1243results about "Chemical analysis using titration" patented technology

The invention belongs to the technical field of physical and chemical analysis, and particularly discloses a high-precision full-automatic titration system and method based on fusion of a spectrum sensor and a PLC, a multi-channel spectrum sensor is adopted to capture fine spectrum characteristics of solution color change in real time, and the flow rate of titration liquid is dynamically adjusted through a PLC embedded PID control algorithm, so that the titration accuracy is improved. The method realizes submilliliter-level precision control, constructs a real-time compensation mechanism in combination with temperature, humidity, pH and other environmental parameters, improves the accuracy and robustness of titration end point judgment, automatically updates an end point judgment threshold and control parameters in combination with an AI self-learning module, realizes self-adaptive adjustment and sustainable evolution of the system, and improves the accuracy and robustness of titration end point judgment. The device has the characteristics of modular structure, high detection precision, high control response and high operation stability.

The invention relates to the field of optical nondestructive testing, and discloses a visualization method for detecting mango quality based on hyperspectrum, which comprises the following steps of: firstly, selecting mango samples, and simulating different mango ripening stages by dividing the mango samples into a plurality of groups of samples; acquiring a high-dimensional spectral image by using a hyperspectral imaging system, and measuring the hardness, the soluble solid content and the titratable acid content; correcting and extracting the high-dimensional spectral image to obtain and optimize the average reflection spectrum of the sample, and establishing a mango maturity classification model and a quality regression prediction model; performing characteristic wavelength contribution degree analysis and screening, and optimizing a quality regression prediction model by adopting a key wave band; the method is applied to each pixel point of a high-dimensional spectral image, a two-dimensional distribution diagram is generated, and mango quality visualization is achieved. The method solves the problems that in the prior art, rapid and lossless judgment of the mango ripening stage cannot be achieved, accurate prediction and visual distribution of key internal quality indexes cannot be achieved, and intelligent grading and quality control of picked fruits are not ideal.

The invention relates to a soil detection system and a detection method. Soil detection equipment comprises a sampling module, a positioning module for generating original point sampling coordinates, a sample treatment module for chemical, electrochemical and biological treatment means, a detection module, a detection database, a detection control module, a generating and sending module and a sending and receiving module. The detection method comprises the steps of sampling and processing, binding coordinates, comparing abnormal data through preliminary detection, generating a pollution map, carrying out secondary detection on abnormal data, calculating a spatial uncertainty index, dynamically generating a near-origin secondary sampling coordinate, circularly sampling and detecting until the index reaches the standard or the density upper limit, and finally generating the pollution map and a prediction model. And the detection database is updated and optimized through machine learning.

The invention relates to the technical field of titrimetric analysis automation, in particular to an intelligent titrimetric analysis system based on artificial intelligence, which comprises an error identification module, a temperature adjustment module, a viscosity compensation module, a flow adjustment module and a bubble correction module. In the invention, by independently quantifying the error and identifying the key parameter offset in real time, the data reliability in the titration process is obviously improved, the error interference is reduced, the temperature change is dynamically adjusted and coped, the reagent viscosity and flow fluctuation are adjusted in real time, and the bubble interference and density offset are identified and corrected; the accuracy and the consistency of the test in various environments are ensured, the adaptability, the stability and the repeatability of titration analysis are improved, and a high-precision and traceable experiment result is ensured.

The invention discloses an instrument for detecting sulfur dioxide residue in traditional Chinese medicine, and relates to the technical field of traditional Chinese medicine detection, the instrument comprises a main machine, and also comprises a distillation flask arranged at the top of the main machine and used for containing a sample to be detected; the condensation assembly is arranged at the top of the distillation flask and comprises a condensation pipe and a sleeve, and the sleeve is fixedly arranged in the condensation pipe and divides the condensation pipe into a water passing cavity and a condensation cavity. The condensation cavity is divided into the upper condensation section and the lower condensation section through the separation part, heat can be effectively prevented from spreading to the whole condensation cavity, a certain temperature difference is kept between the upper condensation section and the lower condensation section, it is ensured that gas subjected to primary condensation can be effectively condensed on the upper condensation section, and therefore the condensation effect on distilled gas is improved; the hydrochloric acid component doped in the gas can be further reduced through twice condensation, the hydrochloric acid component is prevented from entering the absorption bottle along with nitrogen and sulfur dioxide to influence the absorption liquid, and the detection accuracy is improved.

The invention relates to the technical field of acidic wastewater titrimetric analysis, and discloses an automatic sampling titrimetric analysis method based on a copper smelting acidic wastewater treatment link, which comprises the following steps: collecting waste acid to obtain a waste acid sample; carrying out titration treatment on the waste acid sample to obtain a waste acid sample image after the titration reaction is finished, and carrying out sediment outline extraction on the waste acid sample image to generate sediment coagulation complexity; according to the method, automatic sampling titration is combined with image analysis, precipitation coagulation complexity and arsenic specific hue separation degree are extracted, a precipitation effectiveness index and an arsenic residue risk coefficient are generated through dynamic fusion, arsenic precipitates and other precipitates in similar forms are accurately distinguished by utilizing precipitate contour features and arsenic specific hue in an HSV color space, and the arsenic content is accurately determined. The method has the advantages that spectral signal superposition interference is avoided, and the arsenic residual state can be accurately reflected, so that whether arsenic removal is qualified or not is reliably judged, the accuracy and safety of waste acid treatment are improved, and the quality of water reuse is guaranteed.

The invention discloses a comprehensive circulating water analyzer based on a titrimetric analysis method, and belongs to the technical field of power plant water treatment. The analyzer is composed of a multi-channel titration module, an intelligent temperature control reaction kettle, an optical detection array and a central processing system, and through an integrated electrode-optical composite sensing technology, a dynamic temperature compensation algorithm and a deep learning end point prediction model, the problem that in traditional circulating water detection, the multi-parameter measurement precision is low (the error gt; 2%), the anti-interference capability is poor (the turbidity is gt; the innovation points comprise (1) a three-axis linkage microtitration mechanism (the precision is 0.1 microliter) and an anti-crystallization needle head design are combined to improve the reagent feeding stability by 50%, (2) a double-layer eddy current temperature control reaction system (the temperature control precision is + / -0.1 DEG C) and eliminate the interference of temperature fluctuation on the titration reaction, and (3) a transfer learning-based end point prediction algorithm (error 1t, error 1t, error 1t, error 1t, error 1t, error 1t, error 1t, error 1t, error 1t, error 1t, error 1t, error 1t, error 1t). The device can synchronously detect eight indexes such as pH, Cl, SO, total hardness and the like, supports remote monitoring and automatic dosing of chemicals, is suitable for real-time monitoring of circulating cooling water of a power plant, the detection precision reaches + / -0.3%, and the single detection time is 1t, 2.5 minutes.

The invention discloses a water quality total hardness and calcium and magnesium ion content detection method, which comprises: extracting a water quality sample to be detected, and injecting into a cuvette; taking a color developing reagent, injecting the color developing reagent into the cuvette, blowing, stirring and uniformly mixing to obtain a reaction solution; measuring the initial current i0 of the reaction liquid in the cuvette at the wavelength of 475nm and the initial current I0 of the reaction liquid in the cuvette at the wavelength of 640nm; then titrating, and recording a measured current value and a titration volume while titrating; according to the obtained relation curve of the current and the titration volume under the two wavelengths, obtaining the titration volume corresponding to a titration judgment end point, and substituting the titration volume into the calibration curve to obtain the concentration of total hardness or the content of calcium and magnesium ions in the water sample. The measuring method disclosed by the invention not only has extremely high accuracy and precision, but also can be applied to measurement of total hardness or calcium ions under different indicators at the same time, and the turbidity of a water sample or magnesium hydroxide precipitate generated during calcium ion measurement hardly affects a test result.

The invention relates to the technical field of machine vision, in particular to a titration end point judgment method based on machine vision. The method comprises the following steps: acquiring a solution image set in a titration process through a high-resolution camera, and performing bilinear Laplace illumination correction to obtain an initial titration solution image set; performing data preprocessing and enhancement on the initial titration solution image set to obtain a to-be-analyzed titration solution image set; performing solution color dynamic change mode dynamic feature integration according to the to-be-analyzed titration solution image set to obtain a solution dynamic feature set; acquiring historical titration experiment data, and constructing a solution end point state prediction model based on the solution dynamic feature set and the historical titration experiment data; acquiring a real-time titration solution image set; and performing solution state prediction on the real-time titration solution image set through the solution end point state prediction model, and adjusting the titration speed until the titration solution reaches the end point state. The precision and efficiency of solution titration can be improved.

The utility model discloses an adjustable electric sand bath device which comprises a sand bath furnace, turnover mechanisms are arranged on the two sides in the sand bath furnace, a sand stacking mechanism is arranged in the middle in the sand bath furnace and comprises four lead screws, threaded blocks are arranged on the outer surfaces of the lead screws in a sleeved mode, an arc-shaped plate is arranged above the threaded blocks, and the arc-shaped plate is connected with the sand bath furnace. Arc-shaped bent plates are installed on the upper end faces of the arc-shaped plates, baffles are installed on one sides of the outer surfaces of the arc-shaped plates, heat conduction rods B are arranged on the opposite sides of the outer surfaces of the four arc-shaped plates, heat conduction rods A are arranged on the upper end faces of the heat conduction rods B, and heat conduction layers are arranged on the inner sides of the heat conduction rods A and the inner sides of the heat conduction rods B. The sand casting device has the advantages that sand casting can be carried out, so that sand is uniformly heated, samples at different liquid levels can be uniformly heated by arranging the sand stacking mechanism, and the applicability is improved.

The invention discloses an analysis device for drug detection, which comprises a base and a fixed plate arranged on the top surface of the base, a rotating plate is rotatably arranged on the surface of the fixed plate, a plurality of liquid storage cylinders are arranged in the rotating plate, and burettes are arranged on the bottom surface of the rotating plate and located at the bottom ends of the liquid storage cylinders. And an adjusting frame is fixedly arranged on the bottom surface of the fixing plate through a supporting rod. According to the analysis device for drug detection, through the arrangement of the cleaning and drying mechanism, the interior of the burette can be automatically flushed under the condition that the burette does not need to be disassembled, it is ensured that residual titration liquid and impurities are thoroughly removed, interference to next titration is avoided, and after cleaning is completed, the titration liquid can be completely separated from the burette. According to the burette drying device, residual liquid in a burette can be quickly discharged and dried in time, so that the burette is ensured to be in a dry and clean state, good conditions are created for subsequent titration analysis work, and meanwhile, the labor force is also reduced.

The invention provides a circulating water low-turbidity water quality online control process based on alkalinity control. On-line monitoring equipment including an alkalinity analyzer, a turbidity meter and the like is arranged at key positions such as a water inlet of a circulating water system. The alkalinity analyzer adopts an acid-base titration and potential detection technology, the measurement precision reaches + / -0.01 mmol / L, and data is transmitted at least once per minute. By simulating a multi-working-condition experiment and by means of multiple linear regression and a neural network, an alkalinity and turbidity correlation model is constructed, and the prediction accuracy of the model exceeds 95%. And the central control system performs fusion analysis on water quality parameters by applying algorithms such as fuzzy logic and the like and sends an instruction to the intelligent dosing system. The system is internally provided with an advanced algorithm and can adaptively adjust the dosing of the medicament. Practice shows that the process can stably control turbidity and reduce equipment scaling and medicament consumption cost, and has outstanding advantages in the aspect of circulating water quality control.

The invention provides a method for accurately measuring the content of lead in lead concentrate, and belongs to the field of analysis of the content of lead in lead concentrate.The method comprises the steps that firstly, a sample is decomposed, dilute sulphuric acid and hydrobromic acid are added to eliminate interference of arsenic, antimony, tin and other elements, lead is precipitated in the form of lead sulfate, and an acetic acid-ammonium acetate buffer solution is used for dissolving the lead sulfate precipitate; then adding a potassium dichromate solution to enable lead to generate a lead chromate precipitate, and titrating and measuring the content of lead in the precipitate by an oxidation-reduction titration method; and measuring the lead content of the filtrate and the filter residue by using an atomic absorption spectrometer. The invention provides a novel method for measuring the lead content in the lead concentrate, the titration end point is clearer, and accurate judgment of detection personnel is facilitated; the method can be cooperated with the existing complexometric titration method to be applied to the determination of the lead content in the lead concentrate component analysis standard substance, and meets the requirements of standard substance valuing technical specifications; and the lead content in the precipitate, the filtrate and the filter residue is measured at the same time, the lead which is easy to lose during the existing lead content measurement is corrected, and the measurement result is more accurate.

The invention belongs to the technical field of edible vegetable oil quality analysis, and discloses a construction method of a step-by-step temperature compensation model for thermal oxidation rapeseed oil quality detection based on an ultrasonic diagnosis technology. The invention aims to solve the problem that the environment temperature change can influence the sound wave pulse signal when the rapeseed oil quality is detected by utilizing an ultrasonic diagnosis technology. According to the method, a plurality of partial least squares (PLSR) or random forest method (RF) models are respectively established by adopting each integer temperature in a temperature range of 22-32 DEG C and correspondingly acquired ultrasonic data parameters in combination with physical and chemical data parameters acquired at the temperature; the prediction pertinence and accuracy of the temperature compensation model are improved in a mode of constructing a plurality of sub-models, and meanwhile, a training set, an internal verification set and an external verification set are introduced to perform multiple verification evaluation on the model, so that the prediction performance and stability of the model are ensured, and a quality index prediction value output by the model is closer to an actual quality index; and the accuracy and effectiveness of detection data are ensured.

The invention discloses a method for determining the content of hydrogen ions in a chloroplatinic acid solution, and belongs to the technical field of analytical testing. In order to solve the problems that the chloroplatinic acid solution is yellow after being diluted and the manual titration end point is difficult to judge, a potentiometric titration method is adopted, and the end point is determined by measuring electrode potential mutation without depending on indicator color change. The method comprises the steps of test condition preparation, burette calibration, standard solution preparation and calibration, sample treatment and titration, result calculation and the like, a full-automatic potentiometric titrator is selected, the titration volume is controlled within the range of 10-15 mL, and a sodium hydroxide standard solution is used for sample titration after calibration. The relative standard deviation of the determination result is less than 0.5%, the adding standard recovery rate is between 96.3% and 103.1%, and the method has the characteristics of high analysis speed, high accuracy and good stability, is suitable for accurate detection of hydrogen ions in chloroplatinic acid production and quality inspection, and effectively solves the defects of the traditional method.

The invention relates to the technical field of agricultural cultivation, in particular to a farmland soil ecological structure restoration and soil fertility improvement cultivation method which comprises the steps that 1, the soil state is evaluated; 2, tillage depth is determined; step 3, adding organic materials; 4, tillage operation is carried out, a tillage machine is used for carrying out soil tillage, the tillage depth is the tillage depth determined in the step 2, and the tillage operation adopts a layered tillage mode including shallow tillage and deep tillage; step 5, inoculating a microbial agent, namely inoculating the soil microbial agent based on the soil microbial diversity and the soil enzyme activity in the step 1 after the cultivation operation; 6, covering and maintaining are conducted, after cultivation and inoculation, soil covering and maintaining are conducted, and using of covering materials and precise water and fertilizer management are included. Accurate soil evaluation and personalized tillage depth determination enable soil remediation to be more targeted and effective; organic materials and microorganisms are reasonably matched and used, so that the soil fertility and the biological activity are improved.

The invention relates to the technical field of titration detection in analytical chemistry, in particular to a thymol phenolphthalein-TBPE composite indicated cyanide high-precision detection method which comprises the following steps: step 1, after a water sample to be detected is distilled and separated, adjusting the pH value of distillate to a strong alkaline environment required by thymol phenolphthalein color development; 2, adding a composite indicator containing thymol phenolphthalein and tetrabromo phenolphthalein ethyl ester, wherein the mass ratio of the two components in the composite indicator is determined through a color change sensitivity optimization experiment; step 3, titrating with a silver nitrate solution, and judging an end point according to three-order color mutation: the initial state is light yellow, the intermediate state is green, and the end point state is purple red; and 4, adding an auxiliary masking agent before titration, and blocking the reaction between the auxiliary masking agent and silver ions by preferentially complexing interference ions. By optimizing the ratio of the composite indicator and using the masking agent, interference of other substances can be effectively prevented, and accurate detection of cyanide is ensured.

The invention relates to the technical field of wastewater treatment, in particular to a control method for a textile wastewater treatment system. The method comprises the following steps: collecting a textile wastewater sample and carrying out pollution factor separation treatment to obtain pollution factor separation data, and further testing the chemical properties of the pollution factor separation data; further evaluating the corrosion condition of the wastewater treatment pipeline and the dynamic aging degree of the structure according to the chemical properties of the pollution factors, and judging whether the pipeline has an abnormal fracture risk or not according to the information; by detecting the abnormal fracture condition of the pipeline structure, the wastewater leakage condition is monitored, and the damage trend of the pipeline structure to the surrounding soil ecological structure is evaluated; based on the soil damage trend, evaluating the harm degree of the textile wastewater, and further analyzing the defect condition in the wastewater treatment process according to the harm evaluation result; abnormal tracing is carried out by treating defect data, and purification treatment of the textile wastewater is completed; the textile wastewater is treated, so that the textile wastewater is discharged more safely.

The invention discloses a process and a system for monitoring chloride ions in circulating cooling water based on an on-line titration mode, and belongs to the field of water quality monitoring of industrial circulating cooling water. According to the process, an automatic sampling module, a titration reaction unit, a photoelectric detection module, a data processing module and a control unit cooperatively work. Circulating cooling water enters the titration reactor through automatic sampling, after an indicator is added, a titration agent is injected into the titration reactor through a peristaltic pump, a photoelectric detector judges a titration end point according to the change of the light transmittance of a solution, and the chloride ion concentration is calculated by combining a standard curve. According to the process, manual operation is replaced by online titration, 24-hour continuous monitoring is realized, turbidity interference is effectively avoided by applying photoelectric detection and a turbidity compensation algorithm, an intelligent cleaning mechanism is arranged, pipeline blockage is prevented, the service life of equipment is prolonged, and the automation level and the monitoring precision of monitoring chloride ions in circulating cooling water are greatly improved.

The utility model provides an electrode device for detecting Zeta potential of a high-concentration sample by electrophoresis light scattering, which comprises a laser, a high-concentration sample electrode and a photoelectric detector, an incident laser beam emitted by the laser is incident in a manner of being vertical to the outer vertical surface of a micro-flow cell, and an optical fiber head of the photoelectric detector is positioned in a direction forming an angle of 12 degrees with the laser beam; the high-concentration sample electrode adopts a flow-through design, and the minimum optical path of a micro flow cell is 1.5 mm; a sample can be added into the micro-flow cell through the silicone tube. According to the utility model, the Zeta potential test requirement of a high-concentration sample can be met, the minimum sample quantity is 57 microliters, the electrode cost is low, the electrode can be replaced, and the Zeta potential titration test can be carried out by being connected with an automatic titrator.

The invention discloses a ground monitoring method for water and soil loss and carbon loss of a road slope, and belongs to the field of ecological monitoring. The method comprises the following steps: setting an engineering disturbance area and a natural contrast area according to regional water and soil loss, vegetation coverage and altitude gradient, and arranging an erosion pile sample plot to form a contrast observation network; removing impurities on the surface layer of the sample plot, collecting a soil sample, obtaining volume-weight data, and recording environmental parameters such as geographic position, altitude and gradient; the method comprises the following steps: pretreating a soil sample, measuring organic carbon content and volume weight, and obtaining carbon components and physical parameters; the exposed height of the erosion pile is measured regularly, erosion / accumulation modulus is calculated, and a space-time database is established in combination with weather, disturbance events and the like; and based on the erosion / accumulation data and the physical and chemical parameters, constructing a model to quantify carbon loss and carbon sequestration caused by water and soil loss. According to the method, through contrast point distribution, high-frequency observation and multi-parameter analysis, whole-process dynamic monitoring of complex terrain carbon migration is achieved, and the method is suitable for accurate evaluation of water and soil loss induced carbon loss in the field of ecological monitoring.

The invention provides an online monitoring method and monitoring system based on the water content of an evaporative cooling medium, relates to the technical field of monitoring of the water content of the evaporative cooling medium, and is applied to the online monitoring system based on the water content of the evaporative cooling medium. The monitoring system at least comprises a low-precision continuous detection subsystem comprising a sensor based on a dielectric constant method and a high-precision intermittent calibration subsystem comprising a Karl Fischer testing device. The monitoring method comprises the following steps: monitoring the moisture content of the evaporative cooling medium through the low-precision continuous detection subsystem, and acquiring first data corresponding to the moisture content of the evaporative cooling medium through the sensor; and under the condition that the first data characterizes that the moisture content of the evaporative cooling medium fluctuates abnormally, the high-precision intermittent calibration subsystem is started, the moisture content of the evaporative cooling medium is accurately measured through the Karl Fischer testing device, and automatic response and accurate calibration are achieved.

The embodiment of the invention discloses a seawater chemical oxygen demand solution standard substance and a preparation method thereof, and belongs to the technical field of standard substances. The method comprises the following steps: dissolving phenol in a proper amount of simulated seawater, transferring into a 1000mL volumetric flask, fixing the volume to a scale by using the simulated seawater, and uniformly shaking to prepare the seawater chemical oxygen demand solution standard substance with the concentration range of 5-500mg / L. According to the invention, high-purity phenol is taken as a solute, simulated seawater is taken as a solvent, and the seawater chemical oxygen demand solution standard substance with good stability is prepared. The validity period of the seawater chemical oxygen demand solution standard substance provided by the invention is as long as 2 years. The value setting mode of the seawater chemical oxygen demand solution standard substance provided by the invention is accurate and reliable, and is not influenced by experimental conditions and the like.

The invention discloses a detection method for rapidly determining the main content of magnesium hydroxide and calcium oxide in the process of preparing high-purity magnesium hydroxide from salt lake bischofite, which comprises the following steps: determining the main content of magnesium hydroxide: weighing a proper amount of sample, dissolving with hydrochloric acid and fixing the volume to obtain a test solution; taking a proper amount of the test solution, adding triethanolamine to mask interfering ions, adjusting the pH value with an ammonia-ammonium chloride buffer solution, taking chrome black T as an indicator, and titrating the main content of magnesium hydroxide with an EDTA standard solution; and measuring the content of calcium in magnesium hydroxide: taking a proper amount of the test solution, adding triethanolamine to mask interfering ions, adjusting the pH value by using a sodium hydroxide solution, adding a proper amount of a calcium indicator, and titrating the content of magnesium calcium hydroxide by using an EDTA standard solution. The method is simple and easy to implement, can quickly and accurately analyze and detect the main content and the calcium oxide content in the magnesium hydroxide, can realize complete dissolution of the magnesium hydroxide, and does not artificially introduce a large number of impurity elements, so that the system error is reduced, and the detection quality is improved.

The invention discloses a production and preparation process of an energy-saving synergistic raw material catalyst, particularly relates to the field of carbon-based raw material catalysts, and aims to optimize the formation condition of a pore structure, accurately regulate and control the type and concentration distribution of surface functional groups and introduce a defect detection and quantitative evaluation method based on image recognition. The catalytic activity and stability of the catalyst are improved; according to the process, through the stage steps of drying, acid pickling, pyrolysis, surface modification and the like, and in combination with a surface characterization means and quantitative indexes, collaborative optimization of the structure and chemical performance of the catalyst is ensured. The catalyst is comprehensively improved from a microstructure to chemical characteristics, and is widely applied to the fields of energy conversion, pollution treatment and the like.

The invention discloses a method for determining the content of chloride ions in coal gas, and relates to the technical field of determination of chloride ions in coal gas. The method for measuring the content of the chloride ions in the coal gas comprises the following steps: S1, a sampling link, S2, an analysis stage and S3, a calculation process, in the sampling link S1, two absorption bottles filled with ultrapure water and an empty absorption bottle are sequentially connected in series at a coal gas sampling opening, the absorption bottle is connected with a high-position gas diffusion pipe by virtue of a wet-type gas flow meter, and then gas is introduced at the flow speed of 0.5 L / min; s2, an analysis stage: pouring the absorption liquid in the two absorption bottles into a beaker, heating to boil, maintaining for 30 seconds, and then cooling to normal temperature for later use; the content X1 of chloride ions in the absorption liquid is calculated, and the formula is X1 = (V1-V0) * C * 0.03545 / V * 10 {6} * 35.5. According to the method, accurate sampling is conducted, an absorption bottle is connected in series, the flow speed is controlled, high-purity ultrapure water is matched, the chloride ion absorption efficiency and accuracy are greatly improved, and a foundation is built for follow-up accurate measurement.

The invention discloses a liquid adding device for a COD (Chemical Oxygen Demand) analytical instrument, and relates to the technical field of analytical instruments. In the structure, a plurality of digestion groups are sequentially arranged along the X-axis of a rack, and an operation port of an instrument is formed in the Y-axis direction of the rack; each digestion group comprises a plurality of digestion positions which are arranged in two rows and N columns, and each digestion group comprises a lower digestion cup and an upper condensation pipe which are arranged on each digestion position; a plurality of condensation pipes of each digestion group form a condensation module; a plurality of digestion cups of each digestion group form a digestion module; each condensation module is correspondingly connected with a moving end of a first vertical displacement mechanism moving in the Z-axis direction of the rack; the first vertical displacement mechanism corresponding to each condensation module is independently controlled by a controller; through the structure, each digestion group does not interfere with each other in the experiment process, and the use efficiency of the instrument is improved.

The utility model discloses a Karl Fischer moisture content measuring device, which relates to the technical field of moisture content detection, and comprises a carrier gas device, a sample bottle, a heating device, a gas separation bottle and a Karl Fischer tester, the gas inlet of the sample bottle is connected with the carrier gas equipment through a first pipeline and is used for hermetically heating a sample to be detected to volatilize moisture, the heating device is used for heating the sample to be detected in the sample bottle to volatilize moisture, and the gas separation bottle is communicated with the gas outlet of the sample bottle; the gas separation bottle is communicated with the sample bottle and is used for separating water vapor and other gases generated by a to-be-detected sample in the sample bottle, the Karl Fischer tester is communicated with the gas separation bottle and is used for detecting the water vapor separated from the gas separation bottle, the content of trace moisture is accurately tested, interference of other factors is avoided, the operation is simple, the cost is low, the accuracy is high, and the repeatability is good.

The utility model discloses an intelligent automatic moisture titrator which comprises a main body base, a placing plate and a dropping pipette, and is provided with a contact, a fixed plate, a micro motor, a movable plate, a side plate, a matching head, a turntable, a sliding block and a clamping plate, so that a test bottle can be directly placed in the center of a mounting cylinder to extrude the contact to be in contact with a contact on the fixed plate; and then a micro motor drives a lead screw to rotate, a movable plate moves, a rotating disc rotates under the cooperation of a matching head and a straight groove, and then a sliding block drives a clamping plate to conduct intelligent and automatic butt clamping and fixing under the cooperation of a first matching rod and an arc-shaped groove. The device can realize intelligent fixation of a test bottle, and is provided with a spring pin, a transverse plate, a rotating plate, a clamping block and a matching rod II, the spring pin is pushed to enable the matching rod II outside the transverse plate to be matched with the rotating plate, so that the rotating plate rotates, then a dropping pipette is placed, pushing of the spring pin is released, and the transverse plate drives the rotating plate to reset; the dropping pipette can be clamped and fixed through the clamping blocks, and operation is convenient.

The invention relates to the technical field of novel material chemical analysis, and discloses a triphenyl phosphate purity standard substance valuing method, which comprises the following steps: filtering, drying, dissolving and sterilizing a triphenyl phosphate sample; a triphenyl phosphate sample is comprehensively analyzed from different angles by comprehensively applying a GC-MS (Gas Chromatography-Mass Spectrometry) technology, an NMR (Nuclear Magnetic Resonance) technology, an infrared spectroscopy, a gas chromatography-flame ionization detector method, a Karl Fischer method and an inductively coupled plasma mass spectrometry, and finally, the purity value of the triphenyl phosphate purity standard substance is calculated by a mass balance method. The method provides a scientific and accurate technical means for quality control and standard formulation of the triphenyl phosphate product, has important practical application value for related industries in the fields of chemical engineering and material science, and is beneficial for improving the product quality and promoting industrial upgrading.