosed by the present invention has the advantages of being simple in structure, standard CMOS compatible process which is easier to integrate, low in cost and high in accuracy. In addition, a characteristic that a sensing structure is conformal with an electrowetting structure enables a sensing function to be added without reducing the electrowetting performance.
Owner:BEIHANG UNIV
Detection method of determining 16 types of photoinitiators in paper printing and packaging material
ActiveCN102818874AEnable simultaneous analysisRealize determinationComponent separationLiquid liquid partitionPrinting ink
The invention relates to a detection method of determining 16 types of photoinitiators in a paper printing and packaging material, which is used for determining residual amounts of the 16 types of photoinitiators of 2-hodroxy-2-methyl-1-phenylacetone, mehtyl phenylglyoxylate, benzophenone and the like and is characterized by comprising the following concrete steps of: a, sample pretreatment; b, preparation of a standard work solution; c, instrumental analysis; and d, result calculation. Compared with the prior art, through sample pretreatment and optimization of instrumental analysis conditions, the detection method has the advantages that efficiency is high, the 16 kinds of photoinitiators can be simultaneously analyzed and determined within 25m; and printing ink impurities in a sample extraction solution can be better removed in a liquid-liquid distribution impurity removal mode adopted in the sample pretreatment process, so that cost is low, consumption is little, efficiency is high, and sensitivity is high; and in addition, the detection method also has the advantages of high accuracy and good repeatability.
Owner:CHINA NAT TOBACCO QUALITY SUPERVISION & TEST CENT
Calibration system and calibration method of humidity-temperature sensor
InactiveCN101532888AAchieve calibrationCompact structureThermometer testing/calibrationTemperature controlWater baths
The invention discloses a calibration system of humidity-temperature sensor, comprising a calibration chamber of which the top is provided with multiple to-be-measured sensor sockets for mounting to-be-measured sensors; an environmental chamber arranged below the calibration chamber and comprising a saturated salt solution container that is used for holding saturated salt solution and arranged in the heat transferring medium of a water bath tank, and the water bath tank; a temperature control chamber arranged below the environmental chamber and used for fast heating or cooling the water bath tank; a thermal container which is used for keeping the measurement environment stable and in which the calibration chamber, the environmental chamber and the temperature control chamber are arranged; and a control circuit for controlling the heating or cooling of the temperature control chamber. The invention also discloses a calibration method of humidity-temperature sensor. The invention realizes the calibration of humidity-temperature sensor by the same system, and is compactly structured, simple and practical. The calibration has small time consumption and is convenient for practical operation. The calibrating device of the invention is simple, has small volume, can realize portable measurement, has cheap material and low cost, and can be popularised and applied in large scale.
Owner:CHINA AGRI UNIV
Test method and test device for obtaining saturated solubility and diffusion coefficients of solid solute in liquid phase simultaneously
InactiveCN101907549ARealize determinationEnsure consistencySurface/boundary effectMaterial weighingMeasurement deviceMathematical model
The invention relates to a test method and a test device for obtaining saturated solubility and diffusion coefficients of a solid solute in a liquid phase simultaneously. According to solute mass conservation law and Archimedes law in the process of dissolution, a physical model in the process of dissolving the solid solute is established and mathematical description of the physical model is determined so as to establish an experiment characterization method and a measurement device. In the test method and the test device, the saturated solubility and the diffusion coefficients of the solid solute in the liquid phase at a certain temperature and under certain pressure are calculated from the measured real-time dissolved amount through a specific inversion model (physical and mathematical model). The test device has the advantages of simple operation, short measuring time and capability of measuring large quantity of data; and the solubility and the diffusion coefficients are obtained simultaneously, and the measured data can be verified mutually, so the measuring accuracy is improved and the data consistency is ensured well.
Owner:NANJING UNIV OF TECH
Method and device for measuring hyperpressure of flammable gas explosion shock waves
InactiveCN102879144ASimplify operation stepsMeasurement results are intuitiveMeasurement of explosion forceShock waveFlammable gas
The invention discloses a method for measuring hyperpressure of flammable gas explosion shock waves. The method includes placing a horizontal track device in an explosion case; arranging a spherical reference object on horizontal tracks; filling flammable gas with certain concentration into the explosion case; igniting the gas; recording a dynamic process of explosion of the flammable gas by a high-speed camera; analyzing via ProAnalyst kinetic analysis software to obtain acceleration of the spherical reference object under the action of the shock waves; and measuring the hyperpressure of the flammable gas explosion shock waves by using the Newton's second law. The Newton's second law and the characteristic of high-speed analysis of the high-speed cameral are sufficiently utilized, so that the hyperpressure of the flammable gas explosion shock waves is measured via physical principles, and the method has an important guiding significance for preventing and controlling actual flammable gas explosion disasters. Besides, the method has the advantages that a device is simple in structure, operation steps are simple, a measurement result is visible and precise, and closely reflects the actual condition, and the method is easy to popularize.
Owner:CHANGZHOU UNIV
A fatigue lifetime measuring method for anisotropic material structural parts
ActiveCN104316388ASolid theoretical foundationSimplify the modeling processStrength propertiesTurbine bladeCrystal orientation
The invention discloses a fatigue lifetime measuring method for anisotropic material structural parts and belongs to the field of service lifetime analysis and measurement for engine turbine blades. The objective of the invention is to overcome the problem of fatigue life measurement in different crystal orientations for anisotropic materials and structural parts thereof. According to the principles of the fatigue lifetime measuring method, a load condition in a load coordinate system is converted into a load condition in a material coordinate system through coordinate transformation; and based on mechanisms of fracture of the anisotropic materials, a novel form of Hill equivalent strain is provided, and a local strain method in a uniaxial form is expanded to conditions of complex strain. A load at any orientation can be uniformly allowed to be equivalent to a specific crystal orientation to obtain an equivalent load by the fatigue lifetime measuring method. A fatigue lifetime measuring model is built according to material parameters and the equivalent load in the orientation. The fatigue lifetime measuring method is advantageous in that: the fatigue lifetime of the anisotropic materials and the structural parts thereof at any orientation can be accurately measured by only using the material parameters and the equivalent load in the specific crystal orientation, and measurement precision is high.
Owner:AVIC BEIJING INST OF AERONAUTICAL MATERIALS
Measuring method for surface strengthening member fatigue crack expansion rate
ActiveCN105181492AEnsure consistencyRealize determinationMaterial strength using repeated/pulsating forcesCurrent loadTested time
The invention provides a measuring method for a surface strengthening member fatigue crack expansion rate. The method comprises the following steps: sample preparation is carried out, and hardness, a microscopic structure size, distribution of a residual stress in the length direction along the height direction of a sample are measured; an optical observation platform is erected, crack length changes of two sides of the sample during the test process are observed and recorded; a load less than a yield limit is applied to the sample for test, when the crack length expansion amount exceeds an appointed length every time, the test is paused, the cracks are shot and the current load and loading cycles are recorded; the test data of the sample is subjected to analysis and processing, and the fatigue crack expansion rate of the member is obtained. In the measuring method, a sample is cut from a whole-size member directly, and the consistency of the sample and the member is kept. The problems are solved effectively that whole-size member test time is long, the material cost is high, a lot of test data is difficult to obtain, and measuring of the surface strengthening member fatigue crack expansion rate is achieved.
Owner:INST OF MECHANICS - CHINESE ACAD OF SCI
Method for determining biotoxicity of atrazine by utilizing microcystis aeruginosa
InactiveCN103196884ARealize determinationEasy to operateFluorescence/phosphorescenceArbitrary Fluorescence UnitAtrazine
The invention discloses a method for determining the biotoxicity of atrazine by utilizing microcystis aeruginosa. The method comprises the following steps: A, cultivating the microcystis aeruginosa; B, preparing microcystis aeruginosa liquid; C, determining the response time of the chlorophyll fluorescence of the microcystis aeruginosa on the biotoxicity of the atrazine; and D, drawing the standard curve for determining the biotoxicity of the atrazine by utilizing the chlorophyll fluorescence of the microcystis aeruginosa, namely adding atrazine standard liquid with series concentration into the preparation liquid of the microcystis aeruginosa, completely mixing until the 'optimum response time' determined by the step C and determining the chlorophyll fluorescence intensity of the microcystis aeruginosa; and setting three parallel samples for each concentration, setting a blank sample by substituting aseptic distilled water for the sample, calculating the photosynthetic inhibition ratio, and finally drawing the 'dose-effect relation curve of atrazine concentration and photosynthesis inhibition ratio' to serve as the standard curve for quantitatively determining the biotoxicity of the atrazine by the chlorophyll fluorescence method of the microcystis aeruginosa. The method can determine the biotoxicity of the atrazine simply, conveniently and quickly, and is low in cost and environment-friendly.
Owner:HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
Testing method of interlayer bonding power of asphalt pavement
InactiveCN106644933AGuaranteed bonding performanceEffective simulation of cohesionUsing mechanical meansMaterial analysisPower parameterDisplay device
The invention relates to a testing method of interlayer bonding power of an asphalt pavement. The testing method comprises the following steps: preparing a test piece: bonding a lower-layer cement concrete test piece with upper-layer asphalt concrete through bonding layer oil; (2) mounting the test piece: putting a test piece to be tested into a lower clamp and slowly lowering a pressing head; continually lowering the pressing head so as to tightly stick an upper mold and the lower mold; and tightly fixing the upper and lower clamps with the test piece respectively; (3) starting to test: starting a pressure machine and adjusting the speed; starting to carry out a pulling test to enable a force value and displacement on a display device to be changed; and when the test piece is pulled to be opened and the force value reaching a peak valve, recording. According to the testing method of the interlayer bonding power of the asphalt pavement, a vertical load of the asphalt pavement can be really simulated and bonding power parameters are obtained; and evaluation of bonding performances of an interlayer material is convenient to realize.
Owner:CHANGAN UNIV +1
Method for enhancing luminol chemoluminescence using copper oxide nanoparticles
InactiveCN102507543ARealize determinationReduce demandChemiluminescene/bioluminescencePeristaltic pumpFlow cell
The invention discloses a method for enhancing luminol chemoluminescence by using copper oxide nanoparticles and is characterized in that the method comprises the following steps of: firstly pumping a copper oxide nanoparticle colloid solution and a hydrogen peroxide solution into a mixer for mixing through peristaltic pumps respectively, then mixing with a luminol solution, loading the resulting mixture to a flow cell for reaction, and detecting chemoluminescence intensity by a photomultiplier tube. The copper oxide nanoparticles are added to the luminol-hydrogen peroxide system, so as to significantly enhance chemoluminescence signals. The luminol-hydrogen peroxide-copper oxide nanoparticle flow injection chemiluminescence detection can be applied to glucose content determination, with a linear range of 5 mumol / L to 60 mumol / L.
Owner:FUJIAN MEDICAL UNIV
Concurrent measuring method for multiple metallic elements in transformer oil
ActiveCN101221127AAccelerate oil deteriorationImprove safe operationPreparing sample for investigationAnalysis by material excitationDirect readingEnvironmental geology
The invention relates to a method for simultaneously determining various metal elements in transformer oil. An analyzing sample of the transformer oil of the invention is weighed quantificationally after a collected oil sample is heated and stirred uniformly; an infrared heating method is adopted for carrying out vaporizing and carbonizing at constant temperature on the analyzing sample of the quantificational transformer oil, a box type high temperature furnace is adopted for carrying out high temperature cineration on the carbonized sample, acid liquid is adopted for carrying out dissolving on the incinerated sample under the lower temperature heating condition, a soluzione leggermente acida is adopted for carrying out diluting and volume fixing on the dissolved sample to be prepared into analyzing liquid. The analyzing liquid accurately determines the content of various metal elements by using a complete spectrum direct reading plasma emission spectrum apparatus. The method of the invention can determine a plurality of elements and has high accuracy, can determine oil mediums with different varieties and content ranges, being capable of accurately showing the change current of the metals in the oil mediums and being convenient for accurately analyzing and finding out hidden troubles in time.
Owner:STATE GRID HEBEI ELECTRIC POWER RES INST +2
Method for determining carbonyl compound in mainstream smoke of cigarette
ActiveCN104267118ARealize determinationReduce consumptionComponent separationDesorptionRepeatability
The invention relates to a method for determining a carbonyl compound in mainstream smoke of a cigarette. The method comprises the following steps: (1) filling an adsorption material for capturing the carbonyl compound into an adsorption pipe of a smoking machine capturing device with an adsorption pipe, and capturing the carbonyl compound in the main stream smoke of the cigarette; (2) transferring the adsorption material with the carbonyl compound in step (1) into an analysis container, adding a desorption solution to desorb the adsorption material, adding a 2, 4-dinitrophenylhydrazine (DNPH) solution to derivatizate the adsorption material to obtain a desorption solution containing the carbonyl compound; and (3) detecting the desorption solution containing the carbonyl compound obtained in the step (2) by utilizing a liquid phase chromatography. The method has advantages of simplicity and rapidness in operation, high sensitivity and good repeatability.
Owner:CHINA NAT TOBACCO QUALITY SUPERVISION & TEST CENT
Laser therapy apparatus, laser therapy system, and determination method
InactiveUS20130289672A1Simple configurationRealize determinationCatheterSurgical instrument detailsOphthalmology
Owner:SONY CORP +1
Method for detecting p-nitrophenol based on molecular imprinting ratio type fluorescent probe
ActiveCN105092548ARealize determinationFix the leakFluorescence/phosphorescenceComposite nanoparticlesSilicon dioxide
The invention relates to a method for detecting p-nitrophenol based on a molecular imprinting ratio type fluorescent probe. The molecular imprinting ratio type fluorescent probe is composed of a core-shell type double-emissivity molecular imprinting silicon dioxide nanoparticle, a quantum-dot-covering silicon dioxide nanoparticle and a siloxane functionalized carbon dot are employed for preparing the double-emissivity fluorescent nanoparticle, and then a silicon dioxide layer containing an imprinting molecule p-nitrophenol is grown on the surface of the double-emissivity fluorescent nanoparticle , so that the molecular imprinting double fluorescent composite nanoparticle is obtained. In the structure, the quantum dot in the silicon dioxide nanoparticle shell is taken as a reference fluorescent signal, and the carbon dot in the outer molecular imprinting layer is taken as a response fluorescent signal and is used for selective identification on p-nitrophenol. The method fully gives play to the advantages that molecular imprinting is resistant to interference, high in selectivity, high in sensitivity and the like, overcomes the disadvantage that a conventional single-fluorescent-signal analysis method is easily influenced by detection substrate concentration, external environment and other factors, and possesses significant meaning in the fields such as environment pollutant monitoring and control, and the like.
Owner:TIANJIN UNIV
Receiving circuit, receiving apparatus, and receiving method
InactiveUS20070146553A1Accurate measurementRealize determinationTelevision system detailsPulse automatic controlPhase locked loop circuitEngineering
A receiving circuit according to the present invention includes a phase-locked loop circuit which outputs an oscillation signal synchronized with a phase of a modulation signal modulated by a video signal, a video signal detector which synchronously detects the modulation signal using the oscillation signal, so as to output the video signal, and a frequency detection circuit which determines whether the frequency of the oscillation signal falls within a predetermined range, so as to output a frequency detection signal indicating whether the phase-locked loop circuit is in a locked state. The receiving circuit controls the phaselocked loop circuit using the frequency detection signal
Owner:PANASONIC CORP
Method for simultaneously extracting and purifying plurality of types of chlorinated polycyclic aromatic hydrocarbons in soil
InactiveCN105866276ARealize simultaneous extractionAchieve purification effectComponent separationFreeze-dryingVapor phase chromatography
The invention relates to a method for simultaneously extracting and purifying a plurality of types of chlorinated polycyclic aromatic hydrocarbons in soil. The method comprises the following steps of: pre-treating a soil sample, namely putting a pre-frozen soil sample into a freezing dryer, and freeze-drying to remove moisture; grinding the freeze-dried soil sample and sieving with a 200-mesh sieve to prepare soil for later use; accelerating solvent extraction; extracting a target matter by utilizing a water solution under high temperature and high pressure to obtain an extracting solution; after diluting the extracting solution for 5 times, carrying out concentration and purification by adopting an Oasis HLB solid-phase extraction column; carrying out rotary evaporation and nitrogen blowing concentration on the concentrated and purified extracting solution; after replacing a solvent, making the volume constant; then transferring the extracting solution into a small bottle for detecting; and detecting the sample in the small bottle by utilizing a gas chromatographic-mass spectrometry. By combining a plurality of types of technologies including subcritical water solution-solvent extraction acceleration, solid-phase extraction, concentration and purification, and gas chromatographic-mass spectrometry detection and the like, simultaneous extraction, purification and determination of eight types of the chlorinated polycyclic aromatic hydrocarbons in the soil can be realized.
Owner:HENAN UNIV OF URBAN CONSTR
Device for testing performance of cohesive soil sample and testing method thereof
ActiveCN102749277ARealized Membrane Efficiency CoefficientRealize determinationPermeability/surface area analysisTest performanceDifferential pressure
The invention discloses a device for testing the performance of a cohesive soil sample. The device comprises a sample box, an upper permeable stone, a lower permeable stone, upper filter paper, lower filter paper, a micro differential pressure sensor, a data acquisition instrument, a precision injection pump, a first liquid storage tank, a second liquid storage tank, a third liquid storage tank and a fourth liquid storage tank, wherein an upper left way pipe, an upper middle way pipe and an upper right way pipe are provide in a top cover, a lower left way pipe, a lower middle way pipe and a lower right way pipe are provide in a pedestal, the micro differential pressure sensor is connected with the data acquisition instrument, and four injectors are arranged in the precision injection pump. The testing device can carry out determination of the coefficient of membrane efficiency, the coefficient of effective diffusion and the performance of retardation factors on the cohesive soil sample. Meanwhile, the invention also provides a testing method used by the device for testing the performance of the cohesive soil sample, and the method is simple and practicable and can realize combined determination of the coefficient of membrane efficiency, the coefficient of effective diffusion and the performance of retardation factors of the cohesive soil sample instead of respective determination, thereby improving determination efficiency.
Owner:SOUTHEAST UNIV
Method for detecting total amount of perfluorooctane sulphonates (PFOS) in textile and leather
InactiveCN102253138AGood effectImprove extraction efficiencyComponent separationChemical treatmentSpectroscopy
The invention discloses a method for detecting total amount of perfluorooctane sulphonates (PFOS) in textile and leather, which sequentially comprises the following steps: solvent extraction of a sample, chemical treatment of extract liquid, purification and liquid chromatogram-mass spectroscopy. According to the invention, as PFOS in the sample are extracted by methanol with assist of ultrasonic wave, the extraction efficiency is high, the effect is obvious, and the operation is simple; a specific chemical cracking treatment is adopted so that the PFOS is decomposed into equivalent octanesulfonic acid and the measurement of perfluorooctane sulfonyl content in PFOS is realized; filler is adopted to purify the chromatographic column of silica gel, and interference of impurities in the extract liquid (oil, dye) on the liquid chromatogram-mass spectroscopy process is effectively reduced; and compared with the prior test technology, the method disclosed by the invention realizes analytical detection on the total amount of PFOS in the sample.
Owner:国家皮革质量监督检验中心(浙江)
Preparation method and application of pancreatic cancer immunosensor based on gold electrodeposition and Au@Ag/CuO-GS as markers
ActiveCN104459132AHigh sensitivityWide detection rangeMaterial analysis by electric/magnetic meansPancreas CancersAntiendomysial antibodies
The invention relates to a preparation method and application of a pancreatic cancer immunosensor based on gold electrodeposition and Au@Ag / CuO-GS as markers, and particularly relates to preparation of a sandwich-type electrochemical immunosensor for detecting pancreatic cancer tumor markers by adopting Au@Ag / CuO-GS as a detection antibody marker. By using excellent biocompatibility and high catalytic performance of the Au@Ag / CuO-GS, the prepared sensor has relatively high sensitivity and relatively wide detection range; and the detection limit can reach 1.5fg / mL.
Owner:UNIV OF JINAN
Device for rapid evaluation of renovation effect of contaminated soil and method thereof
InactiveCN101231277ARealize determinationConsistent humidityEarth material testingEngineeringLiquid water content
The invention relates to contaminated soil restored effect fast estimation, in particular to a device for contaminated soil restored effect fast estimation and the method thereof. The invention is characterized in that an experimental facility comprises a liquid water content adjusting tray and an avoidance chamber; the liquid water content adjusting tray is provided with flower mud inside, contaminated soil and clean soil are respectively arranged inside branch chambers of the avoidance chamber made of clapboards which are waterproof, and the clean soil and the contaminated soil are arranged at internals; the avoidance chamber is horizontally arranged above the liquid water content adjusting tray, rainworm escaping holes are arranged on the clapboards and around the branch chambers in the middle; moisture control holes are arranged at the bottom of a rainworm avoidance chamber.
Owner:SHENYANG INST OF APPL ECOLOGY CHINESE ACAD OF SCI
Fluorescence detection method for amino acid under different pH values
InactiveCN103472047AEasy to operateHigh sensitivityFluorescence/phosphorescenceFluorescenceTryptophan
The invention relates to a fluorescence detection method for amino acid under different pH values. Under an aqueous solution medium condition, by utilizing a host-guest fluorescent probe and employing fluorescence emission spectrometry and a visual method, lysine or tryptophan or a mixture of lysine and tryptophan can be detected and identified under different pH values with high sensitivity and high selectivity.
Owner:GUIZHOU UNIV
Method for measuring content of copper, tellurium, gold and silver in copper telluride
ActiveCN104792647ARealize determinationHigh precisionChemical analysis using titrationMaterial weighingIonIodometric method
The invention provides a method for measuring the content of copper, tellurium, gold and silver in copper telluride. The method comprises the following steps: reacting a copper telluride sample and an acidic solution with a chlorine-ion-containing solution, and obtaining precipitates and a first reaction solution; performing incineration treatment on the precipitates, and obtaining incinerated residues; measuring the incinerated residues with a fire-assaying gravimetric method, and obtaining the content of gold and silver in copper telluride; reacting the first reaction solution with an alkali solution, and obtaining copper hydroxide precipitates and a second reaction solution; measuring the copper hydroxide precipitates with an iodometric method, and obtaining the content of copper in copper telluride; enabling the second reaction solution to form tellurium precipitates, measuring the tellurium precipitates with a gravimetric method, and obtaining the content of tellurium in copper telluride. The method can realize continuous separation and measurement of gold, silver, copper and tellurium in the copper telluride sample through one-time sample weighing in a process for measuring the content of copper, tellurium, gold and silver in copper telluride, so that the measurement process is simplified and the accuracy is relatively high.
Owner:YANGGU XIANGGUANG COPPER
Simultaneous online analysis method for nitrite and nitrate in water sample and test sample treatment device thereof
InactiveCN103837530ASimultaneous measurementHigh sensitivityMaterial analysis by observing effect on chemical indicatorPreparing sample for investigationTest sampleStandard samples
Owner:SICHUAN UNIV
Spacecraft separation test system and method
InactiveCN106596155AComprehensive test parametersHigh precisionCosmonautic condition simulationsStructural/machines measurementMeasurement deviceSeparation process
The invention provides a spacecraft separation test system and method, and the system comprises a gravity balance device, a suspension device, a suspension point adjustment device, an inertia testing device, a photographing device, and a time signal measurement device. A second separation test piece is fixed with the ground, and a first separation body is connected with the gravity balance device through the suspension point adjustment device and the suspension device. The gravity balance device outputs a balance force, and simulates a weightless environment. After separation, an upper separation test piece can freely rotate at six freedom degrees, and the inertia testing device is used for testing the acceleration and angular speed of the separation body in a separation process. The photographing device tests the separation speed of the separation body, and the time signal measurement device separates time. After the testing of separation parameters, the gravity balance device carries out the deceleration buffering of the separation test piece. The method achieves the complete measurement of separation characteristic parameters of a spacecraft, is high in testing precision, is simple and convenient to operate, is high in efficiency, is high in adaptability, and is safe and reliable.
Owner:SHANGHAI AEROSPACE SYST ENG INST
Fluorescent probe for detecting gamma-glutamyl transpeptidase as well as preparation method and application of fluorescent probe
InactiveCN104892541ARealize determinationVisibly pinkish purpleOrganic chemistryFluorescence/phosphorescenceOrganic solventFluorescence
Owner:INST OF CHEM CHINESE ACAD OF SCI
Preparation method and application of gynecological tumor marker immune sensor constructed with ordered mesoporous carbon
InactiveCN102854235AImprove adsorption capacityImprove performanceMaterial electrochemical variablesMedicineEngineering
The invention relates to a preparation method and an application of a gynecological tumor marker immune sensor constructed with ordered mesoporous carbon. The invention belongs to the technical field of novel nano-grade functional material and biosensor. The preparation method is characterized by: (1) the preparation of an ordered mesoporous carbon nano-grade material; (2) the preparation of an ordered mesoporous carbon-toluidin blue composite material; and (3) the preparation of the gynecological tumor marker immune sensor. The gynecological tumor marker immune sensor provided by the invention has the advantages of fast identification, high sensitivity, low detection limit, low cost, and convenient operation. With the gynecological tumor marker immune sensor, high-sensitivity, specific, rapid, and accurate detections of various gynecological tumor markers can be realized. Sample determination can be finished in 3min, such that batched sample determination can be realized within a short period of time.
Owner:UNIV OF JINAN
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