CN101975865A - Automatic titration system for acid or alkali liquor - Google Patents
Automatic titration system for acid or alkali liquor Download PDFInfo
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- CN101975865A CN101975865A CN 201010508698 CN201010508698A CN101975865A CN 101975865 A CN101975865 A CN 101975865A CN 201010508698 CN201010508698 CN 201010508698 CN 201010508698 A CN201010508698 A CN 201010508698A CN 101975865 A CN101975865 A CN 101975865A
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- titration
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- alkali liquid
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- 238000004448 titration Methods 0.000 title claims abstract description 128
- 239000002253 acid Substances 0.000 title claims abstract description 73
- 239000003513 alkali Substances 0.000 title claims abstract description 68
- 239000007788 liquid Substances 0.000 claims description 67
- 239000001257 hydrogen Substances 0.000 claims description 23
- 229910052739 hydrogen Inorganic materials 0.000 claims description 23
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 13
- 239000002699 waste material Substances 0.000 claims description 11
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims description 10
- 238000003756 stirring Methods 0.000 claims description 4
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 2
- 238000005259 measurement Methods 0.000 abstract description 6
- 238000001514 detection method Methods 0.000 abstract 4
- 101100327917 Caenorhabditis elegans chup-1 gene Proteins 0.000 description 26
- 238000000034 method Methods 0.000 description 9
- 238000012360 testing method Methods 0.000 description 5
- 238000004458 analytical method Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000003814 drug Substances 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 241000196324 Embryophyta Species 0.000 description 1
- 241000220317 Rosa Species 0.000 description 1
- 238000002479 acid--base titration Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000007429 general method Methods 0.000 description 1
- 238000005984 hydrogenation reaction Methods 0.000 description 1
- 238000003760 magnetic stirring Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
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Abstract
The invention provides an automatic titration system for acid or alkali liquor. The automatic titration system for the acid or alkali liquor comprises a measurement cup (1), a pH detection device (2), an acid or alkali liquor titration cup (3), a titration control valve (4) and a controller (5), wherein the measurement cup (1) is used for accommodating solution to be measured; the pH detection device (2) is placed in the measurement cup (1) to detect the pH of the solution to be measured and provided with a signal output end for outputting a pH signal representing the detected pH; the acid or alkali liquor titration cup (3) is provided with a titration pipeline (12) and used for titrating acid or alkali liquor into the measurement cup (1); the titration control valve (4) is connected on the titration pipeline (12) and provided with a control end; and the controller (5) is electrically connected with the signal output end of the pH detection device (2) and the control end of the titration control valve (4) and used for opening the titration control valve (4) and closing the titration control valve (4) when the received pH signal from the pH detection device (2) indicates reaching a titration final point. The system realizes automatic titration of the acid or alkali liquor, and greatly saves the manpower.
Description
Technical field
The present invention relates to chemical analysis and automatic field, be specifically related to the automatic titration system of a kind of acid ﹠ alkali liquid.
Background technology
In analysis of experiments or engineering application process, often need by Titrable acid alkali lye in solution to be measured, to come solution is measured.The general method that adopts manual titration in the prior art, artificial monitoring titration process, often titration process control is inaccurate, cause the measurement result error big, and efficient is not high, is difficult to realize real-time monitoring.
Summary of the invention
At problems such as manual titration efficient are not high in the prior art, error is big, the invention provides the automatic titration system of a kind of acid ﹠ alkali liquid.
According to an aspect of the present invention, the invention provides the automatic titration system of a kind of acid ﹠ alkali liquid, the automatic titration system of this acid ﹠ alkali liquid comprises:
Measuring cup is used for splendid attire solution to be measured;
Acidity-basicity tester is placed in the described measuring cup detecting the potential of hydrogen of solution to be measured, and has the potential of hydrogen signal of signal output part with the detected potential of hydrogen of output representative;
The acid ﹠ alkali liquid titration cup has the titration pipeline, is used for to measuring cup Titrable acid alkali lye;
The titration operation valve is connected on the described titration pipeline, and has control end;
Controller, be electrically connected with the signal output part of described acidity-basicity tester and the control end of titration operation valve, be used to open the titration operation valve and when the potential of hydrogen signal indicating from acidity-basicity tester that receives arrives titration end-point, close the titration operation valve.
The automatic titration system of the acid ﹠ alkali liquid that the application of the invention provides is by being provided with acidity-basicity tester, thereby can by controller in real time monitoring solution to be measured potential of hydrogen and and then the titration of control acid ﹠ alkali liquid, realize the automatic titration of acid ﹠ alkali liquid, saved manpower greatly, and can guarantee titration accuracy, made things convenient for the staff to carry out further analytical applications.
Description of drawings
Fig. 1 is the synoptic diagram according to the automatic titration system of acid ﹠ alkali liquid provided by the invention;
The synoptic diagram of the acid ﹠ alkali liquid titration system that Fig. 2 provides for a preferred embodiment of the invention;
Fig. 3 is the synoptic diagram according to acid ﹠ alkali liquid titration cup provided by the invention.
Embodiment
The present invention is further illustrated below in conjunction with accompanying drawing.
As shown in Figure 1, the automatic titration system 100 of acid ﹠ alkali liquid provided by the invention comprises: measuring cup 1 is used for splendid attire solution to be measured; Acidity-basicity tester 2 is placed in the described measuring cup 1 detecting the potential of hydrogen of solution to be measured, and has the potential of hydrogen signal of signal output part with the detected potential of hydrogen of output representative; Acid ﹠ alkali liquid titration cup 3 has titration pipeline 12, is used for to measuring cup 1 Titrable acid alkali lye; Titration operation valve 4 is connected on the described titration pipeline 12, and has control end; Controller 5, be electrically connected with the signal output part of described acidity-basicity tester 2 and the control end of titration operation valve 4, be used to open titration operation valve 4 and when the potential of hydrogen signal indicating from acidity-basicity tester 2 that receives arrives titration end-point, close titration operation valve 4.
Wherein said measuring cup 1 can be conventionally used for the container of splendid attire solution to be measured, can seal, and also can not seal, and volume can be selected according to concrete needs.
For the solution after the titration is in time discharged, as shown in Figure 2, the automatic titration system 100 of this acid ﹠ alkali liquid can also comprise waste discharge slot 10, be positioned at the below of described measuring cup 1, and described measuring cup 1 also has waste discharge pipeline 13, be connected the bottom of measuring cup 1, be used for the solution after the titration is discharged to waste discharge slot 10.In order to control the waste discharge process, the automatic titration system 100 of this acid ﹠ alkali liquid can also comprise solenoid valve 8, this solenoid valve 8 is arranged in the waste discharge pipeline 13, and this solenoid valve 8 has control end, control end is electrically connected with described controller 5, after titration is finished (being that controller 5 cuts out after the titration operation valve 4), controller 5 is opened this solenoid valve 8, makes that the solution in the measuring cup 1 flows out.
As shown in Figure 2, preferably, this acid ﹠ alkali liquid titration system 100 can also comprise the U trap 7 that inserts from measuring cup 1 bottom, be used for testing liquid siphon with measuring cup 1 to predetermined altitude, thereby reach the purpose of location, in order to avoid testing liquid need be wasted too much Titrable acid alkali lye too much and be convenient to accurately measure.Wherein to be positioned at an end of measuring cup 1 be a bend pipe to this U trap 7.The mouth of pipe that U trap 7 is positioned at measuring cup 1 can be higher than measuring cup 1 bottom, wherein this U trap 1 height of being positioned at mouth of pipe range observation cup 1 bottom of measuring cup 1 can be provided with according to concrete needs, for example can be provided with according to the volume of testing liquid in the measuring cup 1, the volume of measuring cup 1 etc., for instance, can this mouth of pipe be set to 4.0-4.5cm apart from the height of measuring cup 1 bottom.The mouth of pipe that U trap 7 is positioned at measuring cup 1 is the predetermined altitude of measuring cup 1 testing liquid apart from the height of measuring cup 1 bottom.Another mouth of pipe of U trap 7 can be inserted into the waste discharge slot 10 that is arranged in measuring cup 1 below, thereby the solution of sucking-off can flow in this waste discharge slot 10.
As shown in Figure 2, in order to make the acid ﹠ alkali liquid of testing liquid and titration fully react, preferably, described acid ﹠ alkali liquid titration system 100 can also comprise the stirring apparatus 6 that is positioned at measuring cup 1 inner bottom part, be used to stir solution to be measured, for example described stirring apparatus 6 can be magnetic stirring apparatus.
Described acidity-basicity tester 2 can be used for measuring the potential of hydrogen of the solution of described measuring cup 1, and send the potential of hydrogen signal to described controller 5, for example can be acidometer conventional in the prior art, acidity sensor, acidity analyser, acidity measurement instrument or the like, be preferably pH electrode, described potential of hydrogen signal can be signals such as pH value.
Described acid ﹠ alkali liquid titration cup 3 is used for Titrable acid alkali lye in the solution to be measured of measuring cup 1.As shown in Figure 3, the present invention also provides a kind of acid ﹠ alkali liquid titration cup 3 that can the acid ﹠ alkali liquid constant volume.Because because the acid ﹠ alkali liquid volume in the acid ﹠ alkali liquid titration cup can constantly change in the titration process, make the acid ﹠ alkali liquid instability of flow that oozes, thereby bring than mistake, so if acid ﹠ alkali liquid constant volume then make the acid ﹠ alkali liquid stability of flow to analysis result.
Wherein, described acid solution titration cup 3 comprises titration cup cup 20, dosing pipe 22, titration pipeline 12 and constant level control part, described titration cup cup 20 has dosing mouth 21, titration pipeline 12 is connected to titration cup cup 20 belows, described constant level control part comprises siphunculus 23 that is positioned at dosing mouth 21 and the float-actuated valve 24 that is positioned at titration cup cup 20 inside, described dosing pipe 22 inserts an end of described siphunculus 23, and the opening shape that described siphunculus 23 is positioned at the other end of titration cup cup 20 inside cooperates with float-actuated valve 24 so that the opening of this end of described siphunculus 23 can be sealed by float-actuated valve 24.
Described titration cup cup 20 is the conventional container that is used for the splendid attire acid ﹠ alkali liquid, and its volume can be selected according to concrete needs.The cup internal gas pressure makes that less than the air pressure outside the cup acid ﹠ alkali liquid is difficult for flowing out after oozing acid ﹠ alkali liquid, alternatively, the upper surface of described titration cup cup 20 or side can have vent port 28, equate to keep titration cup cup 20 inner and outer air pressures, make acid ﹠ alkali liquid smooth and easyly to ooze.
Described dosing mouth 21 can be positioned at the upper surface of titration cup cup 20, is used for placing the siphunculus 23 of constant level control part.
Described titration pipeline 12 is used for acid ﹠ alkali liquid is titrated to solution to be measured.Wherein when solution to be measured when being acid, what the solution in the titration cup cup 20 can be for alkalescence; Otherwise, when solution to be measured is when alkalescence, what the solution in the titration cup cup 20 can be for acidity.
Described constant level control part mainly comprises two parts, siphunculus 23 and float-actuated valve 24.Described float-actuated valve 24 can various float-actuated valves, and preferably, more accurate to the control of liquid level in order to make, described float-actuated valve 24 can be the aciculiform float-actuated valve.As shown in Figure 3, described float-actuated valve 24 comprises float 25, spacing ring 26 and gravitational equilibrium piece 27, spacing ring 26 is connected with the end that described siphunculus 23 is positioned at titration cup cup 20, and float 25 1 ends are conical, and the other end passes described spacing ring 26 and is connected to described gravitational equilibrium piece 27.Wherein spacing ring 26 makes float 25 float between siphunculus 23 and spacing ring 26, and gravitational equilibrium piece 27 makes float 25 keep vertically, controls described float 25 and keeps balance, is beneficial to acid ﹠ alkali liquid and oozes equably.
The opening shape that siphunculus 23 is positioned at an end of titration cup cup 20 matches with the shape of float 25, as shown in Figure 2, float 25 be shaped as taper shape, then the opening of siphunculus 23 is the circular cone inclined-plane.It is relevant that the length of siphunculus 23 and the height of constant level are provided with, and for example, the length that siphunculus 23 can be positioned at an end of titration cup cup 20 usually is arranged to 2.0-3.0cm.
When using this acid ﹠ alkali liquid titration cup 3 provided by the invention, dosing pipe 22 can be connected with medicine container 11 (see figure 2)s that add that acid ﹠ alkali liquid is housed, add medicine container 11 and can be routine chemicals dosing plant, add explosive barrel, dosing pump, acid ﹠ alkali liquid savings box or the like.
This acid ﹠ alkali liquid titration cup 3 provided by the invention is when the liquid level in the titration cup cup 20 descends, float 25 in the float-actuated valve 24 can descend along with liquid level, have space between float 25 and the siphunculus 23 this moment, makes the acid ﹠ alkali liquid that adds in the medicine container 11 inject titration cup cup 20 by dosing pipe 22.And when the acid ﹠ alkali liquid liquid level rose, float 25 rose thereupon, thereby can seal the opening of siphunculus 23 bottoms, and acid ﹠ alkali liquid just can not flow in the titration cup cup 20, thereby can keep the liquid level of acid ﹠ alkali liquid constant, made acid ﹠ alkali liquid to ooze equably.
Described titration operation valve 4 is positioned on the titration path 12, can be solenoid valve, by controller 5 its opening and closing of control.
The course of work of controller 5 is described below.Be set with titration end-point (as PH=7) in the described controller 5, at first controller 5 control titration operation valves 4 are opened, with the beginning acid base titration, and the potential of hydrogen of reception acidity-basicity tester 2 real-time detected solution to be measured.When receiving the potential of hydrogen signal of the potential of hydrogen of representing solution to be measured, determine the potential of hydrogen of solution to be measured according to this signal, and with this potential of hydrogen and titration end-point comparison, when the indicated potential of hydrogen of the potential of hydrogen signal that receives was identical with titration end-point, control titration operation valve 4 was closed.Under the preferable case, when this system 100 also has under the situation of above-mentioned preferred solenoid valve 8, controller 5 and then open solenoid valve 8 to discharge the solution after the titration.
In addition, the amount of the acid ﹠ alkali liquid that splashes in order to calculate in the titration process, under the preferable case, also timing simultaneously when controller 5 is opened titration operation valve 4, and when closing titration operation valve 4, stop timing, because the rate of titration of acid ﹠ alkali liquid titration cup 3 is fixed, so controller 5 can be according to calculating the soda acid liquid measure that splashes between institute's timing.
Described controller 5 can pass through realizations such as integrated circuit, DSP, single-chip microcomputer, PLC.
The automatic titration system of the acid ﹠ alkali liquid that the application of the invention provides realizes that in real time titration is controlled to acid ﹠ alkali liquid, has saved manpower greatly, and can guarantee titration accuracy, made things convenient for the staff to carry out further analytical applications.The present invention can be widely used in chemical analysis field, it is to monitor at the water quality stability of field process waters such as electric power, petrochemical complex, metallurgy that a kind of typical case uses, process water is packed in the measuring cup 1, the acidity of measuring process water in the acid ﹠ alkali liquid titration process according to acid ﹠ alkali liquid titration system provided by the invention changes, and then the stability of analytical industry water.
Claims (11)
1. the automatic titration system of acid ﹠ alkali liquid (100), the automatic titration system of described acid ﹠ alkali liquid (100) comprising:
Measuring cup (1) is used for splendid attire solution to be measured;
Acidity-basicity tester (2) is placed in the described measuring cup (1) detecting the potential of hydrogen of solution to be measured, and has the potential of hydrogen signal of signal output part with the detected potential of hydrogen of output representative;
Acid ﹠ alkali liquid titration cup (3) has titration pipeline (12), is used for to measuring cup (1) Titrable acid alkali lye;
Titration operation valve (4) is connected on the described titration pipeline (12), and has control end;
Controller (5), be electrically connected with the signal output part of described acidity-basicity tester (2) and the control end of titration operation valve (4), be used to open titration operation valve (4) and when the potential of hydrogen signal indicating from acidity-basicity tester (2) that receives arrives titration end-point, close titration operation valve (4).
2. system according to claim 1, wherein, the automatic titration system of described acid ﹠ alkali liquid (100) also comprises waste discharge slot (10), is positioned at the below of described measuring cup (1), and described measuring cup (1) also has waste discharge pipeline (13), is used for the solution after the titration is discharged to waste discharge slot (10).
3. system according to claim 2, wherein, the automatic titration system of described acid ﹠ alkali liquid (100) also comprises solenoid valve (8), this solenoid valve (8) is arranged in the waste discharge pipeline (13), and this solenoid valve (8) has control end, this control end is electrically connected with described controller (5), and after described controller (5) cut out titration operation valve (4), controller (5) was opened this solenoid valve (8).
4. system according to claim 1, wherein, described acid ﹠ alkali liquid titration system (100) also comprises the U trap (7) that inserts from measuring cup (1) bottom.
5. system according to claim 4, wherein, the mouth of pipe that described U trap (7) is positioned at measuring cup (1) is higher than measuring cup (1) bottom.
6. system according to claim 1, wherein, described acid ﹠ alkali liquid titration system (100) also comprises the stirring apparatus (6) that is positioned at measuring cup (1) inner bottom part.
7. system according to claim 1, wherein, described acidity-basicity tester (2) is a pH electrode.
8. system according to claim 1, wherein, described acid solution titration cup (3) comprises titration cup cup (20), dosing pipe (22), titration pipeline (12) and constant level control part, described titration cup cup (20) has dosing mouth (21), titration pipeline (12) is connected to titration cup cup (20) below, described constant level control part comprises the siphunculus (23) that is positioned at dosing mouth (21) and is positioned at the inner float-actuated valve (24) of titration cup cup (20), described dosing pipe (22) inserts an end of described siphunculus (23), and the opening shape that described siphunculus (23) is positioned at the inner other end of titration cup cup (20) cooperates with float-actuated valve (24) so that the opening of this end of described siphunculus (23) can be sealed by float-actuated valve (24).
9. system according to claim 8, wherein, described float-actuated valve (24) is the aciculiform float-actuated valve.
10. system according to claim 9, wherein, described float-actuated valve (24) comprises float (25), spacing ring (26) and gravitational equilibrium piece (27), spacing ring (26) is connected with the end that described siphunculus (23) is positioned at titration cup cup (20), float (25) one ends are conical, and the other end passes described spacing ring (26) and is connected to described gravitational equilibrium piece (27).
11. system according to claim 1, wherein, also timing simultaneously when controller (5) is opened titration operation valve (4), and when closing titration operation valve (4), stop timing, controller (5) is according to calculating the soda acid liquid measure that splashes between institute's timing.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010508698A CN101975865B (en) | 2010-10-09 | 2010-10-09 | Automatic titration system for acid or alkali liquor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010508698A CN101975865B (en) | 2010-10-09 | 2010-10-09 | Automatic titration system for acid or alkali liquor |
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| CN101975865B CN101975865B (en) | 2012-09-05 |
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Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102253164A (en) * | 2011-04-26 | 2011-11-23 | 东北电力大学 | Water alkalinity on-line measuring device based on solution image technology and measuring method thereof |
| CN102967685A (en) * | 2012-11-09 | 2013-03-13 | 青海电力科学试验研究院 | Method for judging titration end point in acidity test of sulfur hexafluoride (SF6) gas |
| CN103364523A (en) * | 2013-07-05 | 2013-10-23 | 北京化工大学 | On-line volatile acid monitoring system |
| CN103424529A (en) * | 2012-05-22 | 2013-12-04 | 韩国地质资源研究院 | Unmanned automatic alkalinity measuring system and method |
| CN104198647A (en) * | 2014-08-15 | 2014-12-10 | 湖州科诺水处理化工原料有限公司 | Water quality stability index analyzer |
| CN104280513A (en) * | 2014-08-07 | 2015-01-14 | 湖州科诺水处理化工原料有限公司 | Reaction tank for water sample detection |
| CN105116098A (en) * | 2015-09-10 | 2015-12-02 | 中国家用电器研究院 | Automatic titration method and application |
| CN105301172A (en) * | 2015-11-15 | 2016-02-03 | 常州大学 | Direct-connection rotating operation-terminal sodium hydroxide calibration device of sulphur determination device |
| CN105353156A (en) * | 2015-12-16 | 2016-02-24 | 济南海能仪器股份有限公司 | Full-automatic analyzer |
| CN105651932A (en) * | 2016-04-13 | 2016-06-08 | 中国水产科学研究院黄海水产研究所 | Titrimetric analysis method |
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| CN102253164A (en) * | 2011-04-26 | 2011-11-23 | 东北电力大学 | Water alkalinity on-line measuring device based on solution image technology and measuring method thereof |
| CN102253164B (en) * | 2011-04-26 | 2014-12-17 | 东北电力大学 | Water alkalinity on-line measuring device based on solution image technology and measuring method thereof |
| CN103424529A (en) * | 2012-05-22 | 2013-12-04 | 韩国地质资源研究院 | Unmanned automatic alkalinity measuring system and method |
| CN102967685A (en) * | 2012-11-09 | 2013-03-13 | 青海电力科学试验研究院 | Method for judging titration end point in acidity test of sulfur hexafluoride (SF6) gas |
| CN103364523B (en) * | 2013-07-05 | 2015-11-04 | 北京化工大学 | Volatile acid on-line monitoring system |
| CN103364523A (en) * | 2013-07-05 | 2013-10-23 | 北京化工大学 | On-line volatile acid monitoring system |
| CN104280513A (en) * | 2014-08-07 | 2015-01-14 | 湖州科诺水处理化工原料有限公司 | Reaction tank for water sample detection |
| CN104280513B (en) * | 2014-08-07 | 2016-08-24 | 湖州科诺水处理化工原料有限公司 | A kind of water sample detection reaction tank |
| CN104198647A (en) * | 2014-08-15 | 2014-12-10 | 湖州科诺水处理化工原料有限公司 | Water quality stability index analyzer |
| CN105116098A (en) * | 2015-09-10 | 2015-12-02 | 中国家用电器研究院 | Automatic titration method and application |
| CN105301172A (en) * | 2015-11-15 | 2016-02-03 | 常州大学 | Direct-connection rotating operation-terminal sodium hydroxide calibration device of sulphur determination device |
| CN105353156A (en) * | 2015-12-16 | 2016-02-24 | 济南海能仪器股份有限公司 | Full-automatic analyzer |
| TWI561307B (en) * | 2016-02-05 | 2016-12-11 | Birdie Classic Co Ltd | Automatic Titrating System |
| CN105651932A (en) * | 2016-04-13 | 2016-06-08 | 中国水产科学研究院黄海水产研究所 | Titrimetric analysis method |
| CN105806994A (en) * | 2016-05-08 | 2016-07-27 | 柴永朋 | Automatic potentiometric titrator |
| CN105806994B (en) * | 2016-05-08 | 2017-10-10 | 柴永朋 | Automatic potentiometric titrator |
| CN106092798A (en) * | 2016-08-05 | 2016-11-09 | 陕西科技大学 | A kind of experimental provision studying the lower friction test of titrimetry sea water lubrication and method |
| CN109459430A (en) * | 2018-12-06 | 2019-03-12 | 广东海洋大学 | A kind of acid base titration device and titration method |
| CN109459430B (en) * | 2018-12-06 | 2024-02-06 | 广东海洋大学 | Acid-base titration device and titration method |
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| CN113670665A (en) * | 2020-05-13 | 2021-11-19 | 力合科技（湖南）股份有限公司 | Liquid caustic soda analysis system |
| CN113670665B (en) * | 2020-05-13 | 2024-05-31 | 力合科技（湖南）股份有限公司 | Liquid alkali analysis system |
| CN112379040A (en) * | 2021-01-07 | 2021-02-19 | 石家庄凯禄贸易有限公司 | Equipment special for simultaneously carrying out titration assay on multiple test tubes |
| CN112379040B (en) * | 2021-01-07 | 2022-10-04 | 广州达安生物科技有限公司 | Equipment special for simultaneously carrying out titration assay on multiple test tubes |
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