233 results about "Residual solvent" patented technology

The invention relates to the technical field of membrane separation, in particular to a composite forward osmosis membrane based on mussel bionic interface enhancement and a preparation method thereof. The preparation method comprises the following steps: immersing a base material in a dopamine hydrochloride solution for oscillation reaction to obtain a modified base material; the surface of the modified base material is coated with a membrane casting solution in a blade coating mode, then phase inversion is carried out, the residual solvent is removed, then airing is carried out, and the composite forward osmosis membrane based on mussel bionic interface enhancement is obtained. By introducing the mussel bionic polydopamine intermediate layer, the long-standing technical contradictions of poor interfacial compatibility and weak binding force between the hydrophobic substrate and the hydrophilic separation layer are ingeniously solved, and the internal concentration polarization effect is remarkably inhibited. The prepared composite membrane has the advantages of high water flux, low salt reverse flux, stable structure and the like, and has wide application prospects in the fields of water treatment and substance separation.

The invention belongs to the technical field of alkaline electrolyzed water, and relates to a preparation method of an LDH / PSF / PP composite anion exchange membrane, which comprises the following steps: step 1, uniformly dispersing PSF polymer molecules in a polar organic solution to form a PSF polymer solution; step 2, preparing LDH with a high specific surface area, and uniformly dispersing the LDH into the PSF polymer solution to prepare a membrane casting solution; 3, blade-coating the prepared membrane casting solution on a PP support net to form a serous membrane, and then transferring the composite membrane to a drying oven for a pre-evaporation process; step 4, transferring the pre-evaporated composite membrane into a coagulating bath for phase inversion, and curing the PSF in the coagulating bath due to solvent precipitation so as to form a solid composite membrane; and step 5, soaking the prepared solid composite membrane in deionized water to remove the residual solvent. The preparation method of the LDH / PSF / PP composite anion exchange membrane has the advantages of low surface resistance, high gas barrier property, high mechanical strength and capability of realizing large-scale preparation, and is a preparation method of the LDH / PSF / PP composite anion exchange membrane with relatively high innovativeness.

The invention discloses a preparation method and application of a polymer membrane based on solvent in-situ functionalization enhancement. The method comprises the following steps: dissolving a polymer raw material by adopting a polymerizable solvent to form a homogeneous membrane casting solution; then synchronously carrying out ultraviolet light induced polymerization on the residual solvent in the membrane in the membrane casting liquid phase separation forming process by utilizing a constant-temperature circulating coagulating bath carrying an ultraviolet light illumination system; performing drying treatment to obtain a flat plate / hollow fiber composite membrane; the method is applied to the aspects of seawater desalination, wastewater treatment, food processing, biological medicine, energy chemical industry and the like. By utilizing dual functions of the solvent, polymerized solvent molecules and macromolecular chains form a stable cross-linked interpenetrating network structure, functional design of the membrane is realized through customizability of the solvent, functionalization enhancement of the membrane is realized while the process is simplified, ultraviolet polymerization synchronously optimizes phase separation kinetics, and the performance of the membrane is improved. Uniform surface pore size distribution and efficient mass transfer channels are formed, and the advantages of high efficiency and customizability are shown.

The invention relates to the technical field of liquid chromatographic analysis, and discloses a data acquisition method and system of a liquid chromatograph. The method comprises the following steps: extracting chromatograms without solvent residues and with known solvent residues from a historical database, and training by using a self-encoding neural network and a convolutional neural network to generate a baseline reference model and a ghost peak early warning model; obtaining solvent parameters of the previous analysis method, and calculating the residual solvent concentration through residual solvent information; inputting the residual solvent concentration into the baseline reference model and the ghost peak early warning model, and calculating to obtain a baseline drift prediction correction value and a ghost peak prediction risk area; pre-correcting the chromatographic signal acquired in real time to obtain a purified chromatographic signal; performing qualitative and quantitative analysis on the purification signal according to dynamic allocation resources of the ghost peak risk area to generate final chromatographic data; the data interference of the mobile phase residue is effectively eliminated, and the accuracy of data acquisition is improved.

The utility model relates to a washing, dewatering and drying device for resin particles. The washing, dewatering and drying device comprises a barrel, a filtering barrel, a spraying mechanism and a drying mechanism, and the barrel is provided with a feeding port and a drainage port; the filtering barrel is arranged in the barrel body so as to divide the interior of the barrel body into a material cavity located on the side, close to the feeding opening, of the filtering barrel and a water drainage cavity located on the side, close to the water drainage opening, of the filtering barrel; the spraying mechanism is arranged above the filtering barrel, and the drying mechanism is communicated with the material chamber. Resin particles can fall onto the filtering barrel through the feeding hole to realize dehydration; the spraying mechanism can be used for cleaning resin particles on the filtering barrel, residual solvents in the resin particles can be washed and leached out, and sewage can flow into the drainage cavity through the filtering holes and then is discharged to the outside through the drainage opening; the drying mechanism can dry resin particles in the material cavity, dewatering, cleaning and drying can be integrated, the problem that the resin particles are seriously rubbed can be avoided, the structure is simple, and the production efficiency can be improved.

The invention discloses a multilayer microencapsulated small molecule peptide liposome as well as a preparation method and application thereof. According to the invention, a'liposome-wall material 'double-embedding structure is formed by optimizing the phospholipid purity and compounding the hydrophilic wall material and the stabilizer, and a high-pressure homogenization and low-temperature spray drying combined process is adopted, so that the preparation process is green and environment-friendly. The obtained lipidosome has the characteristics of good fluidity, excellent sensory characteristics, high stability and the like, the solvent residue is far lower than the industrial standard, and the lipidosome can be widely applied to dosage forms such as tablets, capsules, solid beverages and the like. According to the technology, the production process is simplified, the use of toxic solvents is avoided, the bioavailability of the small molecule peptide is remarkably improved, and the problems of stability and production cost in industrial application are solved.

The invention belongs to the field of high polymer material synthesis, and provides a method for preparing polyphenylene sulfide from high-purity p-dichlorobenzene, which adopts the whole process design of pre-construction of a composite sulfur source intermediate, regulation and control of an end group controllable oligomerization polyphenylene sulfide intermediate, segmented polymerization of the high-purity p-dichlorobenzene and precise dehydration-washing-drying. The ultra-low impurity level of 0.05-0.25 wt% of burning residues of the polyphenylene sulfide product, the sodium ion content of 10-200 mg / kg and the chloride ion content of 10-500 mg / kg is achieved, and meanwhile the high-performance stability of the melting point of 270-300 DEG C, the gel fraction of 92-99 wt% and the water content of 0.01-0.20 wt% is kept. The problems of deep removal of inorganic ions and ash content, balance of gel fraction and processability and control of residual solvents in the traditional polyphenylene sulfide preparation process are solved, and the method has wide application value in the fields of high-performance engineering plastics, special fibers, electronic packaging materials and the like.

The invention relates to the field of PCB transfer, in particular to a transfer trolley for PCB production and processing. According to the transfer trolley, a closed space is formed by a sleeve shell and an electric control lifting cabin and used for preventing harmful chemical gas from leaking outwards, hot air flow is conveyed to all layers of PCBs through an air heater so as to accelerate volatilization of residual solvents and the harmful chemical gas, then volatile matter is pumped to an activated carbon layer through an exhaust fan to be adsorbed, and through the process, the residual solvents and the harmful chemical gas can be recycled. According to the PCB stacking device, the PCB residual solvent can be rapidly volatilized and harmful gas can be collected and treated synchronously in the transferring process, and in addition, the stacking operation of all PCBs in the electric control lifting cabin can be rapidly completed by pulling open the side supporting plates between the C-shaped inserting rails; the technical problem that each PCB transfer trolley needs to be parked for a long time to wait for a PCB to wait for volatilization of a residual solvent, and the use efficiency of the PCB transfer trolley is seriously affected is solved.

The invention discloses a health food quality safety tracing system based on a block chain. According to the system, an optimization model taking health food quality risk assessment as a target is constructed; selecting the total number of bacterial colonies, the number of pathogenic bacteria, solvent residues, water activity, temperature, air pressure, granularity, mixing uniformity, effective component quantification, dissolution rate, residual oxygen amount and the like as core parameters, and constructing an optimized objective function; in addition, the system monitors and adjusts key parameters such as the temperature, the air pressure, the granularity and the residual oxygen content of the health-care food in real time through the AI driving module, and the food safety coefficient is improved; according to the invention, the conversion from passive supervision to active prevention is realized, the food qualification rate and the resource utilization rate are improved, and the method can be used for links of food production, transportation, sales and the like.

The invention discloses a polyolefin graft modification method based on coating and photochemical reaction, which comprises the following steps: step 1, raw material preparation: mixing 20-50 parts by weight of glycidyl methacrylate (GMA), 1-5 parts by weight of benzophenone (BP) and 1-2 parts by weight of triethylamine (TEA), and uniformly stirring to obtain a mixed solution; 2, coating: coating the surface of a polyolefin film with the mixed solution obtained in the step 1, wherein the coating weight is 1g / m < 2 >-3g / m < 2 >; the method has the beneficial effects that a peroxide initiator is not needed, the reaction is initiated by ultraviolet light, the reaction condition is mild, polyolefin degradation and side reaction are reduced, and the grafting rate is greater than 3.5%; ethyl acetate and other low-toxicity solvents are adopted, residual solvents can be removed through oven treatment, and the environment-friendly requirement is met; active groups such as an epoxy group are introduced into a grafted product, so that the compatibility with a polar material is remarkably improved, and the breaking strength is improved by more than 50% compared with that of common PP; the polyolefine can be used as an interface compatibilizer, a macromolecular coupling agent and the like, and the application of the polyolefine in the high-end field is expanded.

The objective is to provide 5-aminolevulinic acid or its salts and a method for producing the same, which have fewer impurities and residual solvents and suppressed discoloration compared to conventional methods. The objective is to provide 5-aminolevulinic acid or its salts, wherein, based on peak area obtained by HPLC analysis, the ratio of the content of individual impurities to the content of 5-aminolevulinic acid or its salt is 0.0007 or less, and the sum of the ratios of the content of individual impurities to the content of 5-aminolevulinic acid or its salt is 0.0016 or less.

The invention discloses a crystal form and a preparation method of Alalistrum hydrochloride, the crystal form comprises a crystal form Form3, a crystal form 4 and a crystal form Form11, Alalistrum hydrochloride solids Form3 (methanol-water composite solvate), Form4 (hydrate) and Form11 can be obtained by mixing and dissolving Alalistrum hydrochloride solids and an organic solvent, and then adopting the modes of crystallization, crystal mush and volatilizing, and the Alalistrum hydrochloride solids Form3 (methanol-water composite solvate), Form4 (hydrate) and Form11 can be obtained by using the crystal form of Alalistrum hydrochloride and the preparation method of the crystal form of Alalistrum hydrochloride and the preparation method of the crystal form of Alalistrum hydrochloride. The preparation method disclosed by the invention is simple in process, strong in operability, high in yield, high in purity and good in crystallinity, and the crystal form disclosed by the invention is high in solubility, few in residual solvent and good in solid property and meets the medicinal development standard.

The utility model discloses a polymerization system for dehydration condensation reaction, which belongs to the technical field of polymer production and comprises a polymerization reaction kettle, a through hole is arranged at the top of the polymerization reaction kettle, a tower column is vertically arranged on the through hole, the tower column comprises a plurality of tower sections which are sequentially communicated from top to bottom, and fillers are arranged in the tower sections. A tower cap is arranged at the top end of the tower section located at the uppermost end of the tower column, a cooling jacket and a thermometer are arranged on the tower cap, a gas phase outlet is formed in the upper portion of the tower cap and connected with a water removal tank, a gas outlet in the top of the water removal tank is connected with a recovery device, and a vacuum pump is connected to the tail end of the recovery device in the running direction of the recovery device; the vacuum pump is connected with a PLC. By utilizing the tower column, a solvent and a monomer with high boiling points are condensed, and water and impurities with lower boiling points leave the tower column, so that the raw material waste is reduced while the reaction is promoted; a water removal tank is arranged to absorb moisture in gas, so that the moisture in the gas is prevented from condensing when residual solvents and monomers are condensed in the recovery device, and the separation effect is not influenced.

The invention belongs to the technical field of pharmaceutical analysis, and particularly relates to a method for determining a residual solvent in LXH-1211 by adopting headspace gas chromatography. Preparing a reference solution and a test solution of the LXH-1211, respectively carrying out headspace equilibrium on the blank solution, the reference solution and the test solution, injecting the solutions into a gas chromatograph in a headspace sample injection manner, recording a chromatogram, and calculating the content of the residual solvent in the test solution by peak area according to an external standard method; wherein the residual solvent is one or more of methanol, ethanol, dichloromethane, dioxane, N, N-diisopropylethylamine or N, N-dimethylformamide. The method is high in sensitivity, good in repeatability and high in accuracy, and can be used for simultaneously detecting the contents of various residual solvents in the LXH-1211, so that the quality of the LXH-1211 is ensured, and the safety of clinical medication is improved.

The invention relates to the technical field of laser welding, in particular to self-adaptive laser welding equipment. According to the technical scheme, the device comprises a machining table, a transverse guide rail is fixedly connected to the top end of the machining table, and an adjusting frame is installed at the top of the transverse guide rail. By arranging a scraping structure, multiple sets of scraping blocks can be driven to rotate through rotation of a cleaning disc, and impurities on the surface of a metal plate are scraped through waterproof abrasive paper arranged on the scraping blocks; by arranging the softening structure, a small amount of solvent can be quantitatively added to the metal plate to soften impurities such as oil stains on the metal plate, the softening efficiency is improved by cooperating with the solvent adsorption of the erasing block, and by arranging the erasing structure, the residual solvent and impurities on the surface of the metal plate can be cleaned, so that the surface of the metal plate is kept clean and tidy; and the problem that oil stains or oxidation films on the surfaces of the metal plates can generate adverse effects on welding is solved.

This application discloses a novel tail gas absorption and desorption system for soybean oil extraction, comprising: an identification module, an absorption module, a magnetic field module, and a feeding module. The identification module is used to identify hazardous substances, and the specific identification steps are as follows: real-time acquisition of risk data, calculation of migration risk index based on risk data, and adjustment of absorption parameters according to migration risk index; acquisition of pressure data and valve status data of the absorption tower in the absorption module, calculation of escape risk index, and classification of escape risk level according to escape index; monitoring of residual solvent concentration in tail gas, adjustment of spray volume and centrifuge status according to residual solvent concentration, and automatic switching of treatment scheme according to the magnitude of migration risk index through a graded treatment mechanism, thereby achieving effective control and removal of hazardous substances in degummed oil, reducing hazardous substance residue, and improving the quality and safety of degummed oil.

The present invention provides a method for preparing spermidine, which relates to the technical field of organic synthesis. The method for preparing spermidine comprises: condensing 3-chloropropylamine hydrochloride and triphenylmethane to obtain 3-chloro-N-tritylpropylamine; condensing 3-chloro-N-tritylpropylamine and 1,4-butanediamine to obtain N 1 ‑(3‑(tritylamino)propyl)butane‑1,4‑diamine; N 1 The trityl group is removed from 1,4-(3-(tritylamino)propyl)butane to obtain spermidine hydrochloride; and spermidine hydrochloride is liberated in the presence of a base to obtain spermidine. The preparation method of the present invention can achieve a high yield and purity in a relatively short reaction period, avoids the problems of a high proportion of by-products, high purification difficulty, and residual solvent, improves the reaction efficiency, and has mild reaction conditions, simple production equipment, and is more energy-saving and environmentally friendly while being convenient for industrialized amplification production.

The invention discloses a high-strength sealing material for vehicles as well as a preparation method and application thereof, and belongs to the technical field of high polymer materials. The sealing material is prepared by the following steps: mixing polytetrahydrofuran ether glycol and hydroxyl-terminated polydimethylsiloxane, carrying out vacuum dehydration, cooling, adding diphenylmethane diisocyanate under the protection of nitrogen, adding surface modified nano mica sheets, cellulose nanocrystals and part of a solvent after the reaction is finished, uniformly mixing, and carrying out vacuum drying to obtain the sealing material. Then adding an ultraviolet absorbent, an antioxidant and the residual solvent, and mixing to obtain a functional polyurethane prepolymer mixture; dissolving a chain extender, an organic bismuth catalyst and an accelerant in an ethyl acetate solvent to obtain a curing agent mixed solution; and mixing the functional polyurethane prepolymer mixture with the curing agent mixed solution to obtain the functional polyurethane curing agent. The flexible siloxane chain segment and the modified filler are embedded into the polyurethane matrix, so that the material has excellent hydrophobicity, toughness, mechanical strength and sealing performance.

The invention relates to the technical field of crystal structure prediction, and discloses a quantum algorithm-based energetic CxNyOz crystal structure prediction method, which comprises the following steps of: calculating an evaporation and diffusion dimensionless number and capillary pressure by obtaining surface tension, a contact angle, a geometric feature scale, temperature, partial pressure, a diffusion coefficient and an evaporation rate; establishing a residual solvent mole fraction and solvent chemical potential sequence; constructing a binary layer occupancy model Hamiltonian containing layer occupancy energy, adjacent layer action energy, a capillary pressure volume term and a molecular polarity action term, and obtaining a hierarchical occupancy number by using a quantum approximation optimization algorithm; calculating interlayer respiration and shear frequency and mode volume sensitivity based on a quantum variation algorithm; and finally, the lattice spacing and the prediction result are obtained through cost functional minimization, and accurate prediction and quantitative analysis of the structure of the energetic crystal under the unbalanced desolvation condition are realized.

This invention discloses a stirred synthesis method for the production of 5-methyluridine, comprising the following steps: S1. forming a homogeneous initial reaction system; S2. obtaining a uniformly mixed intermediate reaction system with consistent temperature distribution; S3. obtaining a final reaction system; S4. obtaining a crystallization-inducing system; S5. obtaining a crystal-mother liquor suspension system; S6. obtaining a mature suspension system with completed crystal growth; S7. stopping depressurized bubbling and gradually reducing the shear pulse amplitude while maintaining low-speed three-dimensional suspension flow field stirring to age the crystals, obtaining an aged crystal suspension system; S8. terminating stirring to obtain the target product, 5-methyluridine crystals. After drying, the residual solvent content of 5-methyluridine in this invention is less than 0.05%, and its color and melting point meet pharmaceutical-grade standards.

The invention belongs to the technical field of metal battery negative electrode materials, and particularly discloses a sulfur-doped hard carbon material and a preparation method and application thereof. The preparation method of the sulfur-doped hard carbon material comprises the following steps: dissolving chitosan in methanesulfonic acid, and uniformly mixing; adding into diethyl ether until white powder is hydrophobically dissolved out; then removing the residual solvent in the white powder to obtain sulfated chitosan; and finally calcining the sulfated chitosan to obtain the product. A sulfur oxyacid radical molecular template method is adopted, a template is effectively anchored on a biomass chain through a chemical reaction between the template and biomass, in the subsequent high-temperature pyrolysis process, the molecular template is decomposed and self-sacrifice, sub-nano pores are reserved in situ, and effective heteroatom doping is further carried out on the surfaces of the pores. When the composite material is applied to a sodium ion battery as a negative electrode, the occurrence of electrolyte-carbon negative electrode interface side reaction can be effectively inhibited, reversible adsorption and desorption of sodium ions in a carbon matrix are promoted, and extremely high first-circle coulombic efficiency can be shown and can reach 100%.

This invention relates to the field of glycerol purification technology, specifically to a multi-stage distillation purification method for pharmaceutical-grade glycerol. Using industrially synthesized crude glycerol as raw material, the pretreated material is obtained through heating and degassing. Then, a first-stage molecular distillation removes low-boiling-point impurities, yielding an intermediate product. A second-stage molecular distillation further refines the product, collecting the gaseous glycerol fraction. Finally, under nitrogen protection, trace colored substances and residual polar impurities are removed through an adsorbent bed. After cooling, pharmaceutical-grade glycerol is obtained. Finally, the product is filtered and aseptically filled. This invention effectively removes aldehydes and ketones, residual solvents, and trace impurities from synthetic glycerol through the coupling of two-stage molecular distillation and adsorption processes. The resulting product has a purity ≥99.7%, total aldehyde and ketone impurities ≤0.005%, residual solvent ≤0.001%, bacterial endotoxin <2.5 EU / g, and batch-to-batch RSD <1%, meeting the standards for injection and suitable as an excipient in high-end pharmaceutical preparations.

The present application provides a substrate processing liquid, a substrate processing method, and a substrate processing apparatus, which have excellent drying properties and can remove liquid attached to the surface of a substrate well. In the present application, the substrate processing liquid includes a sublimable substance, a solvent that dissolves the sublimable substance, and an additive that disperses particles of the sublimable substance exceeding the solubility in the solution obtained by dissolving the sublimable substance in the solvent. Therefore, the particles of the sublimable substance exceeding the solubility are uniformly dispersed and dissolved in the solvent in the substrate processing liquid. As a result, the sublimable substance supplied to the pattern formation surface of the substrate is more than in the prior art, and there are a large amount of sublimable substances (solid phase) in the inside of the pattern. As a result, the residual solvent between patterns can be effectively suppressed, and sublimation drying can be performed in a state in which the pattern is firmly held by the sublimable substance (solid phase).

The application provides a method for reducing residual solvent of lithium bisfluorosulfonylimide, to solve the technical problems of poor removal effect of residual ester reagent in lithium bisfluorosulfonylimide and low yield in the prior art. The method comprises the following steps: (1) dissolving lithium bisfluorosulfonylimide with residual solvent in a good solvent to prepare a solution; (2) adding a first poor solvent to the solution to prepare a mixed solution; (3) evaporating the good solvent from the mixed solution under negative pressure to obtain a dispersion; (4) filtering the dispersion to remove the poor solvent and obtain a primary product; (5) washing the primary product with a second poor solvent, and filtering the second poor solvent to obtain a secondary product; and (6) performing negative pressure drying treatment on the secondary product. The method can remove the residual ester solvent in lithium salt, realizes the effect of reducing residual solvent, and has high lithium salt yield and is simple and easy to implement.

The invention discloses a refining method of medicinal guanine, and relates to the technical field of chemical medicine purification. The method comprises the following steps: complexing and dissolving a guanine crude product and a purifying reagent (such as hydrochloric acid or glacial acetic acid) in a refining solvent; concentrating or cooling to obtain a complex solid; heating and refining in a specific organic solvent (such as ethanol and methanol) to deeply remove organic impurities, ammonium salt and other impurities; and finally, neutralizing the refined complex in purified water by using alkali, separating out high-purity guanine crystals, and filtering and drying to obtain a final product. Through multi-step synergistic purification, the problems of insufficient product purity, excessive organic impurities, excessive ammonium salt, residual solvent and the like in the traditional method are effectively solved, the purity of the obtained guanine is greater than or equal to 99.9%, the ammonium salt is less than or equal to 0.001%, the guanine meets the medicinal requirements, the process conditions are mild, and the industrial production is easy.

The object of the present invention is to provide a thin film for a solid-state battery which, due to its low residual solvent content, has a less detrimental effect on the performance of the solid-state battery and can be produced by a continuous roll-to-roll coating process. The present invention relates to a thin film for a solid-state battery 100, comprising solid electrolyte particles 110 and crystalline fluororesin 120 and 130, which binds the solid electrolyte particles 110 together, wherein at least a portion 130 of the crystalline fluororesin has a fibrous form and the content of volatile components, measured by a gas analyzer, is 10 ppm by mass or less.

The invention discloses a method for preparing a dye separation membrane based on hydrogen-bond interaction and coordination of phytic acid, which comprises the following steps: putting PES, PVP, PA, NMP and formamide into a round-bottom flask, putting the round-bottom flask into a water bath kettle, stirring, standing at the same temperature to remove bubbles, then casting a casting solution on a glass plate by using a steel knife, immersing into a FeCl3 coagulating bath for soaking, and drying to obtain the dye separation membrane. And immersing the membrane in deionized water to remove the residual solvent to obtain the dye separation membrane. The preparation method comprises the following steps: by taking polyether sulfone as a membrane-forming main polymer, polyvinylpyrrolidone as a pore-forming agent, phytic acid as a surface segregation agent and N-methyl pyrrolidone and formamide as solvents, heating and stirring to form a membrane casting solution, and taking a coagulation bath as a FeCl3 solution; in the non-solvent induced phase inversion process,-PO3H2 of PA is coordinated with Fe < 3 + >, hydrophilic micromolecules are fixed on the surface of the membrane through hydrogen-bond interaction with PVP, a large number of water molecules are attracted, and a firm hydration layer is constructed on the surface of the membrane.

The application discloses a preparation method of high-light water-based aluminum silver paste self-laminating paint, relates to the technical field of paint preparation, and comprises the following steps: adding water-based resin and modified silicon resin into a high-speed dispersion kettle, preliminarily mixing the water-based resin and the modified silicon resin after stirring to form a resin base, adding organic silicon additives, a thickening agent and a pH regulator into the resin base in sequence, stirring and adjusting the viscosity and the pH value of the system, immersing a substrate to be coated in an alkali solution of hydroxyl ions to remove surface grease and a loose layer, washing the substrate with water, immersing the substrate in an acid solution of hydrogen ions for treatment, finally washing the substrate with water and drying the substrate, removing residual solvents and moisture from the cooled reflection layer by soft drying, and obtaining the water-based aluminum silver paste paint with a self-laminating structure. According to the preparation method, the high-light water-based aluminum silver paste paint with the self-laminating structure is prepared by optimizing filler modification, resin proportioning, surface treatment and heating processes, and the paint can provide excellent reflection performance, and ensure the stability, uniformity and adhesion of the coating.

The invention discloses a detection method for determining a residual solvent in gastrodin by headspace sampling-gas chromatography. The detection method comprises the following steps: (1) preparing a reference substance solution containing the residual solvent to be detected; (2) preparing a test solution containing gastrodin; and (3) injecting the reference solution and the test solution into a gas chromatograph in a headspace sampling manner, and calculating the content of the residual solvent by peak area according to an external standard method. The diluent is used for preparing a reference substance solution and a test solution, a sample is exposed in a gas phase space in a headspace sampling mode, the response of volatile substances is improved, meanwhile, all volatile low-boiling-point to-be-detected residual solvents are effectively captured and detected in a gradient chromatographic column heating mode, the detection method is simple, and the detection efficiency is high. The method has the advantages of high specificity, high precision and high sensitivity, can simultaneously detect a plurality of residual solvents to be detected, greatly saves the detection time and cost, and is beneficial to improving the quality monitoring effect of gastrodin drugs.