373 results about "Chemical test" patented technology

Methods and electronic devices for performing color-based reaction testing of biological materials. The method includes capturing and interpreting digital images of an unexposed and later exposed paddle at various delay times within an automatically calibrated environment. The test paddle includes a unique identification mechanism (UID), a Reference Color Bar (RCB) providing samples of standardized colors for image color calibration, compensation and corrections, and several test-specific sequences of Chemical Test Pads (CTP). The method further includes locating the paddle in the image, extracting the UID and validating the paddle, extracting the RCB and locating the plurality of CTP in each image. The method further reduces image noise in the CTP and calibrates the image automatically according to lighting measurements performed on the RCB. To determine test results, the method further determines several distances between the CTP and its possible trajectory in the color space described by the Manufacturer Interpretation Color Chart.

The invention provides a test paper reading method and a test paper reading device, which can read dry chemical test paper strips, colloidal gold immunochromatograohic assay test paper strips/cards and rapid pesticide residue test cards, are easy to operate, need no extra detection instrument and equipment, can automatically judge and read the detection result by only acquiring corresponding developing pictures through electronic equipment such as computers or mobile phones, have reliable testing accuracy and are particularly suitable for personal and household wide application. The method comprises the following steps: A. acquiring images; B. processing the acquired images; C. performing negative and positive discrimination; and D. performing concentration conversion on a sample which is discriminated to be positive in the step C through a concentration-gray scale relation to obtain a concentration value of the to-be-tested paper card/strip. The device comprises a shell and a built-in standard gray scale strip, wherein the shell is provided with a standard gray scale strip display window and is also provided with a first card slot, a second card slot and a third card slot for arranging the colloidal gold card, the rapid pesticide residue test card and the dry chemical test paper respectively.

The present invention is directed novel lateral flow devices for analyzing liquid samples. The devices contain chemical test strips and are useful for testing liquids for physical properties, such as pH, specific gravity, contamination or adulteration, the presence of proteins or blood, and the like. The test strips contain a bibulous material, a filter element, a reagent pad, and in some embodiments also contain a hydrophobic member and a cover. Any fluid can be tested, for example, urine or other body fluids, environmental samples, biological samples, clinical samples, or food and beverage samples.

A specimen cup (100) has slide-in cassette (102) hermetically sealed in a chamber (104), with a outer partition being transparent. The cassette comprised chemical test strips (106) used to provide testing of drugs of abuse or other chemical or biological substances. The cassette is designed to draw urine up from the front bottom of the cup, thereby reduces the amount of urine required to perform the test. Further the cassette is designed to form isolated test channels through the use of strategically placed vertical and horizontal bars which are hermetically sealed. The cup further comprises a spill prevention flap or float (108) and an optionally enlarged sample collection portion (110) for its operation. The windows of the test cassette are covered with transparent fluid-resistant plate to prevent urine from accidentally spill onto the strips.

A lateral flow immunoassay contact chemical test device and method integrates sample collection, prescreen testing, and confirmation sample collecting and storing with a single device and a minimum of steps. While particularly advantageously used with an oral fluid sample absorbed directly from a person's mouth, (in which constant monitoring of a collection process is made possible), the test device may be used with any of a variety of sample fluids. Prescreen testing and confirmation testing are performed on a single sample. Prescreen testing is performed by a lateral flow assay. The sample collection pad is subsequently separated from the wicking path to prevent continued migration from, and backflow into the sample collection pad, so that the confirmation sample is preserved in the sample collection pad. A multitude of antigens can be detected with a single device.

The present invention relates to rhamnolipid-based formulations to clean, disinfect, deodorize, and act as an antimicrobial and antifungal agent for living and working environments. In addition, the present invention relates to the use of rhamnolipids to create a bio-film when applied to a surface, which prevents the growth of bacteria and fungus. This technique is especially useful to create clean surface areas for medical procedures, chemical testing, during food preparation, as well as for daycare centers and hospitals.

The invention discloses a test tube cleaning and drying device for chemical tests and belongs to the field of test tube cleaning and drying devices. The technical problems that test tubes cannot be cleaned thoroughly and cannot be stored immediately after being cleaned are solved. As for the structure, the test tube cleaning and drying device comprises a box body. The interior of the box body is divided into a cleaning cavity and a drying cavity, and the cleaning cavity communicates with the drying cavity in the left-right direction. A test tube moving device is fixed in the box body. A grid-shaped test tube fixing plate is fixed to the test tube moving device. A plurality of brushing holes are formed in the test tube fixing plate. A test tube fixing clip is fixed in the position of each brushing hole in the test tube fixing plate. The cleaning device comprises a flushing device and a brushing device. The flushing device is fixed to the position above the test tube fixing plate. The brushing device is fixed below the test tube fixing plate. A drying device body is fixed to the position above the test tube fixing plate. The test tube moving device, the flushing device, the brushing device and the drying device body are all connected to a controller. By the adoption of the test tube cleaning and drying device, the test tubes can be cleaned thoroughly and dried.

In one embodiment, a diagnostic system for biological samples is disclosed. The diagnostic system includes a diagnostic instrument, and a portable electronic device. The diagnostic instrument has a reference color bar and a plurality of chemical test pads to receive a biological sample. The portable electronic device includes a digital camera to capture a digital image of the diagnostic instrument in uncontrolled lightning environments, a sensor to capture illuminance of a surface of the diagnostic instrument, a processor coupled to the digital camera and sensor to receive the digital image and the illuminance, and a storage device coupled to the processor. The storage device stores instructions for execution by the processor to process the digital image and the illuminance, to normalize colors of the plurality of chemical test pads and determine diagnostic test results in response to quantification of color changes in the chemical test pads.

The invention relates to a corrosion test device with a field in-situ electrochemical test function in a natural sea area environment, belonging to the technical field of electrochemical corrosion tests. The main structure of the corrosion test device comprises a reference electrode lead wire, an auxiliary electrode lead wire, an auxiliary electrode, a reference electrode, a probe shell, a samplesealing structure shell, a sealing ring, a pressure spring, a fastening bolt, a sample and a sample lead wire, wherein an electrochemical test probe and a sample sealing structure are designed into split type structures; the electrochemical test probe consists of the reference electrode, the reference electrode lead wire, the auxiliary electrode and the probe shell and is rotated to the sample sealing structure through screw threads positioned at the front of the probe shell; the sample sealing structure shell is processed by and made of plastic and nylon or other non-metal materials; and thesample or the researched electrode is hermetically fixed by the O-shaped sealing ring and sealing stuffing. The invention has simple and reliable structural principle, convenient use and operation andgood test accuracy.

The invention relates to a device for testing abrasion property and corrosion electrochemistry of a corrosion product film, and belongs to the technical field of corrosion simulation experiment and electrochemistry test. The device consists of main parts such as an electric motor, a sealing cover, a rotary disc, a friction block, a sample table, a three-electrode electrochemistry test system, an external electrochemistry test instrument, a thermostatic water bath, and the like; and the rotary friction block of the rotary disc abrades a sample, an electrochemistry test adopts a three-electrode system, and the electrochemistry sample as a working electrode, a platinum wire as a reference electrode surrounding the periphery of the electrochemistry sample and a saturated calomel electrode to form the three-electrode system. The device can measure the abrasion resistant property of the formed corrosion product film, and simultaneously measure electrochemical parameters for the samples covered by the corrosion product film during abrasion to obtain electrochemical parameter values at different time of abrasion of the corrosion product film.

The invention discloses a chemical test tube mechanical cleaning device, and belongs to the field of chemical supplies. The chemical test tube cleaning device is composed of an automatic rotation water spraying hairbrush, motors, small-sized cylindrical water channels, a stand column, a tube brushing machine base platform, an air cylinder, air holes, a conveyor belt, an operating platform and a micro sensor. The stand column is used for supporting the upper air cylinder, an air cylinder piston is connected with a tube brushing device, and one end of a test tube brush is connected with the motors. The motors are separated from a water inlet in the tail portion of the test tube brush through the small-sized cylindrical water channels. The rotation hairbrush is in a thin-wall hollow type, six small water spraying holes are punched in the working position of the hairbrush, two water inlet holes are punched in the hollow positions, corresponding to the small-sized cylindrical water channels, of the hairbrush, an outer water inlet is formed in the upper portion of a test tube brush box, and the micro sensor is placed at the lower right corner of the test tube brush box. Nine novel rubber plugs are mounted inside a test tube clamping box, and the conveyor belt is used for conveying the test tube box so that cleaning can be achieved. The chemical test tube cleaning device has the advantage that a large number of test tubes can be efficiently cleaned through the device.

This invention discloses one electrical chemical test method for rotation single phase impulse erosion test, which comprises the following steps: processing the specimen into work electrode fixed onto test device and adjusting work, reference and aid electrode distance and the capacitor top is added with test erosion liquid with 75mm higher than the liquid; in static erosion medium liquid adopting electrical chemical method for anti-erosion till the current reduces to small to make the work electrode surface form even erosion product protection film; starting transducer motor and pre-setting acceleration curve through computer to observe constant level current curve change till there is burst.

The invention relates to a detecting test paper, in particular to a dry chemical test paper for detecting the content of the analyzed object in the blood sample. The detecting test paper comprises a sample adding layer, a reacting layer, a base plate and a liquid-locking component, wherein the sample adding layer, the reacting layer and the base plate are vertically arranged from the top to bottom; at least one side of the reacting layer is provided with the liquid-locking component; and the speed of the liquid-locking component for absorbing the liquid is less than or equal to the speed of the reacting layer for absorbing the liquid. As the liquid-locking component is capable of absorbing the redundant liquid sample, the redundant sample does not flow out of the range of the test paper, and the phenomenon of polluting the environment or the sample contacting to the detector is avoided.

The invention relates to an ionic liquid system electrochemical process in-situ research device. According to the device, an in-situ photo-electrochemical tank is adopted as a core. Under the control and adjustment of a multifunctional automatic adjusting rack, devices such as a flow injection analyzer, an in-situ infrared spectrometer, a Raman spectrometer, a metallurgical microscope, a multi-channel electrochemical workstation, a quartz crystal microbalance, and the like can be applied in combination. Detection liquid is placed in the in-situ photo-electrochemical tank, and a reaction process is subjected to real-time monitoring by using a computer control system. With the device provided by the invention, on a basis of conventional electrochemical tests, morphology, structure, composition, concentration change characterizations upon electrode surface/interface sediment, electrolyte, decomposition products, gas product, and the like can be realized, and powerful support can be provided for ionic liquid electrochemical process researches. The device has the characteristics of compact structure, high operation automation degree, precise detection, reasonable design, and the like.

The invention discloses a welding structure for an inner container longitudinal seam of a stainless steel gas cylinder and a welding method. The welding structure comprises a strip-shaped auxiliary board, wherein a main gas guide hole and a gas guide groove are formed in the strip-shaped auxiliary boar in the length direction; the main gas guide hole and the gas guide groove are arranged in parallel; a plurality of gas guide small holes are formed between the main gas guide hole and the gas guide groove; the two ends of the gas guide small holes are respectively communicated with the main gas guide hole and the gas guide groove; and the cross section of the gas guide groove and the cross section of the longitudinal seam to be welded are positioned in the same plane. The welding method comprises the following steps: rolling round; carrying out butt welding and spot welding; carrying out spot welding on run-on plates and run-off plates; clamping; and welding. According to the invention, an MIG automatic welding process is adopted, so that the primary input-cost of welding equipment is low; in a later using process, the input using and maintenance costs are relatively low and the working efficiency is improved greatly. By adopting the process in the invention, the qualification rate of nondestructive testing reaches 99.4% or above in an actual longitudinal seam welding process of an insulated gas cylinder and a cylinder for an LNG vehicle; and physical and chemical test projects completely meet standard requirements.

The invention belongs to the in vitro clinical diagnosis reagent field and specifically relates to a dry chemistry test paper which quantitatively determines the activity of alanine aminotransferase in human body; the dry chemistry test paper consists of an upper and a lower supporting layers in long-belt-shapes; a loading hole, a substrate layer, a visualization layer and a test hole are provided in a test area from top to bottom; the substrate layer can adopt the materials such as glass fibre, filter paper and non-woven fabrics and is soaked with reagents such as a substrate; the visualization layer is composed of various filter papers, non-woven fabrics or synthetic film and is soaked with reagents such as chromogen. A sample penetrates into the substrate layer through the loading hole and flows to a sample surface of the visualization layer; a liquid with detected ingredients penetrates to a detecting surface; the color of chromogen is changed under chemical reaction; the liquid penetrates through the test hole on the lower supporting layer and reaches the detecting surface of the visualization layer; the photodensity of the liquid can be determined on the detecting surface. The test paper is used to rapidly test the activity of alanine aminotransferase in whole blood, serum or plasma in the human body, which is one of important indexes of the detection of liver function.

The invention discloses a comprehensive judgment method for buried gas metal pipeline corrosion caused by stray current nearby subway lines. The method comprises steps as follows: 1, arrangement and analysis of background and general situation: technological parameters, past operation conditions and the like of a pipeline are known; 2, inspection and test analysis: after a faulted pipeline with abnormal leakage is sampled, the sample is subjected to check analysis with various devices and multiple physical and chemical test means; 3, comprehensive discussion, analysis and judgment: an acting form of the stray current on pipeline corrosion morphology is judged, a mutual relation between failure mechanisms is discussed, a failure reason is found out and a solution is given. By means of comprehensive analysis for corrosion failure, caused by the stray current nearby the subway lines, of the buried gas metal pipeline, new stray current corrosion morphology feature reference and failure mechanism theoretical support are provided, the failure reason of the pipeline can be accurately judged, and an effective solution is proposed. The method has great reference significance and practical application value for failure analysis of various oil and gas transmission pipelines and pipelines with different diameters, model and textures in different environments.

The invention belongs to the field of ocean engineering technology, and specifically relates to a deep-sea field erosion electrochemical testing device and a testing method thereof. The deep-sea field erosion electrochemical testing device comprises a pressure-proof watertight electronic cabin, an erosion electrochemical testing system arranged in the pressure-proof watertight electronic cabin, a plug-in type electrode system integrated outside one end of the pressure-proof watertight electronic cabin, and a porous screening cover; the erosion electrochemical testing system is connected with the plug-in type electrode system through a wire; and the porous screening cover is arranged at one end of the pressure-proof watertight electronic cabin, and the plug-in type electrode system is covered by the porous screening cover. The deep-sea field erosion electrochemical testing device can be used for developing in-situ real-time rapid detection operation under deep-see conditions, and has characteristics of high pressure resistance, water seepage prevention, erosion resistance, strong anti-jamming capability, small size, high strength, good insulating and sealing properties and the like.

The invention belongs to physico-chemical test technology, and relates to a method for measuring depth of an alloy steel decarbonized layer. In the invention, the method for measuring the depth of the alloy steel decarbonized layer is characterized in that an image signal output terminal of a scanning electron microscope is connected with an input terminal of an X-ray energy spectrometer, the scanning electron microscope is used for measurement and analysis; and the X-ray energy spectrometer is used for analysis and verification. The method comprises the following steps of firstly cutting a sample; carrying out surface treatment on the sample; cleaning the sample; subsequently placing the sample in the scanning electron microscope and vacuuming the scanning electron microscope; adjusting parameters of the scanning electron microscope and carrying out organization form analysis; subsequently collecting images to carrying out energy spectrum analysis at two sides of a measuring point at a half position of a transition area; verifying a carbon ingredient; and finally completing the measurement on the depth of the decarbonized layer. The method can carry out exact analysis on the depth of the alloy steel decarbonized layer, can be operated simply and conveniently, and can meet the requirement of practical scientific research production and failure analysis.

The invention discloses an artificial intelligence cleaning device for chemical test tubes, which includes a fixed seat, a bevel gear plate is connected to the top of the first rotating shaft, and transmission gear plates are meshed on both sides of the top of the bevel gear plate , one side of the transmission gear plate is connected with a rotating rod, the clamping device includes a clamping ring, both sides of the bottom of the clamping ring are connected to the connecting plate through a strut, one of the first support The side is connected with a second support through a compression spring, the top of the connection seat is connected with an electric push rod, both sides of the water tank are connected with a spray pipe through a branch pipe, and the top of the second shaft is connected with a second motor. , the bottom of the second rotating shaft is connected with a cleaning rod, and the outside of the cleaning rod is equidistantly provided with bristles. The invention has the advantage of not needing to manually clean the test tubes, and solves the problem that the chemical test tubes are very inconvenient to clean and the cleaning efficiency of the test tubes will be reduced.

The invention belongs to the technical field of biosensing, and relates to a dry chemical test strip used in quantitative test of uric acid and a preparation method thereof. The uric acid quantitative-test dry chemical test strip provided by the invention comprises an insulating substrate, electrodes and an anti-interference enzyme layer printed on the insulating substrate with a screen printing technology, and a siphonic reaction cell composed of a double-sided adhesive, a hydrophilic membrane, and the enzyme layer. According to the invention, with an electrochemical method, uric acid oxidation is catalyzed, and urate oxidase is not needed to participate in the reaction. Therefore, testing precision can be improved, cost can be reduced, and uric acid content can be tested in a short time.

The invention belongs to the establishment of a novel chemical test method, and particularly relates to a specific method for determining zirconium and impurity contents in uranium-zirconium alloy by inductively coupled plasma emission spectrometry. The invention establishes the test method for determining impurity elements and zirconium in uranium-zirconium alloy by plasma emission spectrometry. A sample is dissolved by nitric acid-hydrochloric acid mixed acid and hydrofluoric acid, matrix interference is eliminated by a matrix matching method and a multispectral fitting correction method, and a plasma emission spectrometer is used for detecting the contents of elements to be detected. The method is accurate and reliable, and meets the index requirement of the analysis technique of the project.

The invention relates to a chemical test method for earth and crop nutrient. It includes the following steps: earth sample gathering and processing, rapid testing earth alkali-hydrolyzable nitrogen, rapidly available phosphorus, and rapidly available potassium, gaining the tested liquid of earth or crop and dropping into the two holes in dropping board, comparing the standard color gradation and calculating rapid test value by regression equation. The advantages of the invention are easy to operate, rapid, certain accuracy, and convenient to carry, etc.