Full-automatic point titration detection device

Abstract

The utility model discloses a full-automatic point titration detection device and relates to the field of quantitative analysis. The device comprises a solvent bottle and a measuring cup, a sampling pipe is arranged in the solvent bottle, a sample introduction pipe is arranged in the measuring cup, a first one-way valve, a second one-way valve, a tee joint and a constant-volume titrator are arranged between the solvent bottle and the measuring cup, the first one-way valve is installed on the sampling pipe, and the second one-way valve is installed on the sample introduction pipe. The tee joint is installed between the sampling pipe and the sample injection pipe, the constant-volume titrator is installed at the bottom of the tee joint, the constant-volume titrator is the same as the tee joint, and the constant-volume titrator is used for sucking quantitative liquid in the solvent bottle and quantitatively conveying the quantitative liquid into the second one-way valve. According to the device, the dripping amount is strictly controlled through the transmitter, end point judgment is conducted through the indicator electrode and the reference electrode, judgment is not affected by personal errors, cleaning is convenient, and mounting and dismounting are rapid and easy through modular design.

Description

Technical Field

[0001] This utility model relates to the field of quantitative analysis technology, specifically to a fully automatic point titration detection device. Background Technology

[0002] In the field of chemical analysis, potentiometric titration is a classic quantitative analytical technique based on electrochemical principles. Traditionally, it is performed manually or semi-automatically: In the experiment, the operator dissolves the sample containing the analyte in a solvent and manually adds a titrant of known concentration while continuously monitoring the electrochemical system consisting of an indicator electrode and a reference electrode. The reference electrode maintains a constant potential, while the potential of the indicator electrode changes with the concentration of the analyte. When the reaction approaches the stoichiometric point, the solution potential jumps abruptly, and the operator must rely on experience to determine this abrupt change as the titration endpoint.

[0003] Existing potentiometric titration methods have revealed several problems after long-term use. These include insufficient operational flexibility, with manual or semi-automated operation leading to time-consuming and labor-intensive testing of large numbers of samples. Furthermore, titration parameters such as drip rate and endpoint determination require manual intervention, making them susceptible to human error. Additionally, there is the issue of limited functionality, supporting only a few titration modes and failing to adapt to complex sample characteristics by switching to strategies such as dynamic titration or equal-volume titration. Equipment cleaning and reagent replacement are also time-consuming and labor-intensive, impacting detection efficiency. To address these issues, this invention provides a fully automated point-position titration detection device. Utility Model Content

[0004] To address the shortcomings of existing technologies, this invention provides a fully automatic point titration detection device, which solves many problems that have emerged in the long-term use of existing potentiometric titration methods. These problems include insufficient operational flexibility, manual or semi-automatic operation leading to time and labor consumption when testing a large number of samples, the need for manual intervention in titration parameters such as dripping rate and endpoint determination, which are susceptible to human error, limited functionality supporting only a few titration modes and the inability to switch to strategies such as dynamic titration and equal volume titration according to complex sample characteristics, and time and labor consumption in equipment cleaning and reagent replacement, which affects detection efficiency.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a fully automatic point titration detection device, comprising a solvent bottle and a measuring cup. A sampling tube is installed inside the solvent bottle, and an injection tube is installed inside the measuring cup. A first one-way valve, a second one-way valve, a three-way valve, and a volumetric titrator are installed between the solvent bottle and the measuring cup. The first one-way valve is installed on the sampling tube, the second one-way valve is installed on the injection tube, the three-way valve is installed between the sampling tube and the injection tube, and the volumetric titrator is installed at the bottom of the three-way valve. The volumetric titrator is identical to the three-way valve and is used to draw in a quantitative amount of liquid from the solvent bottle and quantitatively deliver it into the second one-way valve.

[0006] Preferably, an actuator is also provided between the solvent bottle and the measuring cup. The actuator is the same as that of the volumetric titrator, and the actuator rod is used to drive the volumetric titrator to draw or output liquid.

[0007] Preferably, the solvent bottle contains a titrant, the measuring cup contains a sample, and a portion of the titrant is dripped into the measuring cup to become a sample for testing.

[0008] Preferably, a stirrer is placed at the bottom of the measuring cup, and a stirring bar is installed at the top of the stirrer. The stirring bar is used to stir the sample inside the measuring cup.

[0009] Preferably, a motor bracket is provided next to the measuring cup, the motor bracket is installed at one end of the stirrer, and an indicator electrode and a reference electrode are installed on the motor bracket. The indicator electrode and the reference electrode are used to accurately determine the titration endpoint.

[0010] Preferably, a transmitter and a printer are also provided next to the measuring cup. The motor lines of the indicating electrode and the reference electrode are both connected to the transmitter. The control line of the actuator is connected to the transmitter. The printer is also connected to the transmitter. The printer is used to print the report results immediately after titration is completed.

[0011] This utility model discloses a fully automatic point titration detection device, which has the following advantages: The fully automatic point titration detection device strictly controls the titration volume through a transmitter and determines the endpoint through an indicating electrode and a reference electrode, so that the determination is not affected by human error. It is easy to clean, and the modular design makes installation and disassembly quick and simple. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of the overall design of this utility model.

[0014] In the diagram: 1. Titrant; 2. Solvent bottle; 3. Sampling tube; 4. First check valve; 5. Three-way valve; 6. Volumetric titrator; 7. Actuator; 8. Second check valve; 9. Injection tube; 10. Indicating electrode; 11. Reference electrode; 12. Measuring cup; 13. Sample; 14. Stirrer; 15. Stirrer; 16. Motor bracket; 17. Transmitter; 18. Printer. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments of this utility model are described clearly and completely. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0016] This application provides a fully automated point titration detection device, which solves many problems that have emerged in the long-term use of existing potentiometric titration methods. These problems include insufficient operational flexibility, manual or semi-automated operation leading to time and labor consumption when testing a large number of samples, the need for manual intervention in titration parameters such as dripping rate and endpoint determination, which are easily affected by human error, limited functionality, support for only a few titration modes, inability to switch to strategies such as dynamic titration and equal volume titration according to complex sample characteristics, and time and labor consumption in equipment cleaning and reagent replacement, which affects detection efficiency.

[0017] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0018] This utility model discloses a fully automatic point titration detection device.

[0019] Example 1

[0020] According to the appendix Figure 1As shown, the device includes a solvent bottle 2 and a measuring cup 12. A sampling tube 3 is installed inside the solvent bottle 2, and an injection tube 9 is installed inside the measuring cup 12. A first one-way valve 4, a second one-way valve 8, a three-way valve 5, and a volumetric titrator 6 are installed between the solvent bottle 2 and the measuring cup 12. The first one-way valve 4 is installed on the sampling tube 3, the second one-way valve 8 is installed on the injection tube 9, the three-way valve 5 is installed between the sampling tube 3 and the injection tube 9, and the volumetric titrator 6 is installed at the bottom of the three-way valve 5. The volumetric titrator 6 is connected to the three-way valve... Similar to 5, the volumetric titrator 6 is used to draw a quantitative amount of liquid from the solvent bottle 2 and quantitatively deliver it into the second one-way valve 8. An actuator 7 is also provided between the solvent bottle 2 and the measuring cup 12. The actuator 7 is the same as the volumetric titrator 6. The actuator rod of the actuator 7 is used to drive the volumetric titrator 6 to draw or output liquid. The solvent bottle 2 contains titrant 1, and the measuring cup 12 contains sample 13. A portion of the titrant 1 is dripped into the measuring cup 12 to become sample 13 and is received for testing.

[0021] A stirrer 15 is placed at the bottom of the measuring cup 12, and a stir bar 14 is installed at the top of the stirrer 15. The stir bar 14 is used to stir the sample 13 in the measuring cup 12. A motor bracket 16 is set next to the measuring cup 12. The motor bracket 16 is installed at one end of the stirrer 15. An indicator electrode 10 and a reference electrode 11 are installed on the motor bracket 16. The indicator electrode 10 and the reference electrode 11 are used to accurately determine the titration endpoint.

[0022] A transmitter 17 and a printer 18 are also provided next to the measuring cup 12. The motor wires of the indicating electrode 10 and the reference electrode 11 are connected to the transmitter 17. The control wire of the actuator 7 is connected to the transmitter 17. The printer 18 is also connected to the transmitter 17. The printer 18 is used to print the report results immediately after the titration is completed.

[0023] Example 2, according to Appendix Figure 1 As shown, the overall process is as follows:

[0024] 1. Ensure the pipes are properly connected;

[0025] 2. Pour an appropriate amount of titrant 1 into reagent bottle 2, and adjust the sampling tube 3 so that it is inserted into the solution;

[0026] 3. Pipeline cleaning:

[0027] Insert the injection tube 9 into the waste liquid cup, set the number of cleaning times and the volume (ml) for each cleaning in the transmitter 17 (generally no more than 10ml), and click the cleaning function key on the transmitter 17 to perform flow path cleaning.

[0028] Liquid extraction: The actuator rod of actuator 7 moves downward, causing the plunger of the volumetric titrator 6 to move downward. The first one-way valve 4 opens, and the second one-way valve 8 closes, drawing the titrant 1 into the volumetric titrator 6.

[0029] Discharge: The actuator rod of actuator 7 moves upward, causing the pull rod of the volumetric titrator 6 to move upward, opening the second one-way valve 8 and discharging the titrant 1 into the waste bottle.

[0030] The cleaning process is complete after repeating the set number of times set by actuator 7.

[0031] 4. Measurement:

[0032] Set the relevant parameters required for measurement in the transmitter 17, pour a certain volume of the sample 13 to be measured into the measuring cup 12, adjust the indicating electrode 10 and the reference electrode 11 to immerse them in the sample 13, adjust the injection tube 9 to 1 cm above the liquid surface of the sample 13, and click the measurement function key of the transmitter 17 to perform the measurement.

[0033] Stir sample 13 to create a small vortex on the upper surface of sample 13;

[0034] Liquid extraction: The actuator rod of actuator 7 moves downward, causing the plunger of the volumetric titrator 6 to move downward. The first one-way valve 4 opens, and the second one-way valve 8 closes, drawing the titrant 1 into the volumetric titrator 6.

[0035] Drainage: The actuator rod of actuator 7 moves slowly upward, causing the pull rod of the volumetric titrator 6 to move slowly upward. The second one-way valve 8 slowly titrates the titrant 1 into the sample 13. The transmitter 17 collects the voltage signals of the indicator electrode 10 and the reference electrode 11. Changes in the concentration of the analyte in the solution will cause changes in the potential of the indicator electrode. The sudden change in the potential of the indicator electrode indicates the end of the titration. The transmitter 17 calculates the value of the sample 13 according to the set parameters and prints it out through the printer 18. The measurement is completed.

[0036] 5. Post-measurement maintenance:

[0037] If no further measurements are required, proceed with the following steps:

[0038] Cleaning: Replace titrant 1 with cleaning solution and repeat step 3;

[0039] Emptying: Place titrant 1 into the air and repeat step 3 to empty the liquid in the tube.

[0040] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A fully automatic point titration detection device, comprising a solvent bottle (2) and a measuring cup (12), characterized in that, A sampling tube (3) is provided inside the solvent bottle (2), and an injection tube (9) is provided inside the measuring cup (12). A connection is provided between the solvent bottle (2) and the measuring cup (12). The first check valve (4) is installed on the sampling tube (3); The second check valve (8) is installed on the injection tube (9); A tee (5) is installed between the sampling tube (3) and the injection tube (9); Volumetric titrator (6) is installed at the bottom of the tee (5). The volumetric titrator (6) is the same as the tee (5). The volumetric titrator (6) is used to draw a quantitative amount of liquid from the solvent bottle (2) and quantitatively deliver it into the second one-way valve (8).

2. The fully automatic point titration detection device according to claim 1, characterized in that: An actuator (7) is also provided between the solvent bottle (2) and the measuring cup (12). The actuator (7) is the same as the volumetric titrator (6). The actuator rod of the actuator (7) is used to drive the volumetric titrator (6) to draw or output liquid.

3. The fully automatic point titration detection device according to claim 1, characterized in that: The solvent bottle (2) contains titrant (1), and the measuring cup (12) contains sample (13). A portion of the titrant (1) is dripped into the measuring cup (12) to become sample (13) and is then tested.

4. The fully automatic point titration detection device according to claim 3, characterized in that: A stirrer (15) is placed at the bottom of the measuring cup (12), and a stir bar (14) is installed at the top of the stirrer (15). The stir bar (14) is used to stir the sample (13) inside the measuring cup (12).

5. The fully automatic point titration detection device according to claim 2, characterized in that: A motor bracket (16) is provided next to the measuring cup (12). The motor bracket (16) is installed at one end of the stirrer (15). An indicator electrode (10) and a reference electrode (11) are installed on the motor bracket (16). The indicator electrode (10) and the reference electrode (11) are used to accurately determine the titration endpoint.

6. The fully automatic point titration detection device according to claim 5, characterized in that: The measuring cup (12) is also provided with the following on one side: The motor lines of the indicator electrode (10) and the reference electrode (11) are connected to the transmitter (17), and the control line of the actuator (7) is connected to the transmitter (17). A printer (18), which is also connected to the transmitter (17), is used to print a report of the titration results immediately after titration is completed.

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