80 results about "Amino acid solution" patented technology

The invention relates to the technical field of carbon black, in particular to a preparation process of high-adsorbability carbon black, which comprises the following steps: performing pore-forming treatment on carbon black to obtain a porous carbon black material, then treating the porous carbon black material with a first mixed amino acid solution to obtain a carbon black material loaded with a first mixed amino acid adsorption layer, and drying the carbon black material to obtain the high-adsorbability carbon black. And treating the carbon black material with a second mixed amino acid solution to obtain a carbon black material loaded with a second mixed amino acid adsorption layer, and treating the carbon black material loaded with mixed amino acids with laccase and tyrosinase. The carbon black product obtained by the preparation process has high adsorbability, and is used for treating metal ions in wastewater, so that the removal rate of the metal ions is greatly improved.

The invention relates to the technical field of agricultural fertilizer preparation, and discloses a preparation method of a water-soluble fertilizer rich in various active amino acids, which comprises the following steps: S1, preparing an amino acid solution: dissolving various free amino acids or polypeptides in a buffer solution to form an amino acid precursor liquid; s2, constructing a nutrition core layer: adding one or more types of soluble trace element salts and a gelation auxiliary agent into the amino acid precursor liquid to form gelatinous particles; s3, forming an intermediate response layer: coating the core particles with chitosan and phospholipid to form a bimolecular membrane structure. The stability of the particle structure is improved through low-temperature crosslinking and bi-component gelation, and quick response and continuous controlled release in a weak acid environment are realized by combining an intermediate response membrane and an outer controlled release shell layer; by adopting a structure-function integrated design, the suspension property and the dispersity are remarkably improved, and the multi-crop and multi-period precise fertilization requirements are met.

The invention provides a wide pH applicable multi-biomolecule detection MOF probe, a preparation method, a detection method and application, the probe is an MIL-53 (Fe) (at) AA (at) EZ probe, and comprises a metal organic framework MIL-53 (Fe), amino acid and enzyme; the preparation method comprises the following steps: weighing terephthalic acid and ferric chloride hexahydrate, adding into N, N-dimethylformamide, mixing and stirring, pouring the mixed solution into a stainless steel autoclave, heating and reacting, naturally cooling to room temperature, centrifugally separating a product, and washing with N, N-dimethylformamide and absolute ethyl alcohol to obtain the metal organic framework MIL-53 (Fe). The preparation method comprises the following steps: mixing a metal organic framework MIL-53 (Fe) with an amino acid solution, and carrying out ultrasonic treatment and stirring to obtain an MIL-53 (Fe) coated AA solution; the method comprises the following steps: dissolving enzyme in an MIL-53 (Fe) (at) AA solution, uniformly mixing, stirring, centrifugally separating a product, taking precipitate, and drying in vacuum to obtain the MIL-53 (Fe) (at) AA (at) EZ probe. The pH application range is wide, one-step detection can be achieved, and the method has the advantages of being rapid in reaction, high in sensitivity, low in detection limit and easy and convenient to operate.

The invention relates to the technical field of water-soluble fertilizers, in particular to an amino acid water-soluble fertilizer and a preparation method thereof. The amino acid water-soluble fertilizer is prepared from the following raw materials in parts by weight: 60-80 parts of an amino acid solution, 20-30 parts of a nitrogen-phosphorus-potassium fertilizer, 6-10 parts of filler, 4-6 parts of a fermentation material, 2-4 parts of brown sugar, 2-4 parts of ethylenediaminetetraacetic acid ferric sodium salt and 0.6-0.8 part of a microbial agent. According to the amino acid water-soluble fertilizer, the filler is added in the preparation process of the amino acid water-soluble fertilizer, after balsa wood is soaked with sodium hydroxide, lignin is partially degraded, a honeycomb-shaped porous structure is formed, the purpose of increasing the specific surface area is achieved, and the effect of adsorbing nitrogen and potassium ions can be achieved; and after the microbial inoculum is inoculated, mycelia are planted in pores of the filler and secrete exopolysaccharide to wrap fertilizer particles, so that the effect of reducing leaching loss is achieved, the retention time of the fertilizer in soil is delayed, and the loss rate of the fertilizer is effectively reduced.

The invention relates to an amino acid-mediated coal-based solid waste negative carbon filling material and a preparation method thereof, and the method comprises the following steps: adding an amino acid aqueous solution as a fly ash activator and fly ash into a first-section mineralization reaction kettle, introducing CO2 to carry out mineralization reaction, separating slurry obtained by the first-section mineralization reaction to obtain fly ash mineralization residues, and adding the fly ash mineralization residues into the first-section mineralization reaction kettle; the filtrate is recovered to the first-section mineralization reaction kettle for cyclic utilization; adding the coal ash mineralization residues, coal gangue, cement, NaOH, glucose and water into a second-stage mineralization reaction kettle, and introducing CO2 gas for mineralization reaction to obtain the negative carbon filling material. The negative carbon filling material with high carbon sequestration amount and high solid waste mixing amount is prepared through two-stage mineralization reaction, and the material has good fluidity before solidification and certain compressive strength after solidification, and can meet the use requirements of mine filling; wherein the amino acid solution can play a role in leaching Ca < 2 + > / Mg < 2 + > ions in the fly ash, the transfer of protons and CO2 is enhanced, and the carbon sequestration effect is remarkable.

The invention discloses a natural gas hydrate generation accelerant containing amino acid and nano calcium carbonate as well as a preparation method and application of the natural gas hydrate generation accelerant, and belongs to the technical field of natural gas hydrates. The problems of low natural gas hydrate forming rate, low gas storage density, low natural gas recovery efficiency, poor environmental protection property and the like in the prior art are solved. The accelerant is obtained by taking a hydrophobic amino acid solution as a base solution, adding nano calcium carbonate into the base solution and adjusting or not adjusting the pH value. By regulating and controlling the type and the concentration of a base solution in the accelerant, the hydrate formation rate and the gas storage density are improved, and the induction time of hydrate generation is shortened; nanoparticles in the accelerant are small in particle size and large in specific surface area, so that disturbance and convective heat transfer of the accelerant are enhanced; in addition, the chemical components of the nanoparticles in the accelerant and the main component of the seabed sediment with a large amount of natural gas hydrate in the nature are calcium carbonate, the environmental risk is reduced, and the calcium carbonate and hydrophobic amino acid are wide in source and environmentally friendly.

The invention discloses a directional fermentation method for manifesting fragrance of cigar tobacco leaves, and belongs to the technical field of cigar processing. The directional fermentation method comprises the step of spraying an amino acid solution to the cigar tobacco leaves for fermentation. Experiments prove that the sensory quality of the cigar tobacco leaves treated by the directional fermentation method provided by the invention is obviously improved. Meanwhile, the sweet feeling and the mellow feeling are obviously improved, the irritation, the offensive odor and the protein odor are greatly reduced, and the combustibility is improved. Meanwhile, chemical components in the tobacco leaves are more coordinated, the content of neutral aroma substances is increased, and the main effects are that the potassium-chlorine ratio is obviously increased, the nicotine content is reduced, and the contents of carotenoid degradation products and neophytadiene are obviously increased.

The invention relates to the technical field of carbon black, in particular to a production process for improving conductivity of carbon black, which comprises the following steps: activating carbon black with carbon dioxide, then treating with nitric acid to obtain a porous carbon black material, treating the porous carbon black material with a mixed amino acid solution to obtain a carbon black material loaded with a mixed amino acid adsorption layer; then adding a silver nitrate solution, stirring and mixing, dropwise adding a sodium borohydride solution, controlling the reaction temperature and pH, and filtering, washing and drying after the reaction is finished, so as to obtain a high-conductivity carbon black product. By adopting the production process, the conductivity of the carbon black can be greatly improved.

The invention discloses modified activated carbon for indoor formaldehyde adsorption and a preparation method thereof. The method comprises the following steps: 1) preparing an amino acid solution; 2) dipping the activated carbon in an amino acid solution, carrying out ultrasonic oscillation for a certain time, and dipping for a preset time; 3) drying the impregnated activated carbon in a drying box; and 4) placing the dried activated carbon in a tubular furnace filled with shielding gas for high-temperature activation for 2-10 h. The high-temperature activation in the protective gas is beneficial to formation of micropores of the activated carbon, avoids the influence of air or oxygen on amino acid in the heating process, adsorbs the amino acid and derivatives thereof into the micropores formed by the activated carbon, greatly improves polarity modification of the activated carbon, increases effective oxygen-containing functional groups on the surface of the activated carbon, and improves the adsorption capacity of the activated carbon. The adsorption capacity of the activated carbon on formaldehyde polar molecules is enhanced, and the chemical adsorption effect on formaldehyde can be further promoted on the basis of physical adsorption of the activated carbon.

The invention relates to a method for increasing folic acid content of wheat malt seedlings through ultrasonic field and amino acid solution treatment, which belongs to the technical field of agricultural food biology and is characterized in that wheat grains with high germination rate are used as raw materials, and the wheat malt seedlings are cultivated through soaking disinfection, amino acid solution dipping and ultrasonic field treatment and regulation and control of illumination, temperature, humidity and CO2 concentration. And drying and crushing to obtain the wheat malt seedling powder rich in folic acid. According to the method disclosed by the invention, the permeability of cell membranes is enhanced by utilizing an ultrasonic cavitation effect, folic acid precursor absorption and synthetase activation are promoted, the folic acid content in the wheat malt seedlings is effectively increased, and the wheat malt seedling powder with the folic acid content of 450-550mu g / 100g is obtained.

The utility model relates to solid-liquid separation membrane equipment for extracting amino acid by a hydrolysis method, which comprises a rack, the washing assembly comprises sliding rails symmetrically and fixedly arranged on the two sides of the rack, a sliding block capable of moving along the sliding rails is installed on the sliding rails, a water storage tank is fixedly arranged on the other side face of the sliding block, and a plurality of water supply pipes are fixedly installed on the top face of the water storage tank; a spraying head over against a plate frame of the plate-and-frame filter press is fixedly arranged on the inner circumferential surface of the water supply pipe; the moving assembly comprises racks symmetrically and fixedly arranged on the two sides of the rack, a rotary power mechanism is installed on the side wall of one water storage tank, and a driven gear shaft is installed on the side wall of the other water storage tank; water flow flushing is adopted to replace a traditional filter cake pressing link, tedious steps such as air inflation, pressure maintaining and plate frame pulling are omitted, time consumed for solid-liquid separation of the same batch of amino acid solutions is greatly shortened, the production rhythm is accelerated, and the overall production efficiency is improved.

The invention discloses a method for preparing iron phosphate based on deep copper removal of waste lithium iron phosphate battery powder. The method comprises the following steps: firstly, mixing the waste lithium iron phosphate battery powder with an amino acid solution, and carrying out complex reaction to remove copper; and then on the basis of copper removal, the iron phosphate is prepared through the procedures of acid leaching, impurity removal, oxidation, aging and calcination. According to the copper removal method, the copper element in the waste lithium iron phosphate battery powder can be fully removed, and meanwhile the loss of other elements is reduced; the iron phosphate prepared on the basis of the method is not only low in copper content, but also more uniform in particle and high in conductivity.

The present invention relates to glucose solutions for parenteral administration comprising glucose and a pharmaceutically acceptable form of iron, as well as to containers comprising, in separate chambers, said glucose solutions and a lipid emulsion for parenteral administration and / or an amino acid solution for parenteral administration.

This invention relates to a dual-mode chiral sensing platform, its preparation method, and its application for identifying amino acid enantiomers, belonging to the field of electrochemical sensing technology. The preparation method includes the following steps: preparing an MXene-gold nanoparticle-N-acetyl-L-cysteine ​​chiral solution; preparing an MXene-gold nanoparticle-N-acetyl-L-cysteine / L(D)-amino acid solution; preparing an MXene-gold nanoparticle-N-acetyl-L-cysteine ​​modified electrode; electrochemical chiral recognition of amino acid enantiomers; and temperature-based chiral recognition of amino acid enantiomers. This invention utilizes MXene, a two-dimensional nanomaterial with excellent conductivity and photothermal conversion capabilities, as a carrier to in-situ load gold nanoparticles. N-acetyl-L-cysteine ​​containing a thiol group at the end is captured through Au-S bonds. This chiral material can achieve chiral recognition of amino acid enantiomers through both electrochemical and temperature-based chiral sensing modes.

The invention relates to the field of agricultural planting, and provides nano-selenium as well as a preparation method and application thereof. The preparation method comprises the following steps: S1, mixing a selenite solution, a polysaccharide solution and an amino acid solution, and carrying out first reaction to obtain a mixed solution; s2, mixing the mixed solution with a reducing agent solution, and carrying out a second reaction to obtain nano-selenium; the molar ratio of selenite in the selenite solution to polysaccharide in the polysaccharide solution is (1-5): 1; the molar ratio of a reducing agent in the reducing agent solution to selenite in the selenite solution is (2-6): 1. When the nano-selenium formed based on the preparation method is applied to crop planting, the selenium enrichment efficiency and the organic selenium conversion efficiency can be remarkably improved, after the nano-selenium is sprayed to crop leaf surfaces, crops can efficiently absorb selenium elements and convert the selenium elements into organic selenium, meanwhile, the effects of reducing cadmium and increasing the yield are achieved, and the selenium content is reduced. A safe and efficient novel selenium fertilizer solution is provided for selenium-rich functional agriculture, and the application prospect is wide.

The invention discloses an electrochemical biological chiral sensor based on a gold and silver nanostar composite material. The electrochemical biological chiral sensor comprises an electrode substrate and the gold and silver nanostar composite material modified on the electrode substrate, the gold and silver nanostar composite material is a composite material with a gold nanostar material as a core and silver as a shell. The invention further discloses a preparation method of the electrochemical bio-chiral sensor and a method for identifying amino acid enantiomers by adopting the electrochemical bio-chiral sensor. After the electrochemical biological chiral sensor provided by the invention is incubated in different chiral amino acid solutions, the measured redox peak values are different, and by comparing the redox peak values of the to-be-detected amino acid solution and the same amino acid D-type and L-type enantiomers, the amino acid in the to-be-detected solution can be identified to be D-type, L-type or mixed type.

This utility model relates to the field of rapeseed oil production technology, specifically to a quantity control device for adding amino acid ingredients in rapeseed oil production. It includes a storage cylinder with a slidingly fitted pusher inside, which divides the storage cylinder into a liquid chamber and a gas chamber from bottom to top. Multiple discharge nozzles are located at the bottom of the storage cylinder, each with a discharge hole in the center, connected to the liquid chamber. Air vents are located on the top wall of the storage cylinder, connected to the gas chamber. An air pump is located on one side of the storage cylinder, connected to the air vents via a pipe, on which a volumetric flow meter is installed. The device also includes a microprocessor, with the air pump and volumetric flow meter electrically connected to it. This utility model solves the technical problem in the prior art where the high viscosity of the amino acid solution causes it to easily adhere to the conveying pipe, resulting in a large deviation between the actual and set amount of amino acid added.

The application discloses a tobacco extract preparation method, which comprises the following steps: (1) one-time feeding: preparing a carbonated salt-amino acid mixed aqueous solution, uniformly applying the mixed aqueous solution to tobacco raw materials, and standing at room temperature; (2) drying: performing heating treatment on the tobacco raw materials after feeding, and drying; (3) secondary feeding: uniformly applying a polyol to the dried tobacco raw materials; (4) extrusion: performing extrusion and puffing treatment on the tobacco raw materials after feeding, and obtaining treated tobacco raw materials; and (5) extraction: performing extraction and separation on the treated tobacco raw materials, and obtaining a tobacco extract. The carbonated salt-amino acid solution can improve feeding uniformity, improve the pH of the system to reduce nicotine, drying is beneficial to subsequent reactions, the polyol improves material fluidity and prevents extrusion die blockage, extrusion and puffing high-temperature and high-pressure degrade macromolecules, and the tobacco aroma is improved. The extract can be used for heat cigarettes, the aroma is richer, and the odor and irritability are obviously reduced.

The invention discloses an organic water-soluble fertilizer for improving plant immunity and a preparation method thereof, and relates to the technical field of plant fertilizers. The fertilizer comprises the following components: keratin hydrolyzed amino acid liquid, a sugar alcohol calcium solution, disodium octaborate tetrahydrate, a glycine boric acid compound, zinc sulfate heptahydrate, sodium molybdate dihydrate, an echinacea extract, hydroxypropyl-beta-cyclodextrin, chitosan oligosaccharide, sodium alginate and polyglutamic acid. The preparation method comprises the following steps: firstly, inclusion of an echinacea purpurea extract with hydroxypropyl-beta-cyclodextrin to form an echinacea purpurea-cyclodextrin mixed solution; then, zinc, molybdenum and the keratin hydrolysis amino acid liquid are chelated step by step, and a Zn-Mo-amino acid compound is formed; sequentially adding sugar alcohol calcium and a composite boron source, finally mixing with a colloidal network constructed by chitosan oligosaccharide, sodium alginate and the like, adjusting the pH value, and then homogenizing and filtering. Through organic chelation and molecular inclusion technologies, the immunologic function and stability are improved, and the disease incidence rate is effectively reduced.

The invention discloses a method for preparing humus by using urban solid waste. According to the method, a humus solution is obtained through separation and purification by means of citric acid solution soaking, microbial culture, chelating agent chelation and the like, then the humus solution and an amino acid solution are mixed for a hydrothermal reaction, then freeze drying is conducted, and the high-activity humus product is obtained. The humus product prepared by the method is high in purity and high in biological activity, urban solid waste is effectively utilized, an innovative solution is provided for resource utilization of dredged sediment and perishable solid waste, and the humus product has remarkable environmental benefits and economic benefits.

The application belongs to the field of biochemical synthesis instruments, and discloses a 96-channel synthesis instrument and a control method thereof. The instrument comprises a body, a synthesis operation cavity and a reagent storage and transportation cavity which are arranged in layers and are isolated from each other inside the body, a mechanical arm and a pipettor which are capable of multi-axis movement are arranged in the synthesis operation cavity, and amino acid bottles are arranged in an array. The core structure is a rotary feeding mechanism, 96 reactors which are uniformly distributed in a circle are arranged on the periphery of a rotary feeding disc of the rotary feeding mechanism through quick release mechanisms, a liquid adding tower is fixed above a corresponding liquid adding station, and the liquid adding tower is used for adding solvents or activating reagents to the reactors in a quantitative manner. The mechanical arm is responsible for the preparation and transfer of amino acid solutions, and the liquid adding tower is responsible for batch solvent treatment. The rotary feeding mechanism, the mechanical arm and the liquid adding tower are cooperated to realize efficient division of labor and parallel synthesis. The application has a compact structure, and the design of combination of rotary feeding and fixed liquid adding significantly improves the synthesis efficiency, operation stability and maintenance convenience.

The invention discloses an amino acid water-soluble fertilizer containing gamma-aminobutyric acid (GABA) and a preparation method of the amino acid water-soluble fertilizer, and belongs to the technical field of fertilizers. The preparation method comprises the following steps: mixing a GABA fermentation solution serving as a substrate solution with amino acids such as arginine and glycine to obtain a compound amino acid solution, chelating trace elements with EDTA (Ethylene Diamine Tetraacetic Acid) to obtain a chelated mixed solution, and mixing the compound amino acid solution and the chelated mixed solution to obtain the uniform and stable amino acid water-soluble fertilizer containing GABA. Through comprehensive proportioning, the amino acid water-soluble fertilizer can accurately meet the differentiated nutrient requirements of crops in the whole life cycle from germination, growth to maturation, it is ensured that optimal nutrient supply is obtained in each key stage, the amino acid fertilizer can rapidly supply nutrients, and the amino acid water-soluble fertilizer has wide application prospects.

An MoVTeNbOx-based metal oxide molded catalyst, and a molding method therefor and the use thereof. The molding method comprises the following steps: A) mixing an MoVTeNbOx-based metal oxide raw powder catalyst, an inert substance and a sesbania powder, performing kneading, and sequentially spraying an alkaline amino acid solution, an acid solution and a halogen compound solution during the kneading process to obtain a kneaded material; B) performing extrusion molding on the kneaded material, and drying same to obtain a catalyst blank; and C) roasting the catalyst blank to obtain an MoVTeNbOx-based metal oxide molded catalyst. By introducing an alkaline amino acid, the secondary pore structure of the catalyst is optimized, and the selectivity is greatly improved. In addition, a trace amount of a halogen is introduced as an inhibitor, and the addition of the alkaline amino acid and the inhibitor makes the MoVTeNbOx catalyst have an acrylic acid selectivity of 80% or more, thereby greatly reducing the generation of by-products.

This invention provides an amino acid-activated ice capable of easily and quickly generating gas hydrates, a method for generating the same, and a gas hydrate using amino acid-activated ice, as well as a method for generating the same. [Solution] The amino acid-activated ice is made by freezing an aqueous amino acid solution containing hydrophobic amino acids and dissolved CO2 gas. The concentration of amino acids in the aqueous amino acid solution containing hydrophobic amino acids may be in the range of 0.01 wt% to 2.0 wt%. The hydrophobic amino acid may be any one of leucine, methionine, glycine, phenylalanine, tryptophan, and histidine.

The present invention relates to a preparation method of carbonization-modified steel slag with improved hydration activity, modified steel slag and an active admixture for cementitious materials. The preparation method of the present invention includes: dissolving acidic amino acids to obtain an amino acid solution and heating it to the reaction temperature; adding steel slag into the stirring amino acid solution to produce a steel slag suspension, and then introducing CO2 gas into the steel slag suspension to start the reaction; after the reaction is completed, separating the solid from the system, and adding ethanol to the obtained solid, and drying to obtain steel slag. The preparation method of the present invention breaks the inherent view of the prior art, realizes the simultaneous improvement of the soundness and hydration activity of steel slag, and even can improve the hydration activity by extending the reaction time. The operation of the present invention is simple and has strong practicability. In addition, the acidic amino acid additive used belongs to a bio-friendly material and is non-toxic and harmless.

The invention provides a preparation method of melamine resin foam, and belongs to the technical field of organic polymers. Melamine, paraformaldehyde, an amino acid solution and sodium hydroxide are used as main materials of resin; adding a specific comonomer, and carrying out a prepolymerization reaction; then adding sodium alkyl benzene sulfonate and an amino acid solution; additionally adding nano particles to carry out a repolymerization reaction; then adding a mixed additive composed of sodium alkyl benzene sulfonate, n-pentane, formic acid and the like for microwave foaming; the melamine resin foam is obtained; the mechanical property is good.

The utility model provides an amino acid purification device, which relates to the technical field of amino acid processing, and comprises a cylinder body, the top of the cylinder body is fixedly connected with a cover plate, the bottom of the cylinder body is fixedly connected with a support plate, the inner surface of the support plate is fixedly connected with a rotating motor, and the output end of the rotating motor is fixedly connected with a screw rod. According to the crystal cleaning device, a rotating motor is started, under the action of a lead screw and a guide rod, a lifting plate and a connecting pipe move downwards, a scraping ring is driven to move downwards along the interior of a barrel body, crystals adhering to the inner wall are scraped, meanwhile, when the scraping ring moves downwards, a water pump can continuously pump out cleaning liquid in a water tank, and therefore the crystals are cleaned. The cleaning liquid is conveyed into the scraping ring through the hose and the connecting pipe, so that the cleaning liquid is uniformly sprayed to the inner wall of the barrel through the inclined holes to assist the scraping ring in removing residual crystals, the crystals are prevented from being left on the barrel, good conditions are provided for subsequent crystallization treatment of the amino acid solution, and the treatment efficiency is improved.

This invention discloses a parenteral nutrition solution preparation and delivery device, comprising a first mixing component, a second mixing component, a third mixing component, a secondary mixing chamber, a transfer chamber, a tertiary mixing chamber, and a frame. The first mixing component mixes phosphate-free electrolytes, water-soluble vitamins, and trace elements into a compound amino acid solution. The second mixing component mixes phosphates into a glucose solution. The third mixing component mixes fat-soluble vitamins into a fat emulsion. The secondary mixing chamber further mixes the mixed amino acid solution and the mixed glucose solution. The transfer chamber agitates the mixed solution to ensure thorough mixing. The tertiary mixing chamber adds the fat emulsion containing fat-soluble and water-soluble vitamins to the amino acid and glucose mixture. This device, through the coordinated operation of its components, enables the rapid and accurate preparation of large quantities of parenteral nutrition solution, and the preparation process is carried out within a sealed container, preventing contamination of the nutrient solution by the external environment.

The present invention provides a MoVTeNbOx-based metal oxide shaped catalyst, a forming method, and applications thereof, comprising the following steps: A) mixing a raw MoVTeNbOx-based metal oxide catalyst powder, an inert substance, and sesbania powder, kneading the mixture, and sequentially spraying an alkaline amino acid solution, an acid solution, and a halogen compound solution during the kneading process to obtain a kneaded material; B) extruding the kneaded material into a shaped catalyst body, and drying the resulting body to obtain a catalyst body; and C) calcining the catalyst body to obtain a MoVTeNbOx-based metal oxide shaped catalyst. This application introduces alkaline amino acids to optimize the catalyst's secondary pore structure, significantly improving selectivity. Furthermore, a trace amount of halogen is introduced as an inhibitor. The addition of the alkaline amino acid and the inhibitor enables the MoVTeNbOx catalyst to achieve an acrylic acid selectivity exceeding 80%, significantly reducing the formation of byproducts.

The invention relates to the technical field of detection of amino acid components in fermented soybean, in particular to a method for determining the content of amino acid components in fermented soybean. Comprising the following steps: (1) preparing a fermented soybean sample into a fermented soybean extraction solution; (2) preparing a fermented soybean test solution from the fermented soybean extraction solution; (3) diluting the amino acid solution into different concentration gradients to obtain a mixed amino acid reference substance solution; preparing the mixed amino acid reference substance solution into an amino acid derivatization reference substance solution; (4) preparing a blank derivatization reagent from the hydrochloric acid solution by using the derivatization reagent; and (5) carrying out ultra-high performance liquid chromatography on the fermented soybean test solution, the amino acid derivatization reference substance solution and a blank derivatization reagent. The invention provides an efficient, accurate and reliable method for amino acid analysis of fermented soybean and other fermented food, and the method has important significance for improving the product quality, optimizing the production process and promoting related research.