CN202453323U - Device for continuously analyzing pH (potential of hydrogen) value, phenolphthalein alkalinity, total alkalinity and chlorine ion concentration - Google Patents
Device for continuously analyzing pH (potential of hydrogen) value, phenolphthalein alkalinity, total alkalinity and chlorine ion concentration Download PDFInfo
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- CN202453323U CN202453323U CN2012200631221U CN201220063122U CN202453323U CN 202453323 U CN202453323 U CN 202453323U CN 2012200631221 U CN2012200631221 U CN 2012200631221U CN 201220063122 U CN201220063122 U CN 201220063122U CN 202453323 U CN202453323 U CN 202453323U
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Abstract
The utility model discloses a device for continuously analyzing pH (potential of hydrogen) value, phenolphthalein alkalinity, total alkalinity and chlorine ion concentration. The device comprises a potentiometric titrimeter main machine with two electrode interfaces, wherein one electrode interface is connected with a pH electrode 1 which is used for acquiring the initial pH value and the phenolphthalein alkalinity of a detected sample and the real-time pH value in the total alkalinity titration process, and a standard acidic solution adding unit 2 which is used for containing standard acidic solution and dropping the standard acidic solution in the phenolphthalein alkalinity and total alkalinity titration process; and the other electrode interface is connected with a silver electrode 3 which is used for acquiring the silver electrode potential value of the detected sample obtained after total alkalinity titration is completed in the chlorine ion potentiometric titration process. The device additionally comprises a standard silver nitrate solution adding unit 4 which is used for containing standard silver nitrate solution and dropping the standard silver nitrate solution in the chorine ion potentiometric titration process, and a control system which is arranged in the potentiometric titrimeter main machine and is used for titration parameter control and data output. The device for continuously analyzing pH value, phenolphthalein alkalinity, total alkalinity and chlorine ion concentration has the advantages that the detection time can be shortened and the working efficiency of equipment is improved.
Description
Technical field
The utility model relates to the titrimetry device in analytical chemistry field, more particularly, relates to the device of a kind of continuous analysis pH value, phenolphthalein alkalinity, total alkalinity and chlorine ion concentration.
Background technology
Industrial circulating cooling water and boiler feed water need keep the basicity of certain numerical value, and purpose is corrosion and the fouling that slows down metallic conduit.According to national technical standard, basicity is divided into phenolphthalein alkalinity and total alkalinity again.Total alkalinity has another name called full basicity or methyl orange base.PH value, basicity are less than normal, possibly be because the metal generation sour corrosion that contacts with water; Otherwise pH value, basicity are too big, possibly be the metal generation alkaline corrosions that contacts with water.Industrial circulating cooling water and boiler feed water also need be controlled impurity concentration and be no more than limit value, and impurity concentration surpasses limit value, also possibly quicken metal erosion, causes fouling.Chlorion is that performance is the most stable in all foreign ions, and chlorine ion concentration is convenient to detect, so generally controls impurity concentration with the control chlorine ion concentration in the industry.
Therefore, in order to slow down corrosion of metal and to reduce fouling, GB50050-2007 " Code for design of industrial recirculating cooling water treatment " and GB/T1576 " Industrial Boiler water quality " have listed pH value, phenolphthalein alkalinity, total alkalinity and chlorion in conventional monitoring project.
PH value, phenolphthalein alkalinity, total alkalinity and chlorine ion concentration conventional method are manual mensuration or the potentiometric titration of individual event purpose, and four projects have detected and needed more than half an hour consuming time.
Potentiometric titration is in titration process, to pass through to measure potential change to confirm the method for titration end-point, compares with direct potentiometric method, and potentiometric titration does not need potential electrode potential value accurately, and potentiometric titration is to lean on the hop of electrode potential to indicate titration end-point.Before and after titration was reached home, the ion concentration to be measured in the dropping liquid often changed the n one magnitude continuously, causes the hop of current potential, and the content of tested composition still calculates through the amount that consumes titrant.
Existing pH value, basicity and chlorine ion concentration testing process are separately carried out separately, and testing process is following:
1, the mensuration of pH value
After gathering the testing sample of certain volume, put into sample to the pH electrode, the sample pH value value can be transmitted electric potential signal and give main frame, after main frame is changed electric potential signal, demonstrates the pH value of sample.
2, phenolphthalein alkalinity and total alkalinity are measured
After gathering the testing sample of certain volume, put into sample to the pH electrode, dripping hydrochloric acid standard solution in the sample is reduced to a threshold value up to the pH value, calculates basicity value with testing sample volume, standard acid consumption volume and concentration.The result that limit value is set at pH value 8.0-8.3 is a phenolphthalein alkalinity, and the result that limit value is set at pH value 4.0-4.3 is a total alkalinity
3, determination of chloride ion
After gathering the testing sample of certain volume; Because industrial circulating cooling water and boiler feed water are alkalescence, must regulate the pH value to neutral or acid, could carry out the potentiometric titration of chlorion toward dropping silver nitrate standard solution in the solution; Occur up to prominent point more, titration stops.Calculate the chlorine ion concentration value with testing sample volume, silver nitrate standard solution consumption volume and concentration thereof.
Conventional detection is mainly according to national standard method, and four projects are respectively according to GB/T6904-2008 " mensuration of pH value in industrial circulating cooling water and the boiler feed water " GB/T15451-2006 " mensuration of industrial circulating cooling water total alkali and phenolphthalein alkalinity " GB/T15453-2008 " mensuration of chlorion in industrial circulating cooling water and the boiler feed water " independent detection.Skilled four projects of the single completion of testing staff needed more than half an hour consuming time.Therefore, when the pH value that detects industrial circulating cooling water and boiler feed water, basicity and chlorine ion concentration, the efficient of prior art is lower.
The utility model content
The technical matters that the utility model will solve is; Above-mentioned when the pH value that detects industrial circulating cooling water and boiler feed water, basicity and the chlorine ion concentration to prior art; The defective that the efficient of prior art is lower provides the device of a kind of continuous analysis pH value, phenolphthalein alkalinity, total alkalinity and chlorine ion concentration.
Find in pH value, phenolphthalein alkalinity, total alkalinity and four project independent detection of the chlorine ion concentration process, many places identical operations step is arranged after deliberation.Same steps as in pH value and the basicity testing process has: in the basicity test process, use the pH electrode, the pH value variation tendency in the collecting test process has comprised initial pH value and endpoint pH.Same steps as in basicity and the chlorine ion concentration testing process: before the chlorine ion concentration test, need be adjusted to neutrality or acidity to the pH value of water sample from alkalescence earlier, this step is similar with the basicity test process.
The utility model after the realization primary sample, is accomplished testing process of the comprehensive one-tenth of four self-contained process successively pH value, phenolphthalein alkalinity, total alkalinity and chlorine ion concentration and is detected.This process does not need to carry out separately the pH value and detects, also need be before the chlorion test adjusting pH value, in the test process shortening consuming time ten minutes.These utility model characteristics are the work efficiencies that shorten detection time, improve equipment, the consumption of also saving sample consumption and standard acid.
The utility model solves the technical scheme that its technical matters adopted: the device of constructing a kind of continuous analysis pH value, phenolphthalein alkalinity, total alkalinity and chlorine ion concentration; The pH value, phenolphthalein alkalinity, total alkalinity and the chlorine ion concentration that are used for titrimetry industrial circulating cooling water and boiler feed water; Comprise: the potentiometric titrimeter main frame that has the bipolar electrode interface; One electrode interface is connected with the pH electrode of the real-time pH value of the initial pH value that is used to gather sample and phenolphthalein alkalinity and total alkalinity titration process, and ccontaining standard acid solution, is used for the standard acid solution liquid feeding unit that phenolphthalein alkalinity and total alkalinity titration process drip the standard acid solution; Another electrode interface is connected with the silver electrode of the silver electrode potential value of in the sample that the total alkalinity titration finishes, gathering chlorion potentiometric titration process; This device also comprises: ccontaining silver nitrate titer, be used for the silver nitrate titer liquid feeding unit that chlorion potentiometric titration process drips the silver nitrate titer, and the control system of being located in the said potentiometric titrimeter main frame, carrying out control of titration parameter and data output.
In the device of the described continuous analysis pH value of the utility model, phenolphthalein alkalinity, total alkalinity and chlorine ion concentration, this device also comprises titration platform.
In the device of the described continuous analysis pH value of the utility model, phenolphthalein alkalinity, total alkalinity and chlorine ion concentration, said titration platform is provided with stirrer.
In the device of the described continuous analysis pH value of the utility model, phenolphthalein alkalinity, total alkalinity and chlorine ion concentration; Also be provided with the communication interface that is connected with computing machine on the said potentiometric titrimeter main frame; Said control system is connected with computing machine through said communication interface, carries out the computing machine instant playback of phenolphthalein alkalinity titration, total alkalinity titration, chlorion potentiometric titration titration data.
In the device of the described continuous analysis pH value of the utility model, phenolphthalein alkalinity, total alkalinity and chlorine ion concentration, this device also comprises the measuring cup of the sample of ccontaining setting volume.
In the device of the described continuous analysis pH value of the utility model, phenolphthalein alkalinity, total alkalinity and chlorine ion concentration, also be provided with the control panel that is connected with said control system on the said potentiometric titrimeter main frame.
In the device of the described continuous analysis pH value of the utility model, phenolphthalein alkalinity, total alkalinity and chlorine ion concentration, this device also comprises pH electrode protection unit and the silver electrode protected location of analyzing finish ccontaining and fixing said pH electrode of difference and silver electrode.
Implement the analytical approach and the device of continuous analysis pH value, phenolphthalein alkalinity, total alkalinity and the chlorine ion concentration of the utility model; Have following beneficial effect: the utility model four of pH value, phenolphthalein alkalinity, total alkalinity and chlorine ion concentrations independently testing process comprehensively become a testing process; After the primary sample, accomplish pH value, phenolphthalein alkalinity, total alkalinity and chlorine ion concentration successively and detect.This process does not need to carry out separately the pH value and detects, also need be before the chlorion test adjusting pH value, in the test process shortening consuming time ten minutes; This utility model not only shortens detection time, improves the work efficiency of equipment, the consumption of also saving sample consumption and standard acid.
Description of drawings
To combine accompanying drawing and embodiment that the utility model is described further below, in the accompanying drawing:
Fig. 1 is the structural representation that the utility model is analyzed device first embodiment of pH value, phenolphthalein alkalinity, total alkalinity and chlorine ion concentration continuously;
Fig. 2 is the method flow diagram of the first embodiment analytical approach of the utility model device of analyzing pH value, phenolphthalein alkalinity, total alkalinity and chlorine ion concentration continuously;
Fig. 3 is the phenolphthalein alkalinity of the utility model device first embodiment of analyzing pH value, phenolphthalein alkalinity, total alkalinity and chlorine ion concentration continuously and the titration curve figure of total alkalinity;
Fig. 4 is the titration curve figure of the chlorine ion concentration of the utility model device first embodiment of analyzing pH value, phenolphthalein alkalinity, total alkalinity and chlorine ion concentration continuously.
Embodiment
Understand for technical characterictic, purpose and effect to the utility model have more clearly, contrast the embodiment that accompanying drawing specifies the utility model at present.
Like Fig. 1-shown in Figure 4; Analyze continuously among first embodiment of device of pH value, phenolphthalein alkalinity, total alkalinity and chlorine ion concentration at the utility model; This device comprises: the potentiometric titrimeter main frame that has the bipolar electrode interface; One electrode interface is connected with the pH electrode 1 of the real-time pH value of the initial pH value that is used to gather sample and phenolphthalein alkalinity and total alkalinity titration process, and ccontaining standard acid solution, is used for the standard acid solution liquid feeding unit 2 that phenolphthalein alkalinity and total alkalinity titration process drip the standard acid solution; Another electrode interface is connected with the silver electrode 3 of the silver electrode potential value of in the sample that the total alkalinity titration finishes, gathering chlorion potentiometric titration process; This device also comprises: ccontaining silver nitrate titer, be used for the silver nitrate titer liquid feeding unit 4 that chlorion potentiometric titration process drips the silver nitrate titer, and the control system of being located in the potentiometric titrimeter main frame, carrying out control of titration parameter and data output.
This device also comprises titration platform, and titration platform is provided with stirrer.
Also be provided with the communication interface that is connected with computing machine on the potentiometric titrimeter main frame; Control system is connected with computing machine through communication interface; Carry out the computing machine instant playback of phenolphthalein alkalinity titration, total alkalinity titration, chlorion potentiometric titration titration data, comprise the instant playback of the titration curve figure of Fig. 3 and Fig. 4.
This device also comprises the measuring cup 5 of the sample of ccontaining setting volume.
Also be provided with the control panel that is connected with control system on the potentiometric titrimeter main frame.Can carry out the setting of titration parameter through control panel.
This device also comprises analyzes finish pH electrode protection unit and silver electrode protected location ccontaining respectively and Stationary pH electrode 1 and silver electrode 3.Analysis finishes, and cleans pH electrode 1 and silver electrode 3 with distilled water, and is after the cleaning that pH electrode 1 and silver electrode 3 is ccontaining and be fixed on pH electrode protection unit and silver electrode protected location, so that electrode is protected.
In the present embodiment, use the device of the utility model that the Industrial Boiler water is analyzed, analyze its pH value, phenolphthalein alkalinity, total alkalinity and chlorine ion concentration, analytical approach may further comprise the steps:
A, the container of setting the volume sample will be housed be fixed on the titration platform of potentiometric titrimeter; With standard acid solution liquid feeding unit basicity titration sample; The pH electrode is gathered the initial pH value of sample and the real-time pH value of basicity titration process; The basicity titration is carried out successively: the phenolphthalein alkalinity titration, and its titration end-point pH is 8.0-8.3; And total alkalinity titration; Its titration end-point pH is 4.0-4.3; When arriving titration end-point; Read the phenolphthalein alkalinity volumetric solution volume and the total alkalinity volumetric solution volume of the standard acid solution in the standard acid solution liquid feeding unit respectively, calculate phenolphthalein alkalinity and total alkalinity, the initial pH value of pH electrode collection is the pH value of sample; The standard acid solution is meant the acid solution of concentration known, and in the present embodiment, the standard acid solution is the sulfuric acid standard solution, and the concentration of sulfuric acid standard solution is C
1/2H2SO4=0.1000mol/L.In other embodiment, the standard acid solution also can be the nitric acid standard solution.
B, close the pH electrode and open silver electrode; In the sample that above-mentioned total alkalinity titration finishes, carry out the chlorion potentiometric titration with silver nitrate titer liquid feeding unit; Silver electrode is gathered the silver electrode potential value of chlorion potentiometric titration process, and the chlorion potentiometric titration is dynamic titration, and titration end-point is the hop point of silver electrode current potential; The volumetric solution volume of silver nitrate titer in the silver nitrate titer liquid feeding unit when reading titration end-point calculates chlorine ion concentration.The silver nitrate titer is meant the liquor argenti nitratis ophthalmicus of concentration known or titer, and in the present embodiment, the titer of silver nitrate titer is T=3.696mg/mL.
Say further, before analysis, carry out the setting of titration parameter, be specially:
PH value, basicity titration parameter are provided with: set endpoint titration pattern (SET pH); (1) beginning condition: the initial pH value of gathering sample; Signal drift: close; Stand-by period 10s; Suspend 20s.(2) phenolphthalein alkalinity titration: the setting titration end-point is pH=8.3; Dynamically titration, range of control is 2pH; Maximum liquid feeding speed 10ml/min; Minimum liquid feeding speed 25 μ L/min; Stopping criterion: 50 μ L/min drift about.(3) total alkalinity titration: the setting titration end-point is pH=4.2; Dynamically titration, range of control is 1.5pH; Maximum liquid feeding speed 5ml/min; Minimum liquid feeding speed 25 μ L/min; Stopping criterion: 50 μ L/min drift about; The measurement point time interval: 2.0s.(4) temperature is 25 ℃.
Chlorion titration parameter is provided with: dynamic titration mode (DET U); (1) beginning condition: the initial measurement signal drift closes, minimum latency 5s, maximum latency 10s, liquid feeding speed 5mL/min; (2) titration parameter: accept measured value signal drift 30mV/min, minimum latency 2s, maximum latency 20s; Measurement point density 4; Smallest incremental 10 μ L, maximal increment closes, maximal value liquid feeding speed; (4) titration end-point: the prominent point more of first of silver electrode current potential.
Certainly, in other embodiment, the titration end-point of phenolphthalein alkalinity titration also can be set at pH=8.0, and the titration end-point of total alkalinity titration also can be set at pH=4.0; The titration end-point of phenolphthalein alkalinity titration also can be set at pH=8.3, and the titration end-point of total alkalinity titration also can be set at pH=4.3; The titration end-point of phenolphthalein alkalinity titration also can be set at pH=8.1, and the titration end-point of total alkalinity titration also can be set at pH=4.1.Other step is all identical with present embodiment, repeats no more at this.
Say that further the computing formula of present embodiment is specially:
PH value (25 ℃)=pH electrode is gathered the initial pH value of sample.(1-1)
Phenolphthalein alkalinity, mmol/L:
V wherein
1---the volumetric solution volume (mL) of sulfuric acid standard solution in the phenolphthalein alkalinity titration,
V
S---the setting volume of sample also is sample volume (mL),
C
1/2H2SO4---the concentration (mol/L) of sulfuric acid standard solution.
Total alkalinity, mmol/L:
V wherein
2---the volumetric solution volume (mL) of sulfuric acid standard solution in the total alkalinity titration,
V
S---the setting volume of sample also is sample volume (mL),
G
1/2H2SO4---the concentration (mol/L) of sulfuric acid standard solution.
Chlorine ion concentration [Cl
-], mg/L:
Wherein: V
0---reagent blank (mL),
V
3---the consumption volume (mL) of silver nitrate titer;
The titer (mg/mL) of T---silver nitrate titer,
V
S---the setting volume of sample also is sample volume (mL).
Say that further the check and analysis process is: measure sample that 60ml mixes in measuring cup, sulfuric acid concentration of standard solution C
1/2H2SO4=0.1000mol/L, silver nitrate standard solution titration degree T=3.696mg/mL, the reagent blank V of silver nitrate
0=0.010mL; Sulfuric acid standard solution and silver nitrate standard solution are added respectively in standard acid solution liquid feeding unit and the silver nitrate titer liquid feeding unit, and pH electrode and silver electrode are installed on the titration platform, have stirrer on the titration platform; The beginning titration; Titration process curve map such as Fig. 3, shown in Figure 4, Fig. 3 are the pH value mapping of the volumetric solution volume of sulfuric acid standard solution to sample, and Fig. 4 is that the volumetric solution volume of silver nitrate standard solution is mapped to the silver electrode potential value; Adopt 2 parallel titration in the present embodiment, the data of 2 parallel titration are seen table 1:
Table 1 potentiometric titration detects data
Need to prove that in the table 1, the consumption volume of phenolphthalein alkalinity is meant the volumetric solution volume V of sulfuric acid standard solution in the phenolphthalein alkalinity titration
1, the consumption volume of total alkalinity is meant the volumetric solution volume V of sulfuric acid standard solution in the total alkalinity titration
2, the consumption volume of chlorion is meant the consumption volume V of silver nitrate titer
3, the volumetric solution volume=V of silver nitrate titer
3-V
0According to the detection data of table 1,, calculate according to above-mentioned (1-1), (1-2), (1-3) and computing formula (1-4).The result of calculation of 2 parallel titration is seen table 2:
Table 2 is measured the result
Certainly, also can carry out the assay determination of pH value, phenolphthalein alkalinity, total alkalinity and the chlorine ion concentration of boiler feed water with the device of the utility model, step is identical with above-mentioned analytical approach step, repeats no more.
The utility model adopts bipolar electrode potentiometric titration system; Earlier carry out the basicity titration with sulfuric acid or nitric acid standard solution; Titration mode is for setting endpoint titration; Get the preceding initial pH value of titration and be testing sample pH value, setting pH8.0-8.3 is the phenolphthalein alkalinity terminal point, and setting pH4.0-4.3 is the phenolphthalein alkalinity terminal point.After the total alkalinity titration was accomplished, basic sample solution was adjusted to faintly acid, can directly utilize the silver nitrate standard solution to carry out the potentiometric titration of chlorion, and such sample is accomplished the mensuration of four projects successively.
Behind the quantitative sampling, earlier under the indication of pH electrode, with the pH value of sulfuric acid or salpeter solution titration to setting; In the silver electrode indication, carry out the potentiometric titration of chlorion again, obtain chlorine ion concentration with the silver nitrate standard solution.Adopt this method, in the pH value process of under the indication of pH electrode, extremely setting, obtain phenolphthalein alkalinity, total alkalinity, pH value with sulfuric acid or salpeter solution titration sample.Detailed process: through setting titration end-point is pH value 8.3-8.0, obtains the phenolphthalein alkalinity value of sample; Through setting titration end-point pH value=4.0-4.3, obtain the total alkalinity value of sample; Through the initial indicated value of pH electrode before the collection titration, obtain the pH value of sample.
Independently testing process is comprehensive becomes a testing process four of pH value, phenolphthalein alkalinity, total alkalinity and chlorine ion concentrations for the utility model, after the primary sample, accomplishes pH value, phenolphthalein alkalinity, total alkalinity and chlorine ion concentration detection successively.This process does not need to carry out separately the pH value and detects, also need be before the chlorion test adjusting pH value, in the test process shortening consuming time ten minutes; This utility model not only shortens detection time, improves the work efficiency of equipment, the consumption of also saving sample consumption and standard acid.
Combine accompanying drawing that the embodiment of the utility model is described above; But the utility model is not limited to above-mentioned embodiment, and above-mentioned embodiment only is schematically, rather than restrictive; Those of ordinary skill in the art is under the enlightenment of the utility model; Not breaking away under the scope situation that the utility model aim and claim protect, also can make a lot of forms, these all belong within the protection of the utility model.
Claims (7)
1. device of analyzing continuously pH value, phenolphthalein alkalinity, total alkalinity and chlorine ion concentration; The pH value, phenolphthalein alkalinity, total alkalinity and the chlorine ion concentration that are used for titrimetry industrial circulating cooling water and boiler feed water; It is characterized in that; Comprise: the potentiometric titrimeter main frame that has the bipolar electrode interface; One electrode interface is connected with the pH electrode (1) of the real-time pH value of the initial pH value that is used to gather sample and phenolphthalein alkalinity and total alkalinity titration process, and ccontaining standard acid solution, is used for the standard acid solution liquid feeding unit (2) that phenolphthalein alkalinity and total alkalinity titration process drip the standard acid solution; Another electrode interface is connected with the silver electrode (3) of the silver electrode potential value of in the sample that the total alkalinity titration finishes, gathering chlorion potentiometric titration process; This device also comprises: ccontaining silver nitrate titer, be used for the silver nitrate titer liquid feeding unit (4) that chlorion potentiometric titration process drips the silver nitrate titer, and the control system of being located in the said potentiometric titrimeter main frame, carrying out control of titration parameter and data output.
2. the device of continuous analysis pH value according to claim 1, phenolphthalein alkalinity, total alkalinity and chlorine ion concentration is characterized in that this device also comprises titration platform.
3. the device of continuous analysis pH value according to claim 2, phenolphthalein alkalinity, total alkalinity and chlorine ion concentration is characterized in that said titration platform is provided with stirrer.
4. the device of continuous analysis pH value according to claim 1, phenolphthalein alkalinity, total alkalinity and chlorine ion concentration; It is characterized in that; Also be provided with the communication interface that is connected with computing machine on the said potentiometric titrimeter main frame; Said control system is connected with computing machine through said communication interface, carries out the computing machine instant playback of phenolphthalein alkalinity titration, total alkalinity titration, chlorion potentiometric titration titration data.
5. the device of continuous analysis pH value according to claim 1, phenolphthalein alkalinity, total alkalinity and chlorine ion concentration is characterized in that this device also comprises the measuring cup (5) of the sample of ccontaining setting volume.
6. the device of continuous analysis pH value according to claim 1, phenolphthalein alkalinity, total alkalinity and chlorine ion concentration is characterized in that, also is provided with the control panel that is connected with said control system on the said potentiometric titrimeter main frame.
7. the device of continuous analysis pH value according to claim 1, phenolphthalein alkalinity, total alkalinity and chlorine ion concentration; It is characterized in that this device also comprises pH electrode protection unit and the silver electrode protected location of analyzing finish ccontaining respectively and fixing said pH electrode (1) and silver electrode (3).
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| CN2012200631221U CN202453323U (en) | 2012-02-24 | 2012-02-24 | Device for continuously analyzing pH (potential of hydrogen) value, phenolphthalein alkalinity, total alkalinity and chlorine ion concentration |
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| CN102590318A (en) * | 2012-02-24 | 2012-07-18 | 深圳市特种设备安全检验研究院 | Method and device for continuously analyzing pH value, phenolphthalein end-point alkalinity, total alkalinity and chloridion concentration |
| CN104807951A (en) * | 2015-04-30 | 2015-07-29 | 苏州承乐电子科技有限公司 | Potentiometric titrator device |
| WO2016008369A1 (en) * | 2014-07-15 | 2016-01-21 | 广州特种承压设备检测研究院 | Multiple item continuous automatic analysis apparatus for industrial boiler water quality testing and analysis method therefor |
| CN109856202A (en) * | 2019-01-28 | 2019-06-07 | 中国科学院烟台海岸带研究所 | It is a kind of measure seawater total alkalinity paper base Copper diethlydithiocarbamate and its application |
| CN110632335A (en) * | 2019-10-12 | 2019-12-31 | 吉林省农业科学院 | Full-automatic system for batch determination of pH value |
| CN112630374A (en) * | 2020-12-30 | 2021-04-09 | 山西华兴铝业有限公司 | Automatic potentiometric titration detection method for analyzing content of effective calcium oxide in lime |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102590318A (en) * | 2012-02-24 | 2012-07-18 | 深圳市特种设备安全检验研究院 | Method and device for continuously analyzing pH value, phenolphthalein end-point alkalinity, total alkalinity and chloridion concentration |
| CN102590318B (en) * | 2012-02-24 | 2014-06-11 | 深圳市特种设备安全检验研究院 | Method and device for continuously analyzing pH value, phenolphthalein end-point alkalinity, total alkalinity and chloridion concentration |
| WO2016008369A1 (en) * | 2014-07-15 | 2016-01-21 | 广州特种承压设备检测研究院 | Multiple item continuous automatic analysis apparatus for industrial boiler water quality testing and analysis method therefor |
| CN104807951A (en) * | 2015-04-30 | 2015-07-29 | 苏州承乐电子科技有限公司 | Potentiometric titrator device |
| CN109856202A (en) * | 2019-01-28 | 2019-06-07 | 中国科学院烟台海岸带研究所 | It is a kind of measure seawater total alkalinity paper base Copper diethlydithiocarbamate and its application |
| CN110632335A (en) * | 2019-10-12 | 2019-12-31 | 吉林省农业科学院 | Full-automatic system for batch determination of pH value |
| CN112630374A (en) * | 2020-12-30 | 2021-04-09 | 山西华兴铝业有限公司 | Automatic potentiometric titration detection method for analyzing content of effective calcium oxide in lime |
| CN112858573A (en) * | 2021-01-21 | 2021-05-28 | 西安热工研究院有限公司 | High-turbidity water chloride ion online measurement system and method based on potentiometric titration method |
| CN114965861A (en) * | 2021-02-20 | 2022-08-30 | 宝山钢铁股份有限公司 | Method and device for jointly measuring concentration of sulfuric acid and zinc ions in electrogalvanizing solution |
| CN114965861B (en) * | 2021-02-20 | 2023-10-17 | 宝山钢铁股份有限公司 | Method and device for jointly measuring concentration of sulfuric acid and zinc ions in electrogalvanizing solution |
| CN113702473A (en) * | 2021-08-26 | 2021-11-26 | 中国科学院青岛生物能源与过程研究所 | Method for measuring alkalinity of surfactant based on potentiometric titration method |
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