CN112557581A - Accurate quick titration outfit - Google Patents
Accurate quick titration outfit Download PDFInfo
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- CN112557581A CN112557581A CN202011457790.8A CN202011457790A CN112557581A CN 112557581 A CN112557581 A CN 112557581A CN 202011457790 A CN202011457790 A CN 202011457790A CN 112557581 A CN112557581 A CN 112557581A
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- 238000004448 titration Methods 0.000 title claims abstract description 132
- 239000007788 liquid Substances 0.000 claims abstract description 128
- 238000006243 chemical reaction Methods 0.000 claims abstract description 12
- 238000004891 communication Methods 0.000 claims abstract description 9
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims description 4
- 235000017491 Bambusa tulda Nutrition 0.000 claims description 4
- 241001330002 Bambuseae Species 0.000 claims description 4
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 4
- 239000011425 bamboo Substances 0.000 claims description 4
- 238000012545 processing Methods 0.000 claims description 4
- 239000000741 silica gel Substances 0.000 claims description 4
- 229910002027 silica gel Inorganic materials 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 3
- 238000005070 sampling Methods 0.000 abstract description 8
- 238000002474 experimental method Methods 0.000 abstract description 5
- 238000003756 stirring Methods 0.000 abstract description 2
- 239000000243 solution Substances 0.000 description 10
- 238000000034 method Methods 0.000 description 5
- 238000003918 potentiometric titration Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 150000002500 ions Chemical class 0.000 description 3
- 239000012086 standard solution Substances 0.000 description 3
- 239000012535 impurity Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 102220098272 rs878853037 Human genes 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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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
- G01N31/162—Determining the equivalent point by means of a discontinuity
- G01N31/164—Determining the equivalent point by means of a discontinuity by electrical or electrochemical means
-
- 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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- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Biochemistry (AREA)
- Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Molecular Biology (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
Abstract
The invention discloses a precise and rapid titration device, a reference electrode and an indicating electrode are arranged in a titration chamber, the reference electrode and the indicating electrode are in signal communication with a signal collector, a stirring device is arranged below a reaction container, the titration device comprises a standard liquid titration device and a to-be-measured liquid titration device, the standard liquid titration device and the to-be-measured liquid titration device respectively comprise a driver, a driving screw rod, a guide component, a driving piece and an injector from top to bottom in sequence, the driver is arranged on a fixed frame, the power output end of the driver is connected with the upper end of the driving screw rod, the lower end of the driving screw rod is in threaded connection with the driving piece, the driving piece moves up and down along with the rotation of the driving screw, the driving part corresponding to the guide part is provided with a guide hole, the guide part is limited in the guide hole in an XY plane, and the lower part of the driving part is connected with a piston handle of the injector. The invention does not need frequent sampling, avoids sampling errors, improves the titration accuracy and improves the titration experiment efficiency.
Description
Technical Field
The invention relates to the technical field of potentiometric titration technology and devices, in particular to a precise and rapid titration device.
Background
At present, titration is mainly carried out in a mode of combining a test tube with a dropper, but the problem that a glass instrument is broken easily occurs in the operation process, the sampling of the liquid to be tested and the standard liquid is carried out in a manual operation mode, the sampling is frequent and tedious, certain operation errors exist, the titration result is inaccurate, and the titration efficiency is low. This design has designed an accurate quick titration outfit based on the potentiometric titration principle, and it can effectively solve among the prior art big, the inefficiency problem of titration error.
Disclosure of Invention
To above-mentioned problem, developed a series of titration experiments to same standard solution, need not frequent sample, avoided sampling error, improved the accurate quick titration device who titrates the efficiency of experiment.
In order to solve the technical problems, the invention provides an accurate and rapid titration device, which comprises a reaction container, wherein a titration cavity is arranged in the reaction container, a reference electrode and an indicating electrode are arranged in the titration cavity, the reference electrode and the indicating electrode are in signal communication with a signal collector, a stirring device is arranged below the reaction container, a titration device is arranged above the titration cavity and comprises a standard liquid titration device and a to-be-measured liquid titration device, the standard liquid titration device and the to-be-measured liquid titration device respectively comprise a driver, a driving screw rod, a guide component, a driving piece and an injector from top to bottom in sequence, the driver is arranged on a fixed frame, the power output end of the driver is connected with the upper end of the driving screw rod, the lower end of the driving screw rod is in threaded connection with the driving piece, the driving piece moves up and down along with the rotation of the driving screw rod, the driving part corresponding to the guide part is provided with a guide hole, the guide part is limited in the guide hole in an XY plane, and the lower part of the driving part is connected with a piston handle of the injector.
Preferably, the guide member is two or more guide rods circumferentially arranged around the drive screw, and the lower ends of the guide rods are inserted into the guide holes.
Preferably, the syringe includes empty section of thick bamboo, sets up piston and piston handle in the empty section of thick bamboo, empty bobbin base portion set up with titrate the mouth of titrating of chamber intercommunication, still includes accurate titration mouth, accurate titration mouth including cup joint portion and titration portion, cup joint portion cup joint with titrate mouthful on, titration portion is inverted triangle taper type, the vertex of a cone sets up titrates the through-hole, titration portion is rubber or silica gel material.
Preferably, the device for titrating the liquid to be measured comprises a liquid storage tank for the liquid to be measured, wherein a liquid inlet hole is formed in the lower part of an empty cylinder of a syringe of the device for titrating the liquid to be measured and is positioned below a piston of the syringe, a liquid outlet hole is formed in the lower part of the liquid storage tank for the liquid to be measured, and the liquid outlet hole is communicated with the liquid inlet hole through a liquid inlet pipe.
Preferably, a one-way valve which can only enable the liquid to be detected to flow from the liquid storage tank to the empty cylinder of the injector in one way is arranged in the liquid inlet pipe.
Preferably, the lower part of the liquid storage tank to be detected is provided with a filter layer, and the filter layer is in a funnel shape.
Preferably, the driver is respectively connected with the liquid controller to be tested and the standard liquid controller, and the signal output port of the signal collector is in communication connection with the signal access port of the liquid controller to be tested or the signal access port of the standard liquid controller.
Preferably, the liquid controller to be measured and the standard liquid controller respectively comprise a signal acquisition unit, a display unit, a central processing unit, a control unit and a communication unit.
Preferably, the signal collector is an STM32 single chip microcomputer.
Compared with the prior art, the invention has the beneficial effects that:
1. by adopting the potentiometric titration method, the device can meet the requirement that the device is not suitable for the titration of the indicator solution, such as the titration of colored and turbid solutions, and the adaptability of the device to different solutions is effectively improved. Meanwhile, whether the titration end point is reached can be judged more visually, so that the device is convenient and quick to operate.
2. Adopt respectively waiting to detect liquid titration outfit and standard liquid titration outfit and realize double-barrelled sample, double-barrelled titration, in the series experiment of fixedly using a standard liquid to titrate or a fixed waiting to detect liquid to titrate, can once only get enough stationary liquid, reduce sample operating frequency and sampling error, ensure the accuracy of titration data, simplify the step, improve and titrate experimental efficiency.
3. Through reasonable structural design, the spiral torque is converted into a longitudinal propulsion distance, the propulsion control distance is lengthened, the propulsion amount of the titration liquid is controlled more accurately, and titration is more accurate.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive labor.
FIG. 1 is a schematic structural diagram of a precise and rapid titration apparatus according to the present invention;
wherein, 1-a reaction container, 2-a titration cavity, 3-a reference electrode, 4-an indicator electrode, 5-a signal collector, 6-a magnetic stirrer, 7-a titration device, 7 a-a standard liquid titration device, 7 b-a to-be-measured liquid titration device, 71-a driver, 72-a driving screw, 73-a guide component, 74-a driving component, 75-an injector, 751-a piston handle, 752-a hollow cylinder, 753-a piston, 754-a titration opening, 755-an accurate titration nozzle, 7551-a sleeve joint part, 7552-a titration part, 756-a liquid inlet hole, 76-a guide hole, 8-a to-be-measured liquid storage tank, 81-a liquid outlet hole, 82-a liquid inlet pipe, 83-a one-way valve, 84-a filter layer and 9 a-a standard liquid controller, 9 b-liquid controller to be measured, 10-fixing frame.
Detailed Description
The following description of the embodiments of the present invention will be made with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
As shown in fig. 1, an accurate rapid titration apparatus includes a reaction vessel 1, a titration chamber 2 is provided in the reaction vessel 1, a reference electrode 3 and an indicator electrode 4 are provided in the titration chamber 2, the reference electrode 3 and the indicator electrode 4 are in signal communication with a signal collector 5, a magnetic stirrer 6 is provided below the reaction vessel, such as a D30A magnetic stirrer, a titration apparatus 7 is provided above the titration chamber 2, the titration apparatus 7 includes a standard titration apparatus 7a and a to-be-measured titration apparatus 7b, the standard titration apparatus 7a and the to-be-measured titration apparatus 7b respectively include a driver 71, a driving screw 72, a guide member 73, a driving member 74 and an injector 75 from top to bottom, wherein the driver 71 may be a driving motor. The injector is characterized by further comprising a fixed frame 10, a driver 71 is installed on the fixed frame 10, the power output end of the driver 71 is connected with the upper end of a driving screw 72, the lower end of the driving screw 72 is in threaded connection with a driving piece 74, the driving piece 74 moves up and down along with the rotation of the driving screw 72, at least one guide component 73 arranged in the vertical direction is fixedly arranged on the fixed frame 10, a guide hole 76 is formed in the driving piece 74 corresponding to the position of the guide component 73, the guide component 73 is limited in the guide hole 76 in the XY plane, and the lower portion of the driving piece 74 is connected with a piston.
In the embodiment, the potentiometric titration method is adopted, so that the device can meet the condition that the device is not suitable for the titration of the indicator solution, such as the titration of colored and turbid solutions, and the adaptability of the device to different solutions is effectively improved. Meanwhile, whether the titration end point is reached can be judged more visually, so that the device is convenient and quick to operate. Adopt respectively waiting to detect liquid titration outfit 7b and standard solution titration outfit 7a and realize two-barrelled sample, two-barrelled titration, in the series experiment of fixed use a standard solution titration or fixed waiting to detect the liquid titration, can once only get enough stationary liquid, reduce sample operating frequency and sampling error, ensure to titrate the accuracy of data, simplify the step, improve and titrate experimental efficiency. Through reasonable structural design, the spiral torque is converted into a longitudinal propulsion distance, the propulsion control distance is lengthened, the propulsion amount of titration liquid is controlled more accurately, and titration is more accurate
Preferably, the guide member 73 is two or more guide rods circumferentially arranged around the drive screw 72, and the lower ends of the guide rods are inserted into the guide holes 76.
In other embodiments, the syringe 75 includes an empty cylinder 752, a piston 753 and a piston handle 751 are disposed in the empty cylinder 752, a titration opening 754 communicated with the titration cavity 2 is disposed at the bottom of the empty cylinder 752, the syringe further includes a precise titration nozzle 755, the precise titration nozzle 755 includes a sleeve portion 7551 and a titration portion 7552, the sleeve portion 7551 is sleeved on the titration opening 754, the titration portion 7552 is in an inverted triangular cone shape, a titration through hole is disposed at the top of the cone, and the titration portion 7552 is made of rubber or silica gel.
In the embodiment, when the titration is performed in the early stage or in the rough titration, the titration can be directly performed through the self-contained titration port 754, which is convenient and quick; the accurate titration mouth 755 can be installed additional at later stage titration or accurate drip timing, and the titration amount of more meticulous control titration liquid, more accurate finding titration terminal point. The sleeving part 7551 is sleeved on the titration opening 754, so that the installation and the disassembly are more flexible and convenient; titration portion 7552 is the type of inverted triangle awl, and the vertex of a cone sets up titrates the through-hole, and titration portion 7552 is rubber or silica gel material, and no air gets into when guaranteeing the titration state, reduces and titrates the interference of bubble to the measurement volume, makes to titrate the measurement more accurate.
In other embodiments, the liquid titration apparatus 7b further comprises a liquid storage tank 8 for the liquid to be tested 8, wherein a liquid outlet 81 is disposed at the lower part of the liquid storage tank 8, and the liquid outlet 81 is communicated with the liquid inlet 756 through a liquid inlet pipe 82. By arranging the liquid storage tank 8 for the liquid to be detected, external liquid adding is realized, on one hand, the liquid to be detected can be pretreated, on the other hand, the liquid adding is convenient, and the piston handle 751 and the piston 752 of the injector 75 do not need to be taken out during the liquid adding; moreover, the external liquid adding device can visually observe and control the liquid adding amount, and is convenient for liquid adding for a small amount of times. The liquid inlet pipe 82 is provided with a one-way valve 83 which can only make the liquid to be detected flow from the liquid storage tank 8 to the empty cylinder 752 of the syringe 75 in one way, so that the liquid to be detected can smoothly enter the empty cylinder 752 on one hand, and on the other hand, the liquid to be detected is prevented from flowing back to the liquid storage tank 8 when entering the titration chamber 2 under the action of the syringe 75. The filtering layer 84 is arranged at the lower part of the liquid storage tank 8 to be tested, so that the influence of impurity particles entering the titration chamber 2 on the titration result is effectively avoided, and the use is convenient; the filter layer 84 is funnel shaped to increase the filter area.
In other embodiments, the drivers 71 are respectively connected to the controller 9b for liquid to be measured and the controller 9a for standard liquid, the signal collector 5 is an STM32 single chip microcomputer, and the signal output port of the signal collector 5 is in communication connection with the signal access port of the controller 9b for liquid to be measured or the signal access port of the controller 9a for standard liquid. The liquid controller to be measured 9b and the standard liquid controller 9a each include a signal acquisition unit, a display unit, a central processing unit, a control unit, and a communication unit (not shown in the figure). According to the embodiment, the method can realize the double titration mode of titrating the liquid to be measured by fixing the volume of the standard liquid or fixing the volume of the liquid to be measured, calculating the components and the content of the liquid to be measured according to the titration volume of the measured standard liquid, transmitting the signal of the titration end point to the controller 9b of the liquid to be measured or the controller 9a of the standard liquid by connecting the acquisition signal of the signal acquisition unit 5 into the signal line interface of the controller 9b of the liquid to be measured or the controller 9a of the standard liquid, controlling the corresponding driver 71 to stop driving the driving screw 72 by the control unit, converting the driving information of the driver 71 by the signal acquisition unit through the central processing unit to calculate the corresponding titration volume, calculating the content of the related ions in the liquid to be measured, and displaying.
As shown in fig. 1, in the operation of this embodiment, the liquid to be measured is poured into the liquid storage tank 8, and is filtered by the filter layer 84 to enter the empty cylinder through the liquid inlet pipe 72 and the one-way valve 73, after the liquid to be measured enters the empty cylinder 752, the controller 71 of the titration device 7b of the liquid to be measured is adjusted according to the amount of the liquid to be measured, so as to control the amount of work of moving down the corresponding piston 753, thereby realizing the quantitative sampling of the liquid to be measured, and facilitating the calculation of the ion content thereof. The method comprises the steps that a liquid to be detected quantitatively enters a titration cavity 2 under the action of a titration device 7b of the liquid to be detected, a standard liquid enters the titration cavity 2 under the action of a titration device 7a of the standard liquid, meanwhile, the solution in the titration cavity 2 is mixed under the action of a magnetic stirrer 6, when the standard liquid and the liquid to be detected react to a titration end point, a reference electrode 3 and an indicating electrode 4 generate electromotive force changes, a signal collector 5 collects changed electric signals and conveys the changed electric signals to a controller 71 of the titration device 7a of the standard liquid, then the controller 71 enables a corresponding injector 75 to brake, the downward movement workload of the injector is displayed on a display screen, the volume of the standard liquid required by the titration reaction of the liquid to be detected can be obtained quantitatively, and the content of related ions in the liquid to be detected can be calculated. The arrangement of the filter layer 84 can effectively prevent impurity particles in the liquid to be measured from entering the titration chamber 2 to affect the titration accuracy.
It should be noted that the above-mentioned embodiments are only for the understanding of the present invention, but not for the limitation of the present invention, and those skilled in the art can make various changes, modifications, substitutions, integrations and variations without departing from the spirit and scope of the present invention, so that all the equivalent technical solutions should also fall within the scope of the present invention, and should be defined by the claims.
Claims (9)
1. The utility model provides an accurate quick titration outfit, includes reaction vessel, for titrating the chamber in the reaction vessel, set up reference electrode and indicating electrode in titrating the intracavity, reference electrode with indicating electrode signal intercommunication signal collector, the reaction vessel below sets up agitating unit, it sets up titration outfit, its characterized in that to titrate the chamber top: the titration apparatus comprises a standard liquid titration apparatus and a to-be-measured liquid titration apparatus, the standard liquid titration apparatus and the to-be-measured liquid titration apparatus sequentially comprise a driver, a driving screw rod, a guide component, a driving piece and an injector from top to bottom respectively, the driver is installed on the fixing frame, the power output end of the driver is connected with the upper end of the driving screw rod, the lower end of the driving screw rod is in threaded connection with the driving piece, the driving piece moves up and down along with the rotation of the driving screw rod, at least one guide component arranged in the vertical direction is fixedly arranged on the fixing frame and corresponds to the position of the guide component, a guide hole is formed in the driving piece, the guide component is limited in the guide hole in an XY plane, and the lower part of the driving piece is connected with a piston.
2. The accurate rapid titration device according to claim 1, wherein: the guide part is two or more guide rods arranged around the circumference of the drive screw, and the lower ends of the guide rods are inserted into the guide holes.
3. The accurate rapid titration device according to claim 1, wherein: the syringe includes empty section of thick bamboo, set up piston and piston handle in the empty section of thick bamboo, empty bobbin base portion set up with titrate the mouth of titrating of chamber intercommunication, still include accurate titration mouth, accurate titration mouth is including cup jointing portion and titration portion, cup jointing portion cup joint with titrate on the mouth, titration portion is inverted triangle taper type, and the vertex of a cone sets up titrates the through-hole, titration portion is rubber or silica gel material.
4. The accurate rapid titration device according to claim 1, wherein: the device comprises a to-be-detected liquid storage tank, wherein a liquid outlet hole is formed in the lower portion of an empty cylinder of a syringe of the to-be-detected liquid titration device and is positioned below a piston of the syringe, and the liquid outlet hole is communicated with the liquid inlet hole through a liquid inlet pipe.
5. The accurate rapid titration device according to claim 4, wherein: and a one-way valve which can only enable the liquid to be detected to flow from the liquid storage tank to be detected to the empty cylinder of the syringe in one way is arranged in the liquid inlet pipe.
6. The accurate rapid titration device according to claim 4, wherein: and a filter layer is arranged at the lower part of the liquid storage tank to be detected, and the filter layer is in a funnel shape.
7. The accurate rapid titration device according to claim 1, wherein: the drivers are respectively connected with the liquid controller to be tested and the standard liquid controller, and the signal output port of the signal collector is in communication connection with the signal access port of the liquid controller to be tested or the signal access port of the standard liquid controller.
8. The accurate rapid titration device according to claim 7, wherein: the liquid controller to be measured and the standard liquid controller respectively comprise a signal acquisition unit, a display unit, a central processing unit, a control unit and a communication unit.
9. The accurate rapid titration device according to claim 1, wherein: the signal collector is an STM32 single chip microcomputer.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011457790.8A CN112557581A (en) | 2020-12-11 | 2020-12-11 | Accurate quick titration outfit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011457790.8A CN112557581A (en) | 2020-12-11 | 2020-12-11 | Accurate quick titration outfit |
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| CN112557581A true CN112557581A (en) | 2021-03-26 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113680129A (en) * | 2021-08-10 | 2021-11-23 | 安徽农业大学 | Extracting solution purification method based on pesticide residue detection in tea and needle type filter |
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2020
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113680129A (en) * | 2021-08-10 | 2021-11-23 | 安徽农业大学 | Extracting solution purification method based on pesticide residue detection in tea and needle type filter |
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