65results about "Chemical analysis using precipitation" patented technology

The invention relates to a sensor electrode (1) for halogen determination. Two electrode pins (2), which are connected to electrical connection components (3), project beyond an end face (40) of an electrode shaft (4). The electrical connection components (3) are arranged in the electrode shaft (4), which is produced by an injection molding process. The invention further relates to a method for producing a sensor electrode (1).

The application discloses a misaligned ten-membered cucurbituril-based assembly and application thereof in detecting and removing trinitrophenol. The assembly is assembled by using misaligned ten-membered cucurbituril and 8-hydroxyquinoline as raw materials. The misaligned ten-membered cucurbituril-based assembly is a novel supramolecular assembly, can be used for fluorescent identification of trinitrophenol in an aqueous solution, and has the characteristics of simple detection instrument, high selectivity, good sensitivity, wide detection range, fast response time, and the like. In addition, the misaligned ten-membered cucurbituril-based assembly has the characteristic of being capable of removing trinitrophenol in the aqueous solution.

The invention belongs to the technical field of battery materials, and particularly relates to a method for determining iron phosphide in a phosphate positive electrode material, the positive electrode material and application. Comprising the following steps: preparing standard solutions of a series of phosphate positive electrode materials with different iron phosphide contents; respectively collecting and purifying magnetic substances in the standard solutions, and adding a quimocilidone reagent to determine the corresponding quinoline phosphomolybdate precipitate; drawing a standard curve according to the mass of the iron phosphide and the mass of the quinoline phosphomolybdate precipitate in the standard solutions with different iron phosphide contents; preparing a to-be-detected solution, collecting and purifying magnetic substances in the to-be-detected solution, adding a quinmolybdenum citronone reagent to determine the mass of the quinoline phosphomolybdate precipitate, and calculating the content of iron phosphide in the to-be-detected phosphate positive electrode material. By means of the method, the content of trace iron phosphide in the phosphate positive electrode material can be efficiently, accurately and quantitatively analyzed, the content of iron phosphide in the phosphate positive electrode material can be quantitatively regulated and reduced, and the electrochemical performance of the phosphate positive electrode material is improved.

The utility model discloses detection equipment for aloe products, and relates to the technical field of detection equipment, the detection equipment comprises a device body, a first piston and a second bevel gear, stirring blades are movably mounted on the outer walls of the two sides of a mounting box, a mounting cover is mounted above the device body in a threaded manner, a first material pipe is mounted at the top end of the mounting cover, and a second material pipe is mounted at the bottom end of the first material pipe; a first piston is installed on the inner wall of the first material pipe, the top end of the first piston is connected with an extrusion rod, one side of the connecting pipe is connected with an alcohol tank, a second piston is installed on the inner wall of the second material pipe, and the top end of the second piston is connected with a second pneumatic telescopic rod. The double-shaft motor works to enable the second bevel gear to rotate, the second bevel gear is meshed with the first bevel gear, so that the rotating shaft drives the stirring blades to rotate at the same time, then the driving motor works to enable the worm gear to rotate, the worm gear is meshed with the worm, so that the worm drives the stirring blades to rotate, and the problem that mixing is not efficient is solved.

The invention provides a method and a kit for detecting the content of grease in yeast. The method for detecting the content of grease in yeast comprises the following steps: S1, preparing a sodium chloride solution with a series of concentration gradients; s2, sequentially adding bacterial liquid containing yeast to be detected into the sodium chloride solution, uniformly mixing, then carrying out centrifugal treatment, and after the centrifugal treatment, observing the initial suspended salinity, the middle suspended salinity and the complete suspended salinity of the yeast in the sodium chloride solution; s3, determining the grease content in the to-be-detected yeast according to the initial suspension salinity, the middle suspension salinity and the complete suspension salinity. According to the method for detecting the content of the grease in the yeast cells by using the saline water with different concentrations, the range of the content of the grease in the yeast cells, which can be detected, is about 10%-60%, the detection precision is about 10%, and the method has important significance on rapid detection of the content of the grease in industrial fermentation of the yeast.

The invention provides a method and device for detecting chlorine components in an oilfield chemical agent and application, and the method for detecting the chlorine components in the oilfield chemical agent comprises the following steps: pretreating a sample, and extracting the total chlorine components in the sample to obtain a to-be-detected solution containing the total chlorine components of the sample; mixing a potassium chromate aqueous solution with the to-be-detected solution; diluting the silver nitrate aqueous solution into a standard working solution with a concentration gradient; dropwise adding the standard working solution into the to-be-detected solution according to the concentration sequence from low to high until the color of the solution is just changed; and recording the consumption drop number of the standard working solution under each concentration so as to calculate the total chlorine component content. According to the method, a series of standard working solutions diluted by the silver nitrate aqueous solution with the concentration gradient are prepared, so that the measuring range is enlarged, the method is suitable for detecting the oilfield chemical agents with different chloride ion concentrations, and the chlorine content in the oilfield chemical agents can be rapidly detected.

The utility model discloses a kind of color smoke drawing agent sedimentation performance detection devices, it is related to performance detection technical field, including bottom plate, the bottom plate top end fixed mounting has placing block, the placing block top end is placed with sedimentation cylinder, four connecting pipes are fixedly connected with the sedimentation cylinder outside, the bottom plate top end is equipped with sliding slot, the sliding slot inside is slidably connected with sliding block, the sliding block top end fixed mounting has moving cylinder, four fixed blocks are fixedly installed in the moving cylinder inside, four The fixed block top end is placed with collection cylinder, four The collection cylinder inside top end is inserted with sealing plug, the utility model has beneficial effect as follows: through the setting of four collection cylinders, by inserting tube and inserting in the outside of connecting pipe, so that the liquid of different levels in sedimentation cylinder respectively flow into four collection cylinders, then can detect different levels of liquid, through the setting of this process, make operation more convenient, also reduce the amount of color smoke drawing agent used.

The utility model discloses a device for detecting the content of heavy metals in water, which comprises a bearing circular plate and a magnetic adsorption sheet, the center of the top surface of the bearing circular plate is provided with a connection sealing circular table, and the center of the connection sealing circular table is provided with the magnetic adsorption sheet; a transparent protective sleeve is installed on the upper portion of the bearing circular plate and the outer side of the connection sealing circular table in a sleeving mode, an operation shifting rod frame is installed in the transparent protective sleeve, an anti-slip strip is arranged on the outer surface of the top of the operation shifting rod frame, and a storage hole groove is formed in the center of the operation shifting rod frame. According to the device for detecting the content of the heavy metals in the water, water can be subsequently added according to assembly of a transparent protective sleeve, a bearing circular plate and a connection sealing circular table, meanwhile, a magnetic adsorption sheet is arranged in the center of the connection sealing circular table, and through magnetic adsorption of the magnetic adsorption sheet and a magnetic block, the whole operation shifting rod frame can be placed; and toppling in the storage process is avoided, and the whole carrying is facilitated.

The invention discloses a method for determining sulfate radicals in an ammonia chloride process electrolytic zinc solution, and relates to the technical field of solution ion content determination, and the method comprises the following steps: adding a precipitator into a sample solution to generate a barium sulfate precipitate; adding a magnesium source and a chelating agent, titrating by using a standard chelating agent solution under the condition that the pH value is 9-11 and the end point is indicated by an indicator, and measuring the volume V2 of the consumed chelating agent; taking the same amount of sample solution, indicating the end point by using the indicator under the same pH value, titrating by using the standard chelating agent solution, and measuring the volume V3 of the consumed chelating agent; carrying out a blank experiment, and measuring the volume V1 of the consumed chelating agent; and calculating the content of sulfate radicals in the electrolytic zinc sample solution according to V1, V2, V3, the volume V of the sample solution and the concentration of the standard chelating agent solution. According to the method, the influence of a zinc matrix, calcium and magnesium is quantitatively eliminated, so that the determination result is highly matched with the actual content, and the color change of a titration end point is sharper by adding a magnesium source.

An embodiment provides a method for measuring potassium in a sample, including: chelating an interferant, using an amount of sodium gluconate, in the sample; mitigating an ammonium interference, using an amount of alkali hydroxide, in the sample; and measuring, using a tetraphenylborate indicator, the amount of potassium in the sample by measuring a change in intensity of the absorbance of the chelated sample. Other aspects are described and claimed.

The invention belongs to the field of scale inhibitor performance evaluation, and particularly relates to a scale inhibitor dynamic evaluation method which comprises the following specific steps: firstly, taking an actual water sample or a configured water sample as an experimental water sample; putting the heating element into an experimental water sample, operating a water sample circulating system, and continuously supplementing scale anions, cations and a to-be-evaluated scale inhibitor into the system in the operation process; after the operation is finished, analyzing the scale sample to obtain the results of the scale inhibition rate, the dispersion rate of the scale inhibitor and the crystal form of the scale sample; and finally, re-preparing the scale inhibitor according to the results of the scale inhibition rate, the dispersion rate of the scale inhibitor and the crystal form of the scale sample, and repeating the steps 1-3 until the scale inhibition requirement is met. By analyzing the scale inhibition rate, the dispersion rate of the scale inhibitor and the crystal form of a scale sample, comprehensive and efficient evaluation on the performance of the scale inhibitor in the fields of pulping and papermaking is realized, the scale inhibitor is re-prepared according to an evaluation result, and the most suitable scale inhibitor is prepared for different water samples. Meanwhile, the invention further discloses the scale inhibitor prepared according to the result of the evaluation method.

An aluminum electrolytic capacitor electrolyte chloride ion detection heating device comprises a base, a heating seat and a supporting seat are arranged on the base, a heating beaker is placed on the heating seat, a mixing beaker is placed on the supporting seat, a sealing cover is arranged above the heating beaker and the mixing beaker, and the heating beaker and the mixing beaker are connected through a connecting pipe. An annular boss is arranged at the bottom of the heating base, first combustion heads are evenly distributed in the middle of the annular boss, an annular support is arranged on the side face of the heating base, second combustion heads are evenly distributed on the annular support and obliquely face the periphery of the bottom of the heating beaker, and a gas channel is machined in the heating base and communicated with the first combustion joints and the second combustion joints. A liquefied gas connector is arranged on one side of the heating base and communicated with the fuel gas channel. The beaker is heated through liquefied gas, meanwhile, the combustion heads are arranged at the bottom and on the periphery of the heating base, the combustion amount is large, and the efficiency is higher.

The present application provides a kind of experimental optimization method and experimental device of slurry carbonization flocculation, including sludge sampling and pretreatment, do early experiment to obtain sludge sample parameter;Set calcium-based reagent and CO2 gas experimental parameters and corresponding experimental parameters, construct experimental parameter combination and carry out carbonization flocculation experiment;Collect upper clear liquid and lower sediment to determine clear liquid index and sediment index, determine engineering performance and carbon sequestration capacity based on clear liquid index and sediment index;Quantitative and qualitative analysis of each type of experimental parameters and engineering performance, carbon sequestration capacity correlation is determined by using Pearson method, based on response surface method and qualitative analysis method, the change rule of engineering performance and carbon sequestration capacity under experimental parameter coupling is determined, to obtain the optimal experimental parameter combination.The present application can obtain the correlation rule of key parameters such as reagent content, CO2 aeration timing and aeration pressure and slurry treatment effect, provide basis and reference for construction, improve the practicability of carbonization flocculation treatment method.

The invention discloses a method for determining silicon dioxide in photovoltaic fluorine-containing high-phosphorus waste residue, which comprises the following steps: pretreating an original sample of the photovoltaic fluorine-containing high-phosphorus waste residue to obtain a sample to be treated; carrying out alkaline melting and dissolving treatment on the to-be-treated sample to obtain a to-be-detected mother solution; carrying out selective precipitation dephosphorization treatment on the mother liquor to be detected by adopting a precipitator to obtain a dephosphorization stock solution; carrying out masking interference treatment on the dephosphorization stock solution by adopting a tartaric acid solution to obtain a pretreatment test solution; carrying out a silicon molybdenum blue color development reaction on the pretreatment test solution to obtain a silicon molybdenum blue color development solution; and carrying out spectrophotometric determination and content calculation on the silicon molybdenum blue developing solution to obtain the mass fraction of silicon dioxide. The interference of high-concentration phosphorus elements in a sample matrix is effectively eliminated by treating a sample, and the content of silicon dioxide in the photovoltaic fluorine-containing high-phosphorus waste residues is rapidly and accurately measured.

To provide a method for evaluating the DAR of an ADC product that provides advantages over known methods.SOLUTION: Specifically, the method of the present disclosure can be used for a high-throughput application and / or can be used without requiring dilution of an ADC sample when the evaluation is being made.SELECTED DRAWING: None

A method for quantifying the magnesium ion amount in a soil sample, the method including: extracting calcium ions from a soil sample to produce a soil sample substantially free of calcium: mixing the substantially free calcium soil sample with ethylene glycol-bis(β-aminoethyl ether)-N,N,N′,N′-tetraacetic acid tetrasodium salt (EGTA) to produce a first sample; mixing the first sample with an indicator reagent to produce a second sample; and determining the magnesium ion amount of the second sample; wherein the indicator reagent comprises o-cresolphthalein complexone (OCPC) and tetrabutyl ammonium hydroxide (TBAH). Also, a system and a kit using the method.

The present invention relates to the technical field of water treatment agents, and specifically to a device for testing the flocculation performance of water treatment agents, which includes a graduated cylinder, a feeding mechanism, and a feeding unit. In the present invention, the feeding unit transports three equal amounts of agents to different heights in the water sample through the first cylinder, the second cylinder, and the third cylinder, and controls the three feeding points to be equidistantly arranged in the water sample to ensure that the agents are evenly put into the water sample. Secondly, the rotation of the discharging member assists in the mixing of the agent and the water sample. Through the diversion groove, the agent is gradually mixed with the water sample during the circumferential rotation of the discharging member, and gradually drives the water sample in the graduated cylinder to be dynamically mixed with the agent. In summary, the mixing effect between the agent and the water sample is improved, the accuracy of the detection result is ensured, and the slow downward diffusion of some agents caused by the top-down feeding of the agent is avoided.

The device for automatic determination of anion and / or cation levels in urine, which comprises: a) at least one sampling unit, b) at least one turbidity measuring unit, c) at least one reagent solution storage unit, said reagent solution is suitable for detecting anions and / or cations by selective precipitation reaction, d) at least a pump for delivering a reagent solution corresponding to the precipitation reaction with the specific ion, e) at least one unit for collecting and transmitting data, and f) at least one control unit, g) a housing for mounting it to a vertical supporting structure, enclosing the units and designed for urine collection, characterized in that - further comprising a human machine interface, i.e. HMI, and - the sampling unit contains at least one electromechanical unit enabling the horizontal and vertical movements of the sample vessels, and where the anion and / or cation detected in the urine is selected from Na+, K+, Ca+, Mg2+, I-, Se2-, Li+, P043- ions, and where the automatic detection is not based on enzymatic reactions, but is a urine analysis method based on precipitation.

The present invention discloses a reactor for the production of aluminum silicate, which relates to the technical field of aluminum silicate production; it includes a reaction installation member, on which a stability detection member is installed, and the stability detection member is used to detect the stability of the solution; a grading control member is installed on the stability detection member; the grading control member is used to control the precipitation of the stable solution; a clear liquid discharge member is installed on the reaction installation member; the clear liquid discharge member is used to discharge the clear liquid after precipitation; the use of the clear liquid discharge member facilitates real-time testing of the fullness of the reaction, without relying on manual use of test strips for testing, which is time-consuming and laborious, and can detect in real time whether the discharged clear liquid can continue to undergo a precipitation reaction; to solve the problems that the current reactor for the production of aluminum silicate is not convenient for real-time testing of the adequacy of the reaction, relying on manual use of test strips for testing is time-consuming and laborious, and it is not convenient to automatically control the suspension during the discharge of the precipitate.

The invention discloses a rapid detection method for carbon tetrachloride in a water-based paraffin remover and inhibitor, the rapid detection method is suitable for rapid detection of the carbon tetrachloride in the paraffin remover and inhibitor, the rapid detection steps comprise sample preparation, reagent preparation, detection stage and result determination, and the method has the advantages of rapidness and high efficiency, and can be used for rapid screening of the carbon tetrachloride in the paraffin remover and inhibitor. The method comprises the following steps: adding a fresh aluminum bromide ethanol solution into a to-be-detected water-based paraffin remover and inhibitor, keeping a water bath at 100 DEG C, and continuously stirring; if white precipitates or flocculent insoluble substances appear in the sample to be detected, it is judged that the sample to be detected contains carbon tetrachloride, and if white precipitates or flocculent insoluble substances do not appear in the sample to be detected, it is judged that the sample to be detected does not contain carbon tetrachloride. According to the method, large instruments and equipment are not needed, and rapid detection of carbon tetrachloride in the water-based paraffin remover and inhibitor can be achieved in a simple and efficient mode.

The application relates to a nuclear power plant accident solution analysis method, device, equipment and storage medium, comprising the following steps: determining the total reaction surface area of silver particles in a solution in a current period based on a first parameter of the silver particles, a second parameter of silver iodide and a solution volume in the current period; determining the generation amount of silver iodide in the solution in the current period according to the total reaction surface area of the silver particles in the solution, inherent properties, a first chemical reaction rate constant of the solution and the solution volume; determining the decomposition amount of the silver iodide in the solution in the current period according to the dose rate of a pool in a containment and a second chemical reaction rate constant of the solution; and determining the residual amount of the silver iodide based on the generation amount and the decomposition amount of the silver iodide in the solution in the current period. Compared with the result obtained by manual estimation, the application is more efficient and more accurate.

The invention belongs to the technical field of ammonium phosphate product detection, and particularly relates to equipment and a method for detecting available phosphorus and water-soluble phosphorus in an ammonium phosphate product. A first feeding trolley, a second feeding trolley and a third feeding trolley are sequentially arranged on the operation table in a matched mode. A first volumetric flask is hinged to the bottom side of the first feeding trolley; a dumping assembly is arranged on the bottom side of the second feeding trolley and comprises a beaker, a box cover matched with the drying box is arranged on the bottom side of the third feeding trolley, and a crucible type filter is arranged on the bottom side of the box cover; when the third feeding trolley transports the crucible type filter to the outer side of the drying box and the third feeding trolley and the second feeding trolley are in butt joint, the beaker and the crucible type filter are close to each other, and the dumping assembly dumps the mixture in the beaker into the crucible type filter. By efficiently connecting equipment in each determination process, the whole determination process is simpler and more convenient, and the qualified rate and the detection efficiency of ammonium phosphate analysis and detection can be greatly improved.

The utility model discloses a sewage treatment preparation detection device, and belongs to the technical field of detection device design. Comprising a first barrel; the second barrel is arranged below the first barrel and is externally connected with an air source; the upper end of the gas conveying pipe extends into the first cylinder, the lower end of the gas conveying pipe extends into the second cylinder, a plurality of vent holes are formed in the gas conveying pipe from top to bottom, the lower end of the gas conveying pipe is communicated with the interior of the gas conveying pipe, and the first cylinder is communicated with the second cylinder sequentially through the vent holes and the interior of the gas conveying pipe; and the power piece enables the air conveying pipe to reciprocate in the longitudinal direction. The device has the beneficial effects that the power piece is provided to enable the air conveying pipe to longitudinally move, the air conveying pipe upwards moves, the number of the vent holes communicating with the first barrel is increased, and the air flow is increased; the air conveying pipe moves downwards, the number of the vent holes communicating with the first barrel is reduced, and the air flow is reduced. According to the sewage treatment preparation detection device, the number of tested samples is increased, and the actual precipitation and decoloration efficiency of the preparation can be comprehensively reflected.

The invention relates to a device (1) for measuring the flocculation threshold of a colloidal medium by means of the addition of an aliphatic solvent, the device comprising: a measuring cell (10) operating by means of direct optical transmission, said measuring cell including a measuring chamber which is defined by fixed walls and intended to receive the medium inside the measuring chamber, a light transmitter (12) configured to transmit a light beam entering the measuring chamber in a transmission direction, a light receiver (14) configured to directly receive the light beam leaving the measuring chamber, optionally an optical element located between the transmitter and the measuring chamber, and a motorised movement member (16) for moving one element chosen from among the transmitter, the measuring cell and the optical element, in a direction parallel to the transmission direction; and a system (20) for managing the motorised movement member, which system is designed to adjust the volume of the measuring chamber through which the light beam passes.

The invention relates to the technical field of semiconductor materials, in particular to a heavily-doped silicon single crystal oxygen precipitation detection method which comprises the following steps: S1, pickling a complete silicon wafer; s2, spraying the atomized transition metal salt solution on the surface of the silicon wafer; s3, placing the silicon wafer in a nitrogen atmosphere of 750-900 DEG C, and keeping the temperature constant for 30-60 minutes; s4, cooling the silicon wafer to room temperature at a cooling rate of 10-20 DEG C / s; s5, removing an interference layer on the surface of the silicon wafer; s6, observing the metal decoration pattern on the surface of the silicon wafer to judge the oxygen precipitation concentration; thus, through cooperative control of the temperature and the cooling rate, the metal ions are selectively deposited only at the oxygen precipitation and the induced defects of the oxygen precipitation, so that the concentration of the oxygen precipitation is accurately and reliably revealed; meanwhile, the oxygen precipitation concentration is measured by performing metal decoration on the surface of the complete silicon wafer, so that the influence of artificial damage caused by cutting the sample on the detection result can be avoided, and the accuracy of the oxygen precipitation concentration detection result is remarkably improved.

The present invention relates to determining phase information of a fluid sample. At least one image of the fluid sample including the phase information of the fluid sample is provided. Additionally, a data driven model which comprises at least one output channel for the phase information is provided. The at least one output channel includes at least one output channel for classifying a boundary between two phases of the fluid sample, such that the phase information includes information about a property of the boundary between the two phases, such as a height, a volume, a type, or a strength of the boundary. The phase information of the fluid sample is derived based on the data driven model and the at least one image of the fluid sample including the phase information of the fluid sample.

The invention relates to the field of analytical chemistry, in particular to a method for measuring the content of phosphorus in electrolyte. The method for measuring the phosphorus content in the electrolyte comprises the following steps: pretreating an electrolyte sample to obtain a sample to be measured; adjusting the pH value of the to-be-detected sample, adding a first precipitant, and carrying out precipitation reaction and aging to obtain an intermediate product; separating the intermediate product to obtain a precipitate; the precipitate is washed with alkali, dried and weighed, and the content of phosphorus in the electrolyte is calculated according to the mass of the dried precipitate; the first precipitant comprises a magnesium ammonium mixed precipitant. According to the method, through specific sample pretreatment, precipitation condition optimization and washing steps, interference of common coexisting substances in the electrolyte is effectively eliminated, it is ensured that phosphorus is quantitatively separated out in the form of specific precipitate magnesium ammonium phosphate, and finally the phosphorus content is calculated by weighing the weight of the precipitate. The method has the advantages of high accuracy, good precision, strong anti-interference performance, low cost and easiness in popularization.

The application provides a method for testing the concentration of impurity elements in vanadium electrolyte for a vanadium redox flow battery, comprising a reduction method and an oxidation method. The method can be used to determine all metal elements of main groups and side groups contained in the vanadium electrolyte, which can be detected by an inductively coupled plasma mass spectrometer, and one or more than two of Be, Si, B, P, S, As, Se, Br, Te and I elements. The test method of the application can greatly reduce the total salt concentration of the vanadium electrolyte, which is lower than 0.2%wt, meet the sample injection requirements of the inductively coupled plasma mass spectrometer, reduce the dilution multiple of the sample injection solution, and improve the detection accuracy of the impurity elements.

The present invention specifically relates to a collection device that can be used in aerosol deposition experiments, which solves the problem of large experimental errors caused by airflow disturbances in current experiments. The present invention is used to be placed in an experimental cabin that provides a rain or snow environment, and includes a sample placement cabinet, a placement rack, a sampling tray, an electric push rod assembly, a drive assembly, a power supply and a control terminal; multiple placement racks are arranged in the sample placement cabinet to form a multi-layer structure; each placement rack corresponds to a sampling tray, and the electric push rod assembly is installed inside the sample placement cabinet. The electric push rod assembly is used to remove the sampling tray from the placement rack and move it to the outside of the sample placement cabinet when sampling, and to put the sampling tray back on the placement rack after sampling is completed, as well as to control the opening and closing of the sample placement cabinet; the output end of the drive assembly is connected to the electric push rod assembly; the output end of the control terminal is connected to the input end of the drive assembly; and the power supply is connected to the control terminal and the drive assembly respectively.