69 results about "Hydrogen sulfide test" patented technology

The invention relates to the technical field of baby diapers, in particular to an intelligent baby diaper replacement reminding system integrated with hydrogen sulfide detection, which is used for determining a reference acquisition frequency of each time interval in a time period based on historical multi-dimensional monitoring data of a target user; then determining the necessity of hydrogen sulfide detection at the current acquisition moment based on the multi-dimensional monitoring data in the backtracking time window at the current acquisition moment, and then adjusting the reference acquisition frequency of the current time interval based on the necessity of hydrogen sulfide detection at the current acquisition moment to obtain a final acquisition frequency; acquiring multi-dimensional monitoring data based on the final acquisition frequency in the remaining time interval in the current time interval; and finally, based on the multi-dimensional monitoring data acquired in real time, generating a diaper replacement reminding signal.

The invention discloses a fluorescent covalent organic framework material for hydrogen sulfide detection as well as a preparation method and application thereof, relates to a covalent organic framework material as well as a preparation method and application thereof, and aims to solve the technical problems that an existing porous material for H2S detection is few in structure type, unstable in COFs (Covalent Organic Frameworks) structure, high in detection limit and harsh in detection environment. The periodic structure fragment of the fluorescent covalent organic framework material for hydrogen sulfide detection is shown in the specification. 3-(5, 10-diamino-1H-phenanthrene) [9, 10-d] imidazole-2-yl) phenol and 2, 4, 6-tri (4-formylphenoxy)-1, 3, 5-triazine are subjected to a reaction to obtain a hydroxyl intermediate, the hydroxyl intermediate is modified with 2, 4-dinitrofluorobenzene, and the fluorescent material is used for qualitative detection of H2S. The method is not interfered by amino acids and anions in the environment, and is not influenced by an acid-base environment. The method can be used in the field of H2S detection.

The invention belongs to the technical field of hydrogen sulfide detection, and discloses a batch quantification method for bacterial endogenous hydrogen sulfide yield. Materials (qualitative filter paper, a 96-well plate and a lead acetate solution) used in the method are cheap commercially available consumables, a used gel imaging system is also a laboratory basic instrument, and Fili imageJ is widely used free image processing software. Therefore, the method has the advantages of low cost, simplicity in operation, capability of quickly quantifying in batches and the like. Besides, membrane covering of the qualitative filter paper enables each pore of the 96-pore plate to be relatively closed, and meanwhile, different from a color developing agent directly added into the bacterial liquid, the measuring position is located above the bacterial liquid, so that accurate quantification is achieved, and growth and metabolism of bacteria are not affected at the same time. The method not only can realize accurate quantification, but also can detect the yield of hydrogen sulfide of different bacteria in batches, and is convenient to popularize and apply.

The invention belongs to the technical field of semiconductor oxide gas sensors, and particularly relates to an rGO / CuO / Li sensitive material, a preparation method thereof and application of the rGO / CuO / Li sensitive material in H2S sensors. The preparation method comprises the following steps: firstly, preparing a graphene oxide nanosheet by using an improved Hummers method, and then preparing the rGO / CuO / Li sensitive material by using copper nitrate, lithium chloride and the prepared graphene oxide nanosheet as raw materials, polyvinylpyrrolidone as a surfactant and N, N-dimethylformamide as a solvent by using a one-step solvothermal method. Under the condition of room temperature, the sensitive material shows a relatively high response value (220.1) and a relatively low detection lower limit (1ppb) on hydrogen sulfide, has good selectivity, repeatability and stability, and has a wide application prospect in trace-level hydrogen sulfide detection in the fields of industrial safety and atmosphere detection.

The invention belongs to the technical field of analysis and detection, and particularly relates to a fluorescent-Raman bimodal probe for hydrogen sulfide detection and a preparation method and application of the fluorescent-Raman bimodal probe for hydrogen sulfide detection. Specifically, 4-nitrobenzenethiol (4-NTP) modified silver nanocluster-gold nanoparticles are encapsulated in ZIF-8 to form the silver nanocluster / gold nanoparticle composite material. Compared with the prior art, the SERS probe material for hydrogen sulfide detection overcomes the defects that in the prior art, an SERS probe material for hydrogen sulfide detection is prone to interference and insufficient in reliability and sensitivity. According to the scheme, hydrogen sulfide is effectively enriched through introduction of the ZIF-8 metal organic framework, a detection signal is remarkably enhanced, the material can specifically recognize hydrogen sulfide, the response speed is high, the detection sensitivity is high, and the detection range is 10 <-13 >-10 <-3 > M.

The utility model relates to the technical field of pipeline pressurized gas detection equipment, in particular to a pipeline gas hydrogen sulfide detector which comprises a piston cavity, a piston is arranged in the piston cavity in a sliding mode, one end of the piston is connected with a driving mechanism capable of driving the piston to move, and the end, away from the driving mechanism, of the piston cavity is respectively connected with a first pipeline and a second pipeline. The first pipeline is provided with a control valve a, the other end of the second pipeline is connected with the side face of the piston cavity, the second pipeline is sequentially provided with a control valve c, an air pump, an H2S sensor and a check valve a, the side face of the piston cavity is further connected with a third pipeline, the third pipeline is connected with a control valve b, and the first pipeline is provided with a pressure sensor a. And a pressure sensor b is mounted on the piston cavity. The device has the characteristic of high-speed detection, is particularly suitable for an oil well pipeline hydrogen sulfide treatment scheme provided by an oil field at present, and meets the requirement of multi-point rapid detection.

The invention relates to a Bi2O3 / PTFE composite material and a preparation method and hydrogen sulfide detection application thereof.The Bi2O3 / PTFE composite material comprises Bi2O3 nanoparticles and PTFE nanofibers, the PTFE nanofibers are interwoven into a three-dimensional network structure, the Bi2O3 nanoparticles are distributed on the surfaces of the PTFE nanofibers and among pores of the three-dimensional network structure in a cluster mode, the Bi2O3 nanoparticles are embedded into the pores of the three-dimensional network structure, and the Bi2O3 nanoparticles are embedded into the pores of the three-dimensional network structure. The Bi2O3 nano particles are embedded on the surfaces of the PTFE nano fibers; the preparation method comprises the following steps: firstly preparing a first spinning solution and a second spinning solution, then preparing a precursor nanofiber membrane from the first spinning solution and the second spinning solution through bidirectional opposite spraying electrostatic spinning, and then sintering the precursor nanofiber membrane to obtain the product, the product is used for detecting whether hydrogen sulfide gas exists. The Bi2O3 / PTFE composite material disclosed by the invention is high in stability, and Bi2O3 nanoparticles are not easy to fall off; the preparation method is simple; the hydrogen sulfide detection is convenient, simple and portable.

The present invention discloses a chalcone-based fluorescent probe, its preparation method and application in detecting H2S, which relates to the technical field of hydrogen sulfide detection. The chalcone-based fluorescent probe of the present invention, the chemical formula of Cha-N3 is (E)-3-(4-azophenyl)-1-(2-hydroxy-4-methoxyphenyl)prop-2-en-1-one. This chalcone fluorescent probe has strong signal enhancement ability in the application of detecting hydrogen sulfide in aqueous environment. The fluorescence enhancement at the emission wavelength of 570 nm can reach 258 times, and qualitative analysis of hydrogen sulfide can be carried out by naked eyes. The detection limit is 122 nM, and it has the ability to monitor low-content hydrogen sulfide. At the same time, the monitoring of hydrogen sulfide in a variety of natural aqueous environments shows that it has strong anti-interference ability, and the fluorescence intensity of Cha-N3 shows a good linear relationship with the concentration of hydrogen sulfide.

This invention discloses an experimental apparatus and method for studying the hydrogen sulfide washing mechanism in sulfur-bearing gas reservoirs. The apparatus includes: a three-dimensional artificial core model, comprising a sealing layer and an artificial core, with the sealing layer covering the artificial core; a hydrogen sulfide detection mechanism, including a first hydrogen sulfide detector and multiple hydrogen sulfide probes, one end of which penetrates the sealing layer and extends into multiple detection areas within the artificial core, and the other end is electrically connected to the first hydrogen sulfide detector; at least one injection-production pipe, one end of which penetrates the sealing layer and extends into the artificial core; and a gas injection mechanism connected to the other end of the injection-production pipe. This invention can simulate the hydrogen sulfide washing process in actual gas reservoirs and can monitor the concentration changes of hydrogen sulfide in each detection area in real time, obtaining the hydrogen sulfide distribution in the artificial core. Therefore, this invention can be used to study the process and mechanism of hydrogen sulfide washing, providing preliminary predictions and parameter design for hydrogen sulfide washing experiments in real gas reservoirs, and interpreting the washing results.

The invention relates to the field of biomedicine, and discloses a preparation method and application of an I-type composite photosensitizer with hydrogen sulfide detection performance. According to the invention, TPA-CHO and MN are adopted as monomers, a Schiff base reaction is adopted to synthesize a triphenylamine derivative TPAB with an A-pi-D-pi-A conjugated structure, Cu < 2 + > is further introduced into TPAB molecules, and a stable metal complex composite photosensitizer is formed through a coordinate bond. The functional composite photosensitizer TPAB-Cu < 2 + > has the characteristic of mainly generating I-type ROS and has efficient photodynamic bactericidal activity in an anoxic drug-resistant bacterium infection environment, and in addition, the functional molecule can be applied to drug-resistant bacterium infection microenvironment hydrogen sulfide level detection so as to realize early warning of drug-resistant bacterium infection and real-time detection of a treatment process; the technical problems that in an existing photodynamic therapy, the oxygen dependence of a photosensitizer is high, and the response sensitivity and specificity of a drug-resistant bacterium infection microenvironment are insufficient are solved.

The application discloses a fluorescent / colorimetric dual-mode sensor for hydrogen sulfide detection and a preparation method thereof. The method comprises the following steps: synthesizing gold nanoclusters and metal-organic framework materials in situ to obtain a gold nanocluster / metal-organic framework composite material, uniformly mixing the composite material and sodium alginate to obtain a casting solution, and then dropping the casting solution on a substrate to perform scraping, molding and cleaning to obtain a gold nanocluster / metal-organic framework hydrogel membrane sensor. The sensor not only has a significant improvement in the fluorescence performance, but also can respond to hydrogen sulfide in the fluorescence and colorimetric channels respectively, and has the advantages of high sensitivity and high selectivity.

This application relates to the biomedical field and discloses a method for preparing a type I composite photosensitizer with both hydrogen sulfide detection capabilities and its uses. The invention synthesizes a triphenylamine derivative TPAB with an A-π-D-π-A conjugated structure using TPA-CHO and MN as monomers via a Schiff base reaction, and further incorporates Cu... 2+ By introducing TPAB molecules, a stable metal complex photosensitizer is formed through coordination bonds. This application presents the functional composite photosensitizer TPAB-Cu. 2+ Characterized primarily by the generation of type I ROS, it exhibits highly efficient photodynamic bactericidal activity in hypoxic environments infected with drug-resistant bacteria. Furthermore, this functional molecule can be used to detect hydrogen sulfide levels in the microenvironment of drug-resistant bacterial infections, enabling early warning and real-time monitoring of the treatment process. This solves the technical problems of strong oxygen dependence of photosensitizers and insufficient sensitivity and specificity in response to the microenvironment of drug-resistant bacterial infections in existing photodynamic therapies.

Provided is a hydrogen sulfide detection device capable of detecting the generation of hydrogen sulfide at a plurality of locations in a battery pack while reducing cost. This hydrogen sulfide detection device is provided with: wiring that electrically connects a first node and a second node; and a monitoring circuit that monitors a voltage between the first node and the second node. The wiring includes a plurality of exposed metal portions in which a metal that is corroded by reacting with hydrogen sulfide is exposed.

A hydrogen sulfide detection agent includes a polymer material as a substrate, a colorant configured to develop color by contact with hydrogen sulfide, and a color development promoter configured to promote color development of the colorant.

The present invention provides a hydrogen sulfide detection device that utilizes metal corrosion and is capable of suppressing the scattering of corroded metal particles. [Solution] The hydrogen sulfide detection device comprises a substrate having a pattern formed of a metal that corrodes in reaction with hydrogen sulfide. The pattern includes a detection unit that detects hydrogen sulfide by the corrosion of the metal exposed on the surface of the substrate. The detection unit is covered with a filter that allows hydrogen sulfide gas to pass through but prevents particles generated from the corroded metal from passing through.

A hydrogen sulfide detection device includes a substrate including a pattern formed from a metal that reacts with hydrogen sulfide to be corroded. The pattern includes a detection portion that detects the hydrogen sulfide by corrosion of the metal exposed on a surface of the substrate. The detection portion is covered by a filter formed to allow passage of a hydrogen sulfide gas and to block passage of particles generated from the corroded metal.

Provided is a hydrogen sulfide detection device capable of suppressing scattering of metal particles after corrosion in a hydrogen sulfide detection device using corrosion of a metal. The hydrogen sulfide detection device is provided with a substrate having a pattern formed of a metal that is corroded by reacting with hydrogen sulfide. The pattern includes a detection portion that detects hydrogen sulfide by corrosion of a metal exposed on the surface of the substrate. The detection unit is covered with a filter that is formed so that hydrogen sulfide gas passes therethrough and particles generated by the corroded metal do not pass therethrough.

The utility model discloses a protection structure for a hydrogen sulfide detector, and relates to the technical field of hydrogen sulfide detectors, the protection structure comprises a detector main body, mounting side plates and protection assemblies, the left and right sides of the detector main body are provided with the mounting side plates, and the outer sides of the mounting side plates are provided with the protection assemblies; the protection assembly comprises buffer springs, a protection plate, hollow grooves, rubber pads and air bag strips, the protection plate is elastically connected to the outer side of the mounting side plate through the three sets of buffer springs distributed at equal intervals, the two hollow grooves are formed in the protection plate, and the upper rubber pad and the lower rubber pad are bonded to the outer side of the mounting side plate. The symmetric center of the rubber pad coincides with the symmetric center of the hollow groove. According to the protection structure for the hydrogen sulfide detector, a rubber pad is matched with a plurality of air bag strips to play a role in compression resistance and protection, meanwhile, the protection plates on the two sides can perform buffer protection on the two sides of the detector main body under the matching of buffer springs, and the two protection structures can be synergistically stressed to perform full protection.

This invention discloses a hydrogen sulfide detection device for oil drilling sites, belonging to the field of hydrogen sulfide detection technology. It includes a supporting base plate, with a warning mechanism for directional alerting above the base plate. A detector is fixedly connected to the bottom of the warning mechanism. A support mechanism for supporting the detector and adjusting its height is fixedly connected to the upper surface of the base plate. The warning mechanism includes a warning component for alerting and an adjustment component for converging, amplifying, and directionally propagating the warning information from the warning component. The adjustment component is located on top of the warning component. Through the cooperation of multiple structures, the detection device can provide audible and visual alerts. During the alerting process, the converging structure converges the sound and light for directional propagation, thereby transmitting warning information to frontline workers at a distance, improving the warning effect of the detection device.

The invention discloses a preparation method and application of a high-stability hydrogen sulfide detection card, and the preparation method at least comprises the following steps: step I, dispersing dithizone in ethanol to obtain a dithizone solution; iI, dissolving lead acetate in water to obtain a lead acetate solution; iII, under the alkaline condition, mixing the dithizone solution obtained in the step I with the lead acetate solution obtained in the step II to obtain a dithizone-Pb complex; step IV, mixing the methanol solution containing tetrabutyl ammonium hydroxide, N, N-dimethylformamide, water and ethanol, and carrying out water bath reaction to obtain an alkaline silica gel solid carrier; v, dispersing the dithizone-Pb complex obtained in the step III into the alkaline silica gel solid carrier obtained in the step IV to obtain a dithizone-Pb complex solid carrier; and step VI, dispensing the dithizone-Pb complex solid carrier obtained in the step V on a thin film to obtain the hydrogen sulfide detection card. The detection card can be used for quantitative detection of hydrogen sulfide and drug sensitivity analysis of bacteria.

The application discloses a kind of for pyrolysis gas hydrogen sulfide detection SmFeO3-based gas sensitive material and its preparation method and application, it is related to gas sensitive material technical field.The application uses Sm (NO3) 3·6H2O, Fe (NO3) 3·9H2O, PtCl4, PdCl2 as raw material, by hydrothermal method preparation for pyrolysis gas hydrogen sulfide detection SmFeO3-based gas sensitive material.The application uses Pt and Pd and so on noble metal to SmFeO3 material is doped.By the doping of two kinds of elements, not only can SmFeO3-based gas sensitive material in high humidity environment to pyrolysis gas H2S gas maintains high sensitivity, also reduce the working temperature of SmFeO3-based gas sensitive material, improve temperature stability.Specifically, the SmFeO3-based gas sensitive material for pyrolysis gas hydrogen sulfide detection prepared in the application, when relative humidity is less than 60%, response value change rate is less than 10%.

The invention discloses a hydrogen sulfide on-site rapid detection method, and belongs to the technical field of hydrogen sulfide gas detection. The method disclosed by the invention comprises the following steps: preparing a cadmium telluride solution with known concentration, wherein the cadmium telluride solution shows red fluorescence; after the carbon quantum dots are mixed with a blue carbon quantum dot solution, to-be-detected gas containing hydrogen sulfide is added for reaction, the color of fluorescence can change along with the change of the content of hydrogen sulfide, and based on the principle, the color change can be recorded by adopting a photographing technology, so that the content of hydrogen sulfide is obtained. According to the detection method disclosed by the invention, the reaction of the gas to be detected and the mixed solution can be realized through the detection device with a simple structure, so that on-site rapid detection is realized. The method disclosed by the invention has the advantages of simplicity in operation, low cost, high sensitivity and high safety performance, and can be suitable for various hydrogen sulfide detection environments.

The utility model provides a kind of portable waste gas hydrogen sulfide detection probe, it includes filter mechanism, it includes: docking sleeve, processing box being arranged at the bottom of the docking sleeve, filter plate being arranged in the processing box, aperture being arranged at the bottom of the filter plate, filter membrane being arranged in the processing box, activated carbon layer being arranged at the top of the filter membrane, limiting rod being arranged at the top of the activated carbon layer, and detection test paper being arranged at the top of the limiting rod;The utility model is when using, external waste gas enters processing box interior through the aperture at the bottom of filter plate inside processing box, and filter membrane and activated carbon layer in processing box interior carry out filtration to particulate matter and oily substance in waste gas, guarantee the accuracy of hydrogen sulfide detection, while after service life ends, the docking sleeve at the top of processing box is twisted off from the bottom of detection main body and replaced, and it is fast.

Provided is a hydrogen sulfide detection device capable of detecting the generation of hydrogen sulfide with high accuracy. This hydrogen sulfide detection device is provided with: wiring that electrically connects a first node and a second node; and a monitoring circuit that monitors a voltage between the first node and the second node. The wiring includes a pattern formed on the substrate and formed of a metal that is corroded by a reaction with hydrogen sulfide, and the pattern includes at least one through hole. The surface of the substrate has a recess, and the at least one through hole is exposed to the outside of the substrate through the recess.

The invention relates to the field of natural gas detection, and provides a method and device for detecting the concentration of hydrogen sulfide in natural gas, and the detection device comprises a detection tube, a direct-current power supply, a current detector and a flow detector; a detection tube is filled with a hydrogen sulfide detection indicator, and two ends of the detection tube are connected with a direct-current power supply and a current detector; introducing a preset mass of hydrogen sulfide-containing natural gas with known concentration into the detection tube to carry out color change reaction with the hydrogen sulfide detection indicator, and when the length of the color change reaction reaches a preset length, recording the reading variable quantity delta A of the current detector; then the natural gas to be detected is introduced into the other detection pipe, when the reading of the current detector changes delta A, the volume of the introduced natural gas to be detected is determined according to the flow detector, and finally the hydrogen sulfide concentration in the natural gas to be detected is calculated according to the preset mass and the volume of the natural gas to be detected. The problems of large error, low efficiency and poor repeatability in detection result reading of a natural gas hydrogen sulfide concentration detection device in the prior art are solved.

A hydrogen sulfide capture device comprises a substrate with a pattern formed from a metal that reacts with hydrogen sulfide, causing it to corrode. The pattern includes a capture section that captures the hydrogen sulfide produced by the corrosion of the metal exposed on a surface of the substrate. The capture section is covered with a filter designed to allow the passage of hydrogen sulfide gas while blocking the passage of particles generated from the corroded metal.

The utility model relates to the technical field of hydrogen sulfide pipeline sealing devices, in particular to a hydrogen sulfide pipeline sealing device which comprises an air inlet pipe, an air guide pipe, a stop valve, a connecting pipe, a self-operated pressure reducing valve, a nitrogen pipe, a connecting line, a controller, a hydrogen sulfide detection probe, an air pump and a sulfur production air blower fixedly installed on the air inlet pipe. The end of the air guide pipe extends into the air inlet pipe and is fixedly connected with the air inlet pipe, a three-way hole is formed in the end of the air guide pipe, the stop valve is fixedly installed at the exhaust end of the air guide pipe, the connecting pipe is fixedly installed at the air inlet end of the stop valve, and the self-operated pressure reducing valve is fixedly installed at the end of the connecting pipe. The nitrogen pipe is fixedly installed at the gas inlet end of the self-operated pressure reducing valve, the gas pump is fixedly installed at the end of the nitrogen pipe, and the hydrogen sulfide detection probe is fixedly installed in the gas inlet pipe. According to the device disclosed by the utility model, the self-operated pressure reducing valve is used for setting nitrogen to normal operation pressure of the sulfur production blower and introducing the nitrogen into the gas inlet pipe to form a positive pressure barrier, so that hydrogen sulfide is prevented from leaking through nitrogen sealing.

The utility model discloses a continuous flow analysis system for hydrogen sulfide in air in a workplace, and relates to the technical field of hydrogen sulfide analysis. The continuous flow analysis system for the hydrogen sulfide in the air of the workplace comprises a gas-liquid driving module, a chemical reaction module, an optical detection module and an analysis module. The driving module comprises a sample injector, a sampling needle, a peristaltic pump and a plurality of conveying pipes; the sample injector is connected with the peristaltic pump through the sampling needle, and the delivery pump is connected with the reaction module; a gas injector, an on-line mixer, a three-way joint and an on-line waste gas discharger are arranged in the reaction module; the detection module is used for measuring the absorption of light with specific wavelength by the colored compound on the basis of a light absorption principle and converting a light signal into an electric signal; the analysis module receives the electric signal and processes data to calculate the hydrogen sulfide content. The utility model aims to realize efficient and accurate hydrogen sulfide detection.

The present invention relates to the technical field of hydrogen sulfide detection, and discloses a hydrogen sulfide production detection apparatus, which comprises: a detector main body, the connection end of the detector main body is provided with a zero residue gas exchange mechanism, and the zero residue gas exchange mechanism is used for removing residual gas after each detection; the zero-residue gas exchange mechanism comprises: a detection chamber, the top in which is provided with a detection head, the bottom is provided with an L-shaped negative pressure suction pipe, one end of the negative pressure suction pipe is communicated with the detection chamber, and the other end extends to a hydrogen sulfide gas flow path; the calibration expansion seat is arranged in the detection chamber, is positioned under the detection head and is connected with air supply equipment outside the detector main body; according to the invention, a zero-residue gas exchange mechanism is arranged, especially a two-stage expansion mechanism of a calibration expansion seat is adopted, so that the residual gas in the detection chamber is thoroughly removed, the first-stage vertical expansion is tightly attached to the detection head, the purity of the calibration process is ensured, and the interference of external gas is avoided.