14 results about "Ph buffering" patented technology

[Problem] To provide a base material and a method for adsorbing and immobilizing carbon dioxide using a base material that make it possible to semi-permanently adsorb and immobilize carbon dioxide in a base material in soil without using heat energy at all and solely by natural forces. [Solution] Provided is a base material 10 which is buried in soil and is used as a filler or a backfilling material for suppressing clogging. The base material 10 comprises: a hard aggregate body 20; a wet coating layer 30 which covers the surface of the aggregate body 20 and is composed of a naturally derived wetting substance 31 and an adhesion auxiliary material 32, the wetting substance 31 having an acidic functional group having at least a function of adsorbing and immobilizing carbon dioxide, a function of capturing an SS material, and a pH buffering action, and the adhesion auxiliary material 32 exhibiting viscosity when wetted and adhering the wetting substance 31 to the surface of the aggregate body 20; and a regenerated fine powder 33 of concrete that is a carbon dioxide carrier adhered to the surface of the aggregate body 20 or the wet coating layer 30.

The invention belongs to the technical field of coal mine machinery lubrication and hydraulic transmission, and discloses an environment-friendly total-synthesis concentrated solution for a hydraulic support and a preparation method of the concentrated solution. The biological sensing microcapsule corrosion inhibitor is characterized by comprising 0.5%-3.0% of a biological sensing microcapsule, 8.0%-15.0% of a main corrosion inhibitor, 2.0%-6.0% of an auxiliary corrosion inhibitor, 4.0%-10.0% of a water-soluble lubricant, 0.05%-0.2% of an anti-foaming agent, 1.0%-3.0% of a pH buffering agent and deionized water. Wherein the biological sensing microcapsule has a core-shell-shell structure, is integrated with electroactive microorganisms, an electron mediator carrier and a corrosion inhibition precursor release layer, and can trigger targeted release of benzotriazole derivatives when the pH value of a local corrosion microarea is less than or equal to 5.5. The corrosion inhibitor has excellent corrosion protection performance and environment-friendly characteristics, effectively overcomes the problem of inactivation of microorganisms under severe hydraulic working conditions through a microcapsule encapsulation strategy, realizes accurate matching of corrosion signal in-situ sensing and corrosion inhibition response, remarkably improves the anti-rust performance under high-shear and wide-temperature-range working conditions, and has wide application prospects. And meanwhile, the requirements of environmental protection and sealing material compatibility are met.

The invention relates to the technical field of freeze-dried powder injections, in particular to a polypeptide conjugate fluorescent developer preparation composition as well as a preparation method and application thereof. The polypeptide conjugate fluorescence imaging agent preparation composition is prepared from the following raw materials: a combination of a polypeptide conjugate fluorescence imaging agent raw material medicine, an excipient and a pH buffering agent, and at least one of a solubilizer and a chelating agent is included or not included. By improving the formula and the process of the freeze-dried powder injection, the problems that a polypeptide conjugate fluorescence imaging agent is insoluble and poor in stability are solved, and the formability, the resolubility and the stability are remarkably improved.

The invention discloses a method for inhibiting leaching of impurity aluminum ions in ionic rare earth ore, and belongs to the technical field of rare earth ore mining. The method comprises the steps that S1, an ore leaching agent is prepared according to the content of rare earth in an ore body; s2, a buffering agent is added into the mixture obtained in the step S1, and a composite ore leaching agent is prepared; s3, the composite ore leaching agent in the step S2 is added into an ore body for ore leaching; s4, preparing a buffer solution with the same pH buffer capacity as the composite ore leaching agent by using the buffer agent in the step S2; s5, after the composite ore leaching agent in the step S2 is completely added, the buffer solution in the step S4 is continuously added into the ore body until ore leaching is completed; according to the method, the composite ore leaching agent containing the specific buffering agent is prepared, and the pH value of leaching liquid in the ore leaching process is stably controlled within the range of 4.8-5.4; under the pH condition, the aluminum ions can form aluminum hydroxide precipitate colloid and are adsorbed in the ore body, and the rare earth ions still can stably exist in the leaching solution, so that the in-situ separation of the rare earth and the aluminum ions in the ore leaching stage is realized.

The utility model discloses equipment for preparing hypochlorous acid based on an ion exchange method, which relates to the technical field of hypochlorous acid preparation equipment and comprises a water inlet part, and the liquid inlet end of the water inlet part is connected with an external water supply pipeline; the liquid inlet end of the liquid injection part is connected with the water inlet part; the liquid inlet end of the ion exchange part is connected with the liquid injection part, and the liquid outlet end of the ion exchange part is connected with the hypochlorous acid using terminal through an external liquid conveying pipeline; the pipe diameter of the use terminal is greater than or equal to that of the liquid injection part; the controller is electrically connected with electrical elements in the water inlet part and the liquid injection part; according to the device, high-concentration hypochlorous acid can be prepared, the liquid outlet amount is large, and the weakly acidic cation exchange inner core has a good pH buffering function, so that the potential safety hazard of chlorine overflow does not exist.

The application discloses a method for inhibiting leaching of impurity aluminum ions in ionic rare earth ore, and belongs to the technical field of rare earth ore mining. S1, according to the rare earth content in the ore body, a leaching agent is configured; S2, a buffer is added to the step S1 to configure a composite leaching agent; S3, the composite leaching agent in the step S2 is added to the ore body for leaching; S4, the buffer in the step S2 is configured into a buffer solution with the same pH buffering capacity as the composite leaching agent; S5, after the composite leaching agent in the step S2 is added completely, the buffer solution in the step S4 is continuously added to the ore body until the leaching is completed; the composite leaching agent containing a specific buffer is configured, the pH value of the leaching solution in the leaching process is stably controlled within the range from 4.8 to 5.4; under the pH condition, aluminum ions can form aluminum hydroxide precipitate colloid and are adsorbed in the ore body, while rare earth ions can still stably exist in the leaching solution, so that in-situ separation of the rare earth and the aluminum ions in the leaching stage is realized.

The invention discloses a time and temperature indicator based on ferrous-tannic acid and application of the time and temperature indicator in food freshness monitoring, the time and temperature indicator (TTI) comprises a body and a time and temperature indicator body arranged in the body, the time and temperature indicator body comprises a pH buffering agent, ferrite and tannic acid, the molar ratio of the ferrite to the tannic acid is (2-8): (1-5), and the pH of the pH buffering agent is 1-7. The method can be widely matched with the decay kinetics of different food systems, and breaks through the key bottleneck that the applicability of the traditional TTI is limited.

The present application relates to the technical field of agricultural product quality and safety detection and element form analysis, and particularly relates to an LC-ICP-MS / MS method for detecting selenocysteine. The present application provides an LC-ICP-MS / MS method for detecting selenocysteine, wherein the sample to be detected is mixed with iodine acetamide solution and buffer extraction solution for enzymolysis to obtain an enzymolysis solution; the final concentration of iodine acetamide in the mixed solution is 0.02-0.10 mmol / L; the purified solution is injected into a liquid chromatography system for high performance liquid chromatography separation, a solution without ion pair reagent, with pH buffering capacity and excellent ICP-MS compatibility is used as a mobile phase, and an anion exchange chromatographic column is used as a chromatographic column; the chromatographic effluent is introduced into ICP-MS / MS for detection, CH4 is used as a reaction gas, a detection method with a recovery rate of greater than or equal to 90% and no residual interference is constructed, and a new paradigm is provided for the accurate analysis of unstable selenium forms.

To provide a base material and a method for adsorbing and fixing carbon dioxide using the base material which can semi-permanently adsorb and fix carbon dioxide onto the base material in the soil without using any thermal energy at all and solely through natural forces.SOLUTION: A base material 10 buried in the soil and used as a filler or backfill material to prevent clogging, the base material comprising a hard aggregate body 20, a wet coating layer 30 that coats the surface of the aggregate body 20 and is configured by a naturally derived wetting substance 31 having a function of adsorbing and fixing carbon dioxide, a function of capturing SS substances and an acidic functional group having at least a pH buffering action, and an adhesion promoting agent 32 exhibiting viscosity when wet and causing the wetting substance 31 to adhere to the surface of the aggregate body 20, and recycled concrete fine powder 33 that is adhered to the surface of the aggregate body 20 or the wet coating layer 30 and is a carrier for carbon dioxide.SELECTED DRAWING: Figure 4

In an embodiment of the present invention, there is provided a reagent layer comprising a polymer containing a proton accepting group in a repeating unit and having a pH buffering ability, and an oxidoreductase that oxidizes or dehydrogenates an analyte.

The invention discloses a screw with a corrosion-resistant film layer and a preparation method of the screw. The screw with the corrosion-resistant film layer comprises an iron-based screw body and the corrosion-resistant film layer wrapping the surface of the iron-based screw body. The corrosion-resistant film layer is prepared from the following components in percentage by weight: 8 to 15 percent of phytic acid-copper complex, 5 to 12 percent of molybdate radical intercalation corrosion inhibitor, 3 to 7 percent of chestnut tannin, 0.5 to 1 percent of silane coupling agent, 0.2 to 0.5 percent of tea saponin, 2 to 5 percent of pH buffering agent, 0.5 to 1 percent of sodium polyacrylate, 1.5 to 3.5 percent of nano SiO2 dispersion liquid and the balance of water. And the corrosion-resistant film layer improves the corrosion resistance of the screw rod, and is good in film-forming property and high in adhesive force.

The invention discloses a polyanion gel electrolyte, a preparation method thereof and a zinc battery, and the preparation method comprises the following steps: S1, dissolving a nonionic hydrophilic monomer and a zinc salt in water, and uniformly dispersing to obtain a solution A; s2, adding a sulfonic group-containing monomer into the solution A, and uniformly dispersing to obtain a solution B; s3, respectively adding a pH buffer agent and a catalyst into the solution B, and uniformly dispersing to obtain a solution C; s4, adding an initiator and a cross-linking agent into the solution C, and heating and polymerizing to obtain a polyanion gel electrolyte with a pH buffering function; and the pH buffering agent adopts choline glycerophosphate. The polyanion gel electrolyte can synchronously buffer the pH fluctuation of a zinc electrode interface, maintain a stable electrochemical environment, effectively regulate and control the content of free water, reduce side reactions, induce uniform deposition of zinc ions and strongly inhibit dendritic crystal growth and corrosion reaction.

Provided is a treatment liquid for treating a semiconductor wafer in a semiconductor forming process, the treatment liquid containing (A) a hypobromite ion, (B) a pH buffer, and (C) an onium ion represented by formula (1):(wherein R1, R2, R3, and R4 each independently denote an alkyl group having carbon number from 1 to 25,)

The invention relates to the technical field of safe disposal of dangerous solid wastes, in particular to a method for stabilizing beryllium-containing waste residues by using a pH buffer mechanism, which comprises the following steps: using minerals with a pH alkaline buffer effect or a mixture of minerals and solid wastes as a blocky pH alkaline buffer agent raw material; crushing and grinding the blocky pH alkaline buffering agent raw material, then carrying out screening and grading treatment, and selecting particles with the particle size of less than or equal to 1mm as the pH alkaline buffering agent; the method comprises the following steps: uniformly mixing a pH alkaline buffer agent with beryllium-containing waste residues according to a weight ratio of 1: 5-50: 1 to obtain a mixture capable of fixing soluble beryllium ions in the beryllium-containing waste residues into Be (OH) 2 beryllium indissolvable substances after meeting water; and the mixture is subjected to landfill. The method solves the problems of high energy consumption, high secondary pollution risk and insufficient long-term stability in the existing beryllium-containing waste residue harmless treatment technology.