218 results about "Iodide potassium" patented technology

The invention relates to the technical field of petroleum drilling fluids, in particular to a lubricant additive and a preparation method thereof, a lubricant, a water-based drilling fluid and a preparation method thereof, the lubricant additive comprises the following raw materials: 6 parts of taurine, 30-60 parts of 1-bromohexadecane, 8.5-15 parts of potassium hydroxide, 0.5-0.9 part of potassium iodide, 30-60 parts of thionyl chloride, 2-4 parts of N, N-dimethylformamide, 7-17 parts of ammonia water and 30 parts of trichloromethane. The lubricant additive takes sulfonic acid amine as an active adsorption group, and can be stably adsorbed on a drill stem, a sleeve and a mud cake. Meanwhile, two C16 flexible chains are arranged, a compact lubricating film can be formed, and friction resistance is efficiently reduced.

The utility model discloses a potassium iodide aerosol generating device which comprises a box body, a generating structure is installed in the box body, a feeding structure is installed on one side of the box body, and the generating structure comprises a driving part, two screw rods, two synchronous wheels, a synchronous belt, a lifting seat, a nozzle, a rotating motor, a vortex disc, a water tank, an exhaust fan and a material taking opening. The utility model relates to the technical field of potassium iodide aerosol, and has the beneficial effects that by adopting the generating structure and the feeding structure, during operation, a potassium iodide solution in the liquid storage tank can be fed into the nozzle through the peristaltic pump and is sprayed out through the nozzle; then, the rotatable vortex disc is matched to realize the potassium iodide aerosol generation operation, the generated potassium iodide aerosol can be fed into the collecting cavity to be collected and stored, meanwhile, the position of the nozzle can be adjusted through the matching of the driving part, the screw rod and the lifting seat, and the overall operation has the characteristics of simple structure, convenience in operation and adjustment and the like.

The invention discloses a crown ether functionalized covalent organic framework material as well as a preparation method and application thereof, and the method comprises the following steps: adding a covalent organic framework material, 4-bromobenzo-15-crown-5, potassium carbonate and potassium iodide into an acetone solution for reaction, washing the obtained crude product, performing Soxhlet extraction with tetrahydrofuran for a certain time, and drying to obtain the crown ether functionalized covalent organic framework material. The crown ether functionalized covalent organic framework material is obtained. Compared with a synthesis method of crown ether functionalized COFs in the prior art, the method has the advantages that the crown ether (4-bromobenzo-15-crown-5) can be grafted to the COFs in one step, the Na < + > adsorption capacity and the adsorbent recycling performance are greatly improved, the synthesis method is simple, and synthesis of the crown ether functionalized COFs is greener, more convenient and more economical.

The invention relates to the technical field of Abell stability test equipment, and discloses an automatic device suitable for an Abell stability test. The test tube rack assembly, the first clamping mechanism, the second clamping mechanism, the pipetting mechanism and the constant-temperature heating mechanism are installed on the workbench, the test tube rack assembly is used for containing test tubes, the first clamping mechanism is used for clamping the test tubes in a releasable mode and moving the test tubes into the constant-temperature heating mechanism, and the second clamping mechanism is used for clamping a test tube rack in a releasable mode and moving the test tubes into the constant-temperature heating mechanism. The lower end of the test paper rack is used for connecting potassium iodide starch test paper, and the pipetting mechanism is used for sucking nitroglycerin and a glycerin aqueous solution and respectively filling the nitroglycerin and the glycerin aqueous solution into the test tube and the potassium iodide starch test paper; the monitoring mechanism is used for monitoring color change of the potassium iodide starch test paper; and a control unit. According to the invention, the automatic test process of the Abell stability test can be realized.

The invention relates to a multi-element compound corrosion inhibitor for offshore CO2 oil displacement as well as a preparation method and application of the multi-element compound corrosion inhibitor. The invention relates to a multi-element compound corrosion inhibitor for offshore CO2 oil displacement, which is characterized by comprising 8 to 10 weight percent of oleic acid imidazoline quaternary ammonium salt, 8 to 10 weight percent of oleic acid imidazoline lauric acid amide, 4 to 6 weight percent of potassium iodide, 4 to 6 weight percent of octylphenol polyoxyethylene ether, 4 to 6 weight percent of dodecyl dimethyl tertiary amine, 4 to 6 weight percent of assistant A, 4 to 6 weight percent of assistant B and the balance of absolute ethyl alcohol. According to the multi-element compound corrosion inhibitor for offshore CO2 oil displacement as well as the preparation method and the application of the multi-element compound corrosion inhibitor, the multi-element compound corrosion inhibitor contains a plurality of components and can effectively inhibit CO2 corrosion at a high temperature.

A nanotag includes a gold core, the gold core is sequentially coated with a silver shell and a gold shell, and a Raman dye is arranged between the silver shell and the gold shell; further it discloses a making method for a high-stability SERS nanotag that includes the following steps: a. adding tetrachloroauric acid into ultrapure water, after boiling, quickly adding trisodium citrate, continuously boiling for a few minutes, stopping heating, and cooling; b. adding hexadecyl trimethyl ammonium chloride (CTAC) into product obtained in the step a, stirring, and then adding ascorbic acid and AgNO3, and centrifugating and resuspending in the CTAC; c. adding CTAC into product obtained in the step b, stirring, adding a Raman dye, ascorbic acid and sodium hydroxide, injecting a mixture of tetrachloroauric acid and potassium iodide, and centrifuge the mixture and resuspending in the CTAC.

The invention discloses a method for regulating and controlling the dichroism of a polyvinyl alcohol polarizing film, and belongs to the technical field of high polymer material processing.The method comprises the steps that a polyvinyl alcohol film is swelled by selecting proper steps and technological parameters; immersing the swelled polyvinyl alcohol film in iodine, potassium iodide and boric acid solutions for dyeing; immersing the dyed polyvinyl alcohol film into a boric acid solution for crosslinking; stretching the cross-linked polyvinyl alcohol film in a potassium iodide and boric acid solution; the stretched polyvinyl alcohol film is put into a color complementing bath for color complementing, and the dichroism of the high-gloss film is improved by adjusting the type of a reducing agent in the color complementing stage; and finally, drying the polyvinyl alcohol film after color complementing. The preparation method is simple, raw materials are easy to obtain, and the cost is low.

The invention relates to the technical field of photovoltaics, in particular to a method for recovering metal lead in a perovskite component, which comprises the following steps: crushing the perovskite component to be recovered into a size of 2-3cm, soaking in a recovery solution, fully stirring and filtering to obtain a first filtrate; standing the first filtrate, and separating to obtain a second filtrate; adding alkali liquor into the second filtrate until lead ions in the second filtrate are completely precipitated, and filtering to obtain lead hydroxide precipitate and third filtrate; adding a silver nitrate solution into the third filtrate, and filtering to obtain a silver halide precipitate; and washing the obtained lead hydroxide precipitate with deionized water to be neutral, completely dissolving the lead hydroxide precipitate with an acid solution to obtain a high-purity lead-containing solution, carrying out halogen replacement with potassium iodide to obtain a lead iodide precipitate, filtering and drying the lead iodide precipitate, and reusing the lead iodide precipitate for preparing a perovskite solution. According to the method, the use of a large amount of organic solvent is reduced, the method is more environment-friendly, the health of workers is not harmed, the recycled lead iodide is reused for preparing the perovskite solution, and the method has higher economic value.

The invention relates to the technical field of potassium iodide preparation, in particular to a cyclic preparation method which comprises the following steps: in an oxidation-reduction reaction system containing elemental iodine, potassium hydroxide and potassium formate, carrying out an oxidation-reduction reaction at a first temperature to obtain an oxidation-reduction reaction solution; adding a precipitant, carrying out precipitation reaction at a second temperature, and carrying out solid-liquid separation on the obtained reaction liquid to obtain a potassium iodide solution; carrying out evaporation concentration, cooling crystallization and solid-liquid separation on the potassium iodide solution to respectively obtain potassium iodide crystals and potassium iodide mother liquor, and adding the potassium iodide mother liquor into a redox reaction system; according to the mode, the potassium iodide is formed by adopting an oxidation reduction mode, the potassium iodide can be obtained by carrying out one-time reaction in one reaction system, then impurities are removed by utilizing the precipitant, only solid impurities and a solvent evaporated in the evaporation and concentration step leave the reaction system in the whole reaction process, and the cyclic utilization of raw materials is realized; the utilization rate of raw materials is improved.

Iodized micellar casein is produced by adding, to an aqueous solution of micellar casein, crystalline potassium iodide at a ratio of 1:7-1:9; holding the mixture for 5-10 minutes; adding to the mixture crystalline potassium persulphate at a ratio of 1:8-1:12 crystalline potassium persulphate to micellar casein mass; holding the mixture for 4-8 hours at a temperature of 18-25°С and a pH of 6.5-8.9 while constantly monitoring the molecular iodine content of the solution and periodically adding portions of crystalline potassium persulphate at a ratio of 1:12-1:24 crystalline potassium persulphate to micellar casein mass to continue the iodination reaction; removing residual inorganic salts from the resulting aqueous solution by microfiltration and diafiltration, followed by sterilizing microfiltration and freeze drying or spray drying. The method makes it possible to produce iodized micellar casein that is suitable for creating products for preventing iodine deficiency and optimizing iodine metabolism and for preventing and protecting against radiation poisoning.

The invention relates to a synthesis method of low-cost environment-friendly dioscorea element I. The synthesis method comprises the following steps: by taking 3, 5-dimethoxybenzyl alcohol as a raw material, brominating, reacting with triethyl phosphite and 4-benzyloxy-3-methoxybenzaldehyde to generate 3, 4 ', 5-trimethoxy-3'-benzyloxy stilbene, carrying out ultraviolet cyclization reaction, reacting with palladium-carbon, palladium-carbon, palladium-carbon, palladium-carbon, palladium-carbon, palladium-carbon, palladium-carbon, palladium-carbon, palladium-carbon, palladium-carbon, palladium-carbon, palladium-carbon, palladium-carbon, palladium-carbon, palladium-carbon, palladium-carbon, palladium-carbon, palladium-carbon and debenzylating with hydrogen to obtain the Chinese yam element I. The potassium iodide is used as the catalyst in the ultraviolet lamp irradiation catalytic ring closing reaction, the pure water is used as the detergent, compared with the method adopting iodine as the catalyst and adopting a sodium thiosulfate aqueous solution as the detergent, the product yield of the compound 33-4 is 75%, the yield of the compound 33-5 is 16.6%, the purity is 98.7%, and the method has the advantages of low cost, high yield, few impurities and the like.

The invention discloses a proton exchange membrane hydrogen production electrolysis catalyst and a preparation method thereof.The preparation method comprises the following steps that S1, iridium precursor salt and ruthenium precursor salt are dissolved in water, and a solution A is obtained; s2, a triblock copolymer P123 is dissolved in ethyl alcohol, and a solution B is obtained; s3, dissolving potassium iodide in water to obtain a solution C; s4, uniformly mixing the solution A, the solution B and the solution C, transferring into a reaction kettle, and heating for reaction; and S5, collecting the product obtained in the step S4, and centrifuging and washing to obtain the iridium ruthenium alloy catalyst. According to the invention, a solvothermal reduction method is adopted, a triblock copolymer P123 is taken as a reducing agent and a protective agent, ethanol is taken as a solvent, and potassium iodide is added to improve the size and crystallization degree of the catalyst, so that the iridium-ruthenium alloy catalyst with high catalytic activity and high stability is obtained.

The present disclosure discloses a thermochromic copper iodide organic hybrid luminescent material and a preparation method thereof. The chemical formula of the thermochromic copper iodide organic hybrid luminescent material is Cu4I6C 18 H 30 N4; The preparation method includes the following steps: preparing 4-dimethylamino-1-ethylpyridinium iodide; reacting a methanol solution containing 4-dimethylamino-1-ethylpyridinium iodide with a potassium iodide solution containing cuprous iodide to obtain solid M; centrifuging, washing, and drying solid M to obtain the thermochromic copper iodide organic hybrid luminescent material. Single crystals of the thermochromic copper iodide organic hybrid luminescent material are prepared by the slow diffusion method. The thermochromic copper iodide organic hybrid luminescent material of the present disclosure has the characteristics of high fluorescence quantum yield, high stability, and thermochromism.

The present application provides a kind of hair care composition containing potassium iodide and its preparation method, the hair care composition includes A agent and B agent;The A agent includes 5,6-dihydroxyindole, potassium iodide, arginine, propylene glycol, sodium sulfite, ascorbic acid, xanthan gum and water;The B agent includes sodium laureth sulfate, potassium peroxodisulfate, cocamidopropyl betaine, disodium lauroyl glutamate, decyl glucoside, cocamide MEA, guar hydroxypropyltrimonium chloride, sodium chloride, citric acid, disodium EDTA, essence and water.The present application improves the stability of 5,6-dihydroxyindole by using potassium iodide mixed with 5,6-dihydroxyindole, improves the problem that dyeing effect is not obvious, uneven, dyeing is not persistent, and there is no risk of damage to hair and scalp by strong alkaline substances, avoids using benzidine substances with high carcinogenic and sensitizing risk, and the hair dyeing effect is more persistent, more mild, and safer.

Aspects of the present disclosure are directed towards a method for producing an activated carbon / bismuth oxy-iodide nanocomposite. The method includes heating a glycol solution including Bi(NO3)3·5H2O and activated carbon to 100° C. The method includes heating a glycol solution includes potassium iodide to 100° C. The method includes adding the glycol solution including Bi(NO3)3·5H2O and activated carbon and the glycol solution including potassium iodide to a reaction vessel including a solvent to form a reaction mixture. The method includes chilling the reaction mixture to ambient temperature. The method includes filtering the reaction mixture to obtain the activated carbon / bismuth oxy-iodide nanocomposite.

Aspects of the present disclosure are directed towards a method for producing an activated carbon / bismuth oxy-iodide nanocomposite. The method includes heating a glycol solution including Bi(NO3)3·5H2O and activated carbon to 100° C. The method includes heating a glycol solution includes potassium iodide to 100° C. The method includes adding the glycol solution including Bi(NO3)3·5H2O and activated carbon and the glycol solution including potassium iodide to a reaction vessel including a solvent to form a reaction mixture. The method includes chilling the reaction mixture to ambient temperature. The method includes filtering the reaction mixture to obtain the activated carbon / bismuth oxy-iodide nanocomposite.

The invention discloses a high-stability povidone-iodine preparation, including polyvinylpyrrolidone K30 15.0%-25.0%, refined iodine 10.0%-12.0%, ethanol 20.0%-30.0%, potassium iodide 2.0-4.0%, organic acid 0.1-1.0%, organic acid salt 0.1-2.0%, surfactant 1.0%-3.0%, stabilizer 1.0%-5.0%, and the rest is water. Compared with the prior art, the invention has the beneficial effects that the povidone-iodine preparation obtained by the invention has good stability, low reaction temperature during the reaction, short total reaction time (only 4h-6h), high iodine yield (low degradation rate), can improve production efficiency, and reduce production energy consumption.

The invention discloses a preparation method of a difluoromethyl reagent and application of the difluoromethyl reagent in synthesis of a nickel-catalyzed alkyl difluoromethyl compound. The preparation method of the difluoromethyl reagent comprises the following steps: in an inert gas atmosphere, adding potassium iodide, cuprous iodide and a water-containing dimethylformamide solution into a reaction container, heating, dropwise adding difluorochloroacetic acid of DMF (Dimethyl Formamide) into a reaction system, collecting difluoroiodomethane, and supplementing a 1-methyl-2-pyrrolidone NMP (N-Methyl Pyrrolidone) solution into the system. The invention provides a difluoromethyl reagent which is simple and convenient to operate, low in cost, high in yield, environment-friendly and beneficial to large-scale preparation and application of the reagent in synthesis of difluoromethyl substituted alkane compounds.

The invention relates to a preparation method of a nano silver halide emulsion, which comprises the following steps: S1, fully dissolving deionized water, sodium bromide, a nucleating aid, a stabilizer and gelatin in a container with disc type stirring, and uniformly mixing to prepare a primary glue solution; uniformly mixing silver nitrate with deionized water to prepare a silver nitrate solution; uniformly mixing sodium bromide, potassium iodide and deionized water to prepare a halogen solution; s2, at a certain temperature, injecting a prepared silver nitrate solution and a halogen solution into the primary glue solution at the same time to obtain a mother solution containing nano silver halide; and S3, desalting the mother liquor containing the nano silver halide, supplementing glue, and sensitizing to obtain the nano silver halide emulsion. The nucleating aid and the stabilizer are added into the gelatin aqueous solution, the prepared nano silver halide particles are uniform, stable in storage and free of aggregation, and the emulsion can be desalted at normal temperature, is low in energy consumption and high in production efficiency, and is beneficial to continuous production.

The invention provides a quantum dot doped reduced graphene oxide film and a preparation method thereof, and belongs to the technical field of composite materials. The preparation method comprises the following steps: heating citric acid, phytic acid and 3-aminophenylboronic acid to react to prepare P / B / N co-doped graphene quantum dots, loading a lanthanum element, modifying the surface by a silane coupling agent with an epoxy group, reacting with an aniline tetramer to prepare a compound, adding the compound into a graphene oxide aqueous dispersion, carrying out suction filtration, soaking in a potassium iodide-hydrochloric acid solution, heating, carrying out a sealed reaction, and washing to obtain the lanthanum-doped graphene quantum dots. And drying to obtain the quantum dot doped reduced graphene oxide film. The quantum dot-doped reduced graphene oxide film prepared by the method has relatively good hydrophilicity and conductivity, so that the degree of order of the film is improved, the wet-induced power generation performance is improved, the performance is not attenuated after long-time operation, the service life and the storage life are long, and the quantum dot-doped reduced graphene oxide film has a wide application prospect.

The utility model discloses a potassium iodide production and generation device which comprises a frame body, a reaction kettle is arranged on the lower side of the frame body, a heating bin is installed at the top of the frame body, electric heating pipes are embedded in the inner walls of the two sides of the heating bin, a stirring motor is installed at the top of the heating bin, and stirring blades are arranged in the heating bin. The utility model relates to the technical field of potassium iodide production, and has the beneficial effects that according to the technical scheme, the frame body is adopted as a main body, solid iodine is heated through the heating bin and is changed into a molten state, and the stirring blades are arranged on the frame body; then the iodine solution in the molten state can be fed into the transfer bin through the air pump, after the transfer bin is filled with the iodine solution, the iodine solution can be rapidly fed into the reaction kettle through cooperation of the exhaust fan and the atmospheric pressure, the iodine solution reacts with potassium oxide and water, and the device has the advantages of being simple in structure, convenient to meter and the like.

The invention discloses a method for preparing high-purity indium from refined indium, and belongs to the technical field of metallurgy. The refined indium is distilled for three times, low-boiling-point impurities Cd, Zn, As, Pb and Bi can be separated and purified, then glycerin, potassium iodide and iodine are used for heat treatment, the Cd impurity can be further separated from indium, then glycerin, ammonium chloride and zinc chloride are used for heat treatment, and the high-purity indium is obtained. According to the method, the Tl impurity can be separated from indium, finally, sodium hydroxide and sodium nitrate are used for heat treatment, Sn, Pb and Fe can be separated from indium, refined indium can be effectively purified through the method, the refined indium is prepared into high-purity indium, the purity of the high-purity indium is 6N, and the content of single impurity metal elements Sb, Sb, Pb and Bi can meet the 7N ultra-high-purity indium metal standard.

The invention relates to the technical field of potassium iodide preparation, in particular to a preparation method of potassium iodide, which comprises the following steps: firstly, adding a reduction solution into an iodine solution to carry out a first reaction to obtain a first reaction solution, then, carrying out solid-liquid separation on the first reaction solution to obtain a first reaction filtrate, and adding a potassium hydroxide solution into the first reaction filtrate to carry out a second reaction to obtain a second reaction solution; finally, carrying out solid-liquid separation on the second reaction liquid to obtain a potassium iodide solution; a mixed solution of potassium hydroxide and potassium formate is added into an iodine solution for a first reaction, and elemental iodine is reduced into iodide ions by using formate under an alkaline condition, so that the difficulty of generating elemental iodine by reaction of iodate ions and iodide ions is improved, the iodine leakage phenomenon is reduced, and the purity of potassium iodide is improved; meanwhile, the technological process is simple, and operation is convenient.

The invention discloses a fully continuous flow preparation method of 4, 5-diiodine-1H-imidazole, and belongs to the technical field of synthesis and preparation. The method comprises the following steps: S1, simultaneously conveying an imidazole-containing sodium hydroxide aqueous solution, an iodine-containing elementary substance and a potassium iodide aqueous solution into a micro-mixer and a continuous flow coil reactor, and carrying out a continuous synthesis reaction to obtain a 4, 5-diiodine-1H-imidazole reaction solution; and S2, dropwise adding an acetic acid solution into the 4, 5-diiodine-1H-imidazole reaction solution to neutralize, separating out a solid product, washing with ice water, filtering and drying to obtain a 4, 5-diiodine-1H-imidazole solid. The fully continuous flow reaction technology system provided by the invention has excellent mass transfer and heat transfer performance, greatly enhances mixing among material molecules, greatly shortens the reaction time, and improves the reaction efficiency. The reaction time is shortened to more than ten seconds from more than ten hours of the traditional intermittent kettle reaction; meanwhile, the side reaction is inhibited, and the product quality of the 4, 5-diiodine-1H-imidazole (I) is improved.

The invention relates to a bioluminescence detection technology and a kit. The invention particularly discloses a renilla luciferase reporter gene detection kit which comprises a buffer solution and a detection substrate, and the buffer solution comprises Tris, potassium iodide, sodium sulfite, TCEP, a reducing agent and a surfactant. The prepared renilla luciferase reporter gene detection reagent has the advantages of high luminous intensity, low background and long luminous duration. When the renilla luciferase detection reagent is used, extra operation such as removal of a culture medium is not needed, and the expression level of renilla luciferase in cells can be rapidly detected.

A polyamide-based resin melt obtained by melt-kneading a base resin, an organic compound-based additive (A), and an iodide-based additive (X) is granulated to prepare polyamide-based resin particles. The polyamide-based resin particles are expanded by using a physical blowing agent to produce polyamide-based resin expanded beads. The polyamide-based resin expanded beads are in-mold molded to produce a polyamide-based resin expanded molded article. The organic compound-based additive (A) is made of a hindered phenol-based compound and / or an organophosphorus-based compound. The iodide-based additive (X) is made of copper iodide, or copper iodide and potassium iodide.

The invention discloses luminous ink for preparing a scintillation layer and a preparation method and application of the luminous ink. The preparation method comprises the steps that cuprous iodide is dissolved in a saturated potassium iodide aqueous solution, hypophosphorous acid is added, and a first mixed solution is obtained; adding the first mixed solution into a polyvinylpyrrolidone solution to obtain a second mixed solution; the preparation method comprises the following steps: dissolving phenyl trimethyl ammonium iodide in a mixed solution of ethanol and acetonitrile to obtain a phenyl trimethyl ammonium iodide solution; quickly mixing a phenyltrimethylammonium iodide solution with the second mixed solution, stirring for a period of time, centrifuging and washing to obtain nano-particles, and dispersing the nano-particles into a solvent; metal copper-based halide nanoparticles are prepared at room temperature by using a single-component solution method, and then the metal copper-based halide nanoparticles are dispersed into a solvent to obtain the luminous ink. And then the luminous ink is uniformly sprayed on a selected substrate, and the thickness and the area can be freely adjusted according to requirements, so that a high-resolution scintillation layer is prepared.

The invention relates to a wafer-level gold etchant which is characterized by being prepared from the following raw materials in percentage by weight: 8-12% of a sodium thiosulfate solution, 28-32% of a thiourea solution, 8-12% of a potassium ferricyanide solution and 48-52% of a potassium iodide solution. The wafer-level gold corrosive liquid disclosed by the invention has the advantages that the wafer-level gold corrosive liquid can be widely applied to a circuit which has a gold film layer thickness of more than 0.5 mu m and has a relatively high requirement on sidetrack control, so that the problems of overlarge sidetrack, line CD (Compact Disc) over-limit and even metal falling caused by corrosion of the original gold corrosive liquid are avoided. When the wafer-level gold etching liquid is used for etching, smaller sidetracking is achieved, a process window is wider, process compatibility is better, and process support is provided for high-speed and high-power photoelectric semiconductors and micro-system devices.

The utility model relates to a device for detecting the content of sodium persulfate in copper dissolving liquid and a water electroplating device, and the detection device comprises a detection container, a silver ion selection electrode, a controller and a copper ion concentration detection component, the first conveying part is used for conveying copper dissolving liquid, the second conveying part is used for conveying silver nitrate standard liquid, the third conveying part is used for conveying potassium iodide standard liquid, at least the silver ion selection electrode and the second conveying part are electrically connected with the controller, and the silver ion selection electrode is arranged in the detection container and used for detecting silver ions in the detection container. The silver ion selection electrode transmits a detection signal to the controller, and the controller is used for controlling starting and stopping of the second conveying part according to the received signal; the measuring method is simple and reliable, the content of the sodium persulfate in the copper dissolving liquid can be effectively detected, the concentration of the sodium persulfate in the copper dissolving tank in the water electroplating device can be monitored in real time, the sodium persulfate is supplemented into the copper dissolving tank in time, and the copper dissolving capacity of the copper dissolving liquid in the copper dissolving tank is guaranteed.

Provided are: a plasma preparation that has a reduced complement value and in which mixed viruses have been inactivated while maintaining the biological activity of plasma; and a method for producing the plasma preparation. The method includes: (1) a step for subjecting plasma to a solvent / detergent treatment (S / D treatment); and (2) a step for irradiating the S / D treated plasma with ultraviolet rays having a central wavelength of 200-260 nm from an LED light source for 10 minutes or longer such that the value of ΔA352, which corresponds to the cumulative irradiation amount and is converted by a 1% aqueous potassium iodide solution, is 0.2-0.7. The plasma preparation has a complement value (CH50) of less than 25 CH50 / mL.