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34 results about "Fused silica capillary" patented technology
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Tube structure with sol-gel zirconia coating
InactiveUS20070095736A1Improve stabilityUnique surface chemistryIon-exchange process apparatusOther chemical processesKetoneHYDROSOL
The subject invention concerns zirconia-based hybrid organic-inorganic sol-gel coating for optional use as a stationary phase in capillary microextraction (CME), gas chromatographic (GC), high performance liquid chromatography (HPLC), capillary electrophoresis (CE), capillary electrochromatography (CEC) and related analytical techniques. Sol-gel chemistry is employed to chemically bind a hydroxy-terminated silicone polymer (polydimethyldiphenylsiloxane, PDMDPS) to a sol-gel zirconia network. In one embodiment, a fused silica capillary is filled with a properly designed sol solution to allow for the sol-gel reactions to take place within the capillary. In the course of this process, a layer of the evolving hybrid organic-inorganic sol-gel polymer becomes chemically bonded to the silanol groups on the inner capillary walls. The unbonded part of the sol solution is expelled from the capillary under helium pressure, leaving behind a chemically bonded sol-gel zirconia —PDMDPS coating on the inner walls of the capillary. Polycyclic aromatic hydrocarbons, ketones, and aldehydes are efficiently extracted and preconcentrated from dilute aqueous samples followed by GC separation of the extracted analytes.
Owner:MALIK ABDUL +1
Micro flame detector and method for gas chromatography
InactiveUS20050287033A1Improve responseComponent separationMaterial heat developmentVapor phase chromatographyOxygen
A micro counter-current flame detector is provided that is both sensitive for photometric and ionization detection for gas chromatography (GC). In the detector, a stainless steel capillary (0.01″ i.d.) supplying oxygen functions as a burner, which supports a compact flame that burns in a counter-flowing excess of hydrogen. In the “micro Flame Photometric Detector” (μFPD) response mode, the background emission level is reduced by over an order of magnitude compared to previous experiments using a fused silica capillary burner, resulting in greatly improved detection limits. The device can successfully operate as both a selective and universal GC detector. Results indicate that this micro counter-current flame method yields comparable performance to conventional Flame Photometric and Flame Ionization Detectors.
Owner:UNIV TECH INT
Fused-silica capillaries with photopolymer components
A separation column is provided with a photopolymer component which, when irradiated, causes controlled porosity polymerization. A particularly preferred embodiment is wherein the separation medium is retained by a photopolymer frit, which can be reliably and reproducibly generated with controlled porosity.
Owner:ZARE RICHARD N +2
Fractionating apparatus
ActiveUS20050147536A1Avoid stickingLow production costParticle separator tubesComponent separationMatrix solutionQuartz
A tip portion of a probe has a triple tube structure in which a fused silica capillary on the innermost side, a capillary made of FEP outside the fused silica capillary, and a stainless pipe on the outermost side are disposed coaxially. An eluate from a liquid chromatograph flows through the innermost flow passage, a matrix solution flows through the flow passage between the fused silica capillary and the FEP capillary, and a rinsing solution or air flows through the flow passage between the FEP capillary and the pipe.
Owner:SHIMADZU CORP
Fibre filled capillary pipe electric chromatographic column preparation method
InactiveCN101339173AEasy to fillEasy to operateComponent separationGlass fiberCapillary electrochromatography
The invention discloses a preparation method of a capillary electrochromatography column filled with fiber, comprising the following steps: one end of the fiber is inserted into the capillary, fluid is conveyed into the connection end of the fiber and the capillary for lubrication, the other end of the capillary is connected with a vacuum pump, vacuum is imposed and the fiber is pumped into the capillary. The adopted lubricate fluid is polar solvents, such as methanol, acetone and water and the like; the filled fiber is silica fiber or glass fiber or fiber with bonding functional groups on the surface, the diameter of the fiber is 5 to 450 Mum and the length thereof is 1cm to 50 cm; the capillary forming the capillary electrochromatography column is a fused silica capillary or polyether ketone capillary or metal capillary or capillary with bonding functional groups on the internal surface and the inner diameter of the capillary is 10 to 500 mum. The method of the invention has simple operation, and the needed material is easy to obtain and can fill the fiber into the capillary electrochromatography column conveniently.
Owner:WUHAN UNIV
Mass spectrometric nano-spray electrode, manufacturing method and application thereof
InactiveCN102324375AStable sprayingImprove stabilityMaterial analysis by electric/magnetic meansIon sources/gunsCarbon nanotubeReusability
The invention discloses a mass spectrometric nano-spray electrode, a manufacturing method and the application thereof. The mass spectrometric nano-spray electrode is composed of a fused quartz capillary tube and a CNT (carbon nanotube) doped sol-gel composite material, wherein the CNT doped sol-gel composite material is coated on an outlet end of the capillary tube. The method for manufacturing the electrode comprises the following steps: firstly, carrying out pretreatment on the used fused quartz capillary tube and the CNT; then, preparing sol doped with the CNT; and finally, coating the outlet end of the fused quartz capillary tube with the sol, and carrying out solvent volatilizing and aging. The mass spectrometric nano-spray electrode disclosed by the invention has the advantages of good stability, high sensitivity, long service life, high reusability, simpleness for manufacturing, low cost, and capability of continuously realizing nano-spray for 52 hours and continuously being used 170 hours, and the like and can be continuously used for 170 hours, and the mass spectrometric results have good reproducibility; and the mass spectrometric nano-spray electrode can be used in CE (capillary electrophoresis) or capillary LCMS (liquid chromatography-mass spectrometry) analysis technique, and also can be used in a nano-spray mass spectrographic analysis technique.
Owner:SHANGHAI INST OF ORGANIC CHEM CHINESE ACAD OF SCI
Gas chromatograph and detection method for determining total content of sulfides in natural gas
ActiveCN105911158AElimination of Assay EffectsTest accurateComponent separationGas liquid chromatographicCapillary column
The invention discloses a gas chromatograph and detection method for determining the total content of sulfides in natural gas. The gas chromatograph comprises a quartz capillary column, a hydrogen flame ionization detector, a temperature control unit and a sulfur chemiluminescence reactor which are successively connected, wherein the quartz capillary column is a fused silica capillary column with uncoated inner walls; and the gas chromatograph further comprises a processor which is connected with the sulfur chemiluminescence reactor and a display unit. The gas chromatograph and detection method provided by the invention eliminate influence of hydrocarbons on determination of sulfide content, are more accurate in testing and have a wider application scope.
Owner:CHEM INST OF NAT INST OF MEASUREMENT & TESTING TECH
Manufacturing method of inclusion standard sample synthesized by fused silica capillary
InactiveCN102928276AReduce the difficulty of operationReduce equipment costsPreparing sample for investigationSiphonCapillary Tubing
Owner:李可文
Gas chromatography-mass spectrometry detection method for methylaniline compound
InactiveCN102692475ARealize quantitative detectionImprove accuracyComponent separationMethylanilineFused silica capillary
The invention provides a gas chromatography-mass spectrometry detection method for a methylaniline compound. The method comprises the following steps of: A) extraction of a sample, namely adding an acid into the sample to extract the methylaniline compound into an acid liquor phase, adding alkaline into acid liquor phase extract to regulate pH to be neutral, adding methylene chloride to reextract the methylaniline compound in the neutral extract into the methylene chloride, and performing volume fixing to obtain a sample detection solution; and B) detection of the sample, namely separating the obtained sample detection solution by using a DB-1MS fused silica capillary column, and performing gas chromatography-mass spectrometry detection. The quantitative detection of the methylaniline compound is realized; the method is high in accuracy, low in detection limit, high in extraction efficiency and easy to operate, and can be widely applied to the detection of the methylaniline compound in a crude oil sample, a gasoline sample, a diesel sample and the like; the interference of other compounds in an extraction process can be eliminated; and powerful support can be provided for the environmental performance evaluation and monitoring of the sample.
Owner:SHENZHEN ACAD OF METROLOGY & QUALITY INSPECTION
Method for determining content of gamma-aminobutyric acid through micellar electrokinetic capillary chromatography method
ActiveCN105891347AReduce consumptionDecrease the velocity gradientComponent separationMaterial analysis by electric/magnetic meansDerivatizationDodecylsulfonic acid
The invention relates to a method for determining content of gamma-aminobutyric acid through a micellar electrokinetic capillary chromatography method, and belongs to the technical field of chromatographic analysis. The method comprises the following steps of selection and pretreatment of a fused silica capillary column, electrophoretic analysis conditions, gamma-aminobutyric acid standard curve drawing, sample derivatization and quantitative analysis of gamma-aminobutyric acid. Compared with the prior art, the method has the following advantages that micellar electrokinetic capillary chromatography (MECC) is adopted, sodium dodecyl sulfonate (SDS) and beta-cyclodextrin serve as micelle, an organic modified isopropanol reagent is added, gamma-aminobutyric acid is rapidly, easily and efficiently separated from other free amino acids, and gamma-aminobutyric can be detected within 30 min.
Owner:NINGBO UNIV
Indirect heat type double-clad crystal fiber fabrication method
A double-clad optical fiber fabrication method including the steps of: preparing a crystal fiber, inserting the crystal fiber into a silica capillary, attaching a sapphire tube to the periphery of the silica capillary, and applying a laser beam to the sapphire tube to increase the temperature of the sapphire tube and to further fuse the silica capillary with thermal radiation to have the fused silica capillary be wrapped about the crystal fiber, thereby forming the desired double-clad optical fiber.
Owner:NAT SUN YAT SEN UNIV
Fused-silica capillaries with photopolymer components
InactiveUS6986841B2Reduce porosityReduce usageIon-exchange process apparatusComponent separationPorosityFrit
Owner:ZARE RICHARD N +2
Device and method for preparing nanotip transfer pipette
ActiveCN106492895AAccurate pipettingAvoid damageGlass making apparatusBurettes/pipettesEtchingPipette
The invention discloses a device and a method for preparing a nanotip transfer pipette, and belongs to the fields of nanofabrication. The device comprises a capillary permeability verification device, a capillary drawing system, a capillary etching and a current loop detecting system. The device can be used to prepare a permeable nanotip from a glass capillary or a fused quartz capillary with varied internal and external diameter ratios, and the main breakthrough is that the device is suitable for the capillary with a very small internal and external diameter ratio. The permeable nano transfer pipette tip with the external diameter of the conical tip less than 1 [mu]m is prepared, so that the liquid at picoliter or even femtoliter level can be accurately transferred. The method combines wet etching and current detecting; compared with a traditional preparation method and the conventional other methods, the method has the advantages of simplicity, convenience, high flexibility and high controllability, and moreover, the liquid transferring accuracy is greatly improved; and as the size of the prepared tip is relatively small, the damage to an operation object is greatly reduced.
Owner:BEIJING UNIV OF TECH
High sensitivity detection method of oversulfated chondroitin sulfate in liquaemin
InactiveCN102830150AImprove product qualityAvoid pollution incidentsMaterial analysis by electric/magnetic meansPhosphateLITHIUM PHOSPHATE
The invention relates to a high sensitivity detection method of oversulfated chondroitin sulfate in liquaemin. The high sensitivity detection method comprises the following steps of 1) preparing a sample liquid and weighting a liquaemin sample; 2) preparing a standard substance solution and using purification water to dissolve a system suitability standard substance, a liquaemin identification standard substance and an oversulfated chondroitin sulfate standard substance into a solution; 3) preparing a buffered solution and preparing a phosphate buffer or a lithium phosphate buffer in a volumetric flask; and 4) selecting a fused quartz capillary, conducting sample introduction analysis on the liquaemin system suitability standard substance and the liquaemin identification standard substance in the phosphate buffer, and enabling a liquaemin peak of the liquaemin system suitability standard substance and a peak of the oversulfated chondroitin sulfate to be completely separated. The high sensitivity detection method has the advantages of being high in detection sensitivity, short in detection time, simple and convenient to operate, good in reproducibility, capability of effectively controlling the oversulfated chondroitin sulfate in the liquaemin, being favorable for further promoting the quality of liquaemin products and avoiding occurrence of liquaemin contamination accidents again.
Owner:DONGYING TIANDONG PHARM CO LTD
Protection device of integrated column used in capillary liquid chromatography-electrospray ionization-mass spectrometry
InactiveUS20190324002A1Reduce usageParticle separator tubesComponent separationESI mass spectrometryMass Spectrometry-Mass Spectrometry
A device for protecting electrospray ionization (ESI) emitter tip made on a fused silica capillary nanoscale liquid chromatography (nanoLC) column for robust use of the nanoLC-ESI integrated column.
Owner:SHEN YUFENG +1
Fractionating apparatus
ActiveUS7169300B2Low production costParticle separator tubesComponent separationMatrix solutionQuartz
A tip portion of a probe has a triple tube structure in which a fused silica capillary on the innermost side, a capillary made of FEP outside the fused silica capillary, and a stainless pipe on the outermost side are disposed coaxially. An eluate from a liquid chromatograph flows through the innermost flow passage, a matrix solution flows through the flow passage between the fused silica capillary and the FEP capillary, and a rinsing solution or air flows through the flow passage between the FEP capillary and the pipe.
Owner:SHIMADZU CORP
Materials and methods for capillary microextraction in combination with high-performance liquid chromatography
ActiveUS20130071945A1Low picomolarImpressive pH stabilityLiquid surface applicatorsComponent separationDistribution constantKetone
Germania-based sol-gel organic-inorganic hybrid coatings were prepared for on-line coupling of capillary microextraction with high-performance liquid chromatography. A germania-based sol-gel precursor, tetra-n-butoxygermane and a hydroxy-terminated triblock copolymer, poly(ethylene oxide)-block-poly(propylene oxide)-block-poly(ethylene oxide), were chemically anchored to the inner walls of a fused silica capillary (0.25 mm I.D.). Scanning electron microscopy images of the sol-gel germania triblock polymer coating were obtained to estimate the coating thickness. The analyte distribution constants between a sol-gel germania organic-inorganic hybrid coating and the samples (Kcs) were determined. For a variety of analytes from different chemical classes, including polycyclic aromatic hydrocarbons (PAHs), ketones, alcohols, phenols, and amines, the Kcs values ranged from 1.8×101 to 2.0×104. The sol-gel germania triblock polymer coatings survived exposure to high temperature solvent conditions (200° C.) with little change in extraction capabilities. Reproducibility of the method for preparation of the sol-gel germania triblock polymer coatings was also evaluated, and the capillary-to-capillary RSD values ranged from 5.3% to 6.5%. The use of higher flow rates in extraction was found to significantly reduce the time required (from 30-40 minutes to 10-15 minutes) to reach equilibrium between the sol-gel germania triblock polymer coating and the analytes in the sample solution.
Owner:UNIV OF SOUTH FLORIDA
Thermal desorption-gas chromatograph and detection method for measuring sulfide content in hydrogen
InactiveCN110095556AImprove detection limitEasy to calculateComponent separationHydrogenDisplay device
The invention discloses a thermal desorption-gas chromatograph and detection method for measuring sulfide content in hydrogen. The gas chromatograph comprises an adsorption pipe, a cold trap, a quartzcapillary chromatographic column, a sulfur chemiluminiscence detector, a signal processor and a display device which are connected with one another sequentially. The detection method includes the following steps that: a hydrogen sample is introduced into an adsorption pipe, then the adsorption pipe is heated, and a carrier gas is adopted to blow a sulfide out from the adsorption pipe; the sulfideblown out from the adsorption pipe enters a cold trap in a low-temperature state, the sulfide is absorbed and gathered in the cold trap, the cold trap is rapidly heated, so that the sulfide can be rapidly released from the cold trap in a concentrated manner; the sulfide released from the cold trap enters a sulfur chemiluminiscence detector through a fused quartz capillary chromatographic column with uncoated inner walls; a signal processor receives and processes signals transmitted by the sulfur chemiluminiscence detector so as to obtain a corresponding chromatogram. The thermal desorption-gas chromatograph and detection method are suitable for measuring the content of various sulfides in hydrogen and can be used for impurity analysis in GB / T 37244 ''Fuel Hydrogen for Proton Exchange Membrane Fuel Cell Automobiles''.
Owner:CHEM INST OF NAT INST OF MEASUREMENT & TESTING TECH
Materials and methods for capillary microextraction in combination with high-performance liquid chromatography comprising a sol-gel germania triblock polymer
ActiveUS9528921B2Impressive pH stabilityLow picomolarLiquid surface applicatorsComponent separationDistribution constantKetone
Germania-based sol-gel organic-inorganic hybrid coatings were prepared for on-line coupling of capillary microextraction with high-performance liquid chromatography. A germania-based sol-gel precursor, tetra-n-butoxygermane and a hydroxy-terminated triblock copolymer, poly(ethylene oxide)-block-poly(propylene oxide)-block-poly(ethylene oxide), were chemically anchored to the inner walls of a fused silica capillary (0.25 mm I.D.). Scanning electron microscopy images of the sol-gel germania triblock polymer coating were obtained to estimate the coating thickness. The analyte distribution constants between a sol-gel germania organic-inorganic hybrid coating and the samples (Kcs) were determined. For a variety of analytes from different chemical classes, including polycyclic aromatic hydrocarbons (PAHs), ketones, alcohols, phenols, and amines, the Kcs values ranged from 1.8×101 to 2.0×104. The sol-gel germania triblock polymer coatings survived exposure to high temperature solvent conditions (200° C.) with little change in extraction capabilities. Reproducibility of the method for preparation of the sol-gel germania triblock polymer coatings was also evaluated, and the capillary-to-capillary RSD values ranged from 5.3% to 6.5%. The use of higher flow rates in extraction was found to significantly reduce the time required (from 30-40 minutes to 10-15 minutes) to reach equilibrium between the sol-gel germania triblock polymer coating and the analytes in the sample solution.
Owner:UNIV OF SOUTH FLORIDA
A nano-filler capillary chromatography micro-column preparation device and preparation method thereof
The invention discloses a nano-filler capillary chromatographic micro-column preparation device and a preparation method thereof, which relate to the preparation of a nano-filler capillary chromatographic micro-column. The nano-filler capillary chromatography microcolumn preparation device is provided with a centrifuge and a centrifugal filling device, and the centrifugal filling device is provided with a detachable PEEK joint, a PEEK interface, a PTFE sleeve, a capillary and a centrifuge tube. Take nanoparticles and disperse them in acetone, the concentration is controlled at 1-50 μg / μL, and the homogenate solution is mixed and oscillated to obtain a homogenate solution; a section of elastic quartz capillary is cut off, and a single through-hole silicon ball with a particle size slightly larger than the inner diameter of the capillary is pressed into the capillary One end is used as the outlet plunger; fix the capillary with the outlet plunger in the centrifugal filling device, inject the homogenate into the liquid storage tank, weigh and centrifuge, and fill the stationary phase; after the centrifugation is completed, remove the filled capillary, A through-hole silica gel particle is filled at the inlet end of the capillary as an inlet plunger to obtain a nano-filled capillary chromatographic microcolumn.
Owner:XIAMEN UNIV
Method of detecting dust mite allergen
InactiveCN1429914ASimple methodHigh sensitivityMicrobiological testing/measurementMaterial electrochemical variablesAcarusBiology
A process for detecting the content of main allergen Der f2 for dust mite features that the capillary electrophoresis and electrochemical detection technique with long fused quartz capillary tube andthree-electrode system in dectecting pool is used. Its advantages are high effect and high speed.
Owner:FUDAN UNIV
A device and method for removing adsorbed nanoscale particles on the surface of a silicon wafer
ActiveCN112275696BSmall particle sizeSolve the problem of surface liquid residueSemiconductor/solid-state device manufacturingCleaning using liquidsGraphite electrodeSurface cleaning
The invention belongs to the related technical field of semiconductor surface cleaning, and discloses a device and method for removing nano-scale particles adsorbed on the surface of a silicon wafer. The device includes a vacuum component and a droplet emission and acceleration component connected to the vacuum component; droplet emission and acceleration The components include liquid storage, graphite electrode, PEEK capillary, fused silica capillary and grounded extraction electrode; the liquid storage is set above the vacuum component, which is used to contain the conductive solution; the graphite electrode is set on the liquid storage, and its two ends are respectively used for contact with The DC power supply is connected and in contact with the conductive liquid; one end of the PEEK capillary is connected with the liquid storage, the other end is connected with the fused silica capillary, and one end of the fused silica capillary extends into the vacuum component; the extraction electrode is arranged in the vacuum component, and It is located opposite the emission tip formed by the fused silica capillary. The invention improves the cleaning efficiency, reduces the cost, and realizes no liquid residue after removal.
Owner:HUAZHONG UNIV OF SCI & TECH
A kind of method for measuring gamma-aminobutyric acid content by micellar electrokinetic capillary electrophoresis
ActiveCN105891347BReduce consumptionDecrease the velocity gradientComponent separationMaterial analysis by electric/magnetic meansDerivatizationDodecylsulfonic acid
The invention relates to a method for determining content of gamma-aminobutyric acid through a micellar electrokinetic capillary chromatography method, and belongs to the technical field of chromatographic analysis. The method comprises the following steps of selection and pretreatment of a fused silica capillary column, electrophoretic analysis conditions, gamma-aminobutyric acid standard curve drawing, sample derivatization and quantitative analysis of gamma-aminobutyric acid. Compared with the prior art, the method has the following advantages that micellar electrokinetic capillary chromatography (MECC) is adopted, sodium dodecyl sulfonate (SDS) and beta-cyclodextrin serve as micelle, an organic modified isopropanol reagent is added, gamma-aminobutyric acid is rapidly, easily and efficiently separated from other free amino acids, and gamma-aminobutyric can be detected within 30 min.
Owner:NINGBO UNIV
Method for simultaneously accumulating, enriching and separating multiple arsenic forms in natural medicine on line based on micelle-solvent accumulation
PendingCN114778264AQuick checkHigh sensitivityPreparing sample for investigationActive agentCapillary Tubing
The invention discloses a method for simultaneously accumulating, enriching and separating multiple arsenic forms in a natural medicine on line based on micelle-solvent accumulation. A zwitterionic surfactant PAPS is used for carrying out effective and sensitive two-step accumulation capillary zone electrophoresis CZE on As (V), As (III), MMA and DMA through electric injection and micellar-to-solvent accumulation MSS in co-electroosmotic flow co-EOF. The HDMB coating fuses the quartz capillary to satisfy the condition of the same EOF direction between the anion and the capillary. The background solution is a borax buffer solution. The micelle and the target analyte are injected and stacked through a field enhanced sample under negative pressure; methanol is injected, wherein the scanned analyte is brought by the micelles to the MSS boundary. According to the invention, arsenic in a natural drug is detected by using a micelle-to-solvent accumulation method through coating capillary electrophoresis, rapid detection of arsenic form is realized, and the sensitivity of on-line enrichment of a capillary electrophoresis sample is improved.
Owner:HANGZHOU NORMAL UNIVERSITY
Stabilized vesicle-functionalized microparticles for chemical separations and rapid formation of polymer frits in silica capillaries using spatially-defined thermal polymerization
PendingUS20210088509A1Increasing non-covalent interactionImprove function utilizationMaterial analysisChromatographic separationPolymer science
Surface-modified silica microparticles that are functionalized with stabilized phospholipid vesicles are described herein. These stabilized vesicles can be functionalized with either transmembrane receptors or membrane associated receptors and used for affinity pull-down assays or other chromatographic separation modalities to provide affinity capture / concentration of low abundance ligands in complex mixtures with minimal sample preparation. Further described are methods and apparatus for forming polymer frits in a fused silica capillary. The capillary containing a monomer solution is placed between one or more heat sources connected to each other via a jig and operatively coupled to a temperature controller. The polymer frits are synthesized via thermal polymerization of the monomer solution using the heat sources, which allows for placement of the polymer frits at a spatially-defined location in the capillary.
Owner:THE ARIZONA BOARD OF REGENTS ON BEHALF OF THE UNIV OF ARIZONA
Device and method for removing nanoscale particles adsorbed on surface of silicon wafer
ActiveCN112275696ASmall particle sizeSolve the problem of surface liquid residueSemiconductor/solid-state device manufacturingCleaning using liquidsGraphite electrodeSurface cleaning
The invention belongs to the related technical field of semiconductor surface cleaning, and discloses a device and method for removing nanoscale particles adsorbed on the surface of a silicon wafer. The device comprises a vacuum assembly and a liquid drop emission and acceleration assembly connected to the vacuum assembly; the liquid drop emission and acceleration assembly comprises a liquid storage device, a graphite electrode, a PEEK capillary tube, a fused quartz capillary tube and a grounded extraction electrode; the liquid storage device is arranged above the vacuum assembly and is used for accommodating a conductive solution; the graphite electrode is arranged on the liquid storage device, and two ends of the graphite electrode are connected with a direct-current power supply and theconductive liquid; one end of the PEEK capillary tube is connected with the liquid storage device, the other end of the PEEK capillary tube is connected with the fused quartz capillary tube, and oneend of the fused quartz capillary tube extends into the vacuum assembly; and the extraction electrode is arranged in the vacuum assembly and is opposite to the emission tip formed by the fused quartzcapillary tube. According to the device and method, the cleaning efficiency is improved, the cost is reduced, and no liquid is left after removal.
Owner:HUAZHONG UNIV OF SCI & TECH
Manufacturing method of self-sensing micro-clamps with grippers of fiber optic fabry-perot interferometer
ActiveCN109231161BSimple structureSmall sizeMeasurement devicesOptical waveguide light guideFiber interferometerSilicon chip
It is an object of the present invention to provide a manufacturing method of a micro-gripper which takes an optical fiber Fabry-Perot interferometer as a clamping jaw and which has a self-sensing function, wherein that micro clamp manufactured by the manufacture method can solve the problem that the clamping jaws of the micro clamp in the prior art can not simultaneously realize the clamping component and the clamping force self-sensing. The method comprises the following steps of: fusing silica capillary tube with reflective optical fiber and input / output optical fiber respectively to form optical fiber Fabry-Perot interferometer; forming a clamping portion of the jaw on the reflective optical fiber; forming an oxide layer on the upper and lower surfaces of the silicon wafer; photoetching a groove pattern on an upper oxide layer of a silicon wafer and a pattern of a monolithic flexible mechanism on a lower oxide layer of the silicon wafer by a photoresist, and etching a part of the silicon wafer that is not covered by the photoresist on an upper surface and a part of the silicon wafer that is not covered by the photoresist on a lower surface to form a groove and a monolithic flexible mechanism; installing the optical fiber Fabry-Perot interferometer with groove and single flexible mechanism respectively, and connecting the input / output optical fiber, the F-P demodulator, an actuator, the F-P demodulator and the controller correspondingly.
Owner:CHONGQING UNIV
Preparation method of fullerene nano-coating gas chromatographic column
The invention relates to a preparation method of a fullerene nano-coating gas chromatographic column. The method comprises that (1) fused quartz capillary tubes are activated; (2) amination treatmentis performed; (3) fullerene p-benzoate is prepared, wherein fullerene and azidobenzoic acid are dissolved in methylbenzene under the reaction temperature of 100-220 DEG C for the reaction time of 5-15hours; and (4) fullerene is bonded to a capillary column, wherein an xylene solution containing fullerene p-benzoate with the mass percent of 3%-15% is introduced into the capillary tubes for a reaction for 1-4 hours under the reaction temperature of 150-220 DEG C, the capillary tubes are washed three times with methylbenzene, and then the fullerene nano-coating gas chromatographic column is obtained. According to the method, by adopting fullerene as a stationary phase, the chromatographic column has an electron-lacking polyenoid property and has a high pi-pi interaction with an aromatic compound, thereby having high selectivity; and by the adoption of fullerene and a spherical structure of fullerene, the chromatographic column has excellent spatial selectivity on samples.
Owner:李笃信 +1
Mass spectrometric nano-spray electrode, manufacturing method and application thereof
InactiveCN102324375BStable sprayingImprove stabilityMaterial analysis by electric/magnetic meansIon sources/gunsCarbon nanotubeReusability
Owner:SHANGHAI INST OF ORGANIC CHEM CHINESE ACAD OF SCI
Gas chromatography-mass spectrometry detection method for methylaniline compound
InactiveCN102692475BRealize quantitative detectionImprove accuracyComponent separationMethylanilineGas liquid chromatographic
Owner:SHENZHEN ACAD OF METROLOGY & QUALITY INSPECTION
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