74 results about "Sample contamination" patented technology

The invention relates to the technical field of intelligent testing equipment, in particular to coke property intelligent testing equipment which comprises a dust removal fan, two high-temperature furnaces, a feeding temporary storage station, a particle temporary storage table, a multi-axis robot and a rotary drum mounting frame. Through the multi-axis robot integrating the double clamping jaws, the integrated operation of tool transferring and particle grabbing is achieved, material transferring in the whole link from feeding, pretreatment to testing can be completed without manual contact with samples, sample pollution, particle damage and operation deviation caused by manual sorting, weighing and transferring are effectively avoided, and the working efficiency is improved. Meanwhile, the labor cost is greatly reduced, and the stability and repeatability of the testing process are improved; by means of an information interaction structure of the feeding tool and the read-write device, a unique identity label is established for each coke sample, full-life-cycle information of the samples from feeding, preprocessing to final test data can be recorded in an associated mode in the whole process, and the problems that omission is prone to occurring and tracing is difficult in traditional manual recording are solved.

The invention provides a nuclear magnetic resonance system and method for simulating high-temperature and high-pressure conditions. The nuclear magnetic resonance system for simulating the high-temperature and high-pressure conditions comprises a core rotor module, a temperature control and heat dissipation module, a signal enhancement and detection module and a high-pressure environment module, and the core rotor module is used for solving the problems that a traditional rotor is low in precision, short in service life and poor in adaptability. According to the nuclear magnetic resonance system and method for simulating the high-temperature and high-pressure conditions, the tolerance pressure of a sample cavity is improved, extreme high-pressure scenes such as deep sea and a mantle can be simulated, the sealing life is prolonged, the sample pollution rate is reduced, the detection accuracy is improved, the pressure monitoring delay is shortened, the pressure fluctuation is reduced, and the environmental stability is improved; the deviation of different batches of detection results is reduced to be within 2%, the system has an overpressure automatic pressure relief function, the safety of the system is improved, the system is adaptive to different types of highly corrosive samples, and the detection types are expanded.

The utility model discloses a tomato leaf sampling device which comprises a sampler and a pressing device for the sampler, the sampler is placed on the pressing device, the pressing device comprises a base, a connecting rod, a supporting rod and a pressing rod, the surface of the base is provided with a fixing groove matched with the bottom of the sampler, the bottom of the connecting rod is fixed on the base, and the pressing rod is fixed on the base. One end of the supporting rod is fixed to the top of the connecting rod, a through hole is formed in the supporting rod, a sliding clamping groove is formed in the pressing rod, and one end of the pressing rod is rotationally connected with the supporting rod. According to the utility model, the through hole and the fixing groove are arranged, so that the sampler can be conveniently fixed and limited, the pressing rod and the sliding clamping groove arranged in the pressing rod are arranged, so that a blade sample can be conveniently and quickly cut off by the gland of the sampler and falls into the sampler, the sampler is sealed, and one-time sampling is completed; the device is quick and convenient, avoids sample pollution, can accurately select a sampling position, realizes accurate operation, reduces labor intensity, improves working efficiency, and has very high practical value.

This invention discloses a sampling device and method for insulating oil in transformers of high-voltage substations, relating to the field of intelligent operation and maintenance and automated sampling technology for high-voltage power equipment. It includes: a sampling robot comprising a walking chassis, an oil sampling component, and an oil extraction sampling mechanism; a target sampling end mounted on the transformer's oil sample collection box; the oil extraction sampling mechanism being connected to the oil sampling component via a fluid pipeline; the oil sampling component comprising: an oil sampling robotic arm mounted on the walking chassis for driving an end effector to adjust its spatial position; and a sampling docking component located at the end of the oil sampling robotic arm, having an internal fluid transmission channel and being connected to the oil extraction sampling mechanism. It has advantages such as high sampling process safety, high automation, high docking efficiency, strong sealing protection, high standardization of sample collection, and effective reduction of manual operation risks and sample contamination probability.

The utility model discloses food detection vacuumizing sample storage equipment which comprises a storage tank, the storage tank is a cavity shell of a cylindrical structure, a buckle cover is integrally arranged at the top of the storage tank, a discharging port is formed in the bottom of the storage tank and is closed through a valve, a multipurpose connector is arranged on the buckle cover, and the multipurpose connector is connected with the storage tank. The multipurpose connector is connected with a conversion controller; the utility model relates to the technical field of food detection equipment, and in the food detection vacuumizing sample storage equipment, a dynamic airtight plugging technology is adopted to replace a traditional sealing ring, a high-pressure inert gas cylinder is used for driving and controlling an air bag to expand and seal, an electronic barometer and an electromagnetic valve are combined for real-time closed-loop pressure regulation, and compared with a conventional rubber sealing ring, the ageing resistance is improved; the sealing service life is longer, the three-way ball valve type switching controller is arranged to achieve switching of the vacuumizing mode and the feeding mode, the operation efficiency is improved, and compared with a scheme depending on static sealing, the sealing failure risk is reduced, and the sample pollution rate is reduced.

The present application belongs to the technical field of sample pollution evaluation, and discloses a sample cross-contamination evaluation method, device, equipment and medium, comprising: performing quality control on batch sequencing data, and performing mutation site detection and genetic marker typing according to a human reference genome sequence and a site interval file; according to the genetic marker typing result and the site interval file, the number of heterozygous genotype sites is counted and the sample heterozygosity is calculated, according to the sample heterozygosity and a preset threshold, the sample contamination state is determined; according to the copy number estimation of the sample, the allele frequency is diploid standardized correction; based on the allele frequency in the genetic marker typing result and the mutation site detection result, the cross-contamination relationship between each two samples is analyzed by using identification rules to determine the pollution source; the site for calculating the pollution proportion is selected, and the weighted average algorithm is used to calculate the pollution proportion. The sample pollution degree can be accurately estimated and the pollution source sample can be identified.

A sample contamination detection assembly may include an environmental sensor device configured to simultaneously measure two or more of the following in order to determine chemical contamination: humidity, temperature, or volatile organic matter content of one or more samples. The assembly may include a funnel device. The funnel device may include a plurality of side walls defining two or more internal cavities. At least one side wall may include an inlet opening connected to an inlet cavity and a first exhaust opening connected to an exhaust cavity, and the environmental sensor device may be positioned close to the inlet opening and the first exhaust opening. The funnel device may include a rim configured to direct the air from the handler away from the environmental sensor device. The funnel device may include a slit located in at least one side wall, the slit may be configured to direct air from one or more samples to the environmental sensor device.

This application provides a temporary storage device for liquid bagged samples. The storage box is box-shaped with an opening at the top. A slide rail is located at the top of the storage box. The sealing mechanism includes a male sealing rod and a female sealing rod slidably mounted on the slide rail. The male and female sealing rods can slide closer together to clamp the top opening of the liquid bag, or move away from each other to release the clamping force on the top opening of the liquid bag. A tightening mechanism is located between the corresponding male and female sealing rods. This application, through the cooperation of multiple sealing and locking mechanisms, utilizes the male and female sealing rods to clamp the top opening of the liquid bag, forming a uniform and tight clamping force at the bag opening. Because the sealing mechanism can slide along the slide rail, it can be flexibly adjusted according to the width of the liquid bag, ensuring that liquid bags of different sizes can be effectively sealed, avoiding gaps caused by incomplete sealing that allow contaminants to enter, greatly reducing the risk of sample contamination, and ensuring the accuracy of test results.

This utility model relates to the field of food testing equipment technology, and discloses a food testing box for walnut milk production with a scraping structure. The box includes a body, a liquid level window fixedly provided on the surface of the body, a liquid level gauge fixedly provided on one side of the liquid level window, a scraper slidably provided inside the body, a silicone ring engaging with the surface of the scraper, a buckle hinged to the top of the body, and a lid engaging with the top of the body. A retainer is fixedly provided on the surface of the lid to engage with the buckle. The box can store walnut milk samples, and the liquid level can be observed through the liquid level window and gauge. The lid can be engaged with the buckle and retainer, allowing the scraper to be positioned inside the box. The silicone ring seals the scraper within the box, facilitating easy transport of the box, preventing sample spillage, and preventing sample contamination. A support assembly provides support for the box.

Embodiments of the present application provide a sample pollution detection method, device, system and related equipment, the method comprises: obtaining nucleic acid information of a sample; calculating the mutation genotype frequency value BAF of the sample at a preset site; wherein the preset site is multiple, and in a non-polluted sample, the proportion of homozygous sites in the preset site is greater than the first proportion; determining the homozygous site in the preset site according to the BAF of the preset site; calculating the proportion of the homozygous site in the preset site, if the proportion of the homozygous site is less than the first proportion, the sample is a contaminated sample. Embodiments of the present application can simply and directly judge whether the sample is contaminated.

This utility model relates to the field of medical device technology, and in particular to a tissue sample container for pathology departments with a drainage function, solving the problem of the lack of convenient and effective drainage methods in the prior art. A tissue sample container for pathology departments with a drainage function includes a cup body and a cup lid threaded to the top of the cup body. A support base is fixedly connected to the bottom of the cup body, and a drainage assembly is arranged inside the support base. The drainage assembly includes a conical barrel, a guide tube, a drainage pipe, a movable rod, a lever, a helical spring, a baffle, and a sealing ring. The conical barrel is fixedly connected to the bottom of the cup body and located inside the support base, and the guide tube is fixedly connected to the bottom of the conical barrel. This utility model allows the baffle and sealing ring to move simultaneously with the movement of the movable rod, enabling liquid to drain from the drainage pipe, effectively improving the convenience and practicality of the drainage operation for staff, and preventing sample contamination during the drainage process.

The invention relates to an air reverse circulation rock sample conical divider and a method thereof. The divider comprises an upper rotational flow cylinder assembly, an upper gate assembly, a middle sample storage device assembly, a lower gate assembly and a lower division sampler assembly which are sequentially and hermetically connected from top to bottom. The upper rotational flow cylinder assembly achieves efficient gas-solid separation through a tangential inlet and an internal rotational flow structure. The lower division sampler assembly is provided with a rotatable conical cylinder and a proportion-adjustable division disc, so that uniform dispersion and accurate proportion division can be realized. Opening and closing of the upper gate and the lower gate are sequentially controlled in the drilling process, continuous and automatic collection and division of rock debris are achieved, the problems that in a traditional method, samples are polluted, sample division is uneven, and efficiency is low are effectively solved, and the device is particularly suitable for on-site rapid sampling operation of field geological exploration.

The invention provides methods of sample identification using germline structural variants to assess sample contamination and sample swap.

The utility model provides environment monitoring sample storage equipment which comprises a storage box, placing frame plates are arranged at the upper end of the interior of the storage box, a sliding sealing plate is slidably arranged in a sliding groove formed in the upper end of the storage box, a handle is arranged at the upper end of the sliding sealing plate, and a plurality of sliding placing frame plates are slidably arranged at the lower end of the interior of the storage box. A limiting locking mechanism used for limiting the sliding sealing plate is arranged on the front side face of the storage box, and a movement driving mechanism used for driving the sliding containing frame plate to move is arranged in the storage box. According to the sample storage equipment for environmental monitoring, the placement plate at the lower end can be moved out of the two sides of the storage box, so that a worker can quickly take samples at the upper end and the lower end for detection when detecting the samples, the sampling time is greatly shortened, the working efficiency is improved, and the risk of sample pollution is reduced.

The invention discloses an integrated multi-granularity sample separation device and a use method, the device comprises an integrated frame cabinet body, a feed inlet, a feeder, a divider, a crushing device, a storage device and other components are integrally arranged in the integrated frame cabinet body from top to bottom according to a material treatment flow, and after coarse impurities are preliminarily removed through the first divider, the first divider is separated from the storage device through the second divider; materials are divided by the second division machine, one part of the materials directly enter the coarse material storage device to be collected, the other part of the materials are refined by the crushing device and then fed into the fine material storage device to be collected, and a unified electric control system is arranged in the device to coordinate and control the sequential operation of all the components. According to the invention, dispersed sample preparation and sample separation processes are integrated in a set of closed system, so that full-process automatic and continuous preparation from original materials to coarse and fine two-stage sample separation samples is realized, sample pollution and loss caused by manual transfer are effectively avoided, and the analysis efficiency and the accuracy and representativeness of results are remarkably improved.

The invention belongs to the technical field of laboratory glass instruments, discloses a bottom reloading glass drying vessel with a flexible filter screen bag, and aims to solve the technical problems that a cover needs to be opened during reloading of a traditional drying vessel, sample pollution is easily caused, and operation is tedious. The device comprises a drying vessel body, a bottom sealing cover capable of being opened and closed and a detachable flexible filter screen bag, sample replacement is completed without opening the cover through a bottom material changing structure, the flexible filter screen bag can filter, separate and quickly take out the sample, and the device has the advantages of being pollution-proof, easy to clean and convenient and fast to operate. The device is suitable for laboratory sample drying, filtering, material changing and other operations, the experiment efficiency can be effectively improved, and the sample pollution risk is reduced.

The utility model discloses a geological exploration solid sample storage box, and relates to the technical field of transportation and storage of solid samples adopted in geological exploration, research and the like. Which comprises a bottom plate and a box plate mounted on the periphery of the top end of the bottom plate, a top plate is mounted at the top end of the box plate, and a handle is mounted on the top plate, and is characterized by comprising a sliding assembly arranged at the bottom end of the top plate and used for dismounting and mounting the top plate, a dismounting assembly arranged at the top end of the bottom plate and used for mounting and dismounting the box plate, and a placing assembly, the placing assembly is arranged in the center of the top end of the bottom plate and used for placing solid samples for geological exploration. According to the geological exploration solid sample storage box, the geological exploration solid sample storage box can be conveniently cleaned through the arrangement of the detachable storage box, due to the fact that geological exploration samples possibly contain dust and impurities, the interior of the geological exploration solid sample storage box can be conveniently cleaned and maintained through the detachable storage box, the storage environment is kept clean and tidy, and sample pollution is avoided.

The utility model relates to the field of field bird sample collection technology, specifically disclose a kind of sample collection device for field bird pathogen detection, including collection platform, the bottom of collection platform is equipped with support seat, rotating mechanism is equipped on support seat, the bottom of collection platform is connected with rotating mechanism, the bottom of support seat is equipped with support rod, the middle of collection platform top is equipped with feeding trough, the upper end of support seat one side is equipped with support plate, the side of collection platform is equipped with mounting rod, the bottom of mounting rod is connected with support plate, sampling mechanism is equipped on collection platform, the side of mounting rod close to collection platform is equipped with sampling scraper.

The utility model discloses an environmental monitoring sample storage device capable of avoiding sample pollution, and relates to the technical field of sample sealing storage. The first motors are fixedly arranged on the right side wall of the box body in a front-back symmetry mode, and the output ends of the first motors penetrate through the right side wall of the box body and then are fixedly provided with screws. The threaded pipes are rotationally arranged on the screw rods through threads respectively; the placing tables are fixedly arranged at the left ends of the threaded pipes respectively; the right ends of the telescopic rods are fixedly arranged on the right inner side wall of the box body, and the left ends of the telescopic rods are fixedly arranged on the right side wall of the placement table; samples can be conveniently and independently stored and taken, other samples are prevented from being polluted, and the detection accuracy is improved.

The utility model relates to the field of container structures, in particular to a sample storage device for food and drug detection. The storage device comprises a leaked liquid collecting box, a nylon net, a metal net side frame and a bottom plate, and a plurality of leaked liquid through holes are formed in the bottom plate. The liquid leakage through holes in the metal net side frame and the bottom plate can effectively ventilate, and deterioration caused by moisture is avoided; due to the arrangement of the liquid leakage through hole, sample pollution caused by liquid accumulation is avoided; the partition plates meet the split charging requirements of samples of different sizes, and the space utilization rate is increased; nylon nets on the surfaces of the partition plates effectively reduce sample collision damage; the leaked liquid collecting box and the bottom plate are quickly assembled / disassembled through a buckle-bayonet structure, the cleaning and maintenance process is simplified, and meanwhile, the leaked liquid collecting box prevents liquid from overflowing.

The invention discloses an underground water fixed-depth sampling device, which belongs to the technical field of sampling, and comprises an outer cylinder, a counterweight is slidably arranged in the outer cylinder, a sampling cylinder is arranged at the lower end of the counterweight, and the sampling cylinder adopts a telescopic pipe structure; a sampling barrel is arranged at the lower end of the sampling barrel; a filter head is arranged at the bottom of the sampling barrel; a sampling cavity is formed between the upper part of the counterweight and the outer cylinder; a water sample outlet pipe is arranged in the center of the upper end of the outer cylinder, and the top of the counter weight penetrates out of the water sample outlet pipe through a rope and then is connected with a lifting assembly; sealing mechanisms are arranged at the upper and lower ends of the outer cylinder. The underground water fixed-depth sampling device adapts to complex well conditions through sealing mechanisms at the upper end and the lower end of the outer barrel to prevent sample pollution, a filter head anti-blocking stabilizing device at the lower end of the sampling barrel, a counterweight and the outer barrel are in sliding fit, cleaning is easy, cross contamination is reduced, the representativeness and accuracy of underground water samples are finally guaranteed, and reliable data support is provided for related work.

The utility model discloses an auxiliary device for constant-temperature fluorescent quantitative reagent detection, and relates to the technical field of detection devices. A shell is fixedly connected to the top face of the bottom plate, a toothed plate is fixedly connected to the upper portion of the inner side wall of the shell, a movable frame is arranged below the toothed plate, a transverse shaft is arranged above the toothed plate, a gear and a worm wheel are fixedly arranged on the side wall of the transverse shaft in a sleeved mode, the gear corresponds to and is meshed with the toothed plate, and a motor is arranged on one side of the movable frame. The output shaft end of the motor is fixedly connected with a worm, the worm is meshed with the worm gear, an electric push rod is arranged in the middle of the bottom surface of the movable frame, a convex plate is fixedly connected to the inner bottom wall of the shell, a placement frame is detachably arranged above the convex plate, a placement groove is formed in the top surface of the placement frame in a penetrating mode, and a detection pipe can be taken and placed in the placement groove. The device is high in detection efficiency, is not in contact with the detection tube, avoids pollution to a sample, and ensures the cleanliness.

The embodiment of the invention relates to a method, a device, equipment, a medium and a product for detecting sample pollution. The method includes determining a first read count for a Y chromosome probe in a first body fluid sample. The method further includes determining a desired second read count of the Y-chromosome probe in a second bodily fluid sample. The method further includes determining a contamination level for the first bodily fluid sample based on the first read count and the second read count. Through the method, high-sensitivity pollution detection of trace male-derived DNA in the first body fluid sample can be realized under the condition of not increasing additional sequencing cost and experimental process.

This utility model relates to a telescopic disposable fecal sampling tube, comprising a container body, a sampling tube, and a sealing cap. The sampling tube has a telescopic structure, which includes a first sleeve, a second sleeve, and a third sampling rod that are slidably inserted in sequence, forming a telescopic sampling tube structure with adjustable length. The top end of the first sleeve is fixedly connected to the sealing cap, and the front end of the third sampling rod is provided with a sampling head. The sealing cap is screwed to the upper opening of the container body. This utility model's sampling tube achieves automatic extension and retraction of the sampling head through a telescopic mechanism, eliminating the manual alignment step and reducing the probability of misoperation, thereby reducing the probability of contact with fecal samples. It is particularly suitable for collecting fecal samples from toilets. The sealing cap prevents sample contamination during transmission and avoids environmental pollution. The groove design of the sampling head increases the number of samples obtained per unit area, improving work efficiency.

The application provides a biomolecule extraction device and method, the biomolecule extraction device comprises: a container provided with a plurality of accommodation holes; magnetic beads placed in the accommodation holes; a primary magnetic field device comprising a primary magnet arranged outside the container; a secondary magnet placed in the accommodation holes, the secondary magnet can be magnetized and demagnetized by the primary magnet; wherein the secondary magnet can attract the magnetic beads when magnetized by the primary magnet, and the movement of the primary magnet can drive the secondary magnet with the attracted magnetic beads to move into another accommodation hole, and the magnetic beads are dispersed in the solution in the accommodation hole after the primary magnet demagnetizes the secondary magnet; the secondary magnet is a cylindrical magnet, the direction of the magnetic pole of the primary magnet is parallel to the wall surface contacted during the movement, and the secondary magnet rolls along the wall surface with the magnetic beads during the movement of the primary magnet with the secondary magnet. The scheme provided by the application can solve the problems of additional consumables and easy sample contamination in the biomolecule extraction method in the prior art.

This invention provides a sampling device for municipal landscaping soil testing, comprising a sampling rod, an outer sleeve, and multiple telescopic sampling mechanisms spaced apart along the axial direction. The outer sleeve is slidably fitted over the sampling rod, and the extension or retraction of the sampling spoon in the telescopic sampling mechanism is controlled by sliding the outer sleeve. During sampling, the outer sleeve moves downward to retract the sampling spoon into the groove. After inserting the device into the soil to the target depth, the outer sleeve is lifted to extend the sampling spoon, which then rotates with the sampling rod to excavate soil, achieving simultaneous collection of soil samples at different depths. This device is compact in structure, easy to operate, and can complete multi-layer soil sampling in one operation, avoiding soil disturbance and sample contamination caused by repeated insertion and removal, thus improving sampling efficiency and accuracy. It is particularly suitable for rapid sampling of vertical soil profiles in municipal landscaping, environmental monitoring, and soil science research.

The invention discloses a co-deposition layer preparation and hydrogen isotope permeation in-situ testing device and method, and relates to the technical field of nuclear fusion equipment detection, and the device comprises a vacuum coating chamber which is internally provided with a transition chamber and a target position group; the target position group comprises a plurality of sputtering target positions, and the plurality of sputtering target positions are distributed in the circumferential direction of the same side of the sample; the gas cylinder group gas source is used for conveying at least one hydrogen isotope gas into the vacuum coating chamber; the first vacuum pump is communicated with the interior of the transition chamber through a pipeline, and the middle part of the pipeline is also connected with a quadrupole mass spectrometer. By installing different material targets, the deposition conditions of various typical impurities near the first wall of the Tokamak can be flexibly combined and simulated, a multi-element co-deposition layer closer to an actual service environment is formed, and an in-situ penetration test is immediately carried out after deposition, so that sample pollution and environmental deviation are effectively avoided, and the test efficiency is improved. And more accurate and reliable hydrogen isotope transportation data can be obtained.

1. The name of the design product: tray cleaning robot. 2. The use of the design product: the tray cleaning robot is an integrated machine for cleaning, blowing and drying the dried mineral powder sample tray, which can quickly clean the tray and avoid sample contamination. 3. The design points of the design product: the combination of shape and color. 4. The picture or photo that best indicates the design points: perspective view. 5. The design for which protection is sought contains color.

The present disclosure relates to a method, device, electronic device and program product for detecting sample contamination. The method comprises filtering a detection sample sequence based on a determined filtering threshold, wherein the detection sample sequence comprises single nucleotide polymorphism (SNP) site sequencing data of the detection sample. The method further comprises determining a feature value of the detection sample sequence based on the filtered detection sample sequence. The method further comprises calculating a likelihood of the detection sample being contaminated based on the feature value of the detection sample sequence and a trained machine learning model. The method further comprises determining that the detection sample is contaminated in response to the likelihood of the detection sample being contaminated being greater than a predetermined contamination threshold. Through the method, it can be determined whether the sample is contaminated, and the detection cost is reduced and the detection accuracy is improved.

The invention relates to the technical field of hemodialysis sampling, and discloses a nephropathy internal medicine hemodialysis sampler which comprises a sampling barrel, a mounting assembly and a clamping assembly are arranged in the sampling barrel, and a moving assembly is arranged at the top end of the sampling barrel; the installation assembly comprises two sets of sawtooth grooves symmetrically formed in the one-third position of the front end in the sampling barrel, clamping bases are embedded in the sawtooth grooves in a sliding mode, and a needle tube is installed on the sampling barrel through the clamping bases. From needle tube insertion, lower needle positioning to sample extraction, the problems of shaking, deviation and slipping easily occurring in traditional handheld operation are solved, the risk of puncture failure, sample pollution or repeated puncture caused by unstable operation is greatly reduced, the technical threshold of an operator is lowered, the sampling success rate and the patient comfort are improved, and the operation efficiency is improved. Meanwhile, the device is high in overall structure integration level, does not need to be provided with redundant parts for sampling each time, has good universality and controllable cost, and is suitable for clinical daily mass dialysis sampling.