82 results about "Iodine solutions" patented technology

The utility model belongs to the field of salt production. In view of the problem of non-uniform mixing existing in the conventional iodizing machine, the utility model discloses a salt iodizing device which structurally comprises a mixing tank, a feeding port, a feeding port, a feeding port and a feeding port, the inclined guide plate is arranged in the mixing tank so as to divide the internal space of the mixing tank into a first cavity and a second cavity which are arranged up and down; the inclined lower side of the inclined flow guide plate is provided with a discharging opening communicating with the first cavity and the second cavity. The inclined upper side of the inclined guide plate extends to a position corresponding to the feeding hole so as to receive table salt falling from the feeding hole; the first stirring assembly is arranged in the second cavity; the spray head is arranged in the second cavity and corresponds to the discharging opening so as to spray an iodine solution to the table salt falling from the discharging opening; the iodine solution tank is connected with the spray head so as to convey an iodine solution to the spray head; a salt feeder; wherein the iodine solution tank is provided with a heating mechanism. The device can uniformly mix an iodine solution and table salt, so that the processing quality of the table salt is improved.

The utility model discloses a high-speed centrifugal flywheel for an iodine absorption instrument, and relates to the technical field of centrifugal flywheels. The flywheel comprises a main body, the main body is provided with a plurality of buffer bottle openings and a plurality of self-locking structure grooves, the buffer bottle openings are evenly distributed along the circumference of the main body, the flywheel is further provided with a buffer bottle support, buffer bottles and self-locking pieces in a matched mode, the buffer bottles are matched with the buffer bottle support, and the self-locking pieces are matched with the self-locking structure grooves. According to the utility model, the buffer bottle opening is matched with the buffer bottle bracket and the buffer bottle, so that the reacted iodine solution supernatant can be transferred to the buffer bottle, the separation of carbon black and the iodine solution is realized, and the problem that the iodine absorption value is too large along with the increase of soaking time is solved; through the cooperation of the self-locking structure groove and the self-locking piece, the buffer bottle can be fixed, and it is ensured that the electromagnet can smoothly complete the automatic cap removing action of the buffer bottle. The device is simple in structure, the accuracy of an iodine absorption value experiment is improved, and the full-automatic functionality of the experiment is enhanced.

The invention discloses a thermal cracking carbon black iodine absorption value test detection method, and relates to the technical field of material detection. The method comprises the following steps: drying thermal cracking carbon black at 125 DEG C for 1 hour to remove water, weighing 0.5 g of a sample, stirring and adsorbing with 0.04730 mol / L iodine solution at the rotating speed of 10-30 r / min for 10-30 minutes, carrying out centrifugal separation at the rotating speed of 3000-5000 r / min, ensuring that no residual carbon black exists in supernate through light transmittance detection, titrating with 0.03940 mol / L sodium thiosulfate solution, and calculating an iodine absorption value by combining a blank test. The innovation point is an exclusive drying process, dynamic adsorption-centrifugation synergy and a quantitative quality control system. The method has the beneficial effects that the detection period is shortened to be within 1 hour, the measurement error is reduced to + / -1.5%, the problems of insufficient adsorption separation and the like of a conventional method are solved, and the method is suitable for carbon black quality control in the fields of waste tire recovery and the like.

The utility model relates to the technical field of medical supply processing, in particular to an integrated assembly platform for an iodine solution protective cap. The device comprises a rotating platform, wherein a cap body adding mechanism, an iodine liquid filling mechanism, a sponge block adding mechanism and an assembly body discharging mechanism are sequentially arranged on the periphery of the rotating platform; the assembly discharging mechanism comprises a manipulator III and a transfer box; the transfer box conveys the assembled iodine solution protective caps to the falling slide way, and the falling slide way comprises a plurality of slide ways and blowing mechanisms arranged at the bottoms of the slide ways; a bottom shell stamping channel is arranged at the bottom of the falling slide way, and the falling slide way and the bottom shell stamping channel are converged and then enter the boxing assembly line through the pressing and cutting device. The iodine solution protection cap production line is compact in layout, all the mechanisms are orderly arranged around the rotating platform, space is fully utilized, the whole production line is small in occupied area and suitable for being arranged in a limited production environment, and the production speed and yield of iodine solution protection caps are remarkably improved.

The utility model discloses a tetrachlorophthalic anhydride production chlorination kettle iodine adding device, which comprises an upper iodine adding valve, a lower iodine adding valve and an iodine solution transfer tank, the iodine solution transfer tank is arranged between the upper iodine adding valve and the lower iodine adding valve, the outer side of the iodine solution transfer tank is communicated with two communicating pipes, one ends of the two communicating pipes far away from the iodine solution transfer tank are communicated with a communicating box, and the communicating box is communicated with the upper iodine adding valve and the lower iodine adding valve. The end, away from the communicating pipe, of the communicating box communicates with a pressure-regulating external pipe. The effective volume between the upper iodine adding valve and the lower iodine adding valve can be increased through the arranged iodine solution transfer tank, and the pressure difference among the upper iodine adding valve, the iodine solution transfer tank and the lower iodine adding valve is adjusted in a matched manner, so that two kilograms of iodine can be added at one time, the upper iodine adding valve and the lower iodine adding valve do not need to be repeatedly opened and closed, the operation becomes simple, the labor intensity is reduced, and the production efficiency is improved. And the iodine is added in a pressure difference manner, so that the unorganized emission of harmful gas in the kettle is avoided, the risk that the iodine is suddenly flushed out is greatly reduced, and the personal safety is guaranteed.

The invention discloses a system and a method for generating power by utilizing sulfur dioxide in boiler flue gas. The system comprises a boiler induced draft fan rear flue, a sulfur dioxide absorption module and a flue gas emission module, the method comprises the following steps: flue gas discharged from a rear flue of a boiler induced draft fan enters a first inlet of a sulfur dioxide absorption module, an iodine solution of the sulfur dioxide absorption module is sprayed out from an atomizing nozzle from top to bottom and the flue gas from bottom to top, and a filler layer is arranged between the atomizing nozzle and the flue gas inlet to increase the contact between the flue gas and the iodine solution; iodine, sulfur dioxide and water react to generate a hydrogen iodide solution and a sulfuric acid solution, and flue gas with absorbed sulfur dioxide is discharged into the flue gas discharge module from a first outlet of the sulfur dioxide absorption module. Through the closed-loop process of iodine solution absorption-hydrogen iodide decomposition-hydrogen fuel cell power generation, the limitation that only pollutant removal is concerned in the traditional desulfurization technology is broken through.

This invention discloses an integrated device and method for mercury vapor recovery and waste gas purification in amalgam brazing, belonging to the field of electronic packaging brazing and hazardous gas treatment. The device comprises a brazing sealing enclosure, a condensation unit, an iodine solution absorption unit, a sulfur absorption unit, a zinc powder absorption unit, and a safety monitoring module, connected in series. During brazing, mercury-containing waste gas is collected by the enclosure and first enters the condensation unit for pre-cooling and recovery of liquid mercury; then it enters the iodine solution absorption unit, where it reacts with iodine to generate mercuric iodide precipitate and capture silver dust; next, the residual mercury is fixed as mercuric sulfide by the sulfur absorption unit; finally, trace mercury is adsorbed by the zinc powder absorption unit. The purified waste gas is monitored in real time by a mercury concentration sensor; if the concentration exceeds the standard, an alarm is triggered and the heating platform is automatically shut down. This invention achieves a mercury removal rate of over 99.5% through four-stage synergistic purification, with emission concentrations lower than the national standard of 0.01 mg / m³. 3 It has advantages such as high purification efficiency, safety and reliability, good material compatibility, and convenient maintenance.

The present invention provides a method for recovering iodine and boric acid from iodine-containing waste liquid. The method includes: subjecting the iodine-containing waste liquid to primary acidification after pretreatment, followed by solid-liquid separation to obtain boric acid and iodine-containing solution; sequentially performing secondary acidification and oxidation on the iodine-containing solution to obtain a solid-liquid mixture containing iodine and boric acid; adjusting the pH value of the solid-liquid mixture with alkali and then performing solid-liquid separation to obtain iodine and a salt-containing solution; subjecting the iodine vapor generated during the reaction to condensation and spray absorption in sequence, and returning the condensed iodine for co-recovery. The method of the present invention first precipitates boric acid through acidification treatment according to the composition of the iodine-containing waste liquid, recovers the boric acid product, and then obtains a high-purity iodine product through further acidification and oxidation reactions; the present invention condenses and spray-absorbs the iodine vapor to avoid iodine loss and possible environmental pollution, and ensures the iodine recovery rate; the method is simple to operate, has mild conditions, low cost, and realizes the resource utilization of the waste liquid.

The invention discloses an iodinating and drying system which comprises a barrel, an iodinating mechanism, a drying mechanism and a lifting mechanism, a cavity is formed in the barrel, and a feeding end communicated with the cavity is arranged at the top of the barrel; the iodine adding mechanism comprises a spraying part, the spraying part is installed on the barrel and located at the inner top of the cavity, the spraying part can spray iodine liquid into the cavity, the drying mechanism communicates with the cavity and can convey hot air flow into the cavity, and the lifting mechanism is connected with the bottom of the barrel and penetrates through the cavity; the lifting mechanism can lift the salt at the inner bottom of the cavity to the inner top of the cavity and discharge the salt into the cavity, and the lifting mechanism can also discharge the salt in the cavity to the outside of the barrel. The problems that in the prior art, iodine liquid and salt are not mixed uniformly, and the drying efficiency of water in the iodine liquid is low are solved.

The utility model relates to the technical field of medical packaging, in particular to an aluminum-plastic packaging device for an iodine solution protective cap. The feeding combination mechanism comprises a spiral vibration disc, a conveying channel and a pressing device I; the spiral vibrating disc is used for vibrating and feeding the iodine solution protective caps to the obliquely arranged conveying channel, and the upper surface of the conveying channel is covered with a transparent acrylic plate, so that dust is prevented from invading and observation is facilitated; a falling channel is arranged below the conveying channel, the pressing device I is located below the falling channel and used for pressing a bottom shell packaging material downwards to form a bowl-shaped bottom shell, and the iodine solution protective cap falls into the bowl-shaped bottom shell from the falling channel to complete combination. According to the utility model, the structure of the falling channel is optimized, so that the iodine solution protective cap can smoothly and stably fall into the bowl-shaped bottom shell, and the continuity of a packaging process is obviously improved; and by adjusting the falling direction and arranging the positioning device, each protective cap can fall into the bottom shell in a correct posture, and the accuracy and consistency of packaging are improved.

The invention discloses a hard carbon pore distribution evaluation method which comprises the following steps: respectively putting a hard carbon sample into an iodine solution, a methylene blue solution and a caramel solution, so that the hard carbon sample in the iodine solution fully adsorbs iodine in the iodine solution, and the hard carbon sample in the methylene blue solution fully adsorbs methylene blue in the methylene blue solution; caramel in the caramel solution is fully adsorbed by the hard carbon sample in the caramel solution; obtaining an iodine adsorption value, a methylene blue adsorption value and a caramel decolorization rate after adsorption is completed; and evaluating the pore distribution condition of the hard carbon based on the iodine adsorption value, the methylene blue adsorption value and the caramel decolorization rate. According to the method, the distribution of micropores, mesopores and macropores in the hard carbon can be basically evaluated.

The utility model provides a carbon black iodine absorption value measuring device which comprises a rotating wheel disc, a magnetic stirrer, a transmission filtering device and a reaction tank, a plurality of sample cups can be placed on the rotating wheel disc, after a mixed liquid sample is stirred by the magnetic stirrer, an iodine solution and a sodium thiosulfate solution are extracted by a plunger pump, and the iodine absorption value of the carbon black is measured. In the extraction process, carbon black in the iodine solution is filtered through the filter pipe, filtrate is added into the reaction tank and chemically reacts with the sodium thiosulfate, and the iodine ion electrode in the reaction tank can judge the end point of the reaction by detecting the electron exchange capacity of the iodine solution and the sodium thiosulfate in the reaction tank when the iodine solution and the sodium thiosulfate are subjected to oxidation-reduction reaction. And meanwhile, the measured current data is transmitted to a microcomputer for automatic processing, so that accurate carbon black iodine absorption value data is obtained. The problems that manual operation is low in efficiency and the precision is greatly influenced by human factors are solved, and the advantages of high efficiency and high precision are achieved.

The application discloses an improved iodine oxidation-dimethylglyoxime spectrophotometry for detecting the content of nickel in steel, which comprises the following steps: obtaining an acidolysis solution by acidolysis of the steel to be detected; then diluting the solution to obtain a mother liquor to be detected; mixing the mother liquor to be detected with an ammonium citrate solution, water, an iodine solution, ammonia water and a dimethylglyoxime solution to obtain a chromogenic solution to be detected; and placing the chromogenic solution to be detected below a critical temperature to perform spectrophotometry to obtain the content of nickel in the steel to be detected. The application controls the adding amount of the ammonium citrate and the dimethylglyoxime in the chromogenic solution to be detected and the chromogenic temperature, so that the stable time of the absorbance of the chromogenic solution to be detected is greater than or equal to 60 minutes, the detection of the content of copper in the steel to be detected is less than or equal to 0.2%, and the probability of the result of the detection of the content of nickel in the steel to be detected (0.10%-50%) exceeding the allowable error of a navigation mark is less than or equal to 5%.

The utility model belongs to the technical field of medical instruments, and particularly relates to an injection disc sealing device for an infusion tube, which comprises an injection disc body, a rubber plug is fixedly arranged on the injection disc body, a sealing cover covering the rubber plug is mounted on the injection disc body, a sponge pad used for being stained with iodine liquid is arranged in the sealing cover, and the rubber plug is connected with the sponge pad. And when the sealing cover covers the injection disc body, the free end of the sponge pad is propped against the rubber plug. The infusion tube aims to solve the problem that an existing infusion tube is troublesome to use due to structural defects.

The invention discloses a method for testing the iodine absorption value of regenerated cracked carbon black, and belongs to the technical field of analysis and detection. Aiming at the problems of inaccuracy and instability of test data, floating of carbon black and the like when the existing national standard method is directly used for cracking the carbon black, the invention finds that the root cause of the method is that zinc sulfide widely existing in the cracked carbon black is subjected to redox reaction with an iodine solution, and floating is caused by surface organic matters. The method comprises the following steps: firstly, carrying out sample pretreatment on cracked carbon black, namely infiltrating and oscillating by using an alcohol solvent, then adding an acid solution, oscillating and pickling to remove ZnS, and then filtering, washing and drying. And measuring the iodine absorption value of the treated sample according to the standard iodine adsorption titration step. According to the method, a main interference source is eliminated through chemical pretreatment, so that a measurement result can truly and stably reflect the specific surface area characteristic of the cracked carbon black, the correlation with NSA / STSA is remarkably improved, meanwhile, the operation problem of carbon black floating is solved, and the method has the advantages of high accuracy, good reproducibility and large operation tolerance.

Assemblies, systems, and kits for use in a TTField-generating system are disclosed that include a conductive hydrogel or conductive adhesive in combination with a coating comprising, or formed from, an iodine solution. Also disclosed are methods of producing and using the assemblies, systems, and kits. Further disclosed are methods of applying an iodine solution, a conductive hydrogel or conductive adhesive, and a TTField-generating system to the skin of a subject.

The present invention discloses a vacuum circuit breaker and high-voltage power equipment, and specifically relates to the technical field of power equipment. The vacuum circuit breaker includes a box body, an upper pole, a lower pole, a vacuum interrupter, an insulating chamber, a tubular protrusion, a connecting seat, a fixing sleeve, a partition, a storage tube, a driving unit, and an opening unit. The opening unit is used to open the through-slot mouth when the storage tube moves, thereby connecting the inner cavity of the storage tube with the solution chamber. In the present invention, when cracks are generated on the surface of the vacuum interrupter, inert gas will enter the vacuum interrupter through the cracks, thereby causing the air pressure in the insulating chamber to drop, triggering the driving unit to operate, driving the storage tube to move, and at the same time, the opening unit gradually opens the through-slot mouth, allowing starch to mix with the iodine solution in the solution chamber. Through the reaction between the starch and the iodine solution, the mixed solution of the iodine solution and the starch is displayed in blue, thereby facilitating quick visual observation to determine whether the vacuum interrupter has cracks.

The utility model discloses a portable activated carbon iodine value detection device, which belongs to the technical field of detection instruments and comprises an iodine solution container, a smashing and stirring container is in threaded connection with the lower portion of the iodine solution container, a titration container is in threaded connection with the lower portion of the smashing and stirring container, and a handle is fixedly connected with the upper portion of the iodine solution container. The iodine solution container, the crushing and stirring container and the titration container are connected together through threads, so that the device integrates multiple functions, the detection process is simplified, the miniaturization of detection equipment is realized, the detection device has portability, detection personnel can conveniently carry out field detection, a sample does not need to be taken back to a laboratory for detection, and the detection efficiency is improved. The detection time is shortened, the iodine solution switch capable of controlling the outflow dosage of the solution and the baffle are arranged in the iodine solution container, accurate control over the adding amount of the iodine solution is achieved, compared with traditional adding through a dropper, operation is more convenient and faster, and meanwhile waste of the iodine solution is avoided.

The invention discloses a composite antibacterial toothpaste, which comprises a friction agent, a humectant, a thickening agent, a foaming agent, a sweetening agent, water and a bacteriostatic agent, the bacteriostatic agent comprises nano silver particles and povidone iodine, and the friction agent comprises hydrated silica, medium particle size bamboo charcoal and small particle size bamboo charcoal according to a mass ratio of 8: 0.5: 1.5. The nano-silver particles are loaded in the medium-particle-size bamboo charcoal and the small-particle-size bamboo charcoal. The two bacteriostatic agents povidone iodine and nano-silver particles are combined for use, so that the growth of microorganisms can be inhibited through different mechanisms, the povidone iodine and the nano-silver particles cover different bacteria to form a synergistic effect, and lasting antibacterial protection is provided. In addition, the friction agent with specific composition can provide a better cleaning effect, reduces potential damage to teeth and gingiva, realizes a slow release effect of a bacteriostatic agent, has an excellent antibacterial effect and good safety, and can effectively solve the problem that the antibacterial effect is reduced due to the fact that silver ions react in an iodine solution to generate precipitates.

The invention provides an iodine-carbon composite material and a preparation method thereof, and relates to the technical field of composite material preparation, the preparation method of the iodine-carbon composite material comprises the following steps: taking conidium powder to prepare fixed conidium powder, adding the fixed conidium powder into sulfuric acid for reaction, then washing, neutralizing, and freeze-drying to obtain pretreated conidium powder; the pretreated conidium powder is firstly heated and then carbonized to prepare carbonized porous conidium powder, an iodine solution is prepared, the carbonized porous conidium powder is added into the iodine solution and stirred to be uniform, then deionized water is added, and the iodine-carbon composite material is obtained through filtering and drying. The iodine-carbon composite material can inhibit generation of dead lithium and activate existing dead lithium.

A rapid evaluation method for the stability of a povidone-iodine solution relates to the technical field of detection methods, and comprises the following steps: S1, selecting a plurality of test attenuation rates of a povidone-iodine solution sample; s2, screening out samples with the attenuation rate equal to 8%, and calculating a chromatic aberration average value S1 of the samples; s3, the filter paper is placed on the clean glass surface, and the chromatic aberration average value S0 of the filter paper is calculated; s4, calculating a detection threshold value according to a formula delta1 = S1-S0 =-3; s5, calculating the average value S 'of the povidone-iodine product of which the stability is to be evaluated; S6, putting filter paper on a clean glass surface and calculating the average value S' 0 of the filter paper; s7, calculating the relative blank color difference value delta '= S'-S '0 of the sample to be detected; if delta 'is greater than-3, judging that the product is qualified; and-3, judging that the product is unqualified; and S8, judging the effectiveness of the detection in the steps S5-S7. According to the method, the stability of the povidone-iodine solution which is actually detected can be evaluated in a short time, the test period is shortened, the detection efficiency is improved, the detected data is verified through the prior art, and data support is provided for actual application.

The present invention provides a method for continuously extracting seaweed iodine solution and high-purity mannitol from dried kelp. The present invention uses kelp as a raw material. While extracting the seaweed iodine, the by-product generated by the extraction of the seaweed iodine can also be used as a raw material. The high-purity mannitol is extracted by a Soxhlet extraction combined with ultrasonic oscillation method. Therefore, while producing qualified seaweed iodine solution, the by-product mannitol can be purified and comprehensively utilized, thereby maximizing resource utilization.

The invention relates to the technical field of chemical detection data processing, in particular to an intelligent calculation method and system for an iodine adsorption value of wooden activated carbon based on a WeChat applet, and is particularly suitable for realizing rapid and accurate calculation according to the national standard GB / T 12496.8-2015 Measurement of Iodine Adsorption Value of Wooden Activated Carbon Test Method. The invention provides a WeChat applet solution for solving the problems that traditional manual calculation is low in efficiency and large in error, and an existing tool lacks national standard compliance verification and WeChat ecological integration. 1, a user clicks an applet to display a home page of a figure 1; 2, the user sequentially inputs c1: standard iodine solution concentration, c2: sodium thiosulfate solution concentration, V2: consumed sodium thiosulfate solution volume; 3, clicks to start calculation to display an iodine adsorption value A; and checking and recording a calculation result (A, mg / g). Therefore, the feeling of using the applet for the first time is that the headache, error-prone and tedious intermediate calculation steps are all hidden behind the applet, and the accurate result can be presented by only providing source data and clicking a button. Therefore, real convenience is brought by a digital tool. Quickly going to a trial bar and believing you to be amazing "what may be simple"! According to the method, through deep adaptation of WeChat ecological integration and the national standard, compliance of the whole calculation process is achieved, the calculation efficiency is improved by 80% or above, the error rate is reduced to 0.5% or below, and the method is suitable for rapid evaluation of the performance of the wooden activated carbon in the scenes of laboratories, enterprises and the like.

The utility model provides a kind of special roller mill for composite iodine solution refined iodine for aquatic products, including roller, and the inside of roller is rotationally provided with rotary plate by rotating column, and the left and right sides of rotary plate are rotationally provided with roll wheel respectively, and the upper end of rotary plate is provided with connecting frame plate, and the inside of connecting frame plate is slidably provided with sliding plate, and the left and right sides of sliding plate are provided with cleaning brush frame plate respectively, and the inside of two cleaning brush frame plates is slidably provided with multiple sliding columns, and one side surface cleaning brush plate is respectively arranged between two sliding columns adjacent to each other, and the upper end of connecting frame plate is provided with driving mechanism for driving cleaning brush frame plate to move. Through the special roller mill for composite iodine solution refined iodine for aquatic products, the iodine particles agglomerated on the roll wheel can be automatically cleaned without the intervention of operating personnel, and the discharging is carried out, which not only reduces the downtime, but also improves the crushing efficiency of solid iodine.

The invention relates to a useful method for detecting and / or quantifying any noble metal on the surface of an indium phosphide (InP) substrate, comprising at least the following steps: a) contacting the InP of said substrate with an iodine solution further comprising at least one non-iodine oxidizing agent other than hydrogen peroxide for dissolving said noble metal, if present, in said solution; b) recovering said solution having been carried out in a); c) where appropriate, repeating a) and b) with an iodine solution free of noble metal; and d) analyzing by inductively coupled plasma mass spectrometry the solution recovered in b), and where appropriate in c).

The invention discloses a rapid iodine colorimetric identification method for the retrogradation degree of rice, and relates to the technical field of plant detection, and the rapid iodine colorimetric identification method comprises the following steps: respectively processing different varieties of rice to obtain rice flour solutions of the different varieties of rice; adding an iodine solution into the rice flour solutions of different varieties of rice, and carrying out a chromogenic reaction to obtain a chromogenic solution; determining a starch iodine absorption parameter OD550 of the color developing solution; and predicting the retrogradation degrees of different varieties of rice according to the starch iodine absorption parameter OD550. According to the invention, rice varieties with different retrogradation degrees can be quickly screened.

The invention belongs to the field of molecular biology, and provides a method for DNA high-throughput synthesis, which comprises the following steps: S1, loading a solid-phase synthesis carrier: loading the solid-phase synthesis carrier on a magnetic suspension mobile platform of a synthesizer; s2, deprotection: removing protective groups on the surface of the solid-phase carrier by using a deprotection reagent; s3, cleaning is conducted; cleaning the residual deprotection reagent; s4, coupling reaction: depositing a DMT-phosphoramidite monomer, and carrying out coupling reaction; s5, oxidation: carrying out oxidation treatment on the coupled solid-phase synthesis carrier by using an iodine solution; s6, end capping: carrying out end capping protection on uncoupled sites by using a capping reagent; and S7, circulating synthesis: moving the magnetic suspension mobile platform according to a set route, and circulating the steps S1-S6 until high-throughput synthesis of the target DNA sequence is completed. According to the invention, uniform synthesis of DNA at different sites can be ensured, accurate control of the temperature in the coupling reaction stage can be ensured, and the error rate of DNA synthesis is effectively reduced.

To provide a method for producing iodine that can reduce the concentration of iodine components in wastewater generated during the production of iodine. [Solution] The method for producing iodine of the present invention includes the steps of mixing a first solution with a first oxidant solution to obtain a second solution, reducing the iodine separated from the second solution to obtain a third solution, mixing a solution containing residues of the second solution with the second oxidant solution to obtain a fourth solution, reducing the iodine separated from the fourth solution to obtain a fifth solution, and mixing the third solution, the fifth solution, and an oxidant to obtain a solution containing iodine, and crystallizing and separating iodine from the iodine-containing solution to obtain iodine, wherein the concentration of the oxidant contained in the first oxidant solution relative to the total amount of the first solution and the first oxidant solution is 3.00 mmol / L or less, and the concentration of iodine ions contained in the first solution relative to the total amount of the first solution and the first oxidant solution is 4.80 mmol / L or less.

The invention relates to the technical field of colloidal quantum dot doping, in particular to an iodine-doped preparation method of PbS colloidal quantum dots, which comprises the following steps: preparing PbS CQDs by a thermal injection method, dispersing the PbS CQDs in an n-octane solution for later use after liquid phase exchange, weighing a certain amount of iodine (I) solid, adding a proper amount of ethanol solvent, treating under ultrasonic conditions until the iodine (I) solid is completely dissolved, and drying to obtain the PbS colloidal quantum dots. The iodine-doped PbS (I) CQDs thin film is prepared by the following steps: adding a PbS CQDs solution into a quartz substrate to obtain a uniform iodine solution, dripping the PbS CQDs solution on the quartz substrate, spin-coating to form a PbS CQDs thin film, immersing the obtained thin film into the iodine solution for 30 seconds, taking out the thin film, spin-drying the thin film on a spin coater, cleaning the surface with an ethanol solution, and repeating the operation twice to finally obtain the iodine-doped PbS (I) CQDs thin film. The doping technology is simple and effective, the doping concentration is adjustable, large-scale solution phase doping can be achieved, and the doping technology is expected to be applied to PbS quantum dot material and film doping and plays an important role in PbS quantum dot photoelectric devices and electronic devices.

The invention belongs to the technical field of iodide ion extraction, and particularly discloses a method for extracting iodide ions through photo-assisted electric control ion exchange based on an oxygen vacancy type BiOI material. The working electrode is prepared from an oxygen vacancy type BiOI material; and then building a light-assisted electric control ion exchange system by using the working electrode, and performing iodide ion extraction on the iodine-containing solution by using the light-assisted electric control ion exchange system. According to the preparation method disclosed by the invention, efficient separation of photo-induced electrons and holes can be realized, meanwhile, an iodide ion migration energy barrier is reduced, the comprehensive properties of electron conduction, ion transmission and photoelectrochemistry of the oxygen vacancy type BiOI material are remarkably improved, and extraction of low-concentration iodide ions can be realized. The extraction process does not need to add a chemical extraction agent, the whole process is low in energy consumption, environment-friendly and free of secondary pollution, and a new technical path is provided for recycling of low-concentration iodide ion resources.