17results about How to "Improve pretreatment efficiency" patented technology

The utility model provides a flexible row extraction column structure suitable for high-throughput operation and a separation device. The extraction column structure and a liquid storage pipe are sleeved for use; the extraction column structure is inserted into the liquid storage pipe and is pressed down for filtration, to-be-filtered liquid stored in the liquid storage pipe enters from an opening in the bottom of the filter pipe, sequentially penetrates through the sieve plate assembly (6) and the filter membrane assembly (3) and then enters an inner cavity of the pipe body, and extraction liquid is obtained after pressing down for filtration; through design optimization of the sieve plate assembly (6) and the filter membrane assembly (3), the extraction column structure can be used for liquid-liquid separation or solid-liquid separation, and when the extraction column structure is used, the extraction column structure is inserted into a liquid storage pipe and pressed down to obtain a separated product. The extraction column structure has important application value in realization of high throughput and automatic detection.

The invention discloses a speed reducer simulation pre-processing template, which comprises an identification module used for acquiring tiny features between a storage model and an import model, and searching, deleting and repairing the tiny features through a size search range; the modification module is used for clearing or modifying the tiny features; the storage module is used for storing the storage model, the material parameters, the connection relation, the boundary condition, the external load, the grid division, the lubrication mode and the clear record and the modification record of the tiny features; and the calling module is used for calling the storage model, the material parameters, the connection relationship, the boundary condition, the external load, the grid division, the lubrication mode and the clear record and the modification record of the tiny features. According to the method, all links of simulation pre-processing are comprehensively covered, meanwhile, the method is connected with a system cloud end, computer storage and external hardware, a user can conveniently select different storage modes, and the method has good flexibility and expansibility.

The invention relates to the technical field of resin detection, in particular to a method for detecting trace metal ions in PTFE (polytetrafluoroethylene) resin, which comprises the following steps: S1, dispersing cleaned PTFE resin in a mixed solution of an alcohol organic matter and acidic pure water, sealing, and extracting in a shaking table to obtain an intermediate solution; s2, centrifuging the intermediate solution obtained in the step S1, standing for layering, then taking out supernate, respectively putting the supernate and a blank sample into a nitrogen blowing concentrator, concentrating until the supernate and the blank sample are dried, adding acidic pure water, dissolving, and diluting to obtain a to-be-detected sample solution; s3, preparing a metal ion standard solution, establishing a standard curve, and determining the concentration of metal ions in the sample solution by using ICP-MS; by optimizing the extraction solvent of trace metal ions and cooperating with shaking table oscillation, the treatment efficiency of the sample before ICP-MS detection is remarkably improved, so that the detection efficiency of the PTFE resin is greatly improved.

The invention discloses a method for simultaneously and quickly pre-treating phthalic acid ester and metabolites thereof in a biological sample, which comprises the following steps: (1) adding diluted hydrochloric acid into the sample according to a ratio of 0.5 g: 3mL, and vortex for 1-3 minutes; (2) adding acetonitrile into the mixed solution obtained in the step (1) according to a ratio of the sample to acetonitrile of 0.5 g: 3mL, carrying out vortex treatment for 1-3min, and then carrying out ultrasonic treatment for 8-15min; (3) adding an extraction salt bag into the mixed solution obtained in the step (2) according to the mass ratio of the sample to the extraction salt bag being 1: 4, violently shaking to enable the salt bag to be fully and uniformly mixed, and then vortex for 5-8 minutes; and finally, centrifuging for 5-6 minutes at the speed of 3000rpm, and taking supernate, so as to obtain a solution for detecting the phthalate and the metabolites thereof.

This invention belongs to the technical field of bactericide residue analysis and determination in plant-derived foods, specifically relating to a method for detecting isobutylethoxyquinoline and its metabolites in plant-derived foods. The method includes extraction with acetonitrile under citrate conditions, followed by purification with C18 (25 mg), PAX (25 mg), and XFM64 (nitrogen-doped multi-walled carbon nanotubes, 10 mg) adsorbents. Chromatographic separation is performed using a C18 column with methanol-2 mmol / L ammonium acetate (containing 0.1% formic acid) as the mobile phase, isocratic elution at a flow rate of 0.40 mL / min, electrospray ionization (ESI+), and detection in multiple reaction monitoring (MRM) mode. This invention is simple to operate, has high pretreatment efficiency, and its precision and recovery rate meet the regulatory residue limit monitoring requirements. It is suitable for the simultaneous determination of isobutylethoxyquinoline and its metabolites in plant-derived foods.

The invention relates to an electronic-grade citric acid production process based on combination of extraction and ion exchange resin, which comprises the following steps: adding an extraction agent into an industrial-grade citric acid solution with higher impurity content for pretreatment, adsorbing part of metal impurities in the citric acid solution, and performing two-phase separation after the extraction is completed, an organic extraction phase obtained through separation is regenerated and reused; the citric acid purified liquid obtained through separation passes through a three-stage purification resin column, the residual extracting agent, main metal impurities, residual gold impurities and anions are sequentially removed, and finally the electronic-grade citric acid solution is obtained. The process is high in production efficiency, simple in equipment and suitable for industrial popularization.

This invention discloses a pesticide residue detection sample oscillation extraction device with solid-liquid separation function, relating to the field of detection equipment. When extracting pesticide residue samples using this device, the sample to be tested is placed in a combined testing cylinder, and a clamping and positioning component clamps the lower clamping plate. A motor drives a rotating plate, a placement cylinder, and the combined testing cylinder to rotate via a telescopic cylinder. Because the lower clamping plate is wavy and annular, the rotating plate vibrates up and down, and the combined testing cylinder vibrates along with the plate, ensuring that the substances in the sample are fully dissolved in the solvent within the combined testing cylinder. When solid-liquid separation is required, the clamping and positioning component is moved to another slot, clamping the upper clamping plate. Because the upper clamping plate is circular and annular, the rotating plate drives the combined testing cylinder to rotate at high speed, achieving solid-liquid separation through high-speed centrifugal force.

The invention relates to the field of agricultural product analysis and detection, and discloses a pretreatment method for determining the ecostoichiometric ratio of strawberry fruits, which comprises the following steps: picking strawberry fruits as a sample, cleaning the sample, and freezing in a refrigerator; slicing the frozen sample; putting the cut sample into a freeze-drying machine for freeze-drying; crushing the cold-dried sample, and sieving to obtain sample powder; and loading the sample powder into a sample bag for subsequent detection. The problem of how to improve the pretreatment efficiency of the sample on the premise of not causing irreversible damage to the sample is solved. According to the method, the strawberry fruits are freeze-dried by using the freeze dryer, so that dehydration is thorough, the pretreatment efficiency of the strawberry fruits is improved, irreversible damage to samples is avoided, and the method has the advantages of being simple to operate, thorough in dehydration, capable of improving the accuracy of analysis and determination results and the like.

This invention proposes an automatic search method and system for acoustic-vibration coupling surface patches based on structural mechanics analysis software, belonging to the field of computer-aided engineering technology. This application includes: providing a structural finite element model and an acoustic field finite element model of the structure to be analyzed; screening structural elements in the coupled surface element structural finite element model, and constructing a candidate set of structures based on the screened structural elements; constructing an OBB hierarchical bounding box tree based on the acoustic field of the coupled surface elements; constructing each OBB structural bounding box for each structural element in the candidate set of coupled surface elements; screening acoustic field elements to obtain candidate acoustic field elements; screening structural elements to obtain coupled surface elements, and organizing the coupled surface elements into coupled surface patches; and storing the numbers of the coupled surface patches as named groups. This application can automatically and accurately extract coupled surface elements from the finite element structural model, realizing fully automatic search and identification of acoustic-vibration coupling surface patches.

The utility model provides a digestive juice adding weighing and heating incubation device for an integrated sputum pretreatment device, which comprises a working platform, a weighing and heating device, a liquid adding device and a rotary mechanical arm device are assembled on the working platform, the automatic weighing and heating device comprises an electronic balance and a weighing cylinder arranged above the electronic balance, and the liquid adding device comprises a liquid adding device and a rotary mechanical arm device. A heating plate is installed at the bottom of the weighing cylinder, and a heat preservation layer surrounds and is attached to the outer wall of the weighing cylinder. The rotary mechanical arm device comprises a cap screwing machine and a sample adding needle, the top end of the sample adding needle is a liquid inlet end and is connected with the outlet end of the sample adding pump through a first hose, and the inlet end of the sample adding pump is connected into the digestive juice storage bottle through a second hose. The sputum digestive juice is added in a standardized mode by weighing the sputum, so that bacteria in the sputum are better homogenized, and the culture positive rate of real pathogenic bacteria is greatly improved.

The utility model relates to the technical field of automatic laboratories, and discloses a pretreatment system for measuring the salt content of crude oil, which comprises a rack and a working table, and a centrifugal tube array, a suction head array, a solvent container array, a metal bath unit, a vortex mixer, a centrifugal tube uncovering unit and a centrifugal machine are respectively arranged on the working table. The rack is provided with a movable operation unit, the movable operation unit comprises a liquid suction gun and a clamping jaw cap screwing mechanism, the centrifugal tube array, the suction head array and the solvent container array are located on one side of the working table, the centrifugal machine is located on the other side of the working table, and the metal bath unit, the vortex mixing instrument and the centrifugal tube uncovering unit are located in the middle of the working table. Through automatic system integration, automation of a series of operations such as liquid adding, heating, mixing and centrifuging is realized, the pretreatment efficiency is improved, and a guarantee is provided for the accuracy of subsequent salt content data.

The utility model discloses a kind of adsorption foamed plastic pretreatment device, belong to foamed plastic processing equipment technical field, a kind of adsorption foamed plastic pretreatment device, including base, the base top is fixedly connected with soaking pool and mounting bracket, and mounting bracket is located at the side of soaking pool, the top of the soaking pool is fixedly connected with support frame, the top of the support frame is fixedly connected with top plate, the top of the top plate is installed with multiple lifting cylinders, the output end of the lifting cylinder extends to soaking pool, it can effectively solve the problem of traditional foamed plastic pretreatment process manual operation labor intensity, processing efficiency is low, and semi-automatic equipment structure is complex, function is single, process is not smooth, resulting in the problem of low production efficiency and production cost increase, realize from foamed plastic raw material automatic soaking, draining to the integrated pretreatment process of transfer, reduce manual intervention, improve overall processing efficiency, meet the demand of large-scale production.

The invention discloses a static stiffness efficient simulation analysis method for a pre-compression type double-cushion mount, and relates to the technical field of static stiffness efficient simulation analysis, the static stiffness efficient simulation analysis method comprises the following steps: pretreatment: obtaining a solid mesh model of the double-cushion mount, omitting an approximate rigid body, and only retaining a rubber body; the relative relationship between the approximate rigid body and the rubber body is simplified and replaced by a simple unit to form a virtual relative relationship; loading and constraint setting: utilizing a virtual relative relation to compress from the middle of the two rubber bodies to the two ends respectively, and loading to calculate the rigidity after pre-compression is completed; and post-processing: drawing an axial static stiffness curve and / or a radial static stiffness curve according to the received reaction force and displacement. According to the method, a model participating in calculation is simplified, contact, binding and constraint are simplified, and a load loading mode is adjusted; through the simplification, the calculation power consumption is reduced, the pretreatment and calculation time consumption is reduced, and meanwhile it can be guaranteed that the calculation result is not changed.

The invention discloses the design and synthesis of haptens of ethofenprox, the development of artificial antigens and antibodies of ethofenprox, and the application thereof in the field of rapid detection and affinity purification column. An artificial antigen with immunogenicity is prepared by the steps of ethofenprox hapten design, linker introduction, carrier introduction, synthesis, purification, etc., and an amide carboxylic acid-modified ethofenprox hapten product is obtained. The ethofenprox hapten of the structure is coupled with keyhole limpet hemocyanin, bovine serum albumin or chicken ovalbumin to synthesize an immunogen and a coating agent. The artificial hapten has high immunoactivity and can stimulate the animal immune system to produce anti-ethofenprox antibodies, and the antibody titer of immune Blab / c mouse serum is 3200. The invention fills the gap that there is no suitable artificial antigen for ethofenprox for preparing specific and highly sensitive antibodies, and establishes a rapid and sensitive immunoassay analysis method for ethofenprox.

The present invention discloses a method for rapidly determining the amount of amprolium residue in animal food based on one-step solid phase extraction. The sample is extracted with 80% acetonitrile solution (containing 0.2% formic acid), the supernatant is purified by one-step PRiME HLB solid phase extraction column, separated by BEH HILIC column, gradient elution is performed with acetonitrile-acidified ammonium formate as mobile phase, detection is performed in triple quadrupole mass spectrometry electrospray ionization multiple reaction monitoring mode, and quantitative analysis is performed by matrix matching external standard method. In the range of 0.25-100 ng / mL, the linear correlation coefficient R 2 The detection limit was 2.0 μg / kg and the quantification limit was 5.0 μg / kg. The spike recovery was 86.1%~108.5% and the relative standard deviation was 2.2%~8.4%. This method is simple and rapid in pretreatment and is suitable for the analysis and determination of amprolium residues in animal foods such as chicken, beef, liver, kidney, eggs and milk.

The invention discloses a plant sample centrifugation-free pretreatment method for magnetic particle-assisted solid-liquid rapid separation, which comprises the following steps: adding magnetic particles into a plant sample extraction system, and fully combining the magnetic particles with insoluble solids under the action of vortex mixing and / or ultrasonic treatment to obtain a plant sample solid-liquid separation solution; then, solid-liquid rapid separation is achieved under the action of an external magnetic field, clear supernate is obtained, and the sample pretreatment process does not need to be completed through traditional centrifugal operation. The method does not depend on high-speed centrifugal equipment, is simple and convenient to operate and short in treatment time, and is particularly suitable for powdery or sticky plant samples. The obtained sample extracting solution can be directly used for gas chromatography-mass spectrometry or liquid chromatography-mass spectrometry analysis, and the analysis result has good consistency with that of a traditional centrifugal method. The method can effectively reduce the dependence on centrifugal equipment, simplify the sample pretreatment process and improve the pretreatment efficiency of complex plant samples, and is suitable for rapid detection and quality control of traditional Chinese medicines, spices, foods and other plant source samples.