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90 results about "Permanganate index" patented technology
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The permanganate index is an assessment of water quality. It involves the detection of oxidation by potassium permanganate in an acid medium under hot conditions. The method is to heat a sample in a boiling water-bath with a known amount of potassium permanganate and sulphuric acid for a fixed period time (10 min). Part of the permanganate will be reduced by oxidizable material in the sample. The consumed permanganate can be determined by addition of an excess of oxalate solution, followed by titration with permanganate. The method applies to waters having a chloride ion concentration of less than 300 mg/L. Samples having a permanganate index over 10 mg/L should be diluted before analysis. The lower limit of the optimum range of the test is 0.5 mg/L.
Method for predicting chlorophyll a concentration in water based on BP nerval net
ActiveCN101158674AReduce in quantityReduce consumptionGeneral water supply conservationTesting waterWater basedPredictive methods
The invention relates to a density forecast method of the chlorophyll a stemmed from a water body of the BP neural network. The density forecast method comprises the following steps: (1) the chlorophyll a in the tested water body and the value of other correlative water quality index which influences the chlorophyll a are acquired as the examination data. (2) The neural network of an error back propagation is established. (3) The neural network is trained and tested. (4) The neural network which passes the test is utilized to forecast the chlorophyll a in the water body. Other water qualities which influence the chlorophyll a are: Ammonia nitrogen, total nitrogen, total phosphorus, orthophosphate, permanganate index, temperature, dissolved oxygen, pH, suspension, five-day biochemical oxygen demand. The step (1) also comprises a normalization process. The data of the chlorophyll a and other ten water quality indexes are between -1 and +1 after the data of the chlorophyll a and other ten water quality indexes are normalized. The neural network comprises an input layer, an intermediate layer and an output layer. The invention can establish a forecast model related to the chlorophyll a, just needing the experiment which has the limited times. The chlorophyll in the river can be accurately and quickly forecasted through the computer simulation experiment and the science forecast.
Owner:TIANJIN MUNICIPAL ENG DESIGN & RES INST
High pressure flow injection rapid analysis system for permanganate index of water quality
InactiveCN101320001AIncrease the lengthDoes not affect the smooth dischargeMaterial analysis by observing effect on chemical indicatorPeristaltic pumpEngineering
Owner:DELIN ENVIRONMENTAL PROTECTION TECH
Emergency handling process for sudden burst of raw material alga
InactiveCN101134626AGood removal effectGood algae removalMultistage water/sewage treatmentWater/sewage treatment using germicide/oligodynamic-processChlorine dioxideEmergency treatment
The emergency treatment process for material water with water bloom includes the following steps: 1. throwing chlorine dioxide in the amount of 0.5-5.0 mg / l for pre-oxidation; 2. adding active carbon powder in 5-50 mg / l for adsorption; 3. adding flocculant polyferric aluminum chloride to react, and filtering after precipitation; and 4. sterilizing with chlorine in 2.5-3.5 mg / l. The process has excellent algae, algal poison and arene eliminating capacity, ideal permanganate index eliminating effect, simple technological process and low cost, and is suitable for emergency treatment for material water with water bloom.
Owner:济南市供排水监测中心
Method for quickly detecting hypermanganate index in water by molecular absorption spectrometry
ActiveCN101975756AImprove accuracyRapid determinationColor/spectral properties measurementsEnvironmental resistanceGas phase
The invention discloses a method for quickly detecting hypermanganate index in water by molecular absorption spectrometry. The method comprises the following steps: selecting a color comparison tube to extract a water sample, adding proper sulfuric acid to ensure the water sample is of acidity; adding 0.01 to 0.2umol / L of hypermanganate solution, and heating for 30 minutes in a heat reactor at 100 DEG C; cooling, reducing the residual hypermanganate with nitrite, and adding excessive nitrite to react 3 to 5 minutes; putting 1ml of the reaction solution after constant volume in a 25ml color comparison tube; adding citric acid-ethanol solution, and converting the nitrite into nitrogen dioxide instantly; and carrying gas-phase molecules to an absorption tube by carrier gas, and detecting the light absorption value at the position of 213.9 nano-wavelength. The invention establishes a quick quantitative analysis method for the hypermanganate index in the water by an indirect nitrite detection mode, has the characteristics of quick detection, high accuracy, less turbidity influence, little reagent and safety and environmental protection, and can be widely applied to emergency, online detection, flowing injection, lab information management and the like.
Owner:浙江中通检测科技有限公司
Permanganate index on-line monitoring automatic titration determination method and device
ActiveCN107703202AHigh precisionGuaranteed accuracyMaterial analysis by observing effect on chemical indicatorMaterial electrochemical variablesTurbidityEngineering
The invention discloses a permanganate index on-line monitoring automatic titration determination method and device; based on an automatic measurement flow, an end point is jointly determined with cooperation of two ways of absorbance and electric potentials, and the relationships of the changes of the solution absorbance and the electric potentials with the titration volume are simultaneously used in the titration determination method, staging and selective design is performed for the entire titration process, and different titration speeds are adopted in different titration stages so as to ensure the accuracy of the titration. Two conditions of the absorbance and the electric potentials are used at the same time; when the solution not only meets conditions of photometric determination ofthe end point but also meets the conditions of electrode determination of the end point during automatic titration, the titration is determined to reach the end point; through a specific titration algorithm and the determination way, the method and device solve the problems that the electric potential generates aging and drifting because a traditional photometric method is interfered by water colors, turbidity and other factors and an ORP electrode is used for a long time.
Owner:ZHONGXING INSTR SHENZHEN
Method for rapidly measuring permanganate indexes in water by spectrophotometric method
InactiveCN102012362AAvoid titrationReduce usagePreparing sample for investigationColor/spectral properties measurementsInformatizationEthylenediamine
The invention relates to a method for rapidly measuring permanganate indexes in water by a spectrophotometric method. The method comprises the following steps: selecting a colorimeter tube and extracting a water sample; adding a proper amount of sulfuric acid until the water sample is acidic; adding 0.01mu mol / L-0.2mu mol / L of permanganate solution and heating the obtained mixed solution in a heating reactor at 100 DEG C for 15-45 minutes; after the mixed solution is cooled, reducing the remaining permanganate with excessive nitrite, and then adjusting the obtained reaction solution into a constant volume after the reaction; taking out and placing 1ml of the reaction solution with a constant volume in the colorimeter tube of 25ml, adjusting the reaction solution into a constant volume once again, and sequentially adding 0.5ml of sulfanilamide and 0.5ml of ethylenediamine; and standing for 10 minutes, and taking water as a reference and measuring the absorbancy by a cuvette with the optical path length of 10mm at the position with the wavelength of 10mm. In the invention, a rapid quantitative analysis method of the permanganate indexes in the water is established by the mode of indirectly measuring the nitrite; the method is rapid and economical, and the process of titrating sodium oxalate with the permanganate can be avoided; and the method can be widely applied to emergency, online monitoring, flow injection, lab informatization management and the like.
Owner:宁波市环境监测中心
Coupling water supply purifying method of biological reinforced powder active carbon and diatomite
ActiveCN101746842AReduce pollutant contentEasy to handleWater/sewage treatment by sorptionBiological water/sewage treatmentActivated carbonOrganic matter
The present invention relates to a coupling water supply purifying method of biological reinforced powder active carbon and diatomite, which comprises the following steps: firstly, powder active carbon and diatomite are continuously fed into raw water which needs to be purified quantitatively to be stirred to mix through mechanism to enable the powder active carbon and the diatomite to suspend in water to absorb organic matters in the raw water; then, biological powder active carbon and diatomite particles coated with microorganism are formed by a labor reinforced method; and organic pollutants in the raw water is further degraded by a microorganism function. Compared with the prior art, on the basis of the coupling water supply purifying technique of biological reinforced powder active carbon and diatomite, the present invention has three functions of absorption, biological degradation and dynamic film separation, and can further reduce the content of pollutants in the raw water, in particular to aim to the problems of high raw-water permanganate index, ammonian and organic pollutants, and the like. Thus, drinking water after being purified satisfies every index in the new sanitary standard for life drinking water GB 5749-2006 issued by China.
Owner:华方水务(中国)有限公司
Device for detecting water environment monitoring instrument fully automatically on line in configuring way
ActiveCN102830210AImprove work efficiencyImplement fixed pointTesting waterAmmoniacal nitrogenChemical oxygen demand
The invention relates to a device for detecting a water environment monitoring instrument fully automatically on line in a configuring way, comprising a liquid adding unit, a solution storing device, a detector for detecting the water quality on line, a control storer, a data transmission module and a display screen. The liquid adding unit comprises a plurality of pipe control valves; the pipe control valves are connected with an input pipe of the standard solution to be monitored; the detector for detecting the water quality on line is used for measuring the relevant parameters of the solution stored in the solution storing device and connected with the detection signal end of the control storer; and the output end of the control storer is connected with the input ends of the pipe control valves. Due to the implementation of the device, the work efficiency can be improved by more than 10 times. The device can be used for detecting a plurality of different types of COD (chemical oxygen demand), ammonia nitrogen, total phosphorus, permanganate index monitors in the fixed place and time quantitatively in a configuring way.
Owner:CHANGZHOU INST OF MEASUREMENT & TESTING TECH
Acid and alkali permanganate index on-line one-machine monitoring system and detection method thereof
ActiveCN102692415AMaterial analysis by observing effect on chemical indicatorPeristaltic pumpMeasuring instrument
The invention provides an acid and alkali permanganate index on-line one-machine monitoring system and the detection method thereof. The acid and alkali permanganate index on-line one-machine monitoring system includes an ARM9 main-control system, a permanganate index on-line monitoring instrument and a chloride ion concentration measuring instrument, wherein the ARM9 main-control system is connected with the permanganate index on-line monitoring instrument and the chloride ion concentration measuring instrument through a CAN bus respectively; the permanganate index on-line monitoring instrument includes a peristaltic pump, a measuring cup, a liquid level detector, a ten-port multi-position valve, a digestion titration device, a water sample, a reagent and distilled water; the water sample, the reagent and the distilled water are connected with distribution ports of the ten-port multi-position valve respectively; the lower end of the measuring cup is connected with a common port of the ten-port multi-position valve; the peristaltic pump is connected with the upper end of the measuring cup through a pipeline; the liquid level detector is installed at the upper part of the measuring cup; and one distribution port of the ten-port multi-position valve respectively is connected with a liquid inlet / outlet of the digestion titration device. Considering the economy and environmental protection, the invention provides a technical device for measuring the permanganate index through integrating the two standard acid and alkali permanganate index methods.
Owner:YIWEN ENVIRONMENTAL SCI & TECH GUANGZHOU
River water quality evaluation method based on multiple parameter indexes
InactiveCN107290495ASolve the problem of inconsistent evaluation resultsEmission reductionTesting waterNitrateAir quality index
The invention discloses a river water quality evaluation method based on multiple parameter indexes. According to the method, river water quality is evaluated and graded on the basis of a WQI (water quality index) and with WQImin as an index. The fact that WQImin containing NH4-N, CODMn, NO3-N, DO (dissolved oxygen) and tur (turbidity) is in significant positive correlation with the WQI is discovered, so that WQImin containing NH4-N, CODMn, NO3-N, DO and tur can be adopted to constitute WQImin to replace the original WQI obtained by calculating numerous parameters required to be determined, and rapid evaluation and type classification of river water quality can be realized. The method is simple and easy to operate, low in cost and easy to popularize and has quite obvious advantages.
Owner:NANJING INST OF GEOGRAPHY & LIMNOLOGY
Measurement method for permanganate index and application
ActiveCN104792714AIncrease dosageReduce dosageColor/spectral properties measurementsSulfosalicylic acidDigestion
The invention discloses a measurement method for a permanganate index. The method comprises the following steps: (1) adding a to-be-measured water sample into a colorimetric tube provided with a plug, adding (1+10) sulfuric acid for acidification, adding a potassium permanganate solution, and shaking uniformly; (2) digesting the water sample in the step (1) under a certain condition and quickly cooling to a room temperature; (3) adding an excessive ammonium ferrous sulfate solution into a digestion solution in the step (2), and shaking uniformly; (4) adding a proper amount of a sulfosalicylic acid aqueous solution into a reaction solution in the step (3) for producing a color development reaction; (5) performing absorbance testing on the water sample in the step (4) by taking de-ionized water as a reference at the wavelength of 510 nm, and calculating the permanganate index of the water sample by a formula IMn=-8.5*(A-A0), wherein in the formula, IMn is the permanganate index of the water sample, A is the absorbance of the water sample, and A0 is the absorbance of a blank solution. The measurement method is quick and accurate in detection, suitable for batch measurement and simple to operate, and can be widely applied to laboratory detection and outdoor emergency detection.
Owner:北京连华永兴科技发展有限公司
Permanganate index analyzer and permanganate index analysis method
PendingCN107727792AHigh precisionUniform thermal decompositionChemical analysis using titrationWater bathsRobotic arm
The invention discloses a permanganate index analyzer and a permanganate index analysis method. The permanganate index analyzer comprises a base, a controller, a to-be-tested sample zone, a water bathheating decomposition zone and a heat-preservation titration zone, wherein positions of to-be-tested samples are arranged inside the to-be-tested sample zone; a plurality groups of water bath heatingmodules are arranged inside the water bath heating decomposition zone; a water bath heating module is in communication connection with the controller; the heat-preservation titration zone comprises titration positions and heat-preservation modules; a magnetic stirrer is arranged below each titration position; the heat-preservation modules and the magnetic stirrers communicate with the controller;a first mechanical arm and a second mechanical arm are arranged on the base; a color sensing element and a liquid supply titration component are arranged on the second mechanical arm; the titration component, the color sensing element, the first mechanical arm and the second mechanical arm are all in communication connection with the controller. By adopting the permanganate index analyzer, the problems of low precision and low efficiency of permanganate index analysis in the prior art are solved.
Owner:QINGDAO SHUNXIN ELECTRONICS SCI & TECH CO LTD
Fast high-precision automatic sample transferring and taking device for permanganate index analyzer
PendingCN110053030AHigh precisionPrevent overshootProgramme-controlled manipulatorGripping headsMechanical engineeringFast speed
The invention relates to a fast high-precision automatic sample transferring and taking device for a permanganate index analyzer. The fast high-precision automatic sample transferring and taking device comprises an X-axis unit (1), a Y-axis unit (2) and a Z-axis unit (3). The X-axis unit (1) comprises a first linear module (11), a first heavy sliding rail (12) and a first servo motor (13), the Y-axis unit (2) comprises a second linear module (21), a second heavy sliding rail (22) and a second servo motor (23), and the Z-axis unit (3) is provided with an electric clamping jaw (4). Compared withthe prior art, the fast high-precision automatic sample transferring and taking device has the advantages of being high in precision and high in speed.
Owner:SHANGHAI ANJIE ENVIRONMENTAL PROTECTION TECH
Multi-parameter water quality detection method and multi-parameter water quality detector based on same
InactiveCN105806792AEasy to implement onlineIncrease costPreparing sample for investigationColor/spectral properties measurementsTotal nitrogenSurface water
A multi-parameter water quality detection method comprises the steps as follows: (1) preparing a standard solution, (2) creating a standard curve, 3) sampling a sample, 4) preprocessing the sample, 5) performing experimental determination and 6) calculating permanganate index concentration, ammonia nitrogen concentration and total nitrogen concentration. A multi-parameter water quality detector comprises a main unit body provided with a storage bin and an experiment bin. According to the detection method, detection of a permanganate index, ammonia nitrogen, total nitrogen, nitrite nitrogen and nitrate nitrogen of a to-be-detected substance is realized through an absorption spectrum, the operation procedure is simplified, the on-line condition of the detector is facilitated, the defects of many required instruments and high cost of the different traditional methods are overcome, multiple parameters can be detected on line in real time by one detector, the measurement time is short, the accuracy is high, the detection limit is low, the lowest detection limit of total nitrogen is 0.5 mg / L, the lowest detection limit of ammonia nitrogen is 0.1 mg / L, the lowest detection limit of the permanganate index is 0.1 mg / L, and the detection requirements of the Quality standard for ground water and the Environmental quality standards for surface water (GB3838-2002) for total nitrogen, ammonia nitrogen and the permanganate index can be met.
Owner:QINGDAO JIAMING MEASUREMENT & CONTROL TECH
Method for measuring water transparency under present situation and non under present conditions
InactiveCN101038281AForecasting the Changing State of TransparencyForecast distribution change lawTesting waterParticle suspension analysisNatural factorTurbidity
The water transparency is an important index reflecting the water limpidity and turbidity extent. The present invention provides a method used for obtaining water transparency under current conditions and noncurrent conditions, which comprises steps of inputting data about water features, current features, boundary hydrology, water quality, and the like, into related formulas to work out suspended matter concentration, chlorophyl concentration and permanganate index concentration; and then inputting the suspended matter concentration, chlorophyl concentration and permanganate index concentration obtained into transparency prediction formulas to work out the water transparency values. The present invention is capable of used for detecting the water features under current conditions in a water environment, referring to detecting the water transparency; for calculating out the water environment or transparency improving effect for a variety of pollution controlling steps; and for working out the affecting extent on the water environment or transparency by nature factors.
Owner:HOHAI UNIV
Robot-based permanganate index analyzer
PendingCN107632106ASimple processSimplify deviceProgramme-controlled manipulatorMaterial analysis by observing effect on chemical indicatorPermanganate saltProcess engineering
The invention provides a robot-based permanganate index analyzer. The robot-based permanganate index analyzer is characterized by comprising a work platform, a sample moving mechanism and a reagent adding mechanism, wherein the work platform comprises a sample area, a heating reaction area and a titration area; the sample moving mechanism performs three-dimensional motion in the work platform andpicks and places samples in the work platform to specific work positions according to specific workflow; the reagent adding mechanism moves in the heating reaction area and the titration area and addsspecific reagents to the samples placed in the work range of the reagent adding mechanism according to specific workflow; the samples and the reagents are mixed and react in the heating reaction area; a detection mechanism in the titration area judges color change of the samples, so that the end point of the reaction is judged. The robot-based permanganate index analyzer is high in precision, andthe problems of errors caused by manual detection and the like can be solved.
Owner:上海北裕分析仪器股份有限公司
Automatic analyzer for index of permanganate in water and analysis method
ActiveCN105738361AHigh sensitivityHigh precisionMaterial analysis by observing effect on chemical indicatorData processing systemPeristaltic pump
The invention discloses an automatic analyzer for an index of permanganate in water and an analysis method. The automatic analyzer comprises a peristaltic pump, a chemical flowing path, a detector and a data processing system, wherein the chemical flowing path comprises an electric valve, a tee joint, a heater, a back pressure reaction pipe, a capillary connection pipe, a sample ring, at least three peristaltic pump pipes, a vessel bottle and a flowing basin; the electric valve is provided with at least six connectors and has two states; the first state is a sample carrying state, and the second state is a sample injection state. The automatic analyzer can continuously and automatically digest and test samples, and is high in test speed, high in test sensitivity, high in accuracy, high in precision and high in repetitiveness.
Owner:BEIJING BAODE INSTR CO LTD
Double-platinum electrode type permanganate index online analyzer titration end point indicating device
InactiveCN109521077ASimple structureReduce maintenanceMaterial electrochemical variablesPlatinumExcitation current
The invention discloses a double-platinum electrode type permanganate index online analyzer titration end point indicating device. The device comprises a double-platinum electrode, an excitation current reversing module, a constant current source module, a signal acquisition module and a microprocessor module, wherein the double-platinum electrode is placed in a reaction solution; the constant current source module is connected with two platinum sheets of the double-platinum electrode through the excitation current reversing module; the excitation current reversing module is connected with thesignal acquisition module; the signal acquisition module is connected with the microprocessor module. According to the device, the titration end point is judged by using the double-platinum electrode, the electrode structure is simple, the maintenance rate is low, the service life is long, the adopted titration end point indication mode is unique, the end point indication is accurate and is not influenced by the electrode voltage drift.
Owner:NARI TECH CO LTD +1
Water quality on-line permanganate index monitor and detecting method
PendingCN110346509AReduce workloadImprove monitoring accuracyChemical analysis using titrationPreparing sample for investigationDisplay deviceDigestion
The invention relates to a water quality on-line permanganate index monitor, comprising a chassis, wherein a touch display is mounted on the chassis; an industrial control machine, a digestion unit, atitration unit, a sampling unit, a liquid adding unit and a drainage storage unit are mounted in the chassis; the digestion unit, the titration unit, the sampling unit, the liquid adding unit and thedrainage storage unit are respectively connected to the industrial control machine; a sulfuric acid quantification bottle, a sodium oxalate quantification bottle, a pure water quantification bottle and a water sample quantification bottle are all mounted with capacitive sensors. The monitor can achieve independent injection and drainage, and a semi-closed digestion pool can perform high temperature digestion of a sample to resolve metal ions; the solution can be mixed thoroughly by means of a stirring motor, and electrodes can be well cleaned. The invention also relates to a detecting methodof the water quality on-line permanganate index monitor, which can achieve continuous monitoring of an on-line water quality permanganate index to reflect the change of the water quality permanganateindex at any time, thereby reducing the workload of monitoring personnel.
Owner:SHANGHAI YIDIAN SCI INSTR
Syringe pump sample injection gas phase molecule absorption spectrometer
InactiveCN102788762AEasy to controlGuaranteed accuracyColor/spectral properties measurementsPeristaltic pumpGas phase
The invention discloses a syringe pump sample injection gas phase molecule absorption spectrometer, and relate to the technical field of optical analysis. The spectrometer is aimed at problems that an existing sample injection device needs frequent replacement of a peristaltic pump pipe, has low precision, can not realize function of automatic dilution in any ratio, and can only determine one substance to be measured at one time, with low work efficiency. The spectrometer provided by the invention comprises a sample injection device, a gas-liquid separation device, a drying device, a heating device and a detection device. The sample injection device comprises at least one sample injection pipes; and an output end of the sample injection pipe is connected with the gas-liquid separation device and for sending a reagent to the gas-liquid separation device; the sample injection pipe comprises a syringe pump, a sample injection duct communicating with the syringe pump, and at least one sample injection branch pipe respectively communicating with the sample injection duct and for sending different reagents to the sample injection duct successively. The invention is particularly suitable for determination of indexes of ammonia, sulfide, Kjeldahl nitrogen, total nitrogen, nitrate, nitrite, sulfite, chloride ion, and potassium permanganate.
Owner:上海北裕分析仪器股份有限公司
Method for measuring permanganate index with phenanthroline-ferrous ion color development method and application
InactiveCN104792780AEasy to quantifyHigh color reaction selectivityMaterial analysis by observing effect on chemical indicatorColor/spectral properties measurementsSodium acetateAnti jamming
The invention discloses a method for measuring a permanganate index with a phenanthroline-ferrous ion color development method. The method comprises the following steps: (1) adding a to-be-measured water sample into a colorimetric tube provided with a plug, adding (1+7) sulfuric acid for acidification, adding a potassium permanganate solution, and shaking uniformly; (2) digesting the water sample in the step (1) under a certain condition and quickly cooling to a room temperature; (3) adding an ammonium ferrous sulfate solution into a digestion solution in the step (2), and shaking uniformly; (4) adding a phenanthroline-sodium acetate aqueous solution into a reaction solution in the step (3) for adjusting the pH (potential of hydrogen) value of a system to be 3-5, and producing a color development reaction; (5) performing absorbance testing on the water sample in the step (4) by zero setting of a reference solution at the wavelength of 510 nm, and calculating the permanganate index of the water sample by a formula IMn=7.666A-0.012, wherein in the formula, IMn is the permanganate index of the water sample and A is the absorbance of the water sample. The measurement method is high in color development reaction selectivity, strong in anti-jamming capability, complete in reaction and simple and convenient to operate.
Owner:北京连华永兴科技发展有限公司
Full-automatic permanganate index analyzing system
PendingCN108508140AGuaranteed accuracyGuaranteed reliabilityChemical analysis using titrationMaterial analysis by observing effect on chemical indicatorLinear motionPeristaltic pump
The invention discloses a full-automatic permanganate index analyzing system. The system is provided with a controller and comprises an automatic sampling device and an automatic slaking device, wherein the automatic sampling device comprises a base I, a second rotating disc is arranged on the base I, a sample bottle is arranged on the second rotating disc, a third linear motion module is arrangedabove the second rotating disc, and a cleaning pipe and a sampling pipe are arranged on the third linear motion module; and the automatic slaking device comprises a base II, a first rotating disc, aheating titration region and reagent bottles are sequentially arranged along the length direction of the base II, a reaction bottle is arranged on the first rotating disc, a second linear motion module is arranged above the first rotating disc, a sample feeding pipe and a pure water pipe are arranged on the second linear motion module, the sample feeding pipe is connected with the sampling pipe through a peristaltic pump, a titration rod is arranged above the heating titration region, the reagent bottles are respectively connected with the pure water pipe and the titration pipe, a first linearmotion module is arranged on the base II, and an electric gripper is arranged on the first linear motion module.
Owner:JINAN SENTE ELECTRONICS TECH
Judgment method of orp value titration end point of permanganate index water quality analyzer
ActiveCN102288667AExclude wrong measurementsMaterial electrochemical variablesEndpoint DeterminationTitration
The invention relates to a permanganate index type water quality analyzer, in particular to a permanganate index type water quality analyzer for determination of a titration endpoint in an ORP (oxidation-reduction potential) electrode method. In the titration endpoint determination method for the ORP value of the permanganate index type water quality analyzer, the maximum ORP_A of the ORP value is obtained in the first phase of each measurement, the minimum ORP_B of the ORP value is obtained in the second phase of the measurement, and ORP_K is calculated as the determined ORP value for the titration endpoint of the measurement through ORP_K = [(ORP_A) - (ORP_B)] * 30% + (ORP_B). Therefore, the ORP value for each titration endpoint is dynamically determined, errors in determination caused by ORP aging and drifting can be eliminated, and maintenance avoidance and accurate determination can be effectively achieved during the service life of the whole ORP electrode.
Owner:厦门隆力德环境技术开发有限公司
Method for online automatic detection of permanganate index in water
InactiveCN111157466AGuaranteed accuracyImprove accuracyColor/spectral properties measurementsPermanganate saltProcess engineering
The invention discloses a method for online automatic detection of permanganate index in water. The method comprises the following steps: preparing a used reagent; finishing calibration of a standardcurve, and verifying the accuracy and repeatability of online automatic detection equipment and glucose test; manually testing different types of surface water and standard solutions thereof in a laboratory according to a national standard method to obtain permanganate indexes in the surface water; testing the corresponding surface water and the standard solution thereof by online automatic detection equipment to obtain absorbance; enabling the online automatic detection equipment to calculate permanganate indexes in different types of surface water according to the standard curve; and comparing a laboratory method with an automatic calculation method, calculating a relative error, and judging whether the relative error is within a standard requirement range. By using the method provided by the invention, the accuracy and repeatability of the online automatic detection equipment are good, the glucose test and the adding standard recovery rate meet the requirements, and the method has great significance for environmental protection in the field of online monitoring of surface water quality.
Owner:左航
Multifunctional multi-channel sample loading device for permanganate index analyzer
PendingCN110058037AAvoid cross contaminationGuaranteed accuracyMaterial analysisInjection portSystems design
The invention relates to a multifunctional multi-channel sample loading device for a permanganate index analyzer. The multifunctional multi-channel sample loading device for the permanganate index analyzer comprises a shell, four groups of sample loading units, a four-way reversing valve, and a mobile sample loading head, wherein the sample loading units aremounted in the shell and used for independently adding reagents required for a test, and each group of sample loading unitscomprises a syringe pump; a pure water sample injection port, a reagent sample injection port, a sample discharging port, and a syringe pump connection port are formed in the four-way reversing valve correspondingly,and the four-way reversing valve isconnected with the syringe pump through the syringe pump connection port; and the mobile sample loading head is movably arranged in the shell and horizontally moves in the shell, and the mobile sample loading head is connected with the sample discharging port of thefour-way reversing valve. Compared with the prior art, the multifunctional multi-channel sample loading device for the permanganate index analyzer adopts a 4-channel sample injection system design, cross-contamination between different reagents is effectively avoided, and reliability of experimental result data is improved; no pipeline is reused, the cumbersome reused pipeline cleaning and liquidthrowing processesare reduced, liquid addition efficiency is improved, and analysis and measurement time are saved.
Owner:SHANGHAI ANJIE ENVIRONMENTAL PROTECTION TECH
Method for determining potassium permanganate index in water by using DPD
InactiveCN107727586AEasy to operateThe measurement result is accurateColor/spectral properties measurementsWavelengthAbsorbance
The invention discloses a method for determining a potassium permanganate index in water by using DPD. The method comprises the following steps: using sulfuric acid for acidizing a to-be-detected water sample and then adding excessive standard potassium permanganate solution; heating and reacting for a period of time and then utilizing the residual potassium permanganate therein to oxidize N,N-diethyl-1,4-phenylenediamine, thereby generating a red DPD free radical; adopting a visible spectrophotometer for determining an absorbance value of the DPD free radical on the position of characteristicwavelength 510nm or 551nm and using the absorbance value for calculating the concentration of the residual potassium permanganate; calculating the consumption of potassium permanganate according to the concentration of the residual potassium permanganate, thus obtaining the potassium permanganate index in the to-be-detected water sample. The method has the advantages of simple operation, short determining time, environmental-friendly reagents and high precision of determining result.
Owner:HUAQIAO UNIVERSITY
Method of electrochemically measuring permanganate index by virtue of stannic oxide nanometer electrode
ActiveCN102213688AImprove current efficiencyImprove measurement accuracyMaterial electrochemical variablesTin dioxideSodium sulfate
The invention belongs to the technical field of environmental monitoring and relates to a method of measuring a permanganate index of a cleaner water body by utilizing an electrochemical method, wherein the method is characterized in that a stannic oxide nanometer electrode which utilizes metal titanium as a substrate and has a surface in a nanometer stick array structure is utilized as working electrode, the stannic oxide nanometer electrode is prepared by utilizing a hydrothemal method to cause SnCl4.5 H2O and NaOH which are utilized as precursors to react on the metal titanium substrate at180-200 DEG C for 16-24 hours; a working voltage when in electrochemical measurement is respectively 1.7-2.2 V when a saturated silver / chlorinated silver electrode is utilized as a reference electrode and 1.65-2.15 V when a saturated calomel electrode is utilized as a reference electrode, the concentration of sodium sulfate or sodium nitrate in the electrolyte solution is 0.08-0.4 mol / L. According to the invention, no toxic materials can be generated when in measurement, and the method provided by the invention has the advantages of high measurement accuracy, low detection limit, permanganateindex detection lower limit up to 0.2 mg / L (S / N=3), simplicity and convenience in operation and short single measurement time less than 5 minutes.
Owner:DALIAN UNIV OF TECH
Method for testing permanganate index though gas phase molecular absorption spectroscopy
InactiveCN105203488AEasy to operateNo dragging phenomenonColor/spectral properties measurementsGas phaseSpectroscopy
The invention discloses a method for testing a permanganate index though gas phase molecular absorption spectroscopy. The method comprises the steps of measuring and picking a defined amount of water to be tested, placing the water into a reaction vessel, adding sulfuric acid so that the mixture can be acidic, or adding sodium hydroxide so that the mixture can be alkaline, then adding a given mass of potassium permanganate solutions, conducting heating reaction for a period of time, so that reducible substances in the mixture are oxidized by potassium permanganate, adding excessive nitrite solutions for conducting reduction on residual potassium permanganate, and then adding hydrochloric acid and ethanol solutions. When ethyl alcohol is added to hydrochloric acid mediums and serves as a catalyst, nitrite can be transformed into NO<2> instantly. Carrier gas is blown into the reaction vessel for loading NO<2> into a gas phase molecular absorption spectrometer, and the watery potassium permanganate content and the watery permanganate index can be obtained through calculation. The method is simple, rapid and convenient in operation step, by using hydrochloric acid and ethyl alcohol as the catalysis solutions, the reaction is greatly accelerated, the testing result is free of tailing peak phenomenon, and errors are minor.
Owner:孙璐
Portable gas-phase molecular absorption spectrometer
InactiveCN102798599ASimple structureReduce manufacturing costColor/spectral properties measurementsGas phaseSulfide
The invention discloses a portable gas-phase molecular absorption spectrometer, relates to the technical field of optical analysis, and aims to solve the problems that a detection device in the conventional gas-phase molecular absorption spectrometer is complicated in structure, complicated in operation and inconvenient to carry and cannot meet requirements on content determination of outdoor objects to be detected. The portable gas-phase molecular absorption spectrometer comprises a sampling device, a heating device, a gas liquid separation device, a drying device and the detection device, wherein the detection device comprises a sensor, a detector, a signal processing system, a control system and a read-out system, which are sequentially connected; and the sensor is positioned at a gas output port of the gas liquid separation device. The portable gas-phase molecular absorption spectrometer is particularly applicable to determination of ammonia nitrogen, sulfide, Kjeldahl nitrogen, total nitrogen, nitrate, nitrite, sulfite, chloride ions and permanganate index.
Owner:苏州北裕环保仪器制造有限公司
Method for testing permanganate index
ActiveCN111024888AImprove accuracyChemical analysis using titrationGeneral water supply conservationPermanganate saltOxalic acid
The invention provides a method for testing permanganate index, which comprises the following steps: (a) a sample to be tested, a sulfuric acid solution and a potassium permanganate solution are mixed, the mixture is heated to a temperature of 94.6-94.9 DEG C according to t<ideal>= 94.831-77.737*exp(-t / 113.082), and an oxidation reaction is performed during the heating process, wherein the volumeratio of the to-be-tested sample to the sulfuric acid solution to the potassium permanganate solution is 20: 1: 2, the concentration of the potassium permanganate solution is 0.31-0.33 g / L, the concentration of the sulfuric acid solution is 485-495 g / L, and the concentration of a sodium oxalate solution is 0.83-0.85 g / L; (b) excessive sodium oxalate solution is added for reduction reaction, potassium permanganate solution is dropwise added until the potential value changes suddenly, and the titration time is recorded, wherein the titration rate is 25mL / 1000s; and (c) the permanganate index iscalculated according to the titration time and a formula. The permanganate index measured by adopting the method is relatively high in accuracy.
Owner:HANGZHOU GREAN WATER SCI & TECH INC
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