16 results about "Sample stability" patented technology

The invention discloses a hot stamping film coating adhesive force testing device which comprises a testing table, a transverse sliding table module is arranged at one end of the upper portion of the testing table in the horizontal direction, and a height sliding table module is arranged at the position, close to one end of the transverse sliding table module, of the testing table in the vertical direction. The transverse sliding table module is slidably provided with a sample table for placing a sample, the height sliding table module is slidably provided with a sensor assembly for fixing a to-be-tested film layer on the sample, a chip processor is arranged in the test board, and the transverse sliding table module, the height sliding table module and the sensor assembly are electrically connected with the chip processor. By specially designing the sample table for fixing the hot stamping film sample, the stability of the sample is remarkably enhanced during testing, the measurement error is effectively reduced, flexible adjustment within the range of 90-180 degrees can be realized according to material characteristics and use requirements, the test condition is ensured to be consistent with the actual application environment, and the test efficiency is improved. And the accuracy and practicability of the test result are further improved.

The invention relates to the technical field of sample preparation, and discloses a sample preparation method for microscopic characterization of a sample profile. The method comprises the steps of sample pretreatment, specific position positioning, profile preparation, sample separation, carrier transfer and fixation and the like, cutting parameters are accurately controlled through a focused ion beam (FIB), and a silicon wafer carrier and Pt / C / W welding and fixing technology is combined. The problems that in an existing sample preparation method, sample preparation precision is low, conductivity is poor, fixation is unstable, and multi-characterization combination adaptability is insufficient are solved. Nondestructive preparation of a small-size micro-area profile at a specific position is realized, the sample stability is high, various characterization means such as nano infrared and nano SIMS are compatible, the accuracy and relevance of analysis data are ensured, and the method is suitable for microscopic characterization requirements in the fields of semiconductor integrated circuits, nano coatings, biomedical materials and the like.

The invention belongs to the technical field of ultra-deep and ultra-high pressure ground sample transfer, and relates to an ultra-deep and ultra-high pressure condensate gas well sampling and transferring device and a use method thereof. Comprising a sampler, the sampler is used for completing sampling from the ultra-deep ultrahigh pressure condensate gas well, and a sample transferring container is used for transferring a sample. The sample transfer container is filled with alcohol substances, and when a sample is transferred into the sample transfer container, the alcohol substances are synchronously discharged to the liquid collection container, so that the stability of the pressure in the sample transfer container is ensured, and the stability of the sample in the sample transfer process is ensured. A switch unit is arranged on the communicating pipeline and is used for controlling communication and disconnection between the sampler and the sample transfer container. And the first pressure measuring and regulating part is used for regulating the pressure in the sampler, so that stable sample transfer of the sample is facilitated. And the second pressure measuring and regulating part is used for regulating the pressure in the sample transferring container to ensure the stability of the sample transferring process. According to the invention, the sample transfer in the ultra-deep ultrahigh pressure condensate gas well sampler can be realized, and the sample transfer process is safe and reliable.

The invention provides a Raman characterization method based on targeted modification of SHINERS and co-pool synchronous monitoring of heterogeneous Fenton-like reaction, and belongs to the technical field of cross of spectral analysis and environmental catalysis. Aiming at the defects of poor sample preparation stability, large measurement system error and only qualitative data analysis in the prior art, through innovative fusion of a targeted stable sample preparation technology and a dual-electrode common-pool synchronous monitoring system, a time-resolved in-situ Raman spectrum and a targeted modified shell layer isolated nanoparticle enhanced Raman spectrum are combined for use; dynamic in-situ characterization of transient intermediates, active species and reaction paths on the surface of the catalyst in a heterogeneous Fenton-like reaction system is realized. The method can adapt to various catalysts and oxidants, qualitative characterization and process detection of heterogeneous reaction are achieved, breakthrough technical support is provided for analysis of a Fenton-like reaction mechanism, and the problems that a traditional sample preparation and measurement method is poor in universality and insufficient in uniqueness are solved.

The utility model provides a coal detection sample transportation device, relates to the technical field of coal detection, and solves the technical problems that a coal detection sample transfer trolley is single in function and cannot shake up samples in the transfer process. The coal detection sample transporting device comprises a vehicle body, a driving device located on the vehicle body, a rotating shaft, a rotating arm and a tank, the driving device is fixed to the vehicle body, the driving device is in driving connection with the rotating shaft and used for driving the rotating shaft to rotate with the axis of the rotating shaft as the axis, the rotating shaft is hinged to the rotating arm, and the rotating arm is rotationally connected with the side wall of the tank; a containing plate is fixed in the tank body and used for fixing a sample bottle, and the tank body can be driven by the rotating arm to swing so as to shake the sample bottle; the driving device drives the rotating shaft to rotate to realize rotation of the rotating arm, so that the tank body swings to automatically shake up the sample bottle, the problems of low manual shaking-up efficiency and poor sample uniformity are solved, and the device has the advantages of improving the detection efficiency and the sample stability.

The invention provides a method for measuring the content of active ingredients in gardenia-rhubarb decoction. The method comprises the following operation steps: 1) preparing a reference solution; (2) preparing a test solution; and (3) detecting by adopting an HPLC (High Performance Liquid According to the method for determining the content of the active ingredients in the gardenia-rhubarb decoction, the reference sample of the rhubarb decoction is obtained on the basis of the original record of Jingui Litu and is used for constructing the method for detecting the active ingredients in the gardenia-rhubarb decoction; according to the method, high-resolution detection of seven key functional components including genipin gentiobioside, geniposide, narirutin, hesperidin, daidzein, emoditin-7-O-beta-D-glucoside and genistein is realized, the specificity is high, the repeatability is good, a reliable technical support is provided for quality standard improvement and clinical precise medication of the gardenia-rhubarb decoction, and the method has a wide application prospect. The method has important significance on guaranteeing the stability of the gardenia-rhubarb decoction reference sample.

This invention relates to the field of internal quality control technology for nucleic acid testing, and discloses a method for preparing an internal quality control sample for viral nucleic acid testing for blood screening. The method includes: mixing HCV RNA-positive plasma; mixing the HCV RNA-positive plasma with HCV RNA-negative plasma or newborn calf serum to obtain a first plasma mixture; mixing the plasma mixture with methylene blue solution to obtain a second plasma mixture; and irradiating the second plasma mixture with light. The method for preparing an internal quality control sample for viral nucleic acid testing for blood screening provided by this invention yields a sample with good stability and low cost.

The utility model application relates to the field of biological experiment equipment discloses a kind of living cell tissue perfusion collection systems.The system includes: liquid flow switching dosing module, constant temperature incubation module, sample automatic collection module and sample low-temperature maintenance module.Liquid flow switching dosing module switches different liquid according to experimental requirement anytime, average shunt pumps into constant temperature incubation module;Constant temperature incubation module provides closed, constant temperature incubation liquid flow environment for living cell tissue perfusion experiment;Sample automatic collection module receives the perfusion liquid sample flowing through constant temperature incubation module, and according to the specified time sequence, sample is collected into collection well plate;Sample low-temperature maintenance module keeps sample collection plate in relatively low temperature state by refrigeration temperature control mode, to delay sample volatilization and the denaturation of the substance to be tested in it, guarantee sample stability.Through the system, perfusion liquid sample can be accurately collected according to time sequence, improve experimental result accuracy, to obtain repeatable high-quality experimental result.

The invention relates to the technical field of production of grid samples for electron microscopes, and discloses a grid sample production device for electron microscopes, which comprises a main body assembly and a frame body, a first air cylinder is fixed on the frame body, a tweezers adapter is fixed at the output end of the first air cylinder, and tweezers are arranged below the tweezers adapter. Grids are clamped by the tweezers, and the tweezers adapter is connected with the tweezers through a connecting piece. And the freezing assembly is arranged in the frame body and comprises a freezing piece. The device has the beneficial effects that the connecting piece cooperates with multiple springs through a limiting block and a swing rod, quick disassembly and assembly of tweezers and an adapter are achieved, the direction of the tweezers can be positioned, grid angle deviation is avoided, the operation efficiency and the sample stability are improved, a moving piece, a limiting piece and a screening piece in the freezing assembly are linked, an empty storage barrel is automatically searched, freezing grids are stored in a sealed mode, and the freezing efficiency is improved. A low-temperature environment is guaranteed and storage efficiency and sample quality are improved.

The application relates to a sample processing liquid for respiratory virus antigen detection and a preparation method thereof, which comprises a phosphate buffer, 0.05-0.5 g / L sodium caseinate, 1-20 g / L bovine serum albumin, 10-50 mL / L surfactant, 1-10 g / L guanidine hydrochloride, 3.72-37.2 g / L ethylenediaminetetraacetic acid disodium salt dihydrate solution, 1-5 mL / L CL preservative, 1-5 mL / L BND bacteriostatic agent and 900-988 mL / L sterile deionized water; and the application has the advantages of good sample stability.

The utility model relates to the technical field of food detection, and discloses a sample preservation device, which comprises a preservation box and a sample tube, the inner part of the preservation box is fixedly connected with a limiting column I, the outer wall of the limiting column I is connected with a limiting round block in a sliding manner, and the outer wall of the limiting round block is rotatably connected with a sample disc; a sample groove is formed in the top end of the sample disc, the outer wall of the sample tube is slidably connected to the inner wall of the sample groove, a through groove is formed in the outer wall of the storage box, and a fixing shell is fixedly connected to the outer wall of the storage box. According to the sample taking device, the sample disc, the sample tubes, the fixed column, the gear, the rack I, the connecting block, the rack II and the reset assembly are matched with one another, so that the sample tubes can be taken out one by one in a sample taking process, and all the sample tubes do not need to be exposed outside, so that the interference of environmental change on undetected samples can be reduced to the greatest extent; the stability of the sample can be maintained, and meanwhile, the orderly detection of the sample can be facilitated.

The application provides a capability verification liquid sample stability test method and related equipment, and relates to the technical field of radionuclide analysis.The method comprises the following steps: randomly drawing a preset number of to-be-processed liquid samples from a liquid sample, determining a stability test parameter, placing the to-be-processed liquid samples into corresponding test environments for processing, obtaining to-be-tested liquid samples, and the stability test parameter at least comprising a temperature.An analysis is performed according to a standard analysis method to obtain a measurement average value of a radionuclide, the measurement average value is corrected to a preset test date according to a half-life of the radionuclide to obtain a corrected average value, and a stability conclusion of the liquid sample under the stability test parameter is obtained according to the corrected average value.The method can test factors affecting the stability of the capability verification liquid sample, avoid the influence of these factors during the analysis of the activity concentration of the radionuclide, and improve the reliability of the analysis result of the activity concentration of the radionuclide.

This integrated drying and storage device for XRD analysis of liquid samples includes a drying chamber and a storage chamber. The storage chamber is connected to the outside of the drying chamber. One side of the drying chamber is connected to a first sealing surface via a rotating shaft, and the other side of the storage chamber is connected to a second sealing surface via a rotating shaft. The drying chamber contains a heating chamber with a resistance wire inside. Multiple symmetrically arranged first positioning protrusions are located inside the drying chamber. This integrated drying and storage design simplifies and improves the process, reduces the chance of samples coming into contact with humid air, significantly reduces the probability of sample deliquescence, ensures sample stability, enables rapid analysis, and improves work efficiency and the accuracy of analytical results. The multi-layer sample rack design allows each layer to move vertically, meeting diverse drying and storage needs.

The application provides a sample storage device and method for ecological environment monitoring, multi-stage characteristic identification is performed on the degradation rate of an ecological environment sample, a stage state characteristic of the ecological environment sample is obtained, a sample stability index under a current storage condition is determined according to the stage state characteristic and a performance degradation coefficient in each sealing data, a quality decay characteristic of the ecological environment sample is determined according to the stability index and the effective component content of the ecological environment sample, a balanced preservation condition for maintaining the sample effectiveness of the ecological environment sample is predicted based on the quality decay characteristic, the balanced preservation condition is compared with each external environment parameter collected by an intelligent sensor in multiple stages, an environment deviation value of each temperature and humidity control node is obtained, and the storage state of the ecological environment sample under visual monitoring is classified and determined based on each environment deviation value. Based on the above scheme, the environment classification regulation based on state prediction can be realized.

In some embodiments, the present disclosure provides an icIEF sample matrix that enables icIEF analysis of a pegylated protein in its actual conjugated state. Sample matrices of the present disclosure can include glycine that enables the isolation of co-migrated PEGylated protein charge variants. The sample matrix can also include taurine that further improves the icIEF assay by eliminating the matrix-caused baseline interference. Thus, the sample matrix of the present disclosure comprising a combination of glycine and taurine enables icIEF separation of acidic and basic species of PEGylated proteins from the main peak, allowing for identification / isolation, characterization and quantification of discrete PEGylated protein species. By characterizing PEGylated proteins via icIEF using a sample matrix of the present disclosure, repeatability, linearity, accuracy, sample stability, and method robustness are achieved.

The utility model relates to water sample enrichment technical field discloses a kind of enrichment sampling device of river water body pollutant, including socket, detection frame and multiple enrichment devices.Detection frame adopts cylindrical support design, is connected recessed groove and can be axially rotated on socket top, and its outer periphery is equipped with multiple groups of installation clamping position for installing enrichment device.Spring is equipped with locating bead on socket, and cooperate with stepped limiting recess in the connecting recess of detection frame, reliable limiting and rotating positioning are realized.Equipment is ensured to sink steadily, and detection frame top is equipped with exhaust hole with exhaust valve.Enrichment device adopts modular DGT device, and quick installation and fixation are realized by clamping position groove and plug.This device makes each enrichment device bear water flow impact evenly by rotatable detection frame design, eliminates sampling deviation;Spring bead locking mechanism guarantees sampling stability;Modular design is convenient to operate;Exhaust system ensures sampling accuracy;Multiple sampling unit design improves sampling efficiency.