153 results about "Titration" patented technology

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 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 discloses a prospecting exploration method for ion adsorption type heavy rare earth ore in middle and low mountainous areas, and belongs to the technical field of geological mineral exploration. According to Y, Dy and Nb abnormity and Y-Nb combination abnormity areas such as water chemical exploration and soil chemical exploration of a working area, high-silicon, potassium-rich, alkali-rich and sphene-rich heavy rare earth secondary mineral mineralization mother rocks are preferably selected, and a favorable mineralization area of the ion adsorption type heavy rare earth ore is delineated by combining characteristic parameters that Y / Ce is greater than 0.9 and Dy / Ce is greater than 0.2; screening south and east-south-east abrupt slope (gradient of about 30 degrees) areas by utilizing a GIS spatial analysis technology, overlapping favorable mineralization areas of the ion adsorption type heavy rare earth ore, and comparing and determining an ion adsorption type heavy rare earth ore prospecting target area in a working area; whether mineralization abnormity exists in the heavy rare earth ore prospecting target area or not is verified by using a manual impact sampling drill and a rare earth ion leaching-titration qualitative analysis method; chemical samples are preliminarily collected, 15 components of ion phases are analyzed, whether heavy rare earth ore bodies exist or not is judged and evaluated, the prospecting exploration range of the ion adsorption type heavy rare earth ore is determined, and the prospecting efficiency of the ion adsorption type heavy rare earth ore is improved. According to the method, the mineralization prospective area of the ion adsorption type heavy rare earth ore can be rapidly delineated in a large range, the prospecting target area is narrowed, and the prospecting efficiency of the ion adsorption type heavy rare earth ore is improved.

The invention relates to the field of chemical analysis automation equipment, and discloses an automatic potentiometric titration method which comprises the following steps: before a titration task is started, executing adaptive cleaning and collecting residual spectrum fingerprints of a system; calibrating a titration prediction model in real time by using the fingerprint; performing predictive titration to obtain complete titration data; after the titration is finished, carrying out multi-dimensional analysis on the whole process data, and quantitatively evaluating the pollution risk and the data quality; and finally, dynamically adjusting the cleaning strategy of the next task according to the evaluation result, and adaptively updating the prediction model according to the prediction deviation of the titration. By establishing a closed-loop intelligent working process of cleaning, diagnosis, feedback and learning, the state of the system can be sensed in real time, a cleaning strategy and a prediction model can be dynamically adjusted, the cleaning effect is ensured, self-optimization of the titration process is also realized, the long-term analysis accuracy and the intelligent level of the automatic titration system are improved, and the working efficiency is improved. And the dependence on manual intervention and troubleshooting is reduced.

The invention relates to a mercury content detection method, and relates to the technical field of mercury detection. According to the mercury content detection method, the to-be-detected sample is preliminarily quantified by using the X-ray spectrometer, the mercury content range of the to-be-detected sample can be quickly obtained, the to-be-detected sample is weighed according to the preliminarily measured mercury content, and the accuracy and reliability of subsequent detection can be guaranteed. By means of constant-temperature water bath heating, it can be guaranteed that a sample to be detected is completely decomposed, meanwhile, a solution in the cover type funnel is poured back into the conical flask, mercury compounds volatilized after heating can be collected, mercury content loss is avoided, and the stability and accuracy of subsequent detection results are further guaranteed. The mercury standard solution is prepared, the inductively coupled plasma emission spectrometer is used for detection, manual titration operation is not needed, the anti-interference capability is good, the mercury content can be accurately measured, and the stability and accuracy of a detection result are effectively guaranteed.

A computer implemented system for performing automated titration testing of water samples in order to calculate certain relevant metrics to ensure that the water at the water sites meets the desired standards. A computing device has an testing module that analyzes and produces reports containing data regarding the metrics for samples that have undergone testing using a separate titration device. The titration device includes an automated mobile carousel that holds multiple samples and a reaction chamber with a receptacle configured to receive fluid from the samples. The titration testing device automatically pumps the sample into a sample container held in place in the reaction chamber and pumps an appropriate amount of titrant depending on the metric being tested for so that different titrants are used depending on the metric and detects when the color change / endpoint occurs. Data is collected and reported to the computing device and titration testing module.

The application belongs to the technical field of analysis and detection, and discloses a method for continuously detecting pH value, sulfuric acid content and zinc ion content of electroplating liquid or conductive roller cleaning liquid. The method comprises the following steps: 1) selecting the "pH" block in "pH / mV" on the potential titrator, setting the instrument parameters, inserting the electrode into the to-be-detected liquid, and reading the pH value displayed by the potential titrator; 2) selecting the "mV" block in "pH / mV" on the potential titrator, selecting the dynamic pH titration mode, setting the instrument parameters, diluting the to-be-detected liquid after the pH value is detected, inserting the electrode into the diluted to-be-detected liquid, and adopting the sodium hydroxide standard solution titration, and ending the titration after two equivalent points appear; and 3) calculating the pH value, sulfuric acid content and zinc ion content of the to-be-detected liquid through a formula. The application can realize the continuous detection of the three indexes by adopting one instrument and one standard titration solution, is simple, fast and high in accuracy, and can effectively reduce the influence of chemical reagents on the health of workers.

The application provides an automatic titration analysis method for measuring the aluminum content in high aluminum alloy, which adopts direct reaction of fluoride with a test solution to realize one-step direct titration, and determines the aluminum content in the range of 2.00% to 100.00%, and comprises the following steps: sample decomposition; precipitation of interfering ions; calibration of sodium fluoride standard solution; calibration of automatic potentiometric titrator; and measurement of the sample to be tested. The application solves the problems of sample pretreatment and how to avoid the influence of interfering ions on the determination of aluminum content. The titration operation, reading and calculation are automatically completed by the instrument, effectively reducing human errors, and the application has the advantages of simple operation, accurate and rapid results, wide application range and the like.

The invention discloses a method for testing the content of trivalent metal elements in a metal oxide, and belongs to the technical field of chemical analysis. The method comprises the following steps: firstly, reducing trivalent metal elements in a sample into divalent metal elements by using a reducing agent ammonium ferrous sulfate in a strong acid environment, wherein unreacted ammonium ferrous sulfate remains in a system; then, potassium permanganate is adopted for titration of unreacted ammonium ferrous sulfate, the end point is based on the fact that the solution becomes light pink and keeps color fastness for 15 seconds, and meanwhile a blank solution is set to eliminate system background interference; by comparing the difference between the blank titration volume and the sample titration volume and combining the titration concentration and the sample mass, the content of the trivalent metal elements in the sample can be accurately calculated. The method has the advantages of simplicity and convenience in operation, strong anti-interference capability, high detection precision and wide application range, is suitable for various metal oxide material systems, and is particularly suitable for quality control and performance analysis of new energy materials and catalysts.

This invention belongs to the field of analytical chemistry technology, specifically relating to a composite indicator and testing method for determining cadmium content in crude cadmium. The composite indicator comprises xylenol orange, thymol blue, and sodium indigo disulfonate, with a mass ratio of xylenol orange, thymol blue, and sodium indigo disulfonate of 1.0–1.5:0.3–0.6:0.5–1.0. This invention utilizes the ternary compound of xylenol orange, thymol blue, and sodium indigo disulfonate, employing the blue background of sodium indigo disulfonate and the reddish-purple and yellow hues of xylenol orange for optical color adjustment. This transforms the color change at the titration endpoint from the traditional reddish-purple to yellow to a bluedish-purple to yellowish-green, significantly increasing the color difference and creating a clear and sharp color change interface, greatly improving the accuracy and reliability of visual endpoint determination.

The application provides a kind of for inductively coupled plasma mass spectrometry alkaline liquid automation processing device and method, it is related to automation processing technical field.The inductively coupled plasma mass spectrometry alkaline liquid automation processing device of the described device is controlled and adjusted by intelligent control module to temperature control unit, acid-base adjusting unit and mixed uniform control unit in acid-base titration module, and the control and adjustment of liquid level detection unit in constant volume module by intelligent control module, realize the automation processing of alkaline liquid, can effectively improve the automation pretreatment efficiency and analysis efficiency of inductively coupled plasma mass spectrometry alkaline liquid, improve the accuracy and reliability of analysis result, can adapt to the rapid analysis demand of large-scale alkaline liquid sample.The alkaline liquid automation processing device of the application can be widely applied to the pretreatment of inductively coupled plasma mass spectrometry and inductively coupled plasma atomic emission spectrometry alkaline liquid.

The invention discloses an on-line automatic monitoring method and system for total alkalinity in water, and relates to the technical field of water quality on-line monitoring. When the current measuring state of the system is a starting state, a sampling unit is controlled to convey a target water sample to a mixed reaction unit based on a preset water sample flow; the reagent unit is controlled to convey a target reagent to the mixed reaction unit; dynamically adjusting the flow rate of the target reagent based on a proportional integral differential control strategy, so that the pH value of a mixed solution formed by mixing the target water sample and the target reagent in the mixed reaction unit fed back by the detection unit in real time is stabilized at a preset endpoint pH threshold value; and determining the total alkalinity of the target water sample based on the flow velocity of the target reagent when the pH value is stable, the concentration of the target reagent and the preset water sample flow. The pH value is stabilized at the titration end point by dynamically adjusting the reagent flow rate, the total alkalinity is calculated according to the reagent flow rate, the water sample flow rate and the reagent concentration during balance, continuous and rapid measurement can be realized, and the reagent consumption is low.

The invention provides a system for detecting and analyzing the content of sulfuric acid in sulfuric acid alkylation reaction effluent and a detection method. The analysis system comprises a sample collection and storage module, a sample pretreatment module, an acid-base titration detection module and a data processing module, and realizes efficient and accurate detection and dynamic feedback of the content of free sulfuric acid in effluent under complex working conditions; key support is provided for device operation state monitoring, technological process monitoring and product quality control, the detection efficiency is improved, the method is suitable for rapid detection and feedback in the operation process of an industrial device, the timeliness and safety of process control are enhanced, and the method has wide industrial applicability and popularization value.

The utility model discloses a titration device for quantitative drug analysis, which comprises a base, the top of the base is fixedly connected with a fixed support plate, one side of the fixed support plate is fixedly connected with a support table, the top of the support table is fixedly connected with a stepping motor, and the output end of the stepping motor is fixedly connected with a hollow plate. One side of the fixed supporting plate is fixedly connected with a funnel pipe, a titration groove rod is rotationally connected to the position, located in the funnel pipe, inside the fixed supporting plate, one end of the titration groove rod is fixedly connected with a disc, and a bolt is in threaded connection to the position, located in the hollow plate, inside the disc. The titration device is simple in structure, easy to operate, compact in structure and higher in practicability, and compared with a traditional device, the titration device is provided with the stepping motor, the hollow plate, the funnel pipe, the titration groove rod, the disc, the bolt and the threaded hole, so that different distances of the bolt mounted at the center of the disc can be adjusted according to use requirements.

The invention relates to the field of chemical analysis and detection, in particular to a method for rapidly detecting the concentration of industrial concentrated acid based on neutralization reaction, which comprises the following steps: 1, theoretical calculation; converting molar concentration according to acid density and mass fraction; 2, accurately measuring the volume of target acid by using a pipette; 2, injecting 100-150ml of pure water into the triangular flask, and adding 3-5 drops of phenolphthalein; 3, slowly injecting an acid sample into the triangular flask, and slightly shaking and uniformly mixing; 4, adding 10.00 ml of NaOH solution by using the pipette, and oscillating for 10-20 seconds; 3, result interpretation: transparency and colorless: acid is excessive when the acid concentration reaches the standard, pH is less than or equal to 8.2 after neutralization, pink lasts for 20-30 seconds, and reinspection is needed when the acid concentration is insufficient and the pH is greater than or equal to 8.3. The method has the beneficial effects that 1, a reverse judgment method is adopted, namely the conventional end-point titration is replaced by fixed alkali amount, so that the detection time is shortened to 2 minutes; 2, safety design: pre-dilution reduces the risk of acid mist, and only a trace amount of raw acid is needed to avoid acid corrosion; 3, multi-acid adaptation: compatibility with detection of different types of concentrated acids is realized through pipetting volume adjustment;

The invention provides a titration constant volume device. The titration constant volume device comprises an operation platform, a feeding device, a first carrying device, a liquid adding device, a second carrying device and an analysis device. The operation platform is provided with a first area, a second area and a third area which are sequentially arranged. The feeding device comprises a cup body feeding assembly, the cup body feeding assembly is arranged on the first area, the cup body feeding assembly is used for storing cup bodies, and liquid samples are contained in the cup bodies. The first carrying device is arranged on the first area and is used for carrying the sample bottles and the cup bodies to the second area and the like. The analysis device is arranged on the third area and is used for analyzing and detecting the solution in the cup body. The steps of sample transfer, split charging, titration and constant volume and the like do not need manual intervention, so that the personal safety of operators and the environmental safety of a laboratory are remarkably improved.

This application provides a continuous titration method for the sulfuric acid and ammonium nitrate content of silicon etching solution. The continuous titration method includes the following steps: weigh m grams of silicon etching solution sample into a sample bottle, add phenolphthalein indicator, titrate with a first sodium hydroxide standard solution of concentration C1 until a pink color is achieved, and record the volume consumed V1. Calculate the sulfuric acid content. Add neutral formaldehyde solution to the same solution and let it stand for a first preset time to generate a free acid solution. Continue titrating the free acid solution with a second sodium hydroxide standard solution of concentration C2 until the solution turns pink. Gently heat the solution to a preset temperature and maintain this temperature for a second preset time. If the pink color persists, the titration endpoint is determined, and the volume consumed V2 is recorded. Calculate the ammonium nitrate content. This method achieves continuous titration of two components with a single sample, eliminates mutual interference between components, optimizes the endpoint determination method, and thus achieves a simple operation, high accuracy, low sample consumption, and high detection efficiency.

The embodiment of the invention relates to a method for measuring the chloride ion concentration in water-based drilling fluid, which comprises the following steps: acquiring the voltage of a chloride ion sensor in various standard liquids with known concentrations at a preset constant temperature, and establishing a calibration corresponding relation between the voltage and the chloride ion concentration; diluting a to-be-detected water-based drilling fluid sample into a to-be-detected mixed solution according to a fixed proportion; and maintaining the to-be-measured mixed solution at the constant temperature, measuring the voltage of the to-be-measured mixed solution by using a chloride ion sensor, determining the concentration value of the to-be-measured mixed solution based on the calibration corresponding relation, and calculating the actual chloride ion concentration value of the water-based drilling fluid by combining the fixed proportion. According to the embodiment, a traditional chemical titration agent is abandoned, the potential safety hazard that an operator makes contact with toxic strong acid and carcinogenic potassium chromate is eliminated, the water-based drilling fluid to be detected is adjusted to the optimal linear range of a chloride ion sensor through quantitative dilution, and the detection efficiency and timeliness are greatly improved.

The invention discloses a method for determining the content of a nickel element in ferronickel, which mainly comprises the following steps: dissolving a ferronickel sample with hydrochloric acid, nitric acid and hydrofluoric acid under the condition of microwave digestion, firstly determining the content of the cobalt element in a test solution by adopting inductively coupled plasma emission spectrometry, secondly taking the test solution and adding a masking agent to mask interference elements, a copper ion selective electrode is used as an indicator electrode, an Ag / AgCl electrode is used as a reference electrode, a Cu-EDTA solution is used as an indicator, EDTA is used as a titrant, the content of nickel and cobalt elements in a sample is calculated according to the consumption of an EDTA standard titration solution, and finally the content of the nickel element can be obtained by deducting the content of the cobalt element from the content of the nickel and cobalt elements. The method solves the problem of determination of the nickel element in ferronickel, improves the precision and accuracy of analysis and measurement, and is rapid in measurement and simple and convenient to operate.

The invention discloses a method for detecting zinc stearate in a stabilizer, and belongs to the technical field of heat stabilizer component detection. The detection method comprises the following steps: carrying out ethanol Soxhlet extraction on a part of a stabilizer to be detected to obtain an extracting solution; freezing the extracting solution, and if a precipitate is obtained, carrying out qualitative test on the precipitate by adopting FTIR (Fourier transform infrared spectroscopy) and / or GCMS (gas chromatography mass spectrometry) to determine whether the stabilizer to be tested contains zinc stearate or not; and when FTIR and / or GCMS test results prove that the stabilizer to be tested contains zinc stearate, carrying out zinc quantitative test on the stabilizer to be tested by adopting a titration method or an ICP-OES (Inductively Coupled Plasma-Optical Emission Spectrometer) method. According to the method, rapid screening, selective separation and high-precision quantification of zinc stearate in the stabilizer can be realized, and a reliable analysis means is provided for quality control of the PVC heat stabilizer.

The application belongs to the field of chemical detection and analysis, and particularly relates to a method for analyzing potassium hydroxide in a hydrazine boronic acid system, comprising the following steps: step 1, adding hydrogen peroxide to a sample for sample pretreatment; step 2, adding bromothymol blue indicator to the pretreated sample, titrating the pretreated sample with hydrochloric acid, and recording the volume of hydrochloric acid consumed by the sample; step 3, performing a blank test, and recording the volume of hydrochloric acid consumed by the blank test; step 4, calculating the concentration of KOH in the sample, denoted as a measured concentration; and step 5, calculating the difference of the measured concentration, and determining the concentration of KOH in the sample. The method can solve the interference of a weak acid and weak base system on the titration of potassium hydroxide, and can quickly and accurately analyze the concentration of potassium hydroxide in a potassium hydrazine boronic acid alkali solution by adding hydrogen peroxide for pretreatment and selecting bromothymol blue as an indicator.

The invention is suitable for the technical field of equipment control, and provides an ammonia water concentration analysis-based automatic feeding method and electronic equipment, and the method comprises the following steps: in an ammonia water preparation process, obtaining an ammonia water concentration value through an ammonia water concentration sensor in an ammonia water preparation device; the ammonia water concentration sensor is used for absorbing a preset volume of ammonia water from the ammonia water preparation device and determining the ammonia water concentration through a reagent titration method; if the ammonia water concentration value meets the preset feeding condition, feed gas is added to the ammonia water preparation device based on a preset first feeding strategy. According to the method, the ammonia water concentration is internally measured through the built-in ammonia water concentration sensor, ammonia gas leakage caused by concentration measurement can be reduced, the safety of the ammonia water generation process is improved, and the management degree of the ammonia water generation process is improved.

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.

This invention discloses a Karl Fischer titrator, relating to the field of chemical analysis instrument technology. It includes a detection stage, a titration flask, a homogenization unit, an anti-fouling unit, and a titration unit. The detection stage provides a mounting base for the titration flask, which holds the reaction solution. The homogenization unit homogenizes the reaction solution, the anti-fouling unit recirculates any residue adhering to the wall back into the reaction solution, and the titration unit controls the amount of Karl Fischer solution added. During titration, the homogenization unit is activated, driving the titration unit to add the Karl Fischer solution to the titration flask while simultaneously homogenizing the solution to prevent dead zones. The anti-fouling unit recirculates any residue adhering to the wall back into the reaction solution, preventing droplets from being unable to participate in subsequent reactions, thus avoiding detection errors and waste.

A toner comprises a toner particle and silica fine particles, wherein, fragment ions of a D unit structure are observed in time-of-flight secondary ion mass spectrometry measurement of the silica fine particles, in a titration operation of the silica fine particles using NaOH, the titer is within a specific range, an area of a peak from −25 to −15 ppm in 29Si-NMR measurement of the silica fine particles is denoted by D, the sum of the areas of peaks from −140 to 100 ppm is denoted by S, and an area of a peak from more than −19 ppm to −17 ppm or less is denoted by D1, the specific surface area of the silica fine particles, D, D1, and S satisfy specific relationships, and a specific amount of a specific polyvalent metal element is present on the surface of the toner particle.

The application provides a method for analyzing nickel in a zinc-nickel electroplating solution. The method comprises: performing standard coulometric titration on a sodium thiosulfate standard solution to calculate an actual molar concentration c 标准 ; adding an oxidizing agent solution and a sodium hydroxide solution to the zinc-nickel electroplating solution to obtain a high-nickel hydroxide precipitate, then adding a KI solution and sulfuric acid to obtain a sample solution; adding a second part of the sodium thiosulfate standard solution and a second part of a KI electrolyte to an electrolytic cup to perform sample coulometric titration and calculate the molar concentration c 镍 of nickel in the zinc-nickel electroplating solution. The application uses the change in the valence state of nickel hydroxide, combines a redox reaction with an indirect coulometric titration method, and obtains a cyanide-free coulometric titration method for quantitatively determining the content of nickel in a zinc-nickel electroplating solution. The method does not need to prepare a standard solution, indirectly determines nickel by using electrically generated iodine in a high-concentration zinc metal ion background, realizes high selectivity, high precision, and online determination of the content of nickel, and can significantly improve the detection efficiency.

The utility model relates to the technical field of medicine inspection and analysis, and discloses an analysis titration device for medicine inspection, which comprises an operating table, a protective door is rotatably connected to the front side of the operating table, a fixing mechanism is arranged at the top of the operating table, a titration mechanism is arranged at the top of the operating table, and the fixing mechanism comprises a first servo motor. The first servo motor is fixedly connected to the inner bottom of the operation table, the rear side of the first servo motor is fixedly connected with a worm, the left side of the worm is meshed with a worm gear, the worm gear is internally and fixedly connected with a rotating rod, the top of the rotating rod is fixedly connected with a placement table, and the top of the placement table is provided with a volumetric flask. By means of the arranged fixing mechanism, when medicine needs to be inspected and analyzed, a first servo motor, a worm, a worm gear and a rotating rod are matched, rotation of the containing table can be achieved, a volumetric flask is conveniently driven to rotate, and a second servo motor drives a two-way threaded rod to rotate.

The invention provides a water quality detection system and method, and the system comprises a detection module which comprises a detection electrode and an automatic titration unit, and the detection electrode is configured to detect the concentration of free ammonia in a water sample to be detected and convert the concentration into a potential signal; the automatic titration unit is configured to titrate an alkaline solution into the water sample to be detected so as to convert fixed ammonia into free ammonia; and the control and data processing module is electrically connected with the detection module, and is configured to receive the potential signal, control the start and stop of the automatic titration unit according to the received potential signal, and calculate the total content of free ammonia and the total content of ammonia in the ammonia distillation wastewater according to the potential signal and the titration amount of the alkaline solution. The water quality is monitored in real time, the problems of long detection period and poor time efficiency of the existing ammonia distillation wastewater are solved, manual operation errors are reduced through automatic operation, and the detection precision is improved.

The application relates to the field of on-site rapid detection technology, and provides a titration method using a portable microtitration analysis system.S1, a quantitative sample is placed in a liquid drop counting bottle;S2, an indicator in a plastic drop bottle is quantitatively added into the liquid drop counting bottle according to the sample volume;S3, a buffer solution or an auxiliary reagent in a plastic square bottle is quantitatively added into the liquid drop counting bottle according to the sample volume;S4, after titration liquid in an ampoule bottle is sucked by using the handheld microtitration device, titration is carried out on the liquid drop counting bottle, and the titration is stopped after the liquid in the liquid drop counting bottle is discolored.The beneficial effect lies in that the heteroscedasticity is used to judge the uniformity of the mixture of substances in the liquid, a miniature camera is used to collect liquid photos in the liquid drop counting bottle in real time, the heteroscedasticity of each pixel in the photos is calculated in real time, and whether the titration discoloring is completed or not can be accurately judged, and whether the titration is terminated or not.