58results about How to "Detection concentration" patented technology

The invention provides a heavy metal detection device and a preparation method thereof. The device comprises a quartz crystal microbalance, and is characterized in that: polymer fibers are deposited on the electrode of the quartz crystal microbalance; a metal film is sprayed on the polymer fibers; and a sensing material is covered on the metal film. The preparation method is characterized by comprising the following steps: dissolving a spinning polymer raw material in a solvent to obtain an electrospinning material; performing electrostatic spinning by using the electrospinning material; depositing the fibers onto the electrode of the quartz crystal microbalance; spraying the metal film on the fibers; and placing the electrode of the quartz crystal microbalance in a container containing solution of the sensing material for soaking, and taking the electrode out to obtain the heavy metal ion detection device. The device has the advantages of high sensitivity and accurate and quantitative detection.

The invention relates to a single well-injection and water-suction tracer experiment simulation analysis system. The single well-injection and water-suction tracer experiment simulation analysis system comprises a well body, a geological water-containing layer simulation module, an overflow device, a distilled water box, a tracer box, a sucked liquid storage box, and a background data processing and simulation analysis terminal, wherein a water containing area and a flow stabilizing area, which are communicated with each other, are arranged in the geological water-containing layer simulation module, and are respectively filled with a water-saturated medium and a flow stabilizing medium; the well body and the overflow device are respectively communicated with the water containing area and the flow stabilizing area; a liquid inlet pipe and a liquid outlet pipe are arranged on the well body, and the distilled water box and the tracer box are respectively communicated with the liquid inlet pipe through pipelines; one end, away from the well body, of the liquid outlet pipe is communicated with the sucked liquid storage box; a plurality of layers of liquid concentration sensors are uniformly distributed in the water containing area, and a plurality of liquid concentration sensors are arranged on each layer; the liquid concentration sensors are electrically connected with the background data processing and simulation analysis terminal. The single well-injection and water-suction tracer experiment simulation analysis system has the advantages that the structure is simple, the operation is convenient, and the testing of single well-refilling and water suction tracer experiment can be performed at high accuracy and high frequency.

The invention discloses a novel fluorescence probe for specific detection of mercury ions. The novel fluorescence probe has high recognition selectivity for mercury ions, and has the advantages of easy synthesis, accessible materials, high yield and the like. The prepared fluorescence probe is a non-fluorescence substance, and can detect the mercury ion concentration on the basis of fluorescence enhancement and chroma enhancement.

The invention discloses equipment for detecting the concentration of combustible gas in a silo. The equipment comprises a gas collection device and a gas analysis device (20), wherein the gas collection device comprises at least one gas collection head (11) for collecting gas from at least one silo, a gas pump (12) and a first electromagnetic directional valve (13); the at leas one gas collection head (11) is connected with the inlet of the gas pump (12) through a pipeline; the outlet of the gas pump (12) is connected with the inlet of the first electromagnetic directional valve (13); the gas analysis device (20) is used for receiving the gas output by the outlet of the first electromagnetic directional valve (13) and collected by the at least one gas collection head (11), detecting the composition and concentration of the combustible gas in the gas, and outputting a signal indicating the composition and concentration. The equipment provided by the invention can detect the concentration of the combustible gas in the silo.

The invention relates to the technical field of biology, and discloses a method for detecting Escherichia coli in water and a detection culture solution. The method comprises the following steps: providing a series of Escherichia coli suspensions with different concentrations, filtering, concentrating, adding into the detection culture solution, culturing, recording the characteristic time of the Escherichia coli suspensions with different concentrations, and establishing a linear equation on Escherichia coli suspension concentration and characteristic time; filtering and concentrating a water sample to be detected, adding into the detection culture solution, culturing, recording the characteristic time of the water sample to be detected on the premise that the 410nm absorbance has obvious changes, and substituting the characteristic time in the linear equation to obtain the concentration value. On the basis of the principle of the enzyme substrate process, by using absorbance and fluorescence intensity as the standard and adopting the detection culture solution suitable for Escherichia coli, the method can quickly and accurately detect the concentration of Escherichia coli in water and can monitor the microbial contamination condition in water in real time.

The invention discloses a full-solid urase electrode and a preparation method thereof and belongs to the technical field of electroanalytical chemistry detection. The urase electrode is prepared through the following steps: printing metal oxide and urase onto a substrate by utilizing a screen printing technology; and forming a layer of uniform complex film on the surface of an electrode. The urase electrode prepared by the invention can be directly applied to the rapid detection on the concetration of urea, is good in catalytic performance and is high in stability. The urase electrode is small and portable, rapid in response, simple in manufacturing process, low in manufacturing cost, suitable for volume production and especially suitable for real-time detection such as field rescue, clinical examination and environmental monitoring.

The invention provides a ventilation system control method and device and an air conditioner. The method comprises the steps that the indoor carbon dioxide concentration is obtained; a ventilation unit is controlled to be started according to the indoor carbon dioxide concentration, and fresh air is introduced an indoor; after the ventilation is started, the ventilation unit is controlled to be closed according to the indoor carbon dioxide concentration and the carbon dioxide concentration change trend; and the carbon dioxide concentration change trend is obtained by detecting a first-order derivative f (x) of the carbon dioxide concentration. By arranging a carbon dioxide concentration sensor and the ventilation unit, the indoor carbon dioxide concentration is detected in real time, the first-order derivative of the carbon dioxide concentration is accurately calculated, the indoor carbon dioxide concentration change can be accurately and reliably fed back in real time, the ventilationunit is accurately regulated and controlled to introduce outdoor fresh air into the indoor, and the ventilation unit is controlled to be opened and closed; erroneous judgment caused by abnormal signals is avoided, the data accuracy and stability are effectively guaranteed, and the indoor air quality is improved.

The invention discloses a device and method for detecting concentration of a D-fructose solution. The device comprises a computer and a data acquisition device, wherein the data acquisition device comprises an electrochemical workstation, a container, a working electrode and a counter electrode, a cover plate is arranged at the top of the container, the working electrode and the counter electrode are oppositely arranged below the cover plate, a guide slot is formed in the cover plate, a conveying mechanism is arranged in the guide slot, the guide slot comprises an involute-shaped through slot and a groove in head-to-tail connection with the through slot, the top of the working electrode is connected with a first connection column, the first connection column penetrates through the cover plate and is positioned at the center of an involute base circle of the through slot, the top of the counter electrode is connected with a second connection column, the second connection column is fixed on the conveying mechanism and penetrates through the through slot, the top end of the first connection column is fixedly connected with the top end of the second connection column through a telescopic rod, the cover plate is connected with a lifter for driving the cover plate to move up and down, and a stirring mechanism is arranged at the bottom of the container. By adopting the device and method disclosed by the invention, the concentration of the D-fructose solution can be rapidly and accurately detected.

The invention discloses a device and method for detecting concentration of an L-rhamnose solution. The device comprises a computer and a data acquisition device, wherein the data acquisition device comprises an electrochemical workstation, a container, a working electrode and a counter electrode, a cover plate is arranged at the top of the container, the working electrode and the counter electrode are oppositely arranged below the cover plate, a guide slot is formed in the cover plate, a conveying mechanism is arranged in the guide slot, the guide slot comprises a through slot and a groove in head-to-tail connection with the through slot, the top of the working electrode is connected with a first connection column, the first connection column penetrates through the cover plate and is positioned at the center of a base circle of the through slot, the top of the counter electrode is connected with a second connection column, the second connection column is fixed on the conveying mechanism, the top end of the first connection column is fixedly connected with the top end of the second connection column through a telescopic rod, a first proximity switch and a second proximity switch are arranged at front end and back end of the through slot respectively, and the cover plate is connected with a lifter for driving the cover plate to move up and down. By adopting the device and method disclosed by the invention, the concentration of the L-rhamnose solution can be rapidly and accurately detected.

The invention provides a method and a system for detecting the concentration of trace gas on an open optical path based on a spectral absorption principle. The system is provided with a PCB control circuit, a laser emitter and a photoelectric detector, wherein the laser emitter and the photoelectric detector are respectively connected with the PCB control circuit; wherein the PCB control circuit comprises an MCU module, an amplifying and filtering module, a phase shift and phase sensitive detection module, an ADC sampling module and a self-calibration module, a collimating lens is arranged between the laser emitter and detected gas, an aspherical mirror is arranged between the photoelectric detector and the detected gas, the aspherical mirror gathers reflected laser to the photoelectric detector, the photoelectric detector is used for measuring reflected light power. The technical problems that an existing laser detection method cannot avoid interference of environmental noise, circuits and algorithms are complex, and cost is high are solved. The method and the system can be widely applied to gas concentration detection.

The invention provides a cell counting instrument and an application thereof and relates to the technical field of biological particle detection. The cell counting instrument comprises a positive pressure control unit, a negative pressure control unit, a counting module, a processing system, an effluent container and a sheath fluid container, wherein the counting module comprises a micro-fluidic chip. Due to the arrangement of a liquid inlet, a feeding hole, an effluent hole and a micro-channel on the micro-fluidic chip and the arrangement of an electric pulse signal detection area on the micro-channel, the whole liquid flow system is more compact and effective and the absolute counting of whole sample amount is realized, so that the result accuracy and consistency of cell counting are better than those of the present method and the problems of low integration level of the instrument, small detected sample amount and inaccurate result caused by cell layering and suspension in the priorart can be relieved. The counting module is designed in a detachable form, so that the flexibility of the cell counting instrument system is promoted and the cell counting instrument can meet different detection requirements of users. The invention also provides the application of the cell counting instrument.

The invention particularly relates to an air quality detector. The air quality detector comprises a fan, a laser generator, a silicon photocell, a photodiode, an analog signal conditioning circuit, an analog-to-digital conversion circuit, a calculation and judgment circuit and a display, wherein the laser generator is arranged in the air outgoing direction of the fan, and the laser outgoing direction of the laser generator is parallel with the illumination plane of the silicon photocell; an input end of the photodiode is connected with the silicon photocell, and an output end of the photodiode is connected with an input end of the analog signal conditioning circuit; an output end of the analog signal conditioning circuit is connected with an input end of the analog-to-digital conversion circuit, an output end of the analog-to-digital conversion circuit is connected with an input end of the calculation and judgment circuit, and an output end of the calculation and judgment circuit is connected with the display. With the adoption of the technical scheme, the concentration of solid particulate matters in the air can be detected by the aid of a laser source.

The invention discloses a quad-rotor unmanned helicopter for detection of poisonous and harmful gases. The quad-rotor unmanned helicopter comprises propellers, brushless electric machines, a main operating body, a signal transceiver and a controller, a control device is installed at the position of the inner center of the main operating body, a four-in-one brushless electric machine is installed inside the controller, a high-frequency shock absorber and a chip are installed on one inner side of the main operating body, a height sensor and a speed sensor are installed on the other inner side of the main operating body, a poisonous and harmful gas concentration detector is installed on the upper surface of the main operating body, a poisonous and harmful gas component detector is installed on the lower surface of the main operating body, a camera is installed on one side, close to the speed detector, of the exterior of the main operating body, and an alarm is installed at the top end of the controller. The quad-rotor unmanned helicopter has the advantages of stable and intelligent control on operation, and operation efficiency is greatly improved.

The invention discloses a hood control system capable of detecting carbon monoxide concentration. The system comprises a carbon monoxide concentration detection module, a buzzer, a display module and a fan driving module, wherein the carbon monoxide concentration detection module, the buzzer, the display module and the fan driving module are connected with a single chip computer. The carbon monoxide concentration detection module comprises a carbon monoxide sensor and a current amplifying circuit. The output end of the carbon monoxide sensor is connected with the input end of the current amplifying circuit. The output end of the current amplifying circuit is connected with the input pin with an AD conversion function in the single chip microcomputer. According to the invention, the carbon monoxide concentration in the kitchen environment of a user is detected in real time by the action of the carbon monoxide detection module; when the carbon monoxide concentration exceeds an allowable value, the buzzer sends an alarm to remind the user to take further measures; and if a hood is already running, the system can automatically increase the rotation speed of a fan to discharge carbon monoxide to prevent carbon monoxide poisoning.

The invention relates to a detection method of chlorphenamine maleate components, and particularly discloses a quick screening method of chlorphenamine maleate doped in Chinese patent drugs and health-care food. The method comprises the following steps of: (1) extracting chlorphenamine maleate in Chinese patent drugs or health-care food with water; (2) adding a chromotropic acid water solution color reagent into the extracting solution; (3) adding an acidic buffer salt solution; and (4) adding dichloromethane into the solution for extracting, absorbing the dichloromethane layer, and observing the color. The inspection method disclosed by the invention is quick, simple and convenient, has the advantages of strong specificity, high accuracy, rapid response and wide range of application, is suitable for inspecting whether chlorphenamine maleate is doped in Chinese patent drugs and health-care food on the site, and can initially judge the content of chlorphenamine maleate.

The invention discloses a concentration detection device and method for a D-fructose solution. The device comprises a computer and a data acquisition device, wherein the data acquisition device comprises an electrochemical workstation, a container, a working electrode and a counter electrode, a cover plate is arranged at the top of the container, the working electrode and the counter electrode are oppositely arranged below the cover plate, a guide slot is formed in the cover plate, a conveying mechanism which can move along the guide slot is arranged in the guide slot, the guide slot comprises an involute-shaped through slot and a groove in head-to-tail connection with the through slot, the top of the working electrode is connected with a first connection column, the first connection column penetrates through the cover plate and is positioned at the center of an involute base circle of the through slot, the first connection column is in rotating connection with the cover plate, the top of the counter electrode is connected with a second connection column, the second connection column is fixed on the conveying mechanism and penetrates through the through slot, the top end of the first connection column is fixedly connected with the top end of the second connection column through a telescopic rod, and a stirring mechanism is arranged at the bottom of the container. By adopting the device and method disclosed by the invention, the concentration of the D-fructose solution can be rapidly and accurately detected.

The invention provides a BP180 IgE antibody concentration detection kit and a detection method and an application thereof and belongs to the technical field of IgE detection methods. The kit comprisesa microporous strip, standard serum I, standard serum II, an enzyme labeled antibody solution, a buffer solution for reaction, a cleaning buffer solution, an enzyme matrix solution, a stop solution,a sealing plate and a pasting film. According to the BP180 IgE antibody concentration detection kit and the detection method and the application thereof provided by the invention, rapid detection of the BP180 IgE antibody in serum of an NBP patient is greatly facilitated, meanwhile, the concentration of the BP180 IgE antibody in the serum of a patient can be rapidly and effectively detected, so the concentration of the BP180 IgE antibody is used as one of secondary indexes of NBP diagnosis, furthermore, the BP180 IgE antibody in serum of a patient is detected by the BP180 IgE antibody concentration detection kit, and the BP180 IgE antibody concentration detection kit can further be used as one of indexes for evaluating the severity degree of the NBP disease.

The invention discloses a rapid detection method of glutathione. The detection method specifically comprises the following steps of mixing a chitosan solution, an H2O2 solution and a 3, 3', 5, 5'-tetramethyl benzidine soluction to react, and then respectively adding the glutathione solutions with different concentration gradients into a mixed reaction system to continuously react, and observing the color of the solution added with the glutathione with different concentration gradients by naked eyes and photographing through a camera after the reaction is finished so as to semi-quantitatively detect the concentration of glutathione according to the color of the solution to be detected; or measuring the absorbance of the solution by using an ultraviolet spectrophotometer, constructing a linear relationship between the absorbance and the concentration of glutathione, and rapidly detecting the concentration of glutathione in the solution to be detected by using the linear relationship. Themethod has the advantages of being simple to operate, being able to realize the semi-quantitative and quantitative detection of glutathione rapidly and flexibly, and has the good application prospect.

The invention relates to a system for detecting a corrosive gas concentration in air. The system comprises an absorbing container, a buffering container and an air pump which are connected successively. A certain amount of deionized water is pre-placed in the absorbing container. While the air pump is operated, the air is pumped from the corrosive gas sampling place by the air pump through the absorbing container and the buffering container, the deionized water in the absorbing container can absorb a corrosive gas in the pumped air, and the buffering container is used for preventing the waterfrom entering the air pump, wherein the corrosive gas concentration C1 in the air of the corrosive gas sampling place is calculated by the following formula: C1=C0*V0/71/(T*Q/Vm). The system has the beneficial technical effects of pertinence detection of the corrosive gas, smaller measuring error, and better measuring stability and reliability.

The invention discloses a controllable quantitative carbon dioxide supply device and belongs to controllable carbon dioxide concentration control equipment in intelligent plant growth cabinets. The detection of carbon dioxide concentration and quantitative control of carbon dioxide output and release quantity can be finished. The controllable quantitative carbon dioxide supply device comprises a carbon dioxide concentration detection module (1), a master control module (2) and a carbon dioxide generation device (3). The controllable quantitative carbon dioxide supply device is simple in structural design, convenient to operate and low in manufacturing cost and has a certain popularization and application value.

The invention provides a gas/liquid safety detection unit, which adopts a multi-layer structure design scheme, such that the concentration detection of the specified chemical component and the wireless transmission can be stably achieved, the structure is compact so as to easily miniaturize the whole volume of the gas/liquid safety detection unit, and the gas/liquid safety detection unit can be used for producing portable gas/liquid chemical component safety detection products. According to the present invention, the gas/liquid safety detection unit is convenient to use, and is only required to be carried, wherein the concentration of the specified chemical component in gases or liquids can be rapidly detected by placing the gas/liquid safety detection unit in the space of the detected gas, or immersing the detected liquid, or directly spraying the detected gas/liquid onto the gas/liquid safety detection unit, or dripping the detected liquid onto the gas/liquid safety detection unit during the use, such that the problem of the absence of the portable and rapid-detection gas/liquid safety detection product in the prior art can be well solved.

The invention discloses a detector for concentration of chromium ions in drinking water. The detector comprises a chromium ion probe, an analog-digital converter, an original data cache, a flash memory device, a controller and a display. The chromium ion probe is connected with the analog-digital converter which is connected with the original data cache, the original data cache is connected with the flash memory device and the controller respectively, and an output end of the controller is connected with the display. The detector can accurately and quickly detect concentration of chromium ions in drinking water, and a safe and healthy drinking water environment is created for people in daily life.

The invention discloses a hand perspiration symptom diagnosis instrument which comprises a shell, a test area is arranged at the top of the shell, test consumables are arranged in the test area, an atomizer is arranged in the shell, the test area is provided with a mist through hole connected with the atomizer, test electrodes in contact with the test consumables are arranged below the two sides of the test consumables, and the mist through hole is connected with the atomizer. The shell is provided with a display screen and a control button, and the test electrode is electrically connected with the display screen and the control button. The hand perspiration diagnosis instrument provided by the invention can be used for quantitatively detecting the hand perspiration amount of a patient, so that the hand perspiration severity of the patient is objectively evaluated.