496 results about "Ethylene diamine" patented technology

Shallow Trench Isolation (STI) chemical mechanical planarization (CMP) polishing compositions, methods and systems of use therefore are provided. The CMP polishing composition comprises abrasives of ceria coated inorganic oxide particles, such as ceria-coated silica; and dual chemical additives for providing the tunable oxide film removal rates and tunable SiN film removal rates; low oxide trench dishing, and high oxide: SiN selectivity. Dual chemical additives comprise at least one silicone-containing compound comprising at least one of (1) ethylene oxide and propylene oxide (EO-PO) group, and at least one of substituted ethylene diamine group on the same molecule; and (2) at least one non-ionic organic molecule having at least two, preferably at least four hydroxyl functional groups.

The invention discloses a method for preparing calcium hydroxide slurry with high specific surface area and high pore volume, which comprises the following steps: S1, adding an alcohol reagent into water to obtain a solution A; s2, adding an inorganic salt solution into the solution A, and uniformly mixing to obtain a solution B; s3, a reagent X is added into the solution B, ultrasonic mixing is performed to obtain a solution C, and the reagent X is a mixture of phenol or triethanolamine, ethidene diamine and ethylamine; and S4, adding calcium oxide powder into the solution C, continuously stirring, and reacting to obtain calcium hydroxide slurry. The invention provides a method for preparing calcium hydroxide slurry with high specific surface area and high pore volume, the calcium hydroxide slurry prepared by the method can form calcium hydroxide with high specific surface area and high pore volume when in use, and the method aims to solve the problems of low specific surface area and low pore volume of the existing calcium hydroxide. Therefore, the problem of desulfurization performance inactivation caused by blockage of calcium hydroxide (desulfurizer) pores by generated CaSO3 and CaSO4 in the desulfurization process is avoided.

The invention discloses a blood genome DNA extraction kit and an extraction method, and belongs to the technical field of nucleic acid extraction. The DNA extraction kit comprises a lysis solution, a first rinsing solution, a second rinsing solution and an eluent, wherein the lysate is prepared from the following components: 5.5 to 6 M of guanidine hydrochloride, 0.2 to 0.3 M of NaCl, 0.01 to 0.015 M of EDTA (Ethylene Diamine Tetraacetic Acid), 0.01 to 0.015 M of glucan, Triton X-100 with the volume concentration of 1.5 to 2 percent, 0.06 to 0.1 M of dithiothreitol, Tween-20 with the volume concentration of 5 to 10 percent and 10 to 50 mM of trehalose. The components of the lysate in the kit are optimized, through the synergistic effect of the components, the cell lysis efficiency is remarkably improved, meanwhile, DNA molecules higher in purity, more complete in structure and higher in extraction yield can be obtained, and therefore the kit has good application prospects.

The invention provides a method for preparing high-purity vanadium pentoxide from carbonation leachate. The method comprises the following steps: S1) carrying out silicon removal on the carbonation leachate, and carrying out solid-liquid separation to obtain silicon-removed slag and silicon-removed liquid; s2) mixing the post-silicon-removal liquid with a complexing agent, and reacting to obtain a post-reaction liquid; s3) carrying out vanadium precipitation on the reacted liquid to obtain ammonium metavanadate and vanadium precipitation wastewater; s4) oxidizing and calcining the ammonium metavanadate to obtain high-purity vanadium pentoxide; the complexing agent is selected from one or more of ethylene diamine tetraacetic acid, disodium ethylene diamine tetraacetate and tetrasodium ethylene diamine tetraacetate. According to the method, the leaching solution obtained through the vanadium slag low-calcium roasting-carbonation leaching vanadium extraction technology serves as the raw material, ions such as iron, calcium and magnesium are controlled to enter the vanadium product through complexing, high-purity vanadium pentoxide with the low impurity content is obtained, the technological process is simple, implementation is easy, the cost is low, and the method is one of the methods for preparing high-purity vanadium pentoxide through the carbonation leaching solution.

The invention relates to the technical field of cosmetics, in particular to shower gel with deep cleaning and efficient whitening effects and a preparation method of the shower gel. Shower gel with deep cleaning and efficient whitening effects is prepared from the following raw materials in parts by mass: 0.08 to 0.12 part of disodium ethylene diamine tetraacetate, 0.2 to 0.3 part of a whitening plant extract, 8 to 10 parts of a cleaning agent, 0.2 to 0.25 part of a whitening and freckle removing agent, 0.2 to 0.3 part of a preservative, 0.3 to 0.4 part of a bacteriostatic agent, 0.4 to 0.6 part of pearly slurry, 1.4 to 1.6 parts of sodium chloride, 0.2 to 0.3 part of essence and 83 to 85 parts of deionized water. The shower gel formula provided by the invention not only can provide a deep cleaning effect, but also can effectively whiten the skin, has multiple effects of bacteriostasis, mildness, oxidation resistance, inflammation resistance, skin metabolism promotion and the like, and brings comprehensive skin care experience to a user.

The invention relates to the technical field of chemical preparations, in particular to a sodium hypochlorite stabilizer, a preparation method and a use method thereof and a stable sodium hypochlorite solution. The sodium hypochlorite stabilizer is prepared from the following components in percentage by mass: 2.5 to 3.5 percent of sodium diethylenetriamine pentaacetate, 2.5 to 3.5 percent of disodium ethylene diamine tetraacetate, 1.0 to 1.25 percent of sodium silicate, 3.5 to 5.0 percent of sodium bicarbonate, 2.5 to 3.0 percent of sodium chloride and the balance of water. The stable sodium hypochlorite solution prepared by adopting the sodium hypochlorite stabilizer disclosed by the invention is higher in stability and longer in validity period.

The invention discloses a salt-resistant foam scrubbing agent for oilfield exploitation and a preparation method thereof, and belongs to the technical field of foam scrubbing agent preparation. The salt-resistant foam scrubbing agent for oilfield exploitation is prepared from the following components in parts by weight: 15 to 25 parts of a main surfactant, 5 to 10 parts of cocamidopropyl betaine, 0.1 to 0.6 part of a cosurfactant, 1 to 4 parts of EDTA (Ethylene Diamine Tetraacetic Acid) disodium, 0.05 to 0.12 part of nano silicon dioxide and 3 to 6 parts of isopropanol. The foam scrubbing agent prepared by the invention has excellent salt resistance and stability.

The invention provides a separation and purification method of urokinase, and relates to the technical field of separation and extraction. The separation and purification method comprises the following steps: S1, regulating the pH value of male urine to 8.5, standing, and taking supernate; s2, mixing the supernate with an adsorption material, and eluting with an eluent to obtain a urokinase crude product solution; the adsorption material is a core-shell silica gel polymer, Fe3O4atSiO2-NH2 is taken as a core, and polystyrene is taken as a shell; the eluent is a sodium citrate buffer solution with the concentration of 0.5 to 0.15 M, acetonitrile with the concentration of 1 to 5 weight percent and EDTA (Ethylene Diamine Tetraacetic Acid) with the concentration of 0.5 to 1.5 mM; and S3, carrying out anion exchange column chromatography on the urokinase crude product solution, eluting with an eluent, and precipitating to obtain the urokinase. The urokinase prepared by the method has the advantages of high polymer urokinase content, high recovery rate and high activity yield.

The invention relates to modified polyamide particles as well as a preparation method and application thereof, and belongs to the technical field of polyamide particles. The modified polyamide particle comprises the following components: polyamide resin, a modified composite filler, a compatibilizer, an antioxidant and a lubricant. The preparation method comprises the following steps: banburying and mixing the polyamide resin, the compatibilizer, the antioxidant and the lubricant, adding the mixture into a double-screw extruder from a main feeding port, adding the modified composite filler from a side feeding port, and carrying out melt extrusion, cooling and pelletizing to obtain the modified polyamide particles. Zirconium oxide is generated on glass fibers, more silane coupling agents are grafted in combination with a tetramethylammonium hydroxide and ethidene diamine compound catalyst, the interface bonding force between the composite filler and polyamide is increased, the surface of the composite filler is modified through syringaldehyde, the compatibility with a polyamide system is increased, and meanwhile, the composite filler can be used for preparing the composite filler. The modified polyamide particles can react with acid anhydride in a styrene-maleic anhydride copolymer, and the mechanical strength of the modified polyamide particles can be improved.

The invention relates to the technical field of agricultural fertilizers, in particular to a functional sustained and controlled release fertilizer for regulating and controlling productivity of salinized soil and a preparation method thereof. The slow / controlled-release fertilizer is prepared by compounding a fertilizer matrix, a soil conditioner, a water-retaining agent and humic acid, wherein the fertilizer base body comprises a core material, and the surface of the core material is sequentially coated with a chelating layer and a wall material layer from inside to outside; the core material comprises the following components in parts by weight: ammonium sulfate, monoammonium phosphate, potassium sulfate and trace elements; the chelating layer is sodium ethylene diamine tetracetate; and the wall material layer is sodium alginate. The sodium alginate coating material adopted by the fertilizer can control the fertilizer to be slowly released in soil, and after the fertilizer is completely released in the soil, the adopted coated fertilizer is non-toxic and harmless in the soil and is easy to degrade. The chelating layer is arranged between the core material and the wall material and can be chelated to form a connecting structure of the inner layer and the outer layer, so that the strength of the fertilizer matrix particles is improved, the particles have stability, and the slow release effect is favorably exerted.

The invention relates to a method for synthesizing an isoterpinen-4, 8 epoxide. Specifically, the invention provides the preparation method of the isoterpinen-4, 8-epoxide, and the method comprises the following steps: (1) mixing isoterpinene with an organic solvent to obtain a solution A; (2) mixing hydrogen peroxide with EDTA-2Na (Ethylene Diamine Tetraacetic Acid-2Na) to obtain a solution B; and (3) mixing the solution A prepared in the step (1) and the solution B prepared in the step (2), reacting, separating the reaction liquid in an oil-water separator to obtain an oil phase, and separating to obtain the isoterpinen-4, 8-epoxide. The isoterpinene-4, 8-epoxide prepared by the preparation method of the isoterpinene-4, 8-epoxide disclosed by the invention has the advantages of excellent purity, excellent yield and excellent conversion rate.

The invention provides an antistatic agent for fuel oil and a preparation method thereof, and belongs to the technical field of petrochemical engineering, and the preparation method comprises the following steps: S1, adding soybean lecithin and chlorosulfonic acid into dichloroethane, uniformly mixing, under the protection of nitrogen, heating and stirring for reaction, neutralizing reaction liquid, and performing rotary evaporation to obtain sulfonated soybean lecithin; the preparation method comprises the following steps: adding sulfonated soybean lecithin and ethidene diamine into absolute ethyl alcohol, then adding p-toluenesulfonic acid, heating and stirring for reaction, and carrying out reduced pressure distillation to obtain modified soybean lecithin; s2, dispersing the SiO2 particles in absolute ethyl alcohol, adding KH-550, and performing ultrasonic treatment, centrifugation and drying to obtain pretreated SiO2 particles; and uniformly mixing the modified soybean lecithin and the pretreated SiO2 particles, adding the mixture into a supercritical fluid reactor, heating and pressurizing, ultrasonically dispersing, and drying to obtain the antistatic agent. The antistatic agent has the advantages of good dispersibility, strong stability and strong antistatic capability.

The invention discloses a water-non-dispersible cement paste system for well cementation. The water-non-dispersible cement paste system comprises the following components in parts by weight: 100 parts of oil well cement, 2-3 parts of an expanding agent, 1-5 parts of an anti-dispersing agent, 0.5-2 parts of a drag reducer, 0-0.1 part of a defoaming agent and 40-45 parts of water, the anti-dispersing agent is formed by copolymerizing the following components in percentage by mass: 15 to 60 weight percent of acrylic acid, 0 to 15 weight percent of N, N-dimethyl acrylamide, 30 to 85 weight percent of acrylamide, 0 to 10 weight percent of N-vinyl pyrrolidone and 0 to 1.5 weight percent of ethylene diamine tetraacetic acid disodium salt; the drag reducer is obtained by graft polymerization of a polyacrylic acid monomer and fatty acid vinyl ester in a molar ratio of (8-36): 1; the polyacrylic acid monomer is formed by copolymerizing 2-acrylamido-2-methylpropanesulfonic acid, acrylic acid, sodium p-styrenesulfonate and acrylamide according to a molar ratio of (0.08 to 0.6): 1: (0.05 to 0.3): (0.1 to 1); the water non-dispersible cement paste system for well cementation has good dispersion resistance and flowing property, and the water invasion resistance of the cement paste is effectively improved.

The invention provides a composite quality control liquid for an electrochemical multi-parameter detector. The composite quality control liquid comprises a buffer volume, a quality control substance and a stabilizer, the stabilizing agent comprises 5 to 50 g / L of bovine serum albumin, 0.1 to 10 g / L of EDTA-2Na (Ethylene Diamine Tetraacetic Acid), 10 to 100 g / L of a viscosity regulator, 0.3 to 25 g / L of a preservative and 5 to 20 g / L of a surfactant; the preparation method comprises the following steps: adding components of the stabilizer into a buffer system, preparing a preparation solution, preparing mother liquor of each quality control substance, proportionally mixing glucose mother liquor, uric acid mother liquor, beta-hydroxybutyric acid mother liquor and cholesterol sodium sulfate and triglyceride composite mother liquor according to the target concentration of the quality control solution, and fixing the volume by using the preparation solution to obtain the quality control liquid. And fully and uniformly mixing to obtain the composite quality control liquid. The composite quality control liquid can ensure that uric acid is not degraded, cholesterol triglyceride is not separated out, the formula is mild, and active substances in a detection system are not influenced.

A sheet molding compound (SMC) composition formulation including a curable resin, such as unsaturated polyester of vinyl ester, in an ethylenically unsaturated monomer; a low profile additive, in a curable solvent; and an intumescent additive, such as melamine polyphosphate or ethylene diamine phosphate. An article formed of the SMC composition formulation experiences no more than a 100% increase in thickness as compared to an initial thickness of the article after exposure to a flame. The low profile additive is present in the composition and the intumescent additive is present in the composition. The resulting article has a char strength at 3 mm thickness of between 100 and 1,000 Newtons.

The invention belongs to the technical field of detection methods, and provides a method for determining the content of amino acid in chyme in digestive tracts of livestock and poultry, which comprises the following steps: mixing a sample and a peroxyformic acid solution, and reacting to obtain an oxidation system; mixing the oxidation system, a hydrochloric acid solution and a chelating agent solution, and hydrolyzing to obtain a hydrolysis system; mixing the hydrolysis system and alkali liquor, then adjusting the pH value, and then mixing with acid liquor to obtain liquid to be detected; centrifuging the to-be-measured liquid, filtering, injecting a filtering system and the mixed amino acid standard liquid into an automatic amino acid analyzer, and measuring. According to the method, a certain amount of disodium ethylene diamine tetraacetate is added to chelate heavy metals in chyme in digestive tracts of livestock and poultry, and meanwhile, the heavy metals and redundant impurities are removed by adopting the steps of centrifuging, filtering and the like, so that the accuracy of amino acid detection is ensured, and the addicability of digestible amino acid content in daily ration is better. The hydrolysate is treated by adopting simple steps such as pH regulation and centrifugation, so that the operation process is simplified, and the operation error is reduced.

The invention belongs to the technical field of textile pretreatment processes, and particularly discloses a low-temperature washing-free short-process pretreatment process which comprises the following steps: (1) padding a fabric in a working solution, and stirring for 10-12 hours at 20-25 DEG C. The working solution comprises the following raw materials: a scouring agent, an alkali-resistant penetrant OEP-70, hydrogen peroxide, sodium silicate, ethylenediamine tetra (methylene phosphonic acid) pentasodium salt, caustic soda and water; (2) adding a water-free washing agent into the fabric subjected to padding treatment, and heating for 10-15 minutes at the temperature of 98-100 DEG C; (3) carrying out deoxidization treatment on the treated fabric; (4) immersing the treated fabric into the complex liquid, and stirring for 20-25 minutes at the temperature of 40-45 DEG C; the composite liquid is prepared from sodium dodecyl sulfate, modified chitosan, carboxymethyl cellulose, modified plant ash, polyethylene glycol and water. The fabric treated by the method is low in water consumption and high in dyeing efficiency and dye uptake, and the quality of the fabric is improved.

The invention discloses a high-temperature-resistant ceramifiable glass fiber reinforced plastic pipeline and a preparation method thereof. The pipeline is prepared from a component A and a component B, wherein the component A is prepared from 20-35 parts of phenolic resin, 15-30 parts of bisphenol A epoxy vinyl resin, 15-30 parts of low-temperature glass powder, 1-5 parts of flame retardant, 10-20 parts of fire-resistant filler and 5-10 parts of fluxing agent; the component B is prepared from 50 to 75 parts of glass fiber, 10 to 15 parts of ethidene diamine and 5 to 15 parts of solvent. The specific preparation process of the pipeline comprises the following steps: respectively pre-mixing the component A and the component B in a stirrer, then adding the mixed component A and the mixed component B into vacuum stirring equipment, carrying out closed vacuumizing, slowly stirring, and finally, carrying out centrifugal casting, curing, demolding and cutting to obtain the pipeline. The manufactured glass fiber reinforced plastic pipeline is smooth in inner wall, few in pores and small in internal fluid flow resistance, resin and glass fibers are firmly combined, and a firm ceramic heat insulation layer can be rapidly formed on the surface layer of the pipeline in a fire disaster environment to prevent high temperature from permeating inwards, so that the structural strength of the glass fiber reinforced plastic pipeline is kept, and the fire safety is improved.

The invention discloses a hard carbon sodium battery negative electrode material taking peanut shells as a raw material, which is micron-sized particles of mixed nano-particles containing C, O, Na and N. After the material is subjected to ultrasonic dispersion, holes are wrapped by graphitization-like areas with the size range of 0.6-3 nm to form disordered accumulation, and the average graphite layer spacing is 3.6-4.0. The preparation method comprises the following steps: heating and pre-oxidizing the peanut shells in an air atmosphere, grinding or crushing the peanut shells into powder, adding a disodium ethylene diamine tetraacetate solution, uniformly stirring, and drying; and calcining and carbonizing the dried mixture in a nitrogen atmosphere, and cooling to obtain the hard carbon sodium battery negative electrode material taking the peanut shells as the raw material. When the obtained hard carbon material serves as a sodium ion battery negative electrode and is charged and discharged at 0.1 C, the initial charging specific capacity can reach 274-318 mAh.g <-1 >, the first-circle coulombic efficiency reaches 74%-84%, and the problems that a hard carbon sodium battery negative electrode material is low in capacity and low in initial coulombic efficiency are solved.

The invention belongs to the technical field of wastewater treatment, and discloses a magnetic nano composite adsorbent as well as a preparation method and application thereof. The preparation method comprises the following steps: dissolving a divalent iron salt and a trivalent iron salt in water, adding ammonia water under a protective gas, and carrying out a stirring reaction at a rotating speed of 350-600 rpm to prepare Fe3O4 nanoparticles; the preparation method comprises the following steps: dispersing Fe3O4 nanoparticles in a mixed solution of acrylic acid and ethidene diamine, then adding an initiator, and carrying out a stirring reaction at a rotating speed of 150-300 rpm to prepare the magnetic nano composite adsorbent. The magnetic nano-composite adsorbent provided by the invention can efficiently remove lead ions in wastewater, is not influenced by mercury ions and copper ions, also has relatively good adsorption capacity on the mercury ions and the copper ions, and can treat various heavy metal ions in the wastewater at the same time. The magnetic nano composite adsorbent is easy to separate and good in reusability.

The invention belongs to the technical field of sleep-aiding gels, and discloses a herbal sleep-aiding gel and a preparation process thereof, the gel comprises the following components: deionized water, propylene glycol, glycerol, carbomer 980 and triethanolamine; the mask is prepared from, by weight, 1.8% of lavender essential oil, chamomile extract, bitter orange flower essential oil, gamma-aminobutyric acid, melatonin, spina date seed extract, xylaria nigripes extract and phospholipid wall materials. Sodium chloride and azone; camphor and borneol; eDTA (Ethylene Diamine Tetraacetic Acid) disodium, phenoxyethanol and ethylhexylglycerin. The traditional Chinese medicine composition is suitable for people with sleep disorders such as long-term insomnia, difficulty in falling asleep, insomnia and dreaminess, easy awakening due to light sleep, restlessness and depression and the like; through the high transdermal absorption rate of a nano micro-capsule technology, in combination with a colloid double-electrode-layer structure, capacitance-like micro-current is generated, in cooperation with lavender-chamomile-bitter orange flower and other herbal essence and GABA and melatonin active ingredients, the sleep center is adjusted in a multi-channel mode, and the physical sleep-aiding scheme is a new physical sleep-aiding scheme for safely replacing a sleeping drug.

The invention discloses an efficient extraction method of large-molecular-weight astragalus polysaccharide, which belongs to the technical field of plant extraction, and comprises the following steps: cleaning astragalus, filtering, and crushing; the preparation method comprises the following steps: mixing a beta-1, 3-glucanase aqueous solution and trehalose ethylene diamine, and stirring for 10-30 minutes to obtain an enzyme protection system; soaking the radix astragali powder in a citric acid solution, adding an enzyme protection system, applying a bipolar pulsed electric field, and reacting at 40-60 DEG C for 30-40 minutes; adjusting the concentration of the ethanol to 40-50%, standing, centrifuging and collecting crude astragalus polysaccharide; purifying, decolorizing, concentrating, freeze-drying and crushing the crude astragalus polysaccharide to obtain refined astragalus polysaccharide; the mass ratio of the trehalose ethylene diamine to the beta-1, 3-glucanase is (15: 1) to (30: 1). The enzyme protection system maintains the activity of the enzyme, the enzyme and the pulsed electric field act synergistically, the extraction time is shortened, and the extraction rate is increased while the astragalus polysaccharide with large molecular weight is obtained.

The invention discloses self-repairing waterborne polyurethane based on double dynamic bond synergy and a preparation method thereof.The method comprises the following steps that 1, in the nitrogen atmosphere, after isophorone diisocyanate, polytetrahydrofuran diol and dimethylolpropionic acid react for a period of time, a catalyst is added for continuous reaction, and a prepolymer is synthesized; (2) adding N, N-di-tert-butyl ethylenediamine into the prepolymer, and carrying out chain extension reaction; (3) adding dithiothreitol into the solution after the reaction in the step (2) to carry out cross-linking reaction; and (4) adding triethylamine into the solution obtained after the reaction in the step (3), and carrying out a salt forming reaction to obtain the self-repairing waterborne polyurethane emulsion based on double dynamic bond synergy. High self-healing efficiency and mechanical performance are achieved by introducing dynamic covalent bonds with double thermal responses, and reprocessing and recycling are achieved at the same time.

The invention relates to a method for preparing lithium sulfide through a high-temperature solid-phase reaction. Weighing lithium carbonate and powdered sulfur, and putting the lithium carbonate and the powdered sulfur into an agate mortar for grinding; transferring the ground mixture into a high-temperature-resistant ceramic crucible, and putting the ceramic crucible into a vacuum tube furnace for presintering; after the presintering is finished, carrying out high-temperature reaction; after the reaction is finished, turning off a heating power supply of the vacuum tube furnace, and naturally cooling the crucible to room temperature in the furnace; after cooling is completed, opening a furnace door, and taking out the crucible to obtain a lithium sulfide crude product; putting the lithium sulfide crude product and the wear-resistant dispersing agent into the mortar, and grinding and crushing again; then screening by a standard screen to obtain lithium sulfide powder products with different particle sizes; the wear-resistant dispersing agent is prepared by reacting dioctadecylamine, an epoxy succinic acid polymer and ethidene diamine; the lithium sulfide prepared by the method disclosed by the invention has relatively high purity and yield.

The invention discloses a sensing material for detecting atmospheric carboxylic acid, a preparation method, a detection method and application, belongs to the technical field of environmental functional materials, and solves the problems that an existing method is complex in operation and cannot realize real-time online monitoring, the sensing material for detecting atmospheric carboxylic acid is an MOF-802-EDTA-Pt composite film, and the preparation method comprises the following steps: taking 1, 3, 4, 5-tetramethyl-1, 3, 5-tetramethyl-1, 3, 5-tetramethyl-1, 3, 5-tetramethyl-1, 3, 5-tetramethyl-1, 3, 5- The preparation method comprises the following steps: synthesizing an MOF-802 material through a hydrothermal reaction by taking 1, 3, 5-benzene tricarbonic acid (BTC) and aluminum nitrate as raw materials and ethylene diamine tetraacetic acid (Na-EDTA) as a ligand; the preparation method comprises the following steps: dispersing MOF-802 in DMF to form a coating solution, and forming a film on a glass substrate through a pulling method; and then loading platinum nanoparticles, and carrying out solvothermal reaction and vacuum drying to obtain the composite sensing film. The MOF-802-EDTA-Pt composite film has a porous structure and fluorescence characteristics, and detection is realized through a fluorescence quenching effect of carboxylic acid molecules and an MOF skeleton. The method disclosed by the invention is controllable in process and high in material stability, still keeps excellent selectivity under the coexistence condition of interferents such as CO2 and NO2, and is suitable for real-time monitoring of carboxylic acid pollutants in the atmospheric environment.

The invention provides a treatment method for removing EDTA-Ca in a high-salt and high-chlorine lithium-containing mother solution, and belongs to the technical field of lithium salt preparation. The treatment method sequentially comprises the following steps: S100, adjusting the pH value of the lithium-containing mother liquor to be treated to be acidic, and stirring to react for a period of time; s200, after stirring reaction, standing for a period of time, filtering to remove precipitate, and collecting filtrate; s300, adjusting the pH value of the filtrate to be alkaline, adding an oxidizing agent, and stirring to react for a period of time; and S400, heating for a period of time after stirring reaction, filtering to remove precipitate, and collecting filtrate to obtain treated lithium-containing mother liquor. The treatment method can effectively break complexation of EDTA-Ca in the high-salt and high-chlorine lithium-containing mother liquor, effectively remove calcium ions and reduce the EDTA content and solution complexation ability, and has the advantages of less lithium ion loss, low cost, simple and safe process and less impurity introduction.

The invention discloses a method for determining antibiotics in environmental soil, which comprises the following steps: S1, collecting fresh soil, crushing, sieving with a 0.1 mm-0. 2mm sieve, weighing 3 g-5 g of sample, and placing in a centrifuge tube; s2, adding 50-80 mL of a methanol-acetic acid-aqueous solution into the centrifuge tube, oscillating for 3-5 min, then carrying out normal-temperature ultrasonic treatment for 25-30 min, carrying out high-speed centrifugation for 10-15 min at a low temperature of 4-6 DEG C, taking a supernatant, repeatedly extracting residues twice, merging the obtained extract and the supernatant, and concentrating to 10-15 mL to obtain a concentrated solution A; s3, adding 20-25 mL of dichloromethane into the concentrated solution, repeating the extraction operation in the S2 to obtain a concentrated solution B, and adding ultrapure water into the concentrated solution B to dilute the concentrated solution B to 200 mL; and S4, adding 1-1.5 g of disodium ethylene diamine tetraacetate into the diluent obtained in S3, adjusting the pH value to 3.5, enabling the diluent to pass through a small solid-phase extraction column, eluting the small solid-phase extraction column with methanol, blow-drying under nitrogen flow, fixing the volume, passing through a filter membrane, and transferring into a sample bottle for UPLC-MS / MS determination. According to the method, the antibiotic extraction rate and the content determination accuracy are improved.

The invention discloses a Cu-EDTA (copper-ethylene diamine tetraacetic acid) detection device and method based on a solid nanopore detection technology. The method comprises the following steps: preparing an electrolyte solution; obtaining a to-be-detected object, and preparing standard Cu-EDTA solutions with different concentrations based on the to-be-detected object; the electrolyte solution and the standard Cu-EDTA solution are added to the two sides of the solid-state nanopore sensor in the fluid pool respectively; stable voltage is applied to the two sides of a nanopore of the solid nanopore sensor, a current signal is obtained through a signal acquisition system, and the concentration of Cu-EDTA is obtained based on analysis of the current signal. The detection method disclosed by the invention has the advantages of simplicity and convenience in operation, high sensitivity, high response speed and the like, can be widely applied to online monitoring and risk assessment of mining area water body pollutants, and provides scientific basis and technical support for mining area pollution abatement.

A method for preparing diiodosilane, according to one aspect of the present invention, may comprise: a step of injecting an iodine source into a reaction vessel; a step of injecting an inert gas into the reaction vessel and purging same; a first synthesis step of adding a non-coordinating solvent and an ethylene diamine-based catalyst to the reaction vessel, and then stirring same to synthesize a reaction solution; a second synthesis step of maintaining the temperature inside the reaction vessel at a predetermined temperature, injecting dichlorosilane (DCS) into the reaction solution for a predetermined period of time, and then stirring same to increase the yield; a step of filtering out solids from the reaction solution and washing same; and a step of concentrating and reducing the pressure of the reaction filtrate obtained after the washing step, thereby recovering diiodosilane, and can prepare diiodosilane with high yield and / or high purity at low cost.

The invention belongs to the technical field of hydrogen production electrolytic cells, and particularly relates to a preparation method of an electrode for a hydrogen production electrolytic cell, and the preparation method at least comprises the following steps: providing a base material; forming a first catalyst layer on the substrate; and forming a second catalyst layer on the first catalyst layer, when the second catalyst layer is formed, a stabilizer is added into the electrochemical liquid medicine, and the stabilizer comprises one or a combination of more of sodium citrate, potassium citrate, sodium gluconate, disodium ethylene diamine tetraacetate and sodium tartrate. By means of the preparation method of the electrode for the hydrogen production electrolytic cell, the stability of the catalyst on the base material can be improved, exertion of the activity of the catalyst is not affected, then the performance of the water electrolysis hydrogen production electrode is improved, the preparation cost can be reduced, and the preparation process can be simplified.