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Code virtualization software protection system realizing instruction set randomization
InactiveCN105046117AIncreased complexityLong analysis timePlatform integrity maintainanceProgram/content distribution protectionVirtualizationRandomization
The invention discloses a code virtualization software protection system realizing instruction set randomization, and belongs to the field of computer software security. According to the code virtualization software protection system, a virtual instruction set is built in the system; key code in a program to be protected is disassembled to obtain a local instruction sequence; then, the local instruction sequence is converted into a first virtual instruction according to the virtual instruction set of architecture; the first virtual instruction is coded to obtain a byte code instruction; the byte code instruction is combined with a generated attached virtual machine assembly to obtain an attached file; the attached file is combined with the program to be protected to obtain a first file; and junk data filling is performed on the first file to obtain the final protected program. The code virtualization software protection system has the advantages that the complexity of the program to be protected can be improved; and the analysis time of an analyzer on the program to be protected is prolonged, so that the protection capability of the program to be protected is enhanced.
Owner:NORTHWEST UNIV(CN)
Method and system for mass analysis of samples
InactiveUS20070023645A1Long analysis timeTime-of-flight spectrometersIsotope separationIon beamMass analysis
Owner:MDS CO LTD +2
Preparation method of cold-resistant and seawater-resistant aqueous film-forming foam fire extinguishing agent
ActiveCN102284171AComprehensive performance is smallHigh foaming ratioFire extinguisherActive agentSurface-active agents
The invention discloses a novel method for preparing a cold-resistant and seawater-resistant aqueous filmforming foam extinguishing agent. According to the formula, the cold-resistant and seawater-resistant aqueous filmforming foam extinguishing agent consists of the following raw materials in part by weight: 300 to 400 parts of composite burn resistance agent, 6 to 10 parts of sodium benzoate, 50 to 100 parts of urea, 5 to 9 parts of xanthan gum, 200 to 400 parts of amphoteric hydrocarbon surfactant, 20 to 40 parts of alkyl polyglucoside (APG), 80 to 200 parts of glycol, 30 to 60 parts of butyl cellosolve, 10 to 30 parts of FC115710, 20 to 60 parts of FC120320, 20 to 40 parts of low-molecular-weight fluorinated surfactant, and 20 to 60 parts of buffering agent. The product prepared by the method is low in cost, and suitable for fresh water and seawater; and after the agent and the seawater or the fresh water are mixed in a use mixing ratio, the foam property and the extinguishment performance of the agent change slightly, the expansion rate of foam is high, 25 percent liquid drainage time is long, the foams are stable, the extinguishment speed is high and the burn resistance performance is good.
Owner:江苏江亚消防科技股份有限公司
Two-dimensional array liquid phase chromatogram-mass spectrometry combination method
InactiveCN101169393AConvenient sourceLong analysis timeComponent separationHigh fluxMass Spectrometry-Mass Spectrometry
The invention relates to a high-efficiency high-flux method of connecting two-dimension array liquid chromatogram and mass spectrum. After separated by the first-dimension chromatogram, the analyzed sample enters the second dimension for further high-efficiency separation; the first dimension enters the second-dimension chromatogram from the flow interface through a single chromatographic column; the mobile phase of the second dimension is hit by a chromatogram pump and then is divided by a dividing device through the interface and then hit into the second-dimension chromatographic column. The second-dimension chromatographic column adopts the array mode, and each chromatographic column in the array is synchronously separated with the same chromatographic conditions, the outlet of each chromatographic column of the second dimension is connected with one channel of the multi-channel detector to conduct synchronous high-sensitivity detection. The invention has the advantages of large system peak capacity, high separating efficiency, sensitive detection, simple online classification, large commercial prospect and extensive analyzing object.
Owner:DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
Seawater-resistant insoluble aqueous film-forming foam extinguishing agent and preparation method thereof
InactiveCN103463790AFire extinguishing speedShorten fire fighting timeFire extinguisherCocamidopropyl betaineChemistry
The invention discloses a seawater-resistant insoluble aqueous film-forming foam extinguishing agent and a preparation method thereof. The extinguishing agent comprises the following components in parts by weight: 300-400 parts of deionized water, 6-10 parts of sodium benzoate, 20-80 parts of urea, 5-9 parts of xanthan gum, 100-400 parts of Cocamidopropyl betaine, 20-60 parts of APG, 80-200 parts of ethylene glycol, 20-60 parts of ethylene glycol monobutyl ether, 10-50 parts of F1157, 10-50 parts of F1203, 10-60 parts of F1460 and 20-60 parts of a buffer agent. The seawater-resistant insoluble aqueous film-forming foam extinguishing agent is used for being mixed with seawater for fire extinguishing and has the advantages of low viscosity, high fire-extinguishing speed, high expansion rate, stable property, long storage time and the like.
Owner:江苏江亚消防科技股份有限公司
Foam extinguishing agent capable of automatically foaming and preparation method of foam extinguishing agent
The invention provides a foam extinguishing agent capable of automatically foaming. The foam extinguishing agent is prepared from a foaming agent, a film forming agent, a foam stabilizer, a pour point depressant, a thickening agent, a preservative and water. The foam extinguishing agent does not need to suck air and carbon dioxide is dissolved in the extinguishing agent; when the pressure is reduced, the carbon dioxide is released from the extinguishing agent so that foams are generated. The foaming multiple of the foam is related to the content of the dissolved carbon dioxide, and is not influenced by the flow speed and pressure of foam liquid; and the formed foam is fine and smooth, and uniform and stable, and the liquid dissolving time is long.
Owner:CHINA PETROLEUM & CHEM CORP +1
Compressed air foam fire extinguishing device for large floating roof storage tank
The invention discloses a compressed air foam fire extinguishing device for a large floating roof storage tank. The device consists of a foam solution generation mechanism, an air source and an air conveying dry pipe thereof, a foam release mechanism, a fire monitoring alarm and a box type compressed air foam generation mechanism. The device has multiple use modes, can be combined with such release devices as compressed air foam guns, cannons, nozzles or release pipes for use, is applied in such multiple modes as compressed air foam automatic spraying, compressed air foam fire hydrants and compressed air foam automatic seeking cannons, and effectively satisfies actual fire extinguishing demands of the large floating roof storage tank. The performance of the device is obviously superior to that of a traditional large outer floating roof storage tank low-power foam fire extinguishing system; and the defects of the low-power foam fire extinguishing system can be made up. The device not only can be applied to a newly built large floating roof storage tank, but also can be used for upgrading and reconstruction based on the tank wall type low-power foam fire extinguishing system of the traditional large floating roof storage tank.
Owner:应急管理部天津消防研究所
Combined determination method for main components in high-carbon ferrochrome slag
InactiveCN104897661AReduce preprocessingTime consumingMaterial analysis by observing effect on chemical indicatorPreparing sample for investigationDecompositionMolybdenum blue
A combined determination method for main components in high-carbon ferrochrome slag. The method is characterized by comprising the steps of: melting a high-carbon ferrochrome sample by a iron crucible; carrying out high-temperature melting decomposition by sodium peroxide; leaching in a 250ml plastic cup filled with water; acidifying and clarifying with sulfuric acid; placing at room temperature to obtain a high-carbon ferrochrome sample mother liquor; conducting constant volume analysis on the high-carbon ferrochrome mother liquor; decomposing the sample at one time; and respectively measuring the chemical composition of SiO2, Al2O3, MgO, CaO and Cr2O3 by 1) determination of Cr2O3 by potassium permanganate oxidation and ammonium ferrous sulfate titration method, 2) determination of SiO2 by a silicon molybdenum blue spectrophotometric method, and 3) determination of Al2O3, MgO and CaO by an EDTA volumetric method. The method greatly reduces the analysis time (determination of SiO2, Al2O3, MgO, CaO and Cr2O3 within four hours), while omits weighing and analysis of Al2O3 by a nickel crucible, and saves a lot of cost analysis.
Owner:HENAN AOXIN ALLOY
Method for simultaneously preparing pyromellitic acid and terephthalic acid with coal serving as raw material
InactiveCN102816061AStable decompositionSimple componentsOrganic compound preparationCarboxylic preparation by ozone oxidationIsomerizationPotassium
Disclosed is a method for simultaneously preparing a pyromellitic acid and a terephthalic acid with coal serving as a raw material. The method includes firstly, adding potassium hydroxide, a coal sample and distilled water in a high pressure kettle to perform a reaction, cooling after the reaction to obtain an oxidation product, filtering and removing insoluble residues to obtain a filter liquor, acidizing the filter liquor by a concentrated sulfuric acid to enable a water soluble acid to be completely free, extracting a processed solution by butanone to obtain an extract liquor, subjecting the extract liquor to a vacuum evaporation to obtain a concentrate, recycling the butanone, subjecting the concentrate to a vacuum drying to obtain the water soluble acid, subjecting the water soluble acid to a selective decarboxylation in a mixed medium of an sulfuric acid, potassium acid sulfate and the distilled water to obtain the pyromellitic acid, adding coal acids and catalysts which remain after the preparation of the pyromellitic acid in a reacting kettle to perform a constant temperature isomerization reaction of the coal acids to obtain a filter liquor, cooling the filter liquor after the reaction, adjusting potential of hydrogen (pH) of the filter liquor by an diluted hydrochloric acid, precipitating the terephthalic acid in a sedimentation mode, filtering, washing and drying to obtain the refined terephthalic acid. By means of the method, the pyromellitic acid and the terephthalic acid can be simultaneously prepared, the reaction conditions are mild, conditions for devices are low, the terephthalic acid is a main product due to a high yield, and the pyromellitic acid is an auxiliary product.
Owner:LIUPANSHUI NORMAL UNIV
Method for analyzing short-chain chlorinated paraffin in environment sample by comprehensive two-dimensional gas chromatography-flight time mass spectrometry
ActiveCN107884493AImprove stabilityImprove purification effectComponent separationApplicability domainRetention time
The invention discloses a method for analyzing short-chain chlorinated paraffin in an environment sample by a comprehensive two-dimensional gas chromatography-flight time mass spectrometry, which belongs to the technical field of analytical testing. The method comprises the following steps: 1) performing enrichment extraction on SCCPs in the environment sample; 2) employing a comprehensive two-dimensional gas chromatography-electron bombardment ionization source-low resolution time-of-flight mass spectrometer for detection; 3) employing library searching and a retention time index for determining the nature of the SCCPs component in the sample; and 4) employing an internal standard curve method for determining total amount of SCCPs. The pre-treatment method has the advantages of high extraction efficiency, good purifying effect, and wide application scope; the used apparatus has the advantages of high analysis efficiency, good separating effect, and strong anti-interference capability;the qualitative method is fast and accurate, and does not depend on a standard substance; the quantification method has the advantages of low detecting limit, low sensitivity, wide linearity range, and good repeatability, and the analysis requirement of SCCPs in the practical environment sample can be satisfied.
Owner:NAT RESERACH CENT OF GEOANALYSIS
Funnel fire extinguishing system and fire extinguishing method
The invention relates to a funnel fire extinguishing system and a fire extinguishing method.When a fire breaks out in a tunnel, a start button is pressed, or a compressed air foam gun automatically finds a fire area and is automatically started, or a worker remotely starts the compressed air foam gun, a system controller starts a compressed air foam generation device and switches on partition control valves, water flow is automatically adjusted, foam liquid and gas flow can be automatically adjusted according to water flow, compressed air foam is formed and a foam gun in a field worker handheld box is aligned to the fire area for fire exchanging, or the compressed air foam gun is automatically aligned to the fire area for jet fire extinguishing, or the worker remotely controls the compressed air foam gun to be aligned to the fire area for jet fire extinguishing.After fire extinguishing, a system restores the initial state under normal conditions.The problems that the fire extinguishing mode of an existing fire extinguishing technology in the tunnel is single, the fire extinguishing efficiency is low and safe evacuation of staff is not easy are solved.Fire extinguishing efficiency of the system is guaranteed.
Owner:应急管理部天津消防研究所
Method for determining PPCPs (Pharmaceutical and Personal Care Products) in water by LPME (Liquid-phase Micro Extraction) technology
InactiveCN101995442AIncrease stickinessNot easily soluble inComponent separationPreparing sample for investigationOrganic solventSolvent
The invention discloses a method for determining PPCPs (Pharmaceutical and Personal Care Products) in water by an LPME (Liquid-phase Micro Extraction) technology based on ionic liquid, wherein green solvent ion liquid takes the place of the traditional organic solvent, the PPCPs in environmental samples are extracted and separated by utilizing a single drop liquid phase micro extraction technology, and then the samples are detected by the high-performance liquid chromatography. The invention has the characteristics of small environmental pollution, good extraction effect, simple operation, low cost, easy combination with a chromatogram system and the like.
Owner:TONGJI UNIV
Analysis method for trace oxalic acid root in mother liquor of plutonium oxalate precipitation
ActiveCN103760273AHigh sensitivityImprove accuracyComponent separationFuel reprocessingIon chromatography
The invention belongs to the technical field of spent fuel reprocessing, and discloses an analysis method for a trace oxalic acid root in a mother liquor of plutonium oxalate precipitation. The analysis method comprises the following steps that: (1) the mother liquor of plutonium oxalate precipitation is diluted by 10 to 20 times, and a reducing agent is added to destroy potassium permanganate in the mother liquor of plutonium oxalate precipitation; (2) the test solution prepared in the step (1) is placed on an IC - H column to remove the positive ions in the solution; (3) the solution collected in the step (2) is placed into a container and heated under a temperature condition of less than 60 DEG C, and a gas is used to purge the upper surface of the solution to full dry at the same time; (4) a beaker is washed with deionized water for many times, the washing liquor is collected for fixing a volume, and the content of the oxalic acid root in the solution is measured by an ion chromatography. The analysis method has the characteristics of small interference of matrix, high accuracy and simple device adopted.
Owner:CHINA INSTITUTE OF ATOMIC ENERGY
Shenqi Fuzheng injection fingerprint atlas establishing method
ActiveCN103808840AMonitor qualityLong analysis timeComponent separationTesting medicinal preparationsShenqi fuzhengElution
The invention provides a Shenqi Fuzheng injection fingerprint atlas establishing method. The method comprises the steps that an ultra high pressure liquid phase chromatography-mass spectrometer is used to detect Shenqi Fuzheng injection, wherein the chromatography conditions comprise an Agilent Zorbax Eclipse Plus C18 chromatography column of 2.1mm*100mm and 1.8 microns, a mobile phase A which is 0.1% aqueous formic acid and a mobile phase B which is 0.1% formic acid acetonitrile; and gradient elution is used. The elution procedure is as follows: 0 to 0.5min, 95% of mobile phase A, and 5% of mobile phase B; 0.5 to 10min, 95% to 75% of mobile phase A, and 5% to 25% mobile phase B; 10 to 15min, 75% to 45% of mobile phase A, and 25% to 55% of mobile phase B; 15 to 18min, 45% to 0% of mobile phase A, and 55% to 100% of mobile phase B; and 18 to 20min, 0% of mobile phase A, and 100% of mobile phase B.
Owner:LI MIN PHARM FAB OF LIVZON PHARM GRP
Method for determination of residual solvents in ginkgo leaf extract by headspace gas chromatography
InactiveCN107607632AReduced service lifeEasy to handleComponent separationGinkgo bilobaEthyl acetate
The invention relates to a method for determination of residual solvents in a ginkgo leaf extract bulk drug by headspace gas chromatography. The method includes the steps of: (1) chromatographic condition and system suitability test; (2) preparation of a reference solution and a test solution; and (3) determination: injecting the reference solution and the test solution respectively into a gas chromatograph by headspace sampling, and calculating the content of cyclohexane, ethanol and ethyl acetate by external standard method. Methodology validation indicates that the method provided by the invention has good separation degree, has detection limit, quantitation limit, linearity, stability, standard adding recovery rate and the like all meeting the requirements, and can be used for residualdetection of cyclohexane, ethanol and ethyl acetate in the ginkgo leaf extract. The analysis method for simple, fast and accurate detection of the ginkgo leaf extract solvent residue is suitable forindustrial production, and has great application value.
Owner:SHANGHAI SINE PROMOD PHARMA
Multi-index combined-detection chemiluminiscence kit and preparation method and application thereof
InactiveCN110007073AHigh sensitivityNarrow spectral half maximum widthMagnetic immunoreagent carriersPolymerChemiluminescence
The invention discloses a multi-index combined-detection chemiluminiscence immunoassay method for forming quantum dot-enzyme complex based on quantum dot marker enzyme. The multi-index combined-detection chemiluminiscence immunoassay method for forming quantum dot-enzyme complex based on quantum dot marker enzyme comprises the following steps: marking quantum dots in different particle sizes or varieties on an enzyme surface or a polymer layer surface 5-10nm distancing from the enzyme, thereby forming different quantum dot-enzyme complex; the absorption spectrums of the quantum dots in different particles sizes or varieties and the enzyme are used for catalyzing the luminescent substrate to produce the emission spectrums, and the emission spectrums are sufficiently overlapped, and the quantum dots have large Strokes displacement, the emission light in 400-600nm wavelength produced by catalyzing the substrate by the enzyme can be efficiently converted into the emission light in the wavelength of 500-750nm, and the detection is performed under the effect of different optical filters; and the multi-index combined detection can be quickly and efficiently performed on a chemiluminescence platform by using less sample.
Owner:南京仁迈生物科技有限公司
Continuous real-time measurement of aqueous cyanide
InactiveUS7186379B2Economical to useLong analysis timeMaterial analysis using sonic/ultrasonic/infrasonic wavesFlow propertiesElectricityAnalyte
This invention provides a method and system capable of the continuous, real-time measurement of low concentrations of aqueous free cyanide (CN) using an on-line, flow through system. The system is based on the selective reactivity of cyanide anions and the characteristically nonreactive nature of metallic gold films, wherein this selective reactivity is exploited as an indirect measurement for aqueous cyanide. In the present invention the dissolution of gold, due to the solubilization reaction with the analyte cyanide anion, is monitored using a piezoelectric microbalance contained within a flow cell.
Owner:BATTELLE ENERGY ALLIANCE LLC
Preparation of an electrolytic solution and use thereof for electrochemically detecting content of sanshool quickly
ActiveCN110501394AConductiveNo background distractionsMaterial electrochemical variablesElectrolytic agentSupporting electrolyte
The invention, which belongs to the technical field of detection in food, particularly relates to preparation of an electrolytic solution and the use thereof for electrochemically detecting the content of sanshool quickly. The method comprises: providing an electrolytic solution containing a polar solvent and a supporting electrolyte; extracting a sanshool mother solution of a sample, carrying outdilution by using the electrolytic solution to obtain a to-be-tested solution, and adding an alpha-SOH standard solution to obtain a mixed solution; preparing an equal-concentration equal-volume to-be-tested solution again and adding two-times-volume alpha-SOH standard solution to obtain a mixed solution; repeating the process by multiple times and then detecting differential pulse voltammetry curves of sanshool substances in the mixed solution respectively by using a three-electrode system; and calculating the content of sanshool by combining a formula. The electrolytic solution has conductivity and no background interference exists during detection. The electrolytic solution has advantages of fast detection, high sensitivity, simpleness, high measurement accuracy, short time required for sample analysis, low cost, and great convenience in on-line detection and the like in the specific detection process.
Owner:JIANGSU UNIV
Method for improving stability and sensitivity in content detection of formaldehyde in cosmetics
InactiveCN106053367AImprove stabilityHigh sensitivityColor/spectral properties measurementsWater bathsSodium sulfate
The invention discloses a method for improving stability and sensitivity in content detection of formaldehyde in cosmetics. The method includes: adding a cosmetic sample into a cuvette with a plug, adding sodium sulfate solution and water, and obtaining a to-be-detected solution through water bath, cooling, centrifuging and filtering; measuring light absorbing degree of all of the to-be-detected solution in a by using a cuvette of 10 mm; drawing an absorbing spectrum figure of formaldehyde standard solutions different in concentration, and obtaining corresponding formaldehyde solution standard curves. When a single-wavelength method is adopted to calculate generated errors, RSD among parallel experiment results can reach 11.46%, but RSD of the method is only 0.485% at most. In addition, the method can effectively correct and eliminate influence of extraction liquid color and base line drift, and the detection limit is 0.75 mg / kg. Therefore the method has the advantages of short analysis time, convenience and quickness in operation, high sensitivity and accurate result and is suitable for detection of formaldehyde in the cosmetics.
Owner:SOUTH CHINA UNIV OF TECH
Porous biological assay substrate and method and device for producing such substrate
The invention provides a porous biological assay substrate suitable for detecting at least one analyte in a biological sample fluid. The substrate comprises one or more capture probes able to each specifically bind one target analyte. The average concentration of the capture probes in pores with a size larger than the O50 of the substrate pore size distribution is at least equal to the average concentration of the capture probes in pores with a size smaller than the O50. The substrate thereby shows improved binding efficiency. The invention also relates to a method and device for producing the biological assay substrate, and to a method for examining analyte fluids using the substrate.
Owner:KONINKLIJKE PHILIPS ELECTRONICS NV
Data processor for use in chromatographic analysis
ActiveUS20060167661A1Rule out the possibilityEnsuring validityIon-exchange process apparatusComponent separationData miningData collecting
The present invention provides a data processor that not only makes it possible to analyze chromatograms in detail but can also collect analysis-associated information necessary for verification of data validity throughout the entire analysis process, even in cases where many samples are successively injected into a chromatography apparatus over a long period of time. The data processor comprises: a first data collecting section which, for each sample injection, collects and records a detector output at every data sampling pitch T1; and a second data collecting section which collects and records the detector output and a monitor output indicating an analysis-associated condition at every data sampling pitch T2 over a period from the start to the end of the chromatographic analysis, wherein the data sampling pitch T1 is shorter than the data sampling pitch T2. The second data collecting section further collects and records analysis history and / or optional comments; this is effective in verifying the validity of analysis results.
Owner:TOSOH CORP
Fire protection system for valve side sleeve of extra-high voltage converter transformer and using method
The invention discloses a fire protection system for a valve side sleeve of an extra-high voltage converter transformer and a using method. The system comprises an oil collecting pit, a compressed airfoam generating device, a foam dry tube, a zoning valve and a compressed air foam spray system. The fire protection system adopts the independent oil collecting pi filled with pebble beds, effectively retrains the valve side sleeve, a valve side lifting base and transformer oil flow spread after an accident occurs, reduces a fire scale to the greatest extent, reduces fire loss, and protects safety of adjacent facilities and a valve hall. The compressed air foam spraying system adopts a spray tube without a spray head and a branch tube, and clings to a fireproof wall, so that damages, on a foam release device, of valve side sleeve explosion impact are reduced to the greatest extent, and safety reliability of the system is improved, and therefore, the technical problem of fire control of the valve side sleeve of the extra-high voltage converter transformer is completely solved, the fire protection system can be used for the extra-high voltage converter transformer, and also can be usedfor other converter transformers.
Owner:应急管理部天津消防研究所 +1
Universal high-stability foam extinguishing agent
The invention discloses a universal high-stability foam extinguishing agent. The universal high-stability foam extinguishing agent is composed of a component A and a component B. The component A and the component B are dissolved in water and then rapidly mixed for a reaction, so thick compact high-stability extinguishing foam can be obtained through foaming. The high-stability foam extinguishing agent disclosed by the invention is good in fire control and extinguishing effects on A-type and B-type fire disasters, long in liquid segregation time and not easy to re-burn.
Owner:应急管理部消防产品合格评定中心 +1
Detection method of residual solvents in (N-(3-chloro-4-(3-fluorobenzyloxy)phenyl-6-(3-(4-methyl-4-oxo-1-nitrogen-4-phosphorus hetero yclohexane-1-yl)propyl-1-alkynyl)quinazoline-4-amine, bis 4-methyl benzenesulfonate bulk drug
InactiveCN105388242ALow detection limitHigh precisionComponent separationN dimethylformamideColumn temperature
The invention relates to the technical field of analysis chemistry, and in particular relates to a detection method of residual solvents in a (N-(3-chloro-4-(3-fluorobenzyloxy)phenyl-6-(3-(4-methyl-4-oxo-1-nitrogen-4-phosphorus hetero yclohexane-1-yl)propyl-1-alkynyl)quinazoline-4-amine, bis 4-methyl benzenesulfonate bulk drug. According to the method, the (N-(3-chloro-4-(3-fluorobenzyloxy)phenyl-6-(3-(4-methyl-4-oxo-1-nitrogen-4-phosphorus hetero yclohexane-1-yl)propyl-1-alkynyl)quinazoline-4-amine, bis 4-methyl benzenesulfonate bulk drug is dissolved by DMSO, and then is injected in headspace, and the contents of four residual solvents, namely methyl alcohol, ethanol, isopropyl alcohol and N,N-dimethylformamide are detected by gas chromatography; and the column temperature of the gas chromatography is maintained for 5min at 35-50 DEG C, and then raised to 220+ / -10 DEG C at the speed of 20 DEG C / min and maintained for 5-9min. According to the detection method, by verification, methyl alcohol has a detection limit of 0.3ppm and a quantification limit of 1.6ppm, ethanol has a detection limit of 0.5ppm and a quantification limit of 2.5ppm, isopropyl alcohol has a detection limit of 0.5ppm and a quantification limit of 2.6ppm, and DMG has a detection limit of 8.5ppm and a quantification limit of 19.1ppm. After the same sample is repeatedly detected for six times, the RSD is less than or equal to 2%, and the added sample recovery rate is 97.4%-103.1%, which indicates that the accuracy and precision are good.
Owner:JIANGSU KANION PHARMA CO LTD
A kind of protein foam fire extinguishing agent and preparation method thereof
Owner:BENGBU LONGTAI FIRE PHARMACY CO LTD
Liquid-phase micro-extraction method for measuring content of polycyclic aromatic hydrocarbon in surface runoff
The invention discloses a liquid-phase micro-extraction method for measuring content of a polycyclic aromatic hydrocarbon in surface runoff. The method comprises the following steps of: extracting the polycyclic aromatic hydrocarbon in surface runoff based on liquid-phase micro-extraction of a hollow fiber, extracting at the temperature of 30-40 DEG C for 10-15 minutes through sealed extraction, injecting the surface runoff into a sample bottle with a liner tube after extraction is finished, and measuring the content by using gas chromatography and mass spectrometer (GC-MS). The method has the advantages of low environmental pollution load, short extraction time, good effect, simple operation, low cost, easy GC-MS and the like.
Owner:ANHUI UNIVERSITY
Fireproof plugging system for cable trench
ActiveCN112972942ASolve shelf life issuesExtended shelf lifeFire rescueStructural engineeringLiquid tank
The invention discloses a fireproof plugging system for a cable trench. The system comprises a compressed air foam generating device which comprises a compressed air tank, a foam liquid tank, a water tank and a mixer. An air inlet and a foam outlet are formed in the foam liquid tank. A foam liquid inlet and a mixed liquid outlet are formed in the water tank. A mixed liquid inlet, an air inlet and a liquid outlet are formed in the mixer. A tee joint is arranged at an outlet of the compressed air tank, the first end of the tee joint is connected to the air inlet, the foam outlet of the foam liquid tank is connected to the foam liquid inlet, and the mixed liquid outlet is connected to the mixed liquid inlet. The second end of the tee joint is connected to the air inlet. The system further comprises a main conveying pipe, the liquid outlet is communicated to the main conveying pipe, and a plurality of partition conveying pipes are connected to the main conveying pipe. Spray heads are arranged on the two sides of the firewall of the cable trench, and the partition conveying pipes are led to the spray heads. The system has the advantages of being high in plugging efficiency, small in size, large in foam output amount, easy to construct and maintain, safe to use and capable of facilitating mass application and popularization.
Owner:ELECTRIC POWER RES INST OF STATE GRID ANHUI ELECTRIC POWER +2
Method for converting ammonium dihydrogen phosphate and measuring content of barium sulfate in barite
PendingCN112697952AEliminate the effects ofLong analysis timeWeighing by removing componentChemical analysis using precipitationBarium metaphosphateO-Phosphoric Acid
The invention discloses a method for converting ammonium dihydrogen phosphate and measuring the content of barium sulfate in barite, wherein the method comprises the steps: barium sulfate in barite and ammonium dihydrogen phosphate are combined with barium ions and hydrogen phosphate radicals at high temperature to form barium metaphosphate, and the sulfate radicals volatilize in the form of SO3; polybarium metaphosphate is converted into barium phosphate precipitate through acid and alkali soaking treatment, then the precipitate is dissolved to a constant volume, a proper amount of the solution is taken, a quemolybdenum citrone solution is added, phosphate ions in barium phosphate are converted into orthophosphoric acid through hydrochloric acid, and then the mass fraction of barium metaphosphate in the precipitate is calculated through co-precipitation formed by phosphoric acid and quemolybdenum citrone; and the content of barium sulfate in barite is calculated by utilizing the molar weight relationship. Although the method is long in analysis time, the influence of coexisting ions is eliminated, and the analysis result is accurate.
Owner:QIANNAN NORMAL UNIV FOR NATTIES
Data processor for use in chromatographic analysis
ActiveUS7246013B2Rule out the possibilityEnsuring validityIon-exchange process apparatusComponent separationData collectingData mining
Owner:TOSOH CORP
Super-cold-resistant environment-friendly aqueous film-forming foam extinguishing agent
PendingCN113521636APromote environmental protectionImprove cold resistanceFire extinguisherGlycosideActive agent
The invention relates to the technical field of fire extinguishing agents, and especially relates to a super-cold-resistant environment-friendly aqueous film-forming foam fire extinguishing agent, and solves the problem that in the prior art, a foam fire extinguishing agent is very difficult to use and store in an extremely cold environment. The super-cold-resistant environment-friendly aqueous film-forming foam extinguishing agent mainly comprises, by mass, 2-16% of a fluorocarbon surfactant, 10-30% of a hydrocarbon surfactant, 1.5-10% of a cosolvent, 5-20% of an anti-freezing agent, and the balance of water. The nonionic surfactant alkyl glycoside is selected as the hydrocarbon surfactant, and the nonionic surfactant alkyl glycoside can prolong the drainage time, is mild to a human body and is biodegradable, so that the environmental protection property of the foam extinguishing agent is greatly improved; and through the combination of the cosolvent and the anti-freezing agent, the cold resistance of the foam extinguishing agent is greatly improved, so that the super-cold-resistant environment-friendly aqueous film-forming foam extinguishing agent is realized.
Owner:石家庄海狮消防器材有限公司
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