67 results about "Hydrogen sulfide test" patented technology

The invention discloses a method for preparing an electrochemical luminescence paper chip and a method for measuring content of signal molecule hydrogen sulfide in MCF-7 by using an electrochemical luminescence sensor. The method is characterized by preparing a hydrophobic region, a semi-hydrophobic region, a hydrophilic region and a hollow channel on paper by utilizing a wax printing technology, cutting the hollow channel by virtue of a laser cutting machine, preparing proper printing ink, printing a corresponding reference electrode and a working electrode on the paper, functionalizing the working area, dripping stock solution in a pretreatment region, and fixing cancer cells; and folding the prepared paper chip, forming a three-electrode system, dropwise adding electrolyte solution in a reaction region, connecting an electrochemical workstation, thus realizing high-sensitivity detection of the low-content signal molecules in the cancer cells.

The invention relates to a method of removing hydrogen sulfide. The method includes dissolving 0.001-0.010 g of a polyoxometallate adopted as a wet-method desulfurizer into 10-180 mL of distilled water, and feeding a gas mixture containing the hydrogen sulfide into the solution at 10-65 DEG C and under atmospheric pressure to remove the hydrogen sulfide. The structure formula of the polyoxometallate is Cu3(L)6[H3(PMo12O40)2]-nH2O or Cu3(L)6[H5(SiW12O40)2]-nH2O, wherein the L is C8H10N4. The desulfurizer adopted by the method is simple in preparation method, high in oxidation performance, high in stability and free of pollution to pipelines and the environment, and is environmental-friendly. The hydrogen sulfide removing efficiency in the whole process is high and elemental sulfur can be obtained. Process equipment is simple and low in investment.

The invention discloses near-infrared fluorescent dye THX-Np capable of achieving mitochondrial localization and a preparation method and application of the near-infrared fluorescent dye THX-Np. The structural formula of the dye is shown in (I). The dye has a stable pH fluorescence opening effect in an aqueous phase under the conditions of different pH values, and 2,4-dinitrophenyl ether derivatives prepared by using the dye can be applied to detection of hydrogen sulfide. The invention has the following advantages that the fluorescent dye has pH stability, large Stokes shift, good water solubility, good cell membrane permeability and excellent mitochondrial localization performance, and hydroxyl groups and carboxyl groups of the dye can be easily modified so as to produce tracers relatedto organisms, the 2,4-dinitrophenyl ether derivatives prepared through etherification of hydroxyl groups of the dye have excellent selective recognition of hydrogen sulfide, and an excellent selectivefluorescent probe of hydrogen sulfide detection.

The invention belongs to the field of desulfurization catalyst activity evaluation, and particularly relates to a desulfurization catalyst activity evaluation device and method. The desulfurization catalyst activity evaluation device provided by the invention comprises a gas supply unit, and further comprises a reaction unit which comprises a deoxidation unit, a hydrolysis unit and an adsorption unit which are communicated in sequence, the evaluation device further comprises a detection unit which comprises an oxygen detection unit, an organic sulfur detection unit and a hydrogen sulfide detection unit, the oxygen detection unit is arranged between the deoxidation unit and the hydrolysis unit, the organic sulfur detection unit is arranged between the hydrolysis unit and the adsorption unit, the hydrogen sulfide detection unit is connected with a gas outlet of the adsorption unit, and the gas supply unit is connected with a gas inlet of the deoxidation unit. According to the invention,the performance of several groups of different catalysts suitable for blast furnace gas desulfurization series can be tested at the same time through one-time gas distribution, and the performance iscloser to the real use condition of the catalyst.

The invention relates to a method for absorbing hydrogen sulfide tail gas in a sulfide precipitation system. The method comprises the steps that metal mine acidic wastewater generated by a metal minein a mining and smelting process enters the sulfide precipitation system, then metal sulfide is generated, and valuable metal is recovered; the hydrogen sulfide tail gas generated in the sulfide precipitation system is uniformly concentrated to a spray absorption device, a part of the metal mine acidic wastewater is drained to the spray absorption device to perform spraying on the hydrogen sulfidetail gas, so that metal ions in the metal mine acidic wastewater react with the hydrogen sulfide gas according to a chemical reaction formula shown in the description, wastewater mixed with the metalsulfide and up-to-standard gas are obtained, and the up-to-standard gas is discharged. The method for absorbing the hydrogen sulfide tail gas in the sulfide precipitation system has the advantages that no drug or special system or equipment is needed, no new harmful impurities are introduced, no addition of environmental protection investment is needed, the metal mine acidic wastewater is used for treating the hydrogen sulfide gas, the purified gas is discharged after reaching the standard, the process is simple and practical, the treatment cost is low, the absorption effect is obvious, and the method is especially applied to metal mines and hydrometallurgical industries.

Treatment of hydrocarbon streams, e.g. gasoline, with basic ionic liquids (ILs), results in reduction of the sulfur compounds such as H₂S thiophenes, disulfides, thioethers, and/or mercaptans that are present to remove these compounds. The IL is a quaternary ammonium compound having the formula R₄N⁺ X⁻ or X⁻ R₃N⁺R′N⁺R₃ X⁻, where R is independently an alkyl group, an alkylbenzyl group, a hydroxyalkyl group, or a hydroxyalkylbenzyl group, and R is straight or branched and has 1-22 carbon atoms, R′ is a straight or branched alkylene or oxyalkylene having 1 to 10 carbon atoms, and where X⁻ can be hydroxide, carbonate, alkylcarbonate, bicarbonate or alkoxide, where the alkyl group of the alkylcarbonate or alkoxide, if present, is straight or branched and has 1 to 8 carbon atoms. The ILs can be used in applications where liquid or gaseous hydrocarbon fluids are treated by direct injection or by extraction.

Carbon dioxide and/or hydrogen sulfide sampling and detection system and method for determination of the content of gaseous CO2 and/or H2S in aqueous liquids, and/or for the fast and reliable detection of the free CO2 gas, HCO3- and/or total carbonate and/or H2S content in aqueous liquids. Said detection system comprises a membrane block having a liquid sample inlet port and a sample outlet port between which a sample flow path extends. Said membrane block comprises a first membrane unit having a sample flow on the first side of a first permeable membrane element and a carrier gas flow on thesecond side of the first permeable membrane element. Said membrane block further comprises a second membrane unit having a sample flow on the first side of a second permeable membrane element and a carrier gas flow on the second side of the second permeable membrane element. Said first and second membrane units are arranged in series in the liquid sample flow path. The gas flow path is a closed loop that includes gas circulation means, the second gas containing side of the first and second membrane units. The system further comprises a carbon dioxide gas sensor and/or a hydrogen sulfide detection unit, which are arranged in the closed gas circulation loop.

The invention relates to a trace hydrogen sulfide detection reagent and a preparation method thereof, belonging to the field of detection reagents. The trace hydrogen sulfide detection reagent is prepared from the following raw materials in parts by weight: 14-26 parts of copper sulfate pentahydrate, 10-18 parts of butyl acetate, 1-5 parts of zinc sulfate, 4-12 parts of sulfamic acid, 8-24 parts of sodium citrate, 5-12 parts of calcium sorbate, 3-12 parts of citric acid, 3-10 parts of dodecyl alcohol and 32-42 parts of water. The trace hydrogen sulfide detection reagent has a reasonable formula, is extremely sensitive to the detection of hydrogen sulfide, and can be used for detecting trace hydrogen sulfide; and the lowest detection amount of hydrogen sulfide can be 0.01mg/L, the detection time is short and the detection efficiency is high.

The invention discloses a hydrogen sulfide detection method based on colorimetric analysis and application. The method comprises the following steps: preparing ferroferric oxide; preparing magnetic bead-carboxyl; activating the magnetic bead-carboxyl to prepare an MB/PAMAM/MnO2 composite material; preparing a NaAcHAc buffer solution and TMB (tetramethylbenzidine); optimizing detection conditions;taking a sodium sulfide solution, adding a NaAc-HAc buffer solution, MB/PAMAM/MnO2 and TMB, carrying out colorimetric detection, and determining the absorbance. According to the hydrogen sulfide detection method based on colorimetric analysis and the application of the hydrogen sulfide detection method, the MB/PAMAM/MnO2 material has relatively strong catalytic performance, high sensitivity to H2Sdetection, strong universality, flexible operation, simple and convenient detection method and high economic benefit, and has important practical significance and development prospect in trace biological small molecule analysis; a simple, low-cost, rapid, high-sensitivity and stable-performance novel detection method is provided for clinical biomolecular detection.

The embodiment of the invention discloses a manufacturing method of a gas sensor, a surface acoustic wave micro-centrifugal device and the gas sensor. The manufacturing method of the gas sensor comprises the following steps: providing a surface acoustic wave micro-centrifugal device, the surface acoustic wave micro-centrifugal device comprises a micro reaction tank, and the micro reaction tank comprises a solution containing a plurality of layers of MXene materials; stripping the multi-layer MXene material, and obtaining a single-layer MXene material; providing a semiconductor gas sensing assembly, and reversely buckling a finger strip sensitive area of the semiconductor gas sensing assembly on the micro reaction tank; and coating the single-layer MXene material on the finger strip sensitive area of the semiconductor gas sensing assembly by using an acoustic flow spin-coating method to obtain the gas sensor. The gas sensor manufactured by the scheme can effectively improve the sensitivity of hydrogen sulfide detection.

Disclosed are a process device and a process method of liquid phase reaction desulfurization of sulfur dioxide and hydrogen sulfide. The process device includes a reactor and a separator. The reactorincludes a tail gas absorption zone, a liquid holding tank zone and a reaction zone. The liquid holding tank zone includes a separating plate, multiple gas lifting cylinders and a liquid down pipe andcommunicates with the tail gas absorption zone and the reaction zone. The lower part of the reaction zone is provided with at least two nozzles which are symmetrically distributed. The nozzles are obliquely fixed to the device wall of the reaction zone, and nozzle heads extends obliquely upward to the inside of the reaction zone. A liquid collection tank is arranged on the upper part of the reaction zone. A liquid phase extraction pipe is arranged at the bottom of the liquid collection tank and communicates the liquid collection tank and the separator. The other end of the separator is connected to the top of the tail gas absorption zone. Reaction gas is injected into the reactor through the nozzles to be violently mixing with a reaction solution in the reactor by using the process deviceof the invention, which greatly increases the dissolution rate and reaction rate of the gas in the reaction solution. The gas ejected from two symmetrical nozzles reacts in the reaction solution to generate sulfur, and the continuously injected gas pushes the reaction solution entrained with the sulfur to flow obliquely upward into the liquid collection tank. The solution in the reactor is alwaysin a flowing state so as to prevent the sulfur from depositing and scaling on the device wall and the bottom of the reactor to ensure safe, stable and long-term operation of the device.

The invention provides an integrated process for detecting and treating toxic gas in crude oil produced in an oil field. The integrated process comprises the following steps: carrying out gas-liquid separation on crude oil produced in an oil field; cooling and depressurizing the gas obtained by gas-liquid separation, and then drying; sequentially carrying out radon, hydrogen sulfide and mercury detection on the dried gas; if it is found that the concentrations of mercury, radon and hydrogen sulfide in the dried gas all reach the standard after detection, conveying the dried gas to a gas conveying pipeline; if it is found that the concentration of radon and hydrogen sulfide or mercury in the dried gas does not reach the standard after detection, carrying out harmless treatment on the radon and hydrogen sulfide or mercury which do not reach the standard in the gas; sequentially carrying out mercury, radon and hydrogen sulfide detection on the gas subjected to harmless treatment, and if the concentrations of mercury, radon and hydrogen sulfide in the gas all reach the standard, conveying the gas subjected to harmless treatment to a gas conveying pipeline; and if the concentration of radon and hydrogen sulfide or mercury in the gas does not reach the standard, continuously performing harmless treatment on the radon and hydrogen sulfide or mercury which do not reach the standard in the gas until the concentration reaches the standard.

The invention provides an integrated system and process for detecting and treating toxic gas in a drilled core of an oil field. The process comprises steps of carrying out wax sealing of the core taken out from a shaft, placing the wax-sealed core in a vacuum container, and collecting the gas escaping from the core through a vacuum gas collection tank; sequentially carrying out radon, hydrogen sulfide and mercury detection on the gas in the rock core; if it is found that the concentrations of mercury, radon and hydrogen sulfide in the gas all reach the standard after detection, the gas being conveyed to a gas conveying pipeline; if it is found that the concentration of radon and hydrogen sulfide or mercury in the gas does not reach the standard after detection, harmless treatment being conducted on the radon and hydrogen sulfide or mercury which do not reach the standard in the gas; mercury, radon and hydrogen sulfide detection being sequentially carried out on the gas subjected to harmless treatment, and if the concentrations of mercury, radon and hydrogen sulfide in the gas all reach the standard, the gas subjected to harmless treatment being conveyed to a gas conveying pipeline; and if the concentration of radon and hydrogen sulfide or mercury in the gas does not reach the standard, continuously performing harmless treatment on the radon and hydrogen sulfide or mercury which do not reach the standard in the gas till the concentration reaches the standard.

The invention discloses a reaction kettle mechanism with a function of quickly calculating theoretical replenishing quantity of a hydrogenated vulcanizing agent. The reaction kettle mechanism comprises a kettle body, supporting legs are fixedly connected to four bottom corners of the kettle body, a motor is fixedly connected to the top of the kettle body, the bottom of a rotating shaft of the motor penetrates an inner cavity of the kettle body to fixedly connect with a vertical rod, and stirring blades are fixedly connected to two sides of the vertical rods respectively. By cooperation of thekettle body, the supporting legs, the motor, the vertical rod, the stirring blades, vertical pipes, first manual valves, measuring cups, seal covers, a liquid outlet pipe, a second manual valve, a transverse pipe, a high-pressure vulcanizing agent tank, a flow valve and an electric control box, the additive content can be measured in advance to achieve an accurate content value, the added hydrogencatalyst content can be detected, corresponding values can be added, an optimal reaction proportion is calculated, in-process control test frequency in a practical production process can be reduced,work intensity of personnel is relieved, and consumption of hydrogen sulfide test kits is reduced.

A sensing material for detecting hydrogen sulfide capable of detecting hydrogen sulfide even having a low concentration, a hydrogen sulfide-sensitive layer containing the sensing material for detecting hydrogen sulfide, and a metal oxide semiconductor-type gas sensor having the hydrogen sulfide-sensitive layer are provided. The sensing material for detecting hydrogen sulfide includes CuFe₂O₄-type complex oxide (W). The CuFe₂O₄-type complex oxide (W) contains, as a main component (W1), 35.0 to 49.5 mol % of iron oxide in terms of Fe₂O₃ and 50.5 to 65 mol % of copper oxide in terms of CuO, and an average particle diameter of particles is 3 μm or less.

The invention relates to an intelligent fireproof door with a monitoring function. The intelligent fireproof door comprises a fireproof door body, an SF6 gas detector, a hydrogen sulfide detection sensor, a carbon monoxide sensor and a combustible gas sensor, wherein the fireproof door body is arranged on a monitoring area and used for sealing the monitoring area, and the SF6 gas detector, the hydrogen sulfide detection sensor, the carbon monoxide sensor and the combustible gas sensor are arranged on the fireproof door body. An opening and closing device used for controlling the fireproof door body to be opened or closed is arranged on the fireproof door body, and the opening and closing device is electrically connected with the SF6 gas detector and the sensor. When any one of SF6 gas, hydrogen sulfide, carbon monoxide, combustible gas, oxygen content, temperature and humidity in the monitoring area is unqualified, the controller controls the opening and closing device to be closed, the fan is started to exhaust air, and meanwhile the controller starts the audible and visual alarm to give an alarm. When a certain content in the equipment room is detected to be unqualified, the fireproof door is automatically locked, field operation personnel cannot enter the equipment room, and accidents are prevented.

A gas analysis system with an FTIR spectrometer preferably utilizes a long path gas cell, a narrow band detector, and an optical filter that narrows the detection region to measure hydrogen sulfide.

The invention provides a method for visually detecting hydrogen sulfide by naked eyes, and relates to the technical field of industry, environment, medical treatment and life safety detection. The method mainly comprises the following steps: mixing a buffer solution containing 10 to 40 mM of HEPES, 200 to 400 mM of NaCl, 50 to 100 mM of KCl, 0.5 to 2 [mu] M of AgNO3, 10 to 100 mM of rhodamine B, 1 [mu] M of DNA1 and 1 [mu] M of DNA2, and adding 5 [mu] L of H2S of 0 to 500 [mu] M into the solution; after the reaction, adding 3 [mu] L of Triton-X-100 and 3 [mu] L of Hemin, and carrying out a reaction for 15 to 30 min; and after the reaction, adding 10 [mu] L of a solution containing 10-40 mM of HEPES buffer solution, 2 mM of H2O2 and 1.5 mM of ABTS until the total volume is 50 [mu] L, recording the absorption value of the solution at 418 nm in 1-30 min by using a microplate reader, and photographing to record the color change condition of the solution. According to the method, RGB channels are used for color conversion, differences caused by subjective factors are avoided, the method has the characteristics of rapidness, convenience and naked eye visibility, on-site rapid detection of hydrogen sulfide is expected to be realized, and convenience is brought to hydrogen sulfide detection in industry, environment, medical treatment and life.