CN112834689A - Automatic titration device based on photoelectric signal conduction control - Google Patents
Automatic titration device based on photoelectric signal conduction control Download PDFInfo
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- CN112834689A CN112834689A CN202110279915.0A CN202110279915A CN112834689A CN 112834689 A CN112834689 A CN 112834689A CN 202110279915 A CN202110279915 A CN 202110279915A CN 112834689 A CN112834689 A CN 112834689A
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- beaker
- control panel
- titration
- heating plate
- burette
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- 238000004448 titration Methods 0.000 title claims abstract description 46
- 238000010438 heat treatment Methods 0.000 claims abstract description 21
- 239000011810 insulating material Substances 0.000 claims description 4
- 230000005611 electricity Effects 0.000 claims description 2
- 230000019491 signal transduction Effects 0.000 claims 1
- 238000002474 experimental method Methods 0.000 abstract description 10
- 230000000149 penetrating effect Effects 0.000 abstract description 2
- 239000000243 solution Substances 0.000 description 33
- 238000000034 method Methods 0.000 description 17
- 239000012286 potassium permanganate Substances 0.000 description 8
- 239000007788 liquid Substances 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 239000011259 mixed solution Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- ZNCPFRVNHGOPAG-UHFFFAOYSA-L sodium oxalate Chemical compound [Na+].[Na+].[O-]C(=O)C([O-])=O ZNCPFRVNHGOPAG-UHFFFAOYSA-L 0.000 description 2
- 229940039790 sodium oxalate Drugs 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000012086 standard solution Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N31/00—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods
- G01N31/16—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods using titration
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N31/00—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods
- G01N31/16—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods using titration
- G01N31/18—Burettes specially adapted for titration
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Molecular Biology (AREA)
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
Abstract
The invention discloses an automatic titration device based on photoelectric signal conduction control, which comprises a burette arranged on a support frame, wherein a beaker is arranged below the burette and is arranged on a control device, the control device comprises a control panel and a heating plate, the beaker is arranged on the heating plate, the control panel is provided with a display screen for displaying the titration amount and the concentration, an electromagnetic valve is arranged at the outlet of the lower end of the burette, a color sensor electrically connected with the electromagnetic valve is arranged in the beaker, the inner wall of the burette is provided with a lead, two ends of the lead are connected to an external power supply and an ammeter which are connected in series after penetrating out from the side wall of the beaker, and a button for controlling the heating plate to be heated and the power supply to be conducted is also arranged on the control panel. The precision of the experiment is improved.
Description
Technical Field
The invention relates to a titration apparatus, in particular to an automatic titration apparatus.
Background
Many scenes in industrial production or scientific research experiments require that the change condition of substances in a solution be continuously measured in a certain period, and the change condition relates to the process of solution titration, for example, a method for measuring the potassium permanganate salt index in the solution, namely an acid potassium permanganate method, is specified according to the water quality potassium permanganate salt measuring method (GB 11892-89) of the people's republic of China, and the currently common method is as follows: adding known amounts of potassium permanganate and sulfuric acid into a sample, heating in a boiling water bath for 30min, oxidizing organic matters and reducing inorganic matters in the sample by potassium permanganate, adding excessive sodium oxalate to reduce residual potassium permanganate after reaction, and then back-dripping excessive sodium oxalate by a potassium permanganate standard solution to obtain the permanganate index of the sample through calculation. In the titration process, the erlenmeyer flask containing the solution to be measured needs to be shaken repeatedly to ensure that the two solutions are fully mixed in the titration process.
The method has high requirement on the operation precision of scientific research personnel, and the problem of overdetermination is easily caused because the color change reaction characteristic is not obvious enough and the operator is difficult to identify in the experimental process.
In a traditional titration experiment, the reading of a burette needs to be read before and after titration, and errors are easily caused due to manual reading.
In titration experiments, such as titration experiments of potassium permanganate, titration of a solution to be tested must be carried out at a high temperature of 60-80 ℃, and certain heat preservation measures are required.
In view of the above problems, the inventors have integrated and improved a solution titration apparatus/method. After improvement, the titration speed and precision can be improved, the reading error can be reduced when the scale of the titration liquid dosage is read, and the experimental precision is improved; meanwhile, the heating plate below the titration process can ensure that the solution is always kept within the temperature range required by the experiment in the experiment process.
Disclosure of Invention
The invention aims to provide an automatic titration device based on photoelectric signal conduction control, which solves the problems of unobvious color change reaction, low precision of manual reading and no message measure in the existing manual observation and improves the experimental precision.
The purpose of the invention is realized as follows: the utility model provides an automatic titration outfit based on photoelectric signal conduction control, is including setting up the buret on the support frame, and the below of buret is provided with the beaker, the beaker is placed on controlling means, controlling means includes control panel and heating plate, the beaker is placed on the heating plate, the last display screen that shows titration amount and concentration that is equipped with of control panel, buret lower extreme exit is provided with the solenoid valve, be equipped with in the beaker with the color sensor that the solenoid valve electricity is connected, be equipped with the wire on the inner wall of buret, the both ends of wire are worn out the back from the beaker lateral wall and are connected on the external power supply and the ampere meter of establishing ties, the last button that still is equipped with control heating plate heating and power and switches on of control panel.
When the titration device works, a solution to be titrated is added into the burette, the electromagnetic valve is opened to enable the solution to be added into the beaker from the burette to be mixed with the solution in the beaker, the heating disc is opened at the same time, the color change of the solution is monitored through the color sensor, and after the mixed solution reaches a set color, the electromagnetic valve is controlled to be closed to stop titration; meanwhile, the amount of the solution dripped can be accurately collected by matching the lead with an external power supply and an ammeter, so that the subsequent further calculation can be conveniently carried out.
Compared with the prior art, the invention has the beneficial effects that: the invention has simple structure, convenient operation and high automation degree, can improve the experimental efficiency while ensuring the experimental precision, can also keep the temperature required by the solution to be tested in the titration process, and improves the experimental precision; the method specifically comprises the following steps:
1. the experimental end point can be more accurately judged through the color sensor, and errors caused by the fact that color reaction is not obvious enough and is difficult to identify by scientific research personnel are avoided;
2. the titration process slowly decreases along with the change of the liquid level, at the moment, the electric signal monitored by an ammeter in the circuit also changes (along with the change of the resistance value), the monitored current signal is transmitted to a data processing system, and the current change value is converted into the volume consumed by the titration solution in a set program, so that the error caused by repeatedly reading the scales of the burette in the traditional titration experiment can be effectively avoided;
3. through the heating plate below the beaker, the solution to be measured can be kept within the temperature range required by the experiment all the time in the titration process.
As a further limitation of the invention, the burette is made of a completely insulating material. The burette is made of completely insulating materials, so that the accuracy of electric signal acquisition can be ensured.
As a further limitation of the invention, the bottom of the beaker is provided with a magnetic stirrer, and a controller of the magnetic stirrer is arranged on the control panel. The workload of experiment operators can be effectively reduced through the magnetic stirrer; meanwhile, the error caused by insufficient shaking, insufficient mixing of the titration solution and the solution to be detected and the like can be avoided.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic view of the structure of the present invention.
FIG. 2 is a schematic view of the structure of the burette of the present invention.
FIG. 3 is an enlarged view of a control panel according to the present invention.
The automatic color mixing device comprises a support frame 1, a burette 2, a beaker 3, a control panel 4, a display screen 4a, buttons 4b and 4c, a controller 4d, a heating plate 5, an electromagnetic valve 6, a color sensor 7, a lead 8, an external power supply 9, an ammeter 10 and a magnetic stirrer 11.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1-3, an automatic titration apparatus based on photoelectric signal conduction control comprises a burette 2 disposed on a support frame 1, the burette 2 is made of a completely insulating material, a beaker 3 is disposed under the burette 2, the beaker 3 is disposed on a control device, the control device comprises a control panel 4 and a heating plate 5, the beaker 3 is disposed on the heating plate 5, a display screen 4a for displaying titration amount and concentration is disposed on the control panel 4, an electromagnetic valve 6 is disposed at an outlet of a lower end of the burette 2, a color sensor 7 electrically connected to the electromagnetic valve 6 is disposed in the beaker 3, a wire 8 is disposed on an inner wall of the burette 2, two ends of the wire 8 are connected to an external power supply 9 and an ammeter 10 connected in series after penetrating out from a side wall of the beaker 3, a button 4c for controlling heating of the heating plate 5 and a button 4b for controlling conduction of the power supply 9 are further disposed on the control panel 4, the magnetic stirrer 11 is arranged at the bottom of the beaker 3, and the controller 4d of the magnetic stirrer 11 is arranged on the control panel 4.
When the titration device works, a solution to be titrated is added into the burette 2, the electromagnetic valve 6 is opened to enable the solution to be added into the beaker 3 from the burette 2 to be mixed with the solution in the beaker 3, the heating plate 5 and the magnetic stirrer 11 are simultaneously opened, the color change of the solution is monitored through the color sensor 7, and after the mixed solution reaches a set color, the electromagnetic valve 6 is controlled to be closed to stop titration; meanwhile, the lead 8 can be matched with the external power supply 9 and the ammeter 10 to realize accurate collection of the amount of the dripped solution, and the collection formula is as follows:
Iinitial=u/（RConducting wire+RTitration solution）；
ITerminate= u/（RConducting wire+R’ Titration solution）；
ΔI= ITerminate- IInitial；
Wherein R isTitration solutionFor the initial position, the volume of the titration solution corresponds to the resistance, R’ Titration solutionTitration of the volume of liquid for the end position corresponds to the resistance, RConducting wireIs a wire resistance (constant throughout); rTitration solution- R’ Titration solutionI.e. the amount of the solution dropped, in the formula IInitial、ITerminate、u、RConducting wireThe amount of the dripped solution can be calculated according to the formula.
The automatic titration apparatus provided by the present invention is described in detail above, and the principle and the embodiment of the present invention are explained in detail herein by using specific examples, which are only used to help understand the method of the present invention and the core idea thereof. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (3)
1. The utility model provides an automatic titration outfit based on photoelectric signal conduction control, a serial communication port, including setting up the buret on the support frame, the below of buret is provided with the beaker, the beaker is placed on controlling means, controlling means includes control panel and heating plate, the beaker is placed on the heating plate, the last display screen that shows titration amount and concentration that is equipped with of control panel, buret lower extreme exit is provided with the solenoid valve, be equipped with in the beaker with the color sensor that the solenoid valve electricity is connected, be equipped with the wire on the inner wall of buret, the both ends of wire are worn out the back from the beaker lateral wall and are connected on external power supply and the ampere meter of establishing ties, the last button that still is equipped with control heating plate heating and power and switches on of control panel.
2. The automatic titration device according to claim 1, wherein the burette is made of a fully insulating material.
3. The automatic titration device based on photoelectric signal transduction control according to claim 1 or 2, wherein a magnetic stirrer is provided at the bottom of the beaker, and a controller of the magnetic stirrer is provided on the control panel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110279915.0A CN112834689A (en) | 2021-03-16 | 2021-03-16 | Automatic titration device based on photoelectric signal conduction control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110279915.0A CN112834689A (en) | 2021-03-16 | 2021-03-16 | Automatic titration device based on photoelectric signal conduction control |
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| Publication Number | Publication Date |
|---|---|
| CN112834689A true CN112834689A (en) | 2021-05-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110279915.0A Pending CN112834689A (en) | 2021-03-16 | 2021-03-16 | Automatic titration device based on photoelectric signal conduction control |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114011485A (en) * | 2021-11-01 | 2022-02-08 | 海南医学院 | Auxiliary device is titrated in preventive medicine experiment |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4301413A (en) * | 1979-03-21 | 1981-11-17 | Siemens Aktiengesellschaft | Circuit arrangement for amperometric titration |
| CN1075210A (en) * | 1992-12-02 | 1993-08-11 | 黄庆文 | Measure the autotitrator of vs bulk resistor design |
| CN204556509U (en) * | 2015-02-10 | 2015-08-12 | 河南中天恒信生物化学科技有限公司 | A kind of novel titrator |
| CN105021767A (en) * | 2015-07-29 | 2015-11-04 | 江汉大学 | Automatic titrating system |
| CN214585182U (en) * | 2021-03-16 | 2021-11-02 | 扬州大学 | Automatic titration device based on photoelectric signal conduction control |
-
2021
- 2021-03-16 CN CN202110279915.0A patent/CN112834689A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4301413A (en) * | 1979-03-21 | 1981-11-17 | Siemens Aktiengesellschaft | Circuit arrangement for amperometric titration |
| CN1075210A (en) * | 1992-12-02 | 1993-08-11 | 黄庆文 | Measure the autotitrator of vs bulk resistor design |
| CN204556509U (en) * | 2015-02-10 | 2015-08-12 | 河南中天恒信生物化学科技有限公司 | A kind of novel titrator |
| CN105021767A (en) * | 2015-07-29 | 2015-11-04 | 江汉大学 | Automatic titrating system |
| CN214585182U (en) * | 2021-03-16 | 2021-11-02 | 扬州大学 | Automatic titration device based on photoelectric signal conduction control |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114011485A (en) * | 2021-11-01 | 2022-02-08 | 海南医学院 | Auxiliary device is titrated in preventive medicine experiment |
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