156 results about "Sample contamination" patented technology

The invention relates to a centrifugal micro-fluidic chip for automatic detection of a nano-enzyme test strip and application of the centrifugal micro-fluidic chip. The centrifugal micro-fluidic chip integrates the steps of sample adding, chromatography, color development and the like of the nano-enzyme test strip, and full automation of nano-enzyme experiments on the micro-fluidic chip is realized. Comprising a reaction structure main body, a bottom runner layer, a vertical through hole layer, a pressing layer, a top runner layer and a sealing body. The closed structure of the chip effectively reduces the interference of external environmental factors on the experiment, reduces the risk of sample pollution, and ensures the high reliability of the detection result.

The invention discloses a sample pretreatment device for food processing detection, and relates to the technical field of food detection, the sample pretreatment device comprises a support frame, an annular guide rail, a placement detection hopper box and a detection treatment box body, under the cooperation of a first treatment assembly, a second treatment assembly and a third treatment assembly, each module undertakes different treatment functions, and the detection efficiency is improved. Due to the overall modular arrangement, the device has higher flexibility and expandability, each module can be independently adjusted or replaced according to different detection requirements, manual intervention is reduced, and the sample pretreatment time is greatly shortened, so that the overall detection efficiency is improved, and the requirements of large-scale food processing detection can be met; meanwhile, the risk that the samples are polluted is reduced, the samples can be finely processed according to respective functions, the consistency of the treatment effect is ensured, the manual cleaning workload is reduced, and the risk of cross contamination of the samples is reduced.

The utility model discloses a sampling device for medical examination, which comprises a sampler, a placing base for placing the sampler and a sampling rubber tube arranged at one end of the sampler, the inner wall of the sampler is in sliding connection with a piston, the top of the piston is fixedly connected with a pressing rod penetrating through the top of the sampler, and the top of the pressing rod is provided with a pressing plate. The outer side of the pressing rod is sleeved with a spring, one end of the spring is fixedly connected with the top of the piston, the other end of the spring is fixedly connected with the top of the sampler, the bottom of the sampler is in threaded connection with a connecting sleeve, a connector is arranged at one end of the connecting sleeve, a convex ring is integrally formed on the outer surface of one end of the connector, and a sampling rubber pipe is clamped to one end of the connecting sleeve. According to the utility model, the sampling rubber tube can be stably connected, no leakage in a sample transmission process is ensured, the risk of sample pollution is greatly reduced, cleaning and disinfection are not needed after single sampling, the time and labor cost of a disinfection link are reduced, and the inspection efficiency is improved.

The invention discloses a urine collection and storage device, and relates to the technical field of urine collection devices, the urine collection and storage device comprises a base frame for receiving urine and a liquid guide channel fixedly arranged on the base frame, the base frame is provided with a floating collection mechanism for quantitatively collecting urine at the middle end, and the floating collection mechanism comprises a horizontal base fixedly connected to the inner wall of the base frame; the horizontal base is provided with a horizontal assembly for adjusting the relative position of the transverse base and the liquid guide channel, the two horizontal sides of the middle clamping base are provided with a main inner cavity column and a slave inner cavity column respectively, and the partition frame is provided with a blocking assembly for partitioning and sealing the internal space of the main inner cavity column and the slave inner cavity column. By arranging the floating collection mechanism, midstream urine of a patient can be accurately collected, and meanwhile, tissues and impurities deposited at the bottom of a urine bag are abandoned, so that the purity and representativeness of a urine sample are effectively improved, the accuracy of a detection result is ensured, and the misdiagnosis risk caused by sample pollution or impurity mixing is reduced.

The invention discloses a powder sample preparation mold of a photoelectron spectrometer. The powder sample preparation mold comprises a sample groove and a base, the sample groove is made of a compressible material, has compressibility and is used for synchronously compressing and compacting the sample groove together with a sample; the base is a perforated plate with a plurality of holes, the holes are matched with the sample grooves in an embedded mode, the sample grooves are higher than the holes before compression, and the sample grooves are flush with the holes after compression. The sample preparation mold can be used for pressing powder samples in batches, the powder sample preparation process of the photoelectron spectrometer is simplified, the sample preparation time is shortened, the convenience of powder sample preparation can be effectively improved, sample pollution is avoided, and the sample preparation efficiency is greatly improved. Compared with a traditional mode of preparing a sample by using an adhesive tape, the sample preparation mold disclosed by the invention can be used for preventing glue on the adhesive tape from immersing into a powder sample to cause pollution, the sample can be recycled after a test is completed, the prepared sample does not need to be cut, powder cannot be generated to pollute a sample chamber, the exposed surface of the sample is relatively large and relatively flat, and the detection signal intensity is favorably improved.

The utility model discloses an automatic sample diluting device which comprises a sampling mechanism and a cleaning mechanism, the cleaning mechanism comprises a cleaning sleeve, and the side part of the cleaning sleeve is communicated with a cleaning introduction pipe and a cleaning discharge pipe; a sampling arm of the sampling mechanism is driven by a ball screw nut pair driven by a stepping motor I to ascend and descend along a left linear guide pair and a right linear guide pair, the overhanging end of the sampling arm is provided with a double-cavity needle tube sampling needle which downwards penetrates through a cleaning sleeve and is aligned to a sampling test tube, and at the top of the sampling needle, one cavity tube is connected with the sampling tube, and the other cavity tube is connected with a sampling test tube; at the descending limiting position of the sampling arm, the sampling needle extends into the sampling test tube and the needle tip at the lower end of the sampling needle does not touch the bottom of the sampling test tube, and at the ascending limiting position of the sampling arm, the sampling needle retreats from the sampling test tube and the needle tip of the sampling needle is located in the cleaning sleeve. According to the utility model, the instrument detection efficiency is improved, sampling consumables are saved, and the defect of sample pollution caused by difficulty in complete manual cleaning is overcome.

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 utility model relates to a sealing cover plate for PCR reaction and a PCR analyser, the PCR analyser comprises a full skirt plate, the sealing cover plate and a moving assembly, the sealing cover plate covers the full skirt plate, separation pins are arranged on the inner walls of the two opposite sides of the moving assembly in the first direction, the sealing cover plate comprises a plate body and a first side plate, and the first side plate is arranged on the plate body. The side, away from the plate body, of the first side plate is provided with a first boss, and in the second direction perpendicular to the first direction, the size of the first boss in the thickness direction of the plate body is gradually increased and then gradually decreased, so that when the moving assembly moves in the second direction to execute the cover opening action, the separating pin can move along with the moving plate and abut against the first boss, and the separating pin is separated from the moving plate. Therefore, the sealing cover plate can be jacked; meanwhile, the separation pin can abut against the step surface of the full skirt plate, so that the sealing cover plate and the full skirt plate can be separated from each other, secondary liquid adding can be facilitated, and the full skirt plate can be prevented from being damaged or sample pollution caused by splashing of a test sample in the full skirt plate can be avoided.

The utility model relates to the technical field of pipettors, and discloses a portable semi-automatic pipettor which comprises a pipettor body, one side of the pipettor body is provided with an open slot, the interior of the open slot is rotatably connected with a connecting column, the outer side of the connecting column is fixedly connected with a supporting plate, and the outer side of the supporting plate is fixedly connected with the pipettor body. A first gear is fixedly connected to the outer side of the connecting column, a second gear is connected to one side of the first gear in a meshed mode, the second gear is rotationally connected with the inner wall of the open groove, and an extension mechanism is arranged at one end of the supporting plate. The problems that a semi-automatic pipettor can be hung through the pipettor support, the liquid suction position cannot make contact with a table top, if the pipettor support does not exist in actual use, the pipettor makes contact with the table top easily, so that sample pollution is caused when a sample is sucked, and the pipettor needs to be carried together with the support when carried are solved.

The utility model discloses an electron microscope detection sample storing and taking device which comprises a storing and taking platform, the storing and taking platform comprises a platform body, a detection groove and a sample channel, and the sample channel is formed in the middle of the upper surface of the platform body. By arranging the conveying structure and the positioning structure, when a sample to be detected is detected, the sample is placed on the right side of the conveying belt in the sample channel, then the rotating handle is manually rotated anticlockwise, and the conveying roller is rotated by rotating the handle, so that the sample on the upper surface is conveyed in the sample channel through the conveying belt; after the sample is conveyed to the position of the detection groove, the sample is subjected to electron microscope detection, and then the rotating handle is continuously rotated anticlockwise, so that the conveying belt continuously conveys the sample until the sample is taken out through the leftmost side of the sample channel, continuous one-way flowing of the sample in the electron microscope detection process is realized, and sample pollution is effectively avoided; and the detection efficiency and precision are improved.

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.

The invention discloses a desktop type test tube plug automatic cover turning device which comprises a machine frame, a bracket, a clamping device and a rotary cover turning device are sequentially installed on the machine frame from bottom to top, the clamping device comprises clamping fingers, a clamping air cylinder for controlling the clamping fingers to move oppositely or oppositely is installed in the machine frame, and the rotary cover turning device is installed on the bracket. And the rotary cover turning device comprises a cover turning arm and a rotary oscillating cylinder for controlling the cover turning arm to rotate. According to the invention, the cylinder is used for driving and controlling to clamp and flip the test tube, compared with a traditional mechanical structure or a complex electric adjusting device, the driving is reliable, the parameter adjustment is convenient, and the flip efficiency is improved. The bracket fixes the test tubes, the height of the bracket is adjustable, and opening of test tube covers of different specifications can be achieved. The whole structure is simple, the automation degree of test tube uncovering can be improved, manual operation is reduced, operators are prevented from making contact with reagents, the sample pollution risk is reduced, and the test tube uncovering device is suitable for biological and chemical laboratory scenes and the like.

The utility model belongs to the field of experimental analysis equipment, particularly relates to a solid sample liquefaction quantitative separation device, and aims to solve the problems of sample characteristic change, low treatment efficiency, high sample pollution risk, insufficient quantitative sample separation accuracy and complex operation flow caused by temperature sensitivity. The device comprises a liquefaction module used for storing a solid sample and carrying out liquefaction treatment, an outlet of the liquefaction module is connected with an inlet of a quantification module, the quantification module is used for carrying out quantitative sampling on the liquefied solid sample, an outlet of the quantification module is connected with an inlet of a sample separation module, and the sample separation module is used for carrying out sample separation on the quantitatively sampled liquid; the control module is respectively connected with and controls the liquefaction module, the quantification module and the sample separation module. According to the utility model, the problem of sample characteristic change caused by temperature sensitivity is effectively solved, the treatment efficiency is improved, the sample pollution risk is reduced, the accuracy of quantitative sample separation is improved, and the operation process is simplified.

The utility model provides a leach liquor preparation device, which relates to the technical field of leach liquor preparation and comprises a shell, a fresh air system, a storage device, a sample adding device, a liquor adding device, a vibration device and a shifting device. The fresh air system is used for keeping air cleanliness in the device; the storage device is used for manually placing and storing the extraction pipe and enabling the extraction pipe to enter the extraction liquid preparation device; the sample adding device is used for adding an implanted sample into the extraction pipe; the liquid adding device is used for adding an extraction medium into the extraction pipe; the vibration device is used for vibrating and shaking the extraction pipe; the displacement device is used for completing displacement of the extraction pipe among the storage device, the sample adding device, the liquid adding device and the vibration device. According to the device disclosed by the utility model, by integrating automatic components, the automation of the preparation process of the leaching solution is realized, the operation accuracy and efficiency are remarkably improved, the labor cost is reduced, the high cleanliness in the device is ensured, and the risk of sample pollution is reduced.

The present invention discloses a sample analyzer, which includes a housing, a separation module, a detection module and a transfer module. The housing is provided with an installation cavity and an injection port connected to the installation cavity. The housing is also provided with an injection platform corresponding to the injection port. The injection platform is used to place the sample to be tested. The separation module is arranged in the installation cavity. The separation module is provided with a separation cavity. The separation cavity is used to accommodate the sample to be tested. The separation module is used to separate the sample to be tested. The detection module is arranged in the installation cavity and is located on the side of the separation module away from the injection port. The detection module is used to detect the sample to be tested. The transfer module is arranged in the installation cavity. The transfer module is used to transfer the sample to be tested on the injection platform to the separation cavity or the detection module. The present invention aims to provide a sample analyzer that integrates centrifugal separation and detection. The sample analyzer not only simplifies the manual operation steps, but also effectively reduces the biosafety risk of sample contamination, while shortening the detection time.

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.

The utility model provides an offshore area sediment columnar sample collecting device which comprises a sampling pipe which is connected with an extension rod through a connecting assembly. A through hole is formed in the top end of the sampling pipe in a penetrating manner, the top end of the sampling pipe is connected with an end cover, a plurality of overflow holes are formed in the side wall of the upper part of the end cover in a penetrating manner, a gravity ball is arranged on the sampling pipe above the through hole, and the gravity ball is connected with the inner top wall of the sampling pipe through an elastic piece; an opening in the lower end of the sampling tube is detachably connected with a bottom cover, a plurality of fan-shaped plates are hinged to the opening of the bottom cover, springs are connected between the upper surfaces of the fan-shaped plates and the inner side wall of the bottom cover, and a sediment sealing structure is formed when the fan-shaped plates are closed; and when the plurality of sector plates are opened, a channel convenient for sediment to pass through is formed in the middle. The device is simple in structure and convenient to operate, meanwhile, the sealing performance of a sample is improved, and the sample is prevented from being influenced by external pollution.

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.

The utility model discloses an electrothermal blowing drying box capable of avoiding sample pollution, which comprises a drying box main body, a support component arranged in the drying box main body, a fixing component arranged on the support component, a filter component arranged on the drying box main body, a control module and a temperature sensor. Samples are placed on the perforated plates, the perforated plates are arranged in two layers, hot air can be conveniently intercepted, the samples are kept being heated by the hot air, the perforated plates can be conveniently assembled through the sliding rails according to needs, more samples can be contained, or the perforated plates can be adjusted according to the sizes of the samples, and blown hot air can be filtered through the filter assembly. Meanwhile, the first filter part can be drawn out and is convenient to replace, air can be filtered through an activated carbon layer, the sample is prevented from being polluted by external air, and large-particle dust is blocked through ventilation holes of a filter plate.

The invention relates to a continuous temperature control transmission electron microscope sample rod without a heating coil. The continuous temperature control transmission electron microscope sample rod comprises a rear-end low-temperature Dewar with an inner-outer double-layer structure; the inner end of the sample rod outer rod is connected with the rear-end low-temperature Dewar in a sealing manner, and the outer end of the sample rod outer rod extends outwards; the inner end of the inner rod of the sample rod extends into the rear-end low-temperature Dewar and realizes heat conduction with the rear-end low-temperature Dewar, and the outer end of the inner rod of the sample rod extends out of the outer rod of the sample rod along the axial direction; the sample rod front-end assembly comprises a front-end outer frame and a front-end metal block, the front-end outer frame is connected with the front end of the sample rod outer rod, the front-end metal block is connected with the sample rod inner rod, the front-end outer frame and the front-end metal block are fixed in a non-conductive mode, and a heating chip is fixedly placed on the front-end metal block. Compared with the prior art, a traditional heating coil is omitted, the sample pollution and temperature drift risks are reduced, and the stability, applicability and the like of an in-situ heating experiment of the transmission electron microscope are improved.