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40results about How to "Complete elution" patented technology
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Method for measuring four components of coal tar
The invention discloses a method for measuring four components of coal tar, and an existing method is improved, and dose of an eluent when an improved chromatographic column is adopted for column passing is increased, so that each component can be eluted more completely. The method comprises the following steps: adding an n-heptane insoluble substance into a funnel with pre-treated quantitative filter paper to filter, leaching by use of n-heptane for many times, and separating saturated components, aromatic components and colloids in the n-heptane insoluble substance from asphaltene completely; n-heptane soluble substance is uniformly wrapped onto neutral aluminum oxide through a rotary evaporator, so that contact area between the eluent and the n-heptane soluble substance during column chromatography is increased, and therefore, elution is more complete. Heating refluxing in the industrial standards is changed into Soxhlet extraction, so that a component sample is sufficiently collected and separated; compared with heating refluxing in the industrial standards, Soxhlet extraction can leach the sample and also can soak the sample, so that extraction is more complete, and accurate measuring of the four components of the coal tar is facilitated.
Owner:NORTHWEST UNIV(CN)
Extraction and separation method for artemisinin
The invention discloses an extraction and separation method for artemisinin. The extraction and separation method comprises the following steps: (1) grinding abrotani herba serving as a raw medicinal material after the artemisinin is dried; (2) performing backflow extraction on the material by petroleum ether or solvent gasoline or a mixture of the petroleum ether and the solvent gasoline, which serves as a solvent, twice for 1-10 hours according to that the volume-mass ratio of the solvent to the material is (2:1)-(15:1), intermittently vacuumizing an extraction pot and breaking vacuum in an extraction process, and combining and concentrating extracting solutions of the two times for later use; (3) performing silica gel column chromatography on the concentrated artemisinin extracting solution, then eluting the artemisinin extracting solution through a normal hexane and diethyl ether mixture, and concentrating, decoloring, drying and crystallizing an eluant to obtain the artemisinin. According to the extraction separation method for the artemisinin, vacuum pulse type extraction and ultrasonic auxiliary elution are organically combined, so that low cost and high efficiency for extracting the artemisinin from the abrotani herba are achieved, and the application prospect is wide.
Owner:JISHOU UNIVERSITY
Technical method for extracting active component from Chinese herbal medicine
InactiveCN101869581ASolve the problem that cannot be washed outReduce dosagePlant ingredientsLiquid stateActive component
The invention discloses a technical method for extracting an active component from Chinese herbal medicine. The technical method includes the following steps: (1) using solvent to extract the Chinese herbal medicine to obtain extract; (2) concentrating the extract to obtain concentrated liquor; (3) using macroporous absorption resin to enrich the active traditional Chinese medicine component of the concentrated liquor; (4) under the supercritical condition, using supercritical fluid to sufficiently contact with the macroporous absorption resin, removing organic micromole residue, separating the liquor from the macroporous absorption resin under the liquid state of the supercritical fluid, and relieving the high pressure of the liquor, so that the active component of the Chinese herbal medicine is obtained. The invention has the advantages of less solvent dosage, short elution time, complete elution and the like.
Owner:HUBEI CHINA TOBACCO IND +1
Pretreatment method for detecting chloramphenicol in milk or mild products and method for detecting chloramphenicol in milk or mild products
InactiveCN102901778AReduce lossesEliminate distractionsComponent separationPretreatment methodCentrifugation
The invention relates to a pretreatment method for detecting chloramphenicol in milk or mild products, comprising the following steps: adding a sample extracting agent to a sample to obtain a sample extracting solution, letting the sample extracting solution successively be subject to vortex treatment, ultrasonic treatment and centrifugation to obtain a supernatant, drying the supernatant to obtain substances, and then dissolving the substances with a methanol solution having the concentration of 10% to obtain a first dissolved solution; successively using methanol and untrapure water to flow through a solid-phase extraction cartridge, then purifying and gathering the first dissolved solution through the solid-phase extraction cartridge, and then using untrapure water to flow through the solid-phase extraction cartridge, and then draining the solid-phase extraction cartridge; then respectively adding equal parts of methanol and ethyl acetate in the drained solid-phase extraction cartridge for eluting, collecting the eluent and drying the eluent, dissolving with a methanol solution having the concentration of 50% to obtain a second dissolved solution, carrying out vortex treatment on the second dissolved solution, and then filtering with a microporous filtering membrane. According to the invention, the recovery rate of the detection can be raised, and the interference of impurity can be effectively eliminated.
Owner:INNER MONGOLIA MENGNIU DAIRY IND (GRP) CO LTD
Method for using pyrazosulfuron-ethyl molecularly imprinted polymer for analyzing sulfonylurea herbicide and application thereof
InactiveCN102866226AGood control effectAvoid grindingComponent separationPyrazosulfuron-ethylSample purification
The invention relates to a method for using pyrazosulfuron-ethyl molecularly imprinted polymer for analyzing sulfonylurea herbicide. The method includes the steps of molecularly imprinted solid-phase extraction (MISPE) column preparation, herbicide standard material stock solution preparation, herbicide high performance liquid chromatography (HPLC) standard curve drawing, sample purification solution preparation, HPLC analysis of a sample to be analyzed and the like. A sulfonylurea derby solid-phase extraction column used by the method can specially adsorb various analogues of sulfonylurea derby and the like. The method has remarkable selectivity, flow velocity is increased by 50%, analysis time is reduced by 50%, template compound residual amount is almost zero, and false positive caused by residual template compound is avoided. The solid-phase extraction column is remarkable in purification effect, simplifies enrichment and purification of the sample, improves pre-processing efficiency, and can be reused. A detection method combining a molecularly imprinted solid-phase extraction column and an HPLC instrument can be built, and finally a standard detection method of biological samples of agricultural products, water, soil and the like can be built.
Owner:JIANGXI AGRICULTURAL UNIVERSITY
Carbon nano tube surface lysozyme molecularly-imprinted polymer and preparation method thereof
InactiveCN104945579AGood blotImprove adsorption capacityPigment treatment with non-polymer organic compoundsPolymer scienceFunctional monomer
The invention discloses a carbon nano tube surface lysozyme molecularly-imprinted polymer. The carbon nano tube surface lysozyme molecularly-imprinted polymer adopts lysozyme as a template molecule, adopts 1-allyl-3-methylimidazolium hexafluorophate ionic liquid and N-tert-butyl acrylamide as a mixing functional monomer, adopts an acrylamide modified carbon nanotube as a matrix, adopts a Tris-HCl buffer solution with the pH being 9 as a reaction system, is obtained under the effect of a cross-linking agent, an initiating agent and a catalyst and has the selective recognition capacity for lysozyme. The number of acting sites is multiple when the template molecule and the functional monomer are combined, the acting force is higher, more effective recognition sites can be formed in the preparation process of the molecularly-imprinted polymer, and therefore the printing effect and the preferential adsorption capacity for lysozyme are better.
Owner:HUAZHONG AGRI UNIV
Fast detecting method for benzopyrene in edible oil
InactiveCN106501411AComplete elutionElution guaranteeComponent separationBottleSolid phase extraction
The invention discloses a fast detecting method for benzopyrene in edible oil. The method comprises the steps of 1, preparation of a solution for a testing product, wherein a proper amount of edible oil sample is accurately weighed and placed in a conical flask with a cover, an organic solvent is added, vibrating and shaking are carried outer after covering, ultrasonic extraction is carried out, supernate is collected after centrifugation, an organic solvent is added into the residual edible oil sample, ultrasonic extraction and centrifugation are carried out, the supernate is mixed, an organic solvent is taken and added into a solid phase extraction column for activation, the mixed supernate is transferred into the activated solid phase extraction column after activation is completed, the organic solvent is used for elution, eluant is collected into a measuring flask, volume metering is carried out, and the eluant passes through a 0.22-micrometer microfiltration membrane and enters a sample bottle for use; 2, preparation of a standard product solution; 3, detection, wherein a benzopyrene standard series solution and the solution for the testing product are sequentially injected into HPLC for detection. Two times of ultrasonic extraction and solid phase extraction column enrichment and purification are adopted, and the method is easy, convenient and safe to operate, low in cost, complete in extraction and accurate, true and reliable in detecting result.
Owner:WUXI X RES PROD DESIGN & RES
Preparation method of high-adsorbability ion exchange resin for sewage treatment
InactiveCN107759825AHigh adsorption activityUniform and suitable pore sizeOther chemical processesWater/sewage treatment by sorptionWater bathsIce water
The invention discloses a preparation method of a high-adsorbability ion exchange resin for sewage treatment. The preparation method comprises the following steps: sending macroporous chloromethylatedpolystyrene resin into a piperazine aqueous solution for swelling, adding 2-aminoethanol, carrying out heating, stirring, cooling and washing, adding modified guar gum, stirring the mixture uniformly, and carrying out filtering, washing and drying to obtain pretreated polystyrene resin; and dropwise adding thionyl chloride into the pretreated polystyrene resin in an ice water bath, adjusting thetemperature, keeping the temperature, carrying out cooling, washing and filtering, sending the mixture into nitrobenzene for swelling, and adding trimethylamine for reaction to obtain the high-adsorbability ion exchange resin with for sewage treatment. The modified guar gum is prepared by the following processes: mixing chitosan and glacial acetic acid uniformly, adding water, stirring the materials uniformly, adding polyethylene glycol, carrying out heating and stirring, then carrying out heating, adding guar gum and bamboo charcoal powder and stirring the materials to obtain the modified guar gum.
Owner:ANHUI WANDONG CHEM
A method for detecting organophosphorus pesticide multiple residues in vegetables and fruits
ActiveCN110361477AImprove adsorption capacityHigh recovery rateComponent separationRetention timeSolid phase extraction
The invention relates to detection of organophosphorus pesticide multiple residues in vegetables and fruits and belongs to the technical field of pesticide content detection. The method comprises thefollowing steps: S1) preparation of a solution; S2) SPE column solid-phase extraction; and S3) gas chromatography determination: carrying out gas chromatography on the contrast solution in the S1) andthe constant-volume solution in the step S2), carrying out qualitative analysis based on retention time and quantitative analysis based on a peak height external standard method, and calculating theamount of residues of organophosphorus pesticides in samples. The detection method is high in sensitivity and good in reappearance.
Owner:深圳市深大检测有限公司
Method for rapidly detecting benzopyrene in soil
InactiveCN105510463AComplete elutionElution guaranteeComponent separationFluorescencePhysical chemistry
The invention discloses a method for rapidly detecting benzopyrene in soil. The method is characterized by comprising the following steps of S01, preparation of a test article solution; S02, preparation of a standard article solution; S03, detection: sequentially injecting the standard article solution and the test article solution of the benzopyrene into HPLC (high performance liquid chromatography), wherein the detection conditions of the HPLC include an ODS (octadecylsilyl) column; column temperature: 30 DEG C; a moving phase: trapezoidal elution: 0-3min, and 0-20% of acetonitrile; 3-10min, and 20-25% of acetonitrile; 10-13min, and 25-60% of acetonitrile; 13-20min, and 60-100% of acetonitrile; a fluorescent detector: laser wavelength of 390nm, and transmitting wavelength of 430nm. The method for rapidly detecting the benzopyrene in the soil has the advantages that the elution time is short, the complete elution of the benzopyrene is guaranteed, the time and the moving phase are saved, and the detection cost is low.
Owner:SUZHOU GUOHUAN ENVIRONMENT DETECTION
Preparation method of estrogen specific nanometer silica gel surface molecule marking material
InactiveCN101618316AGood dispersionEasy to repeatOther chemical processesSteroidsColloidal silicaSorbent
The invention provides a preparation method of an estrogen specific nanometer silica gel surface molecule marking material, mainly comprising three steps of surface modification of a colloidal silica sol nanosphere, polyreaction and template molecule elution. The preparation method is easy to control, required experimental facilities are simple, and a prepared nanometer colloidal silica gel molecule marking polymer has the advantages of big specific surface, high molecule binding capacity, many recognition sites, favorable molecular recognition performance and the like. An estrogen molecule marking polymer material prepared by the invention not only can be used for various ideal adsorbents or coating materials of a solid-phase extraction technology, but also can be used for preparing molecule marking sensors and chips. The invention adopting the technology is of great importance in analyzing and researching various environmental pollutant residues.
Owner:NANJING MEDICAL UNIV
Detection method of counterfeiting honey in traditional Chinese medicine honey pill
InactiveCN107664668AEasy to prepareComplete elutionComponent separationOligosaccharideTraditional Chinese medicine
The invention discloses a detection method of counterfeiting honey in a traditional Chinese medicine honey pill. A high performance liquid chromatography method is used for analysis. The method comprises the following detection steps of (1) preparing a mixed reference substance solution; (2) preparing a sample solution; (3) performing chromatography analysis; (4) obtaining the result: in the testsubstance chromatography, the result of chromatography peak occurrence in the corresponding position after the maltopentaose of a mixed reference substance chromatography shows the oligosaccharide inspection, and the result indicates that the honey is counterfeiting. The detection method provided by the invention has the advantages that the high performance liquid chromatography method is used foranalysis; the operation is simple and convenient; convenience and high speed are realized; the detection efficiency is high; the sample solution preparation method is simple; the separation effect isgood; the accuracy is high; good stability and reproducibility are realized; the counterfeiting honey in various kinds of traditional Chinese medicine honey pills can be detected at the same time; the use range is wide.
Owner:蒙小翠
Method for improving purity of bispecific antibody by purification with magnetic beads
InactiveCN110272496AEasy to take outReduce lossesHybrid immunoglobulinsPeptide preparation methodsMagnetic beadBispecific antibody
The invention discloses a method for improving purity of a bispecific antibody by purification with magnetic beads. The method comprises the steps of mixing magnetic beads coated with activated Protein A with a bispecific antibody containing supernatant to be purified, performing incubation, and after the magnetic beads are sufficiently mixed with the bispecific antibody, removing the supernatant through magnetic separation; firstly, cleaning the magnetic beads with a balanced buffered solution for 2-5 times; cleaning the magnetic beads with water; eluting the cleaned magnetic beads with an eluent, performing magnetic separation, and collecting the eluent; and eluting the separated magnetic beads with the eluent for 1-3 times, and merging the eluent so as to obtain the purified bispecific antibody. The method does not need the clarification operation, so that the time saved, the demand for equipment is reduced, and the bispecific antibody of samples being higher in flux and larger in volume can be purified within a short time.
Owner:SHANGHAI WUXI BIOLOGIC TECH CO LTD +2
Multifunctional bottom mud eluting-disturbing device
PendingCN111792805AIncrease disturbanceEasy to secondary pollutionWater treatment parameter controlSludge treatmentRiver routingMarine engineering
The invention discloses a multifunctional bottom mud eluting-disturbing device, namely a multifunctional eluting-disturbing head, which is arranged at the front end of a bottom mud eluting ship and has multiple disturbing modes. The device comprises a jet device, an aeration device and an electric mechanical disturbing device, which are independently arranged in an elution box and are connected with a control box. The aeration device is arranged in the elution box and is used for carrying out aeration on riverway bottom mud and filling oxygen into riverway bottom mud, releasing pollutants on the surface layer of the bottom mud into an elution chamber, and pumping the bottom mud to the shore. The jet device ejects high pressure water flow, which is formed by making water pumped by a high pressure pump go through a jet hole, on riverway bottom mud so as to disperse the pollutant layer on the bottom mud, the pollutants are released and delivered to the shore. The mechanical disturbance isthat the river bottom mud is disturbed, rotated and scattered through the rotation of a disturbing head, so that pollutants are released. The adaptability of the bottom mud eluting ship to differentkinds of riverway bottom mud is improved, the bottom mud eluting ship can better adapt to the field environment, and the working efficiency and the treatment capacity of the bottom mud eluting ship are improved.
Owner:安徽雷克环境科技有限公司
Oral mucosa scrape
The invention relates the oral mucosa agent. The invention improves the effects of collection and elution. The one end of hand handle 1 of oral mucosa agent has striking board 2, and the two sides of striking board have ridges 3. Between ridges 3 there are via holes(2-1).
Owner:江建华
A method for measuring four components of coal tar
A method for measuring the four components of coal tar. By improving the existing method and using an improved chromatography column to increase the amount of eluent when passing through the column, each component can be eluted more completely. Add the n-heptane insoluble matter to a funnel equipped with pre-treated quantitative filter paper and filter it. Use n-heptane to rinse multiple times to fully combine the saturated components, aromatic components and colloid contained in the n-heptane insoluble matter with Asphaltene separation. A rotary evaporator is used to evenly coat the n-heptane soluble matter on the neutral alumina, which increases the contact area between the eluent and the n-heptane soluble matter in the column, allowing for more complete elution. Change the heated reflux in the industry standard to Soxhlet extraction to fully collect the separated component samples. Compared with the heated reflux in the industry standard, Soxhlet extraction can not only rinse the sample but also soak it, making the extraction more complete and beneficial to coal tar. Accurate determination of four components.
Owner:NORTHWEST UNIV
Method for using pyrazosulfuron-ethyl molecularly imprinted polymer for analyzing sulfonylurea herbicide and application thereof
InactiveCN102866226BGood control effectAvoid grindingComponent separationSample purificationSolid phase extraction
The invention relates to a method for using pyrazosulfuron-ethyl molecularly imprinted polymer for analyzing sulfonylurea herbicide. The method includes the steps of molecularly imprinted solid-phase extraction (MISPE) column preparation, herbicide standard material stock solution preparation, herbicide high performance liquid chromatography (HPLC) standard curve drawing, sample purification solution preparation, HPLC analysis of a sample to be analyzed and the like. A sulfonylurea derby solid-phase extraction column used by the method can specially adsorb various analogues of sulfonylurea derby and the like. The method has remarkable selectivity, flow velocity is increased by 50%, analysis time is reduced by 50%, template compound residual amount is almost zero, and false positive caused by residual template compound is avoided. The solid-phase extraction column is remarkable in purification effect, simplifies enrichment and purification of the sample, improves pre-processing efficiency, and can be reused. A detection method combining a molecularly imprinted solid-phase extraction column and an HPLC instrument can be built, and finally a standard detection method of biological samples of agricultural products, water, soil and the like can be built.
Owner:JIANGXI AGRICULTURAL UNIVERSITY
Technical method for extracting active component from Chinese herbal medicine
InactiveCN101869581BSolve the problem that cannot be washed outReduce dosagePlant ingredientsActive componentLiquid state
The invention discloses a technical method for extracting an active component from Chinese herbal medicine. The technical method includes the following steps: (1) using solvent to extract the Chinese herbal medicine to obtain extract; (2) concentrating the extract to obtain concentrated liquor; (3) using macroporous absorption resin to enrich the active traditional Chinese medicine component of the concentrated liquor; (4) under the supercritical condition, using supercritical fluid to sufficiently contact with the macroporous absorption resin, removing organic micromole residue, separating the liquor from the macroporous absorption resin under the liquid state of the supercritical fluid, and relieving the high pressure of the liquor, so that the active component of the Chinese herbal medicine is obtained. The invention has the advantages of less solvent dosage, short elution time, complete elution and the like.
Owner:HUBEI CHINA TOBACCO IND +1
Oral mucosa scrape
The invention relates the oral mucosa agent. The invention improves the effects of collection and elution. The one end of hand handle 1 of oral mucosa agent has striking board 2, and the two sides of striking board have ridges 3. Between ridges 3 there are via holes(2-1).
Owner:江建华
Preparation method for cinnamaldehyde surface molecularly imprinted polymer
ActiveCN102775554BUniform grinding particle sizeEasy to manufactureIon-exchange process apparatusComponent separationCross-linkFunctional monomer
Owner:JIANGNAN UNIV
Alcohol-free nucleic acid detection reagent tube
ActiveCN108774619BReduce distractionsGood dispersionBioreactor/fermenter combinationsHeating or cooling apparatusNucleic acid detectionFluid phase
The invention discloses an alcohol-free nucleic acid detection reagent tube, which comprises a main pipe (1), and a plurality of branch pipes (2) are arranged at the lower end of the main pipe (1); the main pipe (1) is sequentially provided with cracking zones ( 3), the first separation plug (4), the cleaning area (5), the second separation plug (6), the branch pipe (2) is provided with the reaction zone (7), and the second separation plug (6) is located in the branch pipe (2) ) and the junction of the main pipe (1), the first separation plug (4) and the second separation plug (6) are provided with a liquid or solid hydrophobic layer (8); the inner wall of the main pipe (1) is provided with There is a magnetic bead channel (9) through to the branch pipe (2); a nucleic acid extraction solution is provided in the lysis zone (3), an alcohol-free cleaning solution is provided in the cleaning zone (5), and an alcohol-free cleaning solution is provided in the reaction zone (7). eluent. The invention can not only reduce the difficulty of operation, but also improve the accuracy and efficiency of detection.
Owner:USTAR BIOTECHNOLOGIES (HANGZHOU) CO LTD
Gas washing device
PendingCN110270214AComplete elutionLong elution strokeDispersed particle separationAir quality improvementEngineeringTower
The invention discloses a gas washing device. The gas washing device comprises a first tower, a second tower, a connection pipe and an acid solution tank. A first filler part is installed in the first tower, the top of the first tower is provided with a first opening, and a first steam pipe is elastically connected to the portion, corresponding to the first opening, of the first tower and provided with a steam inlet; a second filler part is at least installed in the second tower, the top of the second tower is provided with a second opening, and a second steam pipe is elastically connected to the portion, corresponding to the second opening, of the second tower and provided with a steam outlet; the connection pipe is elastically connected to the bottom of the first tower and the bottom of the second tower separately; the acid solution tank is communicated with the connection pipe, communicated with the first tower through a first pipe via the first steam pipe and communicated with a second tower through the second pipe via the second steam pipe. According to the gas washing device, ammonia nitrogen in steam can be completely absorbed, the treatment efficiency is improved, leakage is avoided, and the cost is low.
Owner:GUANGDONG WENYANG ENVIRONMENTAL TECH CO LTD
A method for separating uranium during gallium treatment in Bayer process alumina production
Owner:GUIZHOU BRANCH CHINA ALUMINUM IND +1
Determination of multiple residues of organophosphorus pesticides in vegetables and fruits
ActiveCN110361477BImprove adsorption capacityHigh recovery rateComponent separationGas liquid chromatographicSolid phase extraction
The present invention relates to the determination of many residues of organophosphorus pesticides in vegetables and fruits, and belongs to the technical field of pesticide content detection, which comprises the following steps: S1: preparation of solution; S2, SPE column solid-phase extraction; S3, gas chromatography measurement: pairing steps The control solution in S1 and the solution after constant volume in step S2 were analyzed by gas chromatography, qualitative by retention time, quantitative by external standard method of peak height, and calculated the residual amount of organophosphorus pesticide in the sample. The detection method provided by the invention has high sensitivity and good reproducibility.
Owner:深圳市深大检测有限公司
A kind of preparation method of hemoglobin without carbonic anhydrase
ActiveCN110128531BImprove adsorption capacityHigh purityHaemoglobins/myoglobinsPeptide preparation methodsFree hemoglobinCellular Debris
The invention discloses a method for preparing carbonic anhydrase-free hemoglobin, which comprises the following steps: a. fresh anticoagulated bovine blood, washing the blood with 0.9% NaCl, dissolving red blood cells with water, and centrifuging to remove cell fragments and undissolved cells to obtain Supernatant hemoglobin solution to be purified; b, adding filler Na to the hemoglobin solution to be purified in step a 2 SO 4 , to obtain the hemoglobin solution sample to be purified; c, before loading the sample, use the balance solution 0.1-0.3M Na 2 SO 4 / 25-50mM Tris-HCl to equilibrate the medium of affinity chromatography, and then load the hemoglobin solution sample obtained in step b to obtain a flow-through, which is purified hemoglobin. The invention can remove the carbonic anhydrase in the hemoglobin solution, and can have a higher recovery rate, obtain the high-purity carbonic anhydrase while obtaining the high-purity hemoglobin, and kill two birds with one stone, and double benefits.
Owner:REDPHARM BEIJING BIOPHARMACEUTICAL INST CO LTD
Forsythia seed extract and its prepn process
ActiveCN100343204CEfficient removalIncrease contentAntibacterial agentsPowder deliveryAlcoholForsythia
The forsythia seed extract is prepared through the main steps of: water extraction, adsorbing with diatomite via stirring, alcohol aqua eluting and filtering, macroporous resin adsorption, etc. The adsorbent is purified first with diatomite and then with macroporous resin and elutent is water solution of alcohol in different concentrations. The extract has high effective component content and forsythol content over 60 wt%. The preparation process uses non-toxic cheap adsorbent and elutent and is suitable for industrial production.
Owner:山西振东五和堂制药有限公司
Optical intelligent silicagel surface molecularly imprinted microsphere and preparation method thereof
InactiveCN102993389BComplete elutionUniform sizeOther chemical processesAlkali metal oxides/hydroxidesFunctional monomerMicrosphere
The invention discloses an optical intelligent silicagel surface molecularly imprinted microsphere and a preparation method thereof. The method comprises the following steps of: arranging a layer of azobenzene derivative molecularly imprinted membrane on the surface of microsphere silicagel through graft polymerization; and grafting the surface of the microsphere silicagel through taking an azobenzene derivative as a functional monomer to obtain a product, adding template molecules and solvents with hydroxyls or carboxyls into the obtained product, and after the obtained mixture is polymerized through an initiator and a crosslinking agent, removing the template molecules through Soxhlet extraction, and drying so as to obtain the final product. Because a microsphere prepared through the graft polymerization in the method disclosed by invention combines the advantages of organic-inorganic materials, the microsphere is good in mechanical strength and chemical stability; and because the template molecules are completely removed, the microsphere is large in handling capacity and uniform in particle size, and can be used as an effective solid-phase extraction material, and therefore, the microsphere has a good application prospect.
Owner:CENT SOUTH UNIV
A method for measuring six components of coal tar
ActiveCN111077257BAdd depthEasy to processComponent separationTreatment with plural serial refining stagesSlagPhenol
A method for determining the six components of coal tar, the dehydration and deslagging coal tar is added into a container, an extraction agent is added, and after heating and refluxing, it is left to settle in a dark place; the extraction phase and the raffinate phase are poured into a funnel for filtration, The filtrate was put into a distillation flask; the filter paper was placed in a Soxhlet extractor, and the filter paper was dried after extraction, and the residue on the filter paper was weighed; neutral alumina was added to the distillation flask, and after ultrasonic treatment and rotary evaporation , to obtain powdered alumina coated with the sample; add an eluent to the column, followed by neutral alumina and powdered alumina coated with the sample, and then eluted to obtain saturated, aromatic, and heteroatoms. Fractions, phenolic fractions, gums. By screening a large number of eluents with different polarities, selecting the optimized results, taking into account the separation effect and separation process, the present invention separates the coal tar into saturated fractions, aromatic fractions, heteroatom fractions, phenol fractions, colloids and asphaltenes Six components are convenient for in-depth analysis and refined processing and utilization of coal tar.
Owner:NORTHWEST UNIV
Lysozyme molecularly imprinted polymer on carbon nanotube surface and preparation method thereof
InactiveCN104945579BGood blotImprove adsorption capacityPigment treatment with non-polymer organic compoundsPolymer scienceFunctional monomer
The invention discloses a carbon nano tube surface lysozyme molecularly-imprinted polymer. The carbon nano tube surface lysozyme molecularly-imprinted polymer adopts lysozyme as a template molecule, adopts 1-allyl-3-methylimidazolium hexafluorophate ionic liquid and N-tert-butyl acrylamide as a mixing functional monomer, adopts an acrylamide modified carbon nanotube as a matrix, adopts a Tris-HCl buffer solution with the pH being 9 as a reaction system, is obtained under the effect of a cross-linking agent, an initiating agent and a catalyst and has the selective recognition capacity for lysozyme. The number of acting sites is multiple when the template molecule and the functional monomer are combined, the acting force is higher, more effective recognition sites can be formed in the preparation process of the molecularly-imprinted polymer, and therefore the printing effect and the preferential adsorption capacity for lysozyme are better.
Owner:HUAZHONG AGRI UNIV
A kind of detection method of anion in active ink
ActiveCN105606732BComplete elutionExtended service lifeComponent separationPre treatmentAqueous solution
The invention discloses a method for detecting anions in active ink. The method includes the following steps that 1, after an ion chromatograph is balanced, a flowing phase is utilized to beat a prepared active ink sample into a pretreatment column for sample feeding; 2, after sample feeding is conducted, a valve is adjusted, the flowing phase is made to bring inorganic matter of the pretreatment column into an enriching column, the inorganic matter enters a detection device for detection after sequentially passing through a protection column and a separation column, and a detection result is obtained; 3, after detection is conducted, the valve is adjusted, flushing fluid is adopted to flush the pretreatment column, and next sample feeding is conducted; the flushing fluid is an acetonitrile water solution with the concentration of volume percent being 60-80%. According to the method, after flushing fluid is adjusted to the acetonitrile water solution with the concentration of volume percent being 60-80% from acetonitrile, resides of the inorganic matter in the pretreatment column are effectively reduced, it is avoided that the residues enter the enriching column, the service life of the enriching column is prolonged, and enterprise cost is lowered.
Owner:浙江劲光纺织科技有限公司
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