Titration device

Abstract

The titration device comprises a first storage rack, a liquid adding assembly, a visual probe and a mechanical arm assembly, the first storage rack is provided with a first containing cavity, the first containing cavity is provided with a window and a first opening, the liquid adding assembly comprises a liquid adding pump and a first liquid adding arm, and the first liquid adding arm comprises a first part and a second part; the first part is arranged beside the first storage rack relative to the window, the second part is convexly arranged on the first part relative to the top side of the first storage rack, the liquid adding pump is communicated with the second part, and the visual probe is arranged on the first part and is used for detecting the color change in the titration container exposed in the window so as to judge the titration end point; the mechanical arm assembly is used for transferring the titration container from the first opening into the first accommodating cavity before titration, and the mechanical arm assembly is also used for moving the titration container out of the first accommodating cavity from the first opening after titration. The titration device provided by the utility model is beneficial to improving the titration operation safety, reducing the operation intensity and reducing the operation error.

Description

Technical Field

[0001] This utility model relates to the technical field of liquid titration, and specifically to a titration device. Background Technology

[0002] Because potassium permanganate index titration requires the use of corrosive solutions such as sulfuric acid and sodium hydroxide, manual titration poses safety hazards and is subject to human error. Utility Model Content

[0003] In order to overcome the shortcomings of the prior art, the purpose of this utility model is to provide a titration device that is conducive to improving the safety of titration operation, reducing the intensity of operation and reducing operation error.

[0004] To solve the above problems, the technical solution adopted by this utility model is as follows:

[0005] A titration apparatus, comprising:

[0006] The first shelf has a first receiving cavity for accommodating a titration container, the first receiving cavity having a window extending through the side end of the first shelf and a first opening extending through the top end of the first shelf;

[0007] A liquid dispensing assembly, comprising a liquid dispensing pump and a first liquid dispensing arm, the first liquid dispensing arm comprising a first part and a second part, the first part being positioned beside the first shelf relative to the opening, the second part being protruding from the first part relative to the top side of the first shelf, the liquid dispensing pump being connected to the second part for pumping titration reagent to the titration container of the first shelf;

[0008] A vision probe, mounted on the first part, is used to detect color changes within the titration container exposed to the window to determine the titration endpoint; and

[0009] A robotic arm assembly is used to transfer the titration container from the first opening into the first receiving cavity before titration, and the robotic arm assembly is also used to remove the titration container from the first opening into the first receiving cavity after titration.

[0010] In some possible implementations, the first accommodating cavity has a plurality of first openings arranged along a first direction, the number of liquid dispensing pumps is at least two, and the liquid dispensing assembly further includes:

[0011] The second dispensing arm is located on the top side of the first shelf. The first dispensing arm and the second dispensing arm are connected to different dispensing pumps to deliver different titration reagents to the titration container.

[0012] A first guide rail slide module is connected to the first part, and the first guide rail slide module is used to drive the first liquid dispensing arm to reciprocate along the first direction; and

[0013] A drive unit is located on the side of the first shelf opposite to the window, and the drive unit is used to drive the second liquid filling arm to rotate parallel to the first direction.

[0014] In some possible implementations, the vision probe is also used to record video.

[0015] In some possible implementations, it also includes:

[0016] A second shelf, positioned beside the first shelf away from the liquid dispensing assembly, includes a housing and a partition. The housing closes to form a second receiving cavity, which has a second opening extending through the top of the housing. The partition is horizontally positioned within the second receiving cavity to separate a first cavity area from a second cavity area. The first cavity area is positioned near the second opening for holding the titration container.

[0017] A first heating element is provided at least in the second cavity area. The first heating element is used to heat and digest the water sample in the titration container before titration. The robotic arm assembly is also used to transfer the heated and digested titration container from the second shelf to the first receiving cavity.

[0018] In some possible implementations, it also includes:

[0019] A temperature probe is mounted on the housing and located within the second cavity area.

[0020] In some possible implementations, it also includes:

[0021] The second heating element is disposed within the first accommodating cavity.

[0022] In some possible implementations, the robotic arm assembly includes:

[0023] The second guide rail slide module is located on the top side of the first shelf;

[0024] The third guide rail slide module is provided protruding from the side end of the second guide rail slide module. The second guide rail slide module is used to drive the third guide rail slide module to reciprocate along the first direction.

[0025] The fourth guide rail slide module protrudes from the bottom end of the third guide rail slide module, and the third guide rail slide module is used to drive the fourth guide rail slide module to reciprocate along the second direction; and

[0026] An electric gripper is connected to the fourth guide rail slide module. The fourth guide rail slide module is used to drive the electric gripper to reciprocate along a third direction. The first direction, the second direction, and the third direction are arranged perpendicular to each other.

[0027] In some possible implementations, the number of the second openings is at least nine, and the at least nine second openings are arranged in a square.

[0028] In some possible implementations, it also includes:

[0029] The container shell has a third accommodating cavity and a mounting groove. The third accommodating cavity has a third opening and a fourth opening. The liquid filling assembly is disposed in the third accommodating cavity. The second part and the second liquid filling arm both extend out of the third opening. The fourth opening communicates with the mounting groove and is disposed opposite to the window. The first shelf and the second shelf are connected and both are disposed in the mounting groove.

[0030] In some possible implementations, the container shell further comprises:

[0031] A storage slot is provided on the side of the mounting slot adjacent to the third opening. The storage slot has a fifth opening, which is disposed away from the third receiving cavity. The fifth opening is used to transfer the sample holder into and out of the storage slot.

[0032] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0033] In this application, a robotic arm assembly is used to transfer the titration container for sample delivery, reducing manual operation. This not only reduces the labor intensity of operators but also reduces the risk of burns for samples requiring heat treatment. Furthermore, the titration apparatus, equipped with a dispensing pump, delivers the titration reagent, preventing operators from coming into contact with corrosive reagents and thus improving titration safety. Additionally, the use of a visual probe to determine the titration endpoint avoids errors caused by human judgment, thereby reducing operational errors. Therefore, the titration apparatus of this application improves titration operation safety, reduces operational intensity, and minimizes operational errors.

[0034] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0035] Figure 1 A diagram showing the usage state of a titration apparatus provided in an embodiment of this application;

[0036] Figure 2 for Figure 1 A schematic diagram of the titration apparatus with a portion of the structure removed;

[0037] Figure 3 for Figure 1 The diagram shows the structure of the titration apparatus with the dust cover and part of the container removed.

[0038] Figure 4 This is a structural schematic diagram of part of the liquid filling assembly, the first shelf, and the second shelf;

[0039] Figure 5 This is a schematic diagram showing the installation of part of the second shelf with the first heating element and temperature probe.

[0040] Explanation of icon numbers:

[0041] 10 – First shelf; 101 – First receiving cavity; 1011 – Window; 1012 – First opening; 20 – Liquid filling assembly; 21 – Liquid filling pump; 22 – First liquid filling arm; 221 – First part; 222 – Second part; 23 – Second liquid filling arm; 24 – First guide rail slide module; 25 – Drive component; 30 – Vision probe; 40 – Robotic arm assembly; 41 – Second guide rail slide module; 42 – Third guide rail slide module; 43 – Fourth guide rail slide module; 44 – Electric gripper; 50 – Second shelf; 51 – Outer shell; 52 – Spacer; 501 – Second accommodating cavity; 5011 – First cavity area; 5012 – Second cavity area; 5013 – Second opening; 60 – First heating element; 70 – Temperature probe; 80 – Container shell; 81 – Mounting bracket; 8011 – Third opening; 8012 – Fourth opening; 802 – Mounting slot; 803 – Storage slot; 8031 ​​– Fifth opening; 90 – Dust cover; X – First direction; Y – Second direction; Z – Third direction. Detailed Implementation

[0042] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0043] The terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. It should be noted that when an element is referred to as "fixed to" another element, it may be directly on the other element or there may be an intervening element. When an element is referred to as "connected to" another element, it may be directly connected to the other element or there may be an intervening element. When an element is referred to as "disposed on" another element, it may be disposed on the other element or there may be an intervening element.

[0044] Reference Figures 1 to 4One embodiment of this application provides a titration apparatus, which includes a first shelf 10, a liquid addition assembly 20, a vision probe 30, and a robotic arm assembly 40. The first shelf 10 has a first receiving cavity 101 for accommodating a titration container 100. The first receiving cavity 101 has a window 1011 penetrating through the side end of the first shelf 10 and a first opening 1012 penetrating through the top end of the first shelf 10. For example, the titration container 100 can be a transparent test tube, and the titration container 100 can enter and exit the first receiving cavity 101 through the first opening 1012. The liquid dispensing assembly 20 includes a liquid dispensing pump 21 and a first liquid dispensing arm 22. The first liquid dispensing arm 22 includes a first part 221 and a second part 222. The first part 221 is positioned beside the first shelf 10 relative to the window 1011. The second part 222 protrudes from the first part 221 relative to the top side of the first shelf 10. The liquid dispensing pump 21 is connected to the second part 222 to pump the titrant to the titration container 100 of the first shelf 10. For example, the liquid dispensing pump 21 can be connected to the second part 222 through a pipe, so that the titrant enters the second part 222 and then flows through the dispensing port of the second part 222 into the titration container 100 of the first shelf 10. A vision probe 30 is installed in the first part 221. The vision probe 30 is used to detect color changes exposed in the titration container 100 exposed to the window 1011 to determine the titration endpoint, thereby enabling the titration device to automatically determine the titration endpoint and avoid errors caused by human judgment. The mechanism by which the vision probe 30 determines the titration endpoint based on color changes is existing technology; therefore, the structural composition of the vision probe 30 will not be described in detail. The robotic arm assembly 40 is used to move the titration container 100 from the first opening 1012 into the first receiving cavity 101 before titration. The robotic arm assembly 40 is also used to move the titration container 100 from the first opening 1012 out of the first receiving cavity 101 after titration. For example, the robotic arm assembly 40, the vision probe 30, and the liquid addition pump 21 can be electrically connected. The liquid addition pump 21 is used to perform the titration liquid addition operation when the robotic arm assembly 40 moves the titration container 100 to the first receiving cavity 101. The liquid addition pump 21 is used to stop adding liquid after the vision probe 30 determines the titration endpoint. The robotic arm assembly 40 is also used to move the titrated titration container 100 out of the first receiving cavity 101 after the liquid addition pump 21 stops adding liquid, thereby further improving the automation of the titration device.

[0045] In practical use, the robotic arm assembly 40 can transfer the titration container containing the sample to the first receiving cavity 101, and then the liquid addition assembly 20 performs the titration operation. During the titration process, the vision probe 30 continuously detects and records the color change in the titration container 100, thereby determining the titration endpoint based on the color change. When the vision probe 30 determines the titration endpoint, the liquid addition assembly 20 stops adding liquid, and then the titrated sample can be transferred away by the robotic arm assembly 40.

[0046] In this application, the titration container 100 is transferred by a robotic arm assembly 40 for sample delivery, reducing manual operation. This reduces the labor intensity of operators and, for samples requiring heat treatment, also reduces the risk of burns. Furthermore, the titration reagent is delivered by the dosing assembly 20 equipped with a dosing pump 21, preventing operators from coming into contact with corrosive reagents and thus improving titration safety. Additionally, the titration endpoint is determined by a vision probe 30, avoiding errors caused by human judgment and reducing operational errors. Therefore, the titration apparatus of this application improves titration operation safety, reduces operational intensity, and minimizes operational errors.

[0047] In some embodiments, the vision probe 30 is also used to record video, thereby facilitating the operator's traceability of the analysis process.

[0048] In some embodiments, the first receiving cavity 101 has a plurality of first openings 1012 arranged along the first direction X, thereby enabling multiple titration containers 100 to be placed simultaneously on the first shelf 10, and the number of dispensing pumps 21 is at least two (five dispensing pumps 21 are shown in the figure). The dispensing assembly 20 also includes a second dispensing arm 23, a first guide rail slide module 24, and a drive member 25. The second dispensing arm 23 is disposed on the top side of the first shelf 10, and the first dispensing arm 22 and the second dispensing arm 23 are connected to different dispensing pumps 21 to deliver different titration reagents to the titration containers 100. The first guide rail slide module 24 is connected to the first part 221, and the first guide rail slide module 24 is used to drive the first dispensing arm 22 to reciprocate along the first direction X, thereby enabling the titration reagent to be added into the titration containers 100 exposed in different first openings 1012, thus facilitating the titration of multiple samples. A drive unit 25 is located on the side of the first shelf 10 opposite the window 1011. For example, the drive unit 25 can be a motor. The drive unit 25 is connected to the second dispensing arm 23 and drives the second dispensing arm 23 to rotate parallel to the first direction X, thereby allowing the second dispensing arm 23 to rotate above different titration containers 100 for titration operations. Adding a second dispensing arm 23 facilitates the use of different dispensing arms to add different titration reagents, thus avoiding the cumbersome operation caused by repeatedly cleaning the dispensing arms. Furthermore, the first dispensing arm 22 and the second dispensing arm 23 employ different displacement methods to titrate samples in different titration containers 100, which helps reduce displacement time and thus improves the titration efficiency of multiple samples.

[0049] For example, the first guide rail slide module 24 may include a guide rail base, a motor, a lead screw, and a slide. The guide rail base may include a seat body and a guide rail. The seat body has a sliding groove, and the guide rail is disposed on the bottom wall of the sliding groove. The motor is disposed outside the sliding groove and is driven to the lead screw. The lead screw passes through the opposite side walls of the sliding groove and is screwed to the slide. The slide is slidably connected to the guide rail. The first part is connected to the slide, so that when the motor drives the lead screw to rotate, the slide moves along the lead screw under the action of the lead screw thread. When the rotation direction of the lead screw changes, the movement direction of the first part can be changed. It is understood that the first guide rail slide module 24 can be other structures. For example, it may include a cylinder or hydraulic cylinder, a slide, and a guide rail. The cylinder or hydraulic cylinder is driven to the slide to push the slide to reciprocate along the guide rail. That is, the first guide rail slide module 24 can adopt an existing structure.

[0050] In some embodiments, refer to Figure 1 , Figure 4 and Figure 5 The titration apparatus further includes a second shelf 50 and a first heating element 60. The second shelf 50 is positioned beside the first shelf 10, away from the liquid addition assembly 20. In this embodiment, the second shelf 50 is positioned beside the first shelf 10, away from the liquid addition assembly 20. The second shelf 50 includes a housing 51 and a partition 52. The housing 51 closes to form a second receiving cavity 501. The second receiving cavity 501 has a second opening 5013 penetrating the top of the housing 51. The partition 52 is horizontally disposed within the second receiving cavity 501 to separate a first cavity area 5011 and a second cavity area 5012. The first cavity area 5011 is disposed near the second opening 5013 for holding the titration container 100. The first heating element 60 is disposed at least within the second cavity area 5012. The first heating element 60 is used to heat and digest the water sample in the titration container 100 before titration. The robotic arm assembly 40 is also used to transfer the heated digestion-treated titration container 100 from the second shelf 50 to the first receiving cavity 101. Exemplarily, the first heating element 60 can be a heating tube. Exemplarily, the second shelf 50 can be a metal component, thereby improving thermal conductivity. Adding the second shelf 50 and the first heating element 60 improves the functionality of the titration apparatus, enabling the integration of heating digestion and titration into a single unit.

[0051] In some embodiments, the number of second openings 5013 is at least nine (nine second openings 5013 are shown in the figure), and the at least nine second openings 5013 are arranged in a square, thereby improving the efficiency of heating and digestion.

[0052] In some embodiments, refer to Figure 5The titration apparatus also includes a temperature probe 70, which is installed in the housing 51 and located in the second chamber region 5012. The addition of the temperature probe 70 can detect the temperature of the heating digestion site. On the one hand, the operation of the first heating element 60 can be stopped based on the signal fed back by the temperature probe 70, thereby avoiding excessive temperature from damaging the sample properties. On the other hand, the signal fed back by the temperature probe 70 can also be used to determine whether there is a heating malfunction.

[0053] In some embodiments, refer to Figure 4 The titration apparatus further includes a second heating element 71, which is disposed within the first receiving cavity 101. Exemplarily, the second heating element 71 may include a stacked metal block and a heating plate. Exemplarily, the metal block may have a receiving groove, the top opening of which is positioned opposite the first opening 1012. The receiving groove is used to hold the titration container 100, and the side opening of the receiving groove may be positioned opposite the window 1011. The heating plate may be disposed on the outer surface of the side wall of the receiving groove. The addition of the second heating element 71 to the titration apparatus enables the titration zone to have a heating and heat preservation function, thereby ensuring the reaction temperature of the titration zone.

[0054] In some embodiments, refer to Figure 3 The robotic arm assembly 40 includes a second guide rail slide module 41, a third guide rail slide module 42, a fourth guide rail slide module 43, and an electric gripper 44. The second guide rail slide module 41 is located on the top side of the first shelf 10. The third guide rail slide module 42 protrudes from the side end of the second guide rail slide module 41 and is used to drive the third guide rail slide module 42 to reciprocate along the first direction X. The fourth guide rail slide module 43 protrudes from the bottom end of the third guide rail slide module 42 and is used to drive the fourth guide rail slide module 43 to reciprocate along the second direction Y. The electric gripper 44 is connected to the fourth guide rail slide module 43 and is used to drive the electric gripper 44 to reciprocate along the third direction Z. The first direction X, the second direction Y, and the third direction Z are perpendicular to each other. For example, the structures of the second guide rail slide module 41, the third guide rail slide module 42, and the fourth guide rail slide module 43 can all be the same as the structure of the first guide rail slide module 24, so their specific structures will not be described in detail. It is understood that the third guide rail slide module 42 is connected to the slide of the second guide rail slide module 41 to achieve reciprocating movement; similarly, the fourth guide rail slide module 43 is connected to the slide of the third guide rail slide module 42, and the electric gripper 44 is connected to the slide of the fourth guide rail slide module 43. The structure of the robotic arm assembly 40 in this application, on the one hand, helps to reduce noise and avoid the dangers of high-pressure gas, and on the other hand, helps to reduce the integrated volume.

[0055] In another embodiment, the robotic arm assembly 40 can be a robotic hand structure.

[0056] In some embodiments, refer to Figure 1 and Figure 2 The titration apparatus also includes a housing 80, which has a third accommodating cavity (not shown) and a mounting groove 802. The third accommodating cavity has a third opening 8011 and a fourth opening 8012. The liquid addition assembly 20 is disposed within the third accommodating cavity. For example, the driving member 25 can be connected to the housing 80 via a mounting plate to fix its position. The second part 222 and the second liquid addition arm 23 both extend out of the third opening 8011. The fourth opening 8012 communicates with the mounting groove 802 and is disposed opposite the window 1011. The first shelf 10 and the second shelf 50 are connected and both are disposed within the mounting groove 802. By housing the various functional components in the housing 80, dust protection is improved, and overall transportation is facilitated. In addition, mounting the connected first shelf 10 and second shelf 50 via the mounting groove 802 helps reduce the integrated volume and improves assembly convenience.

[0057] In some embodiments, refer to Figure 1 and Figure 2 The container 80 also has a storage slot 803, which is located on the side of the mounting slot 802 adjacent to the third opening 8011. The storage slot 803 has a fifth opening 8031, which is located away from the third receiving cavity. The fifth opening 8031 ​​is used to transfer the sample rack 200 in and out of the storage slot 803. For example, the water sample that needs to be heated and digested can be placed on the sample rack 200 and transferred to the storage slot 803 to wait. Setting up the storage slot 803 to hold the external sample rack 200 helps to reduce the height difference between the sample rack 200 and the second storage rack 50, thereby facilitating the rapid transfer of samples between the two. The fifth opening 8031 ​​helps to improve the ease of picking up and placing the sample rack 200.

[0058] In some embodiments, refer to Figure 3 A mounting bracket 81 can be installed in the third accommodating cavity. The mounting bracket 81 is located on the top side of the liquid filling assembly 20. The second guide rail slide module 41 can be installed on the end of the mounting bracket 81 away from the liquid filling assembly 20. The connecting piece between the third guide rail slide module 42 and the second guide rail slide module 41 can be provided through the top of the container shell 80.

[0059] In some embodiments, refer to Figure 1 and Figure 3 Dust covers 90 can be provided on the periphery of the third guide rail slide module 42, the periphery of the fourth guide rail slide module 43, and the top side of the container shell 80.

[0060] The titration apparatus provided in this application can be used to analyze the permanganate index.

[0061] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. A titration apparatus, characterized in that, include: The first shelf has a first receiving cavity for accommodating a titration container, the first receiving cavity having a window extending through the side end of the first shelf and a first opening extending through the top end of the first shelf; A liquid dispensing assembly, comprising a liquid dispensing pump and a first liquid dispensing arm, the first liquid dispensing arm comprising a first part and a second part, the first part being positioned beside the first shelf relative to the opening, the second part being protruding from the first part relative to the top side of the first shelf, the liquid dispensing pump being connected to the second part for pumping titration reagent to the titration container of the first shelf; A vision probe, installed in the first part, is used to detect color changes inside the titration container exposed to the window to determine the titration endpoint; as well as A robotic arm assembly is used to transfer the titration container from the first opening into the first receiving cavity before titration, and the robotic arm assembly is also used to remove the titration container from the first opening into the first receiving cavity after titration.

2. The titration apparatus as described in claim 1, characterized in that, The first accommodating cavity has a plurality of first openings arranged along a first direction, the number of liquid dispensing pumps is at least two, and the liquid dispensing assembly further includes: The second dispensing arm is located on the top side of the first shelf. The first dispensing arm and the second dispensing arm are connected to different dispensing pumps to deliver different titration reagents to the titration container. A first guide rail slide module is connected to the first part, and the first guide rail slide module is used to drive the first liquid dispensing arm to reciprocate along the first direction; and A drive unit is located on the side of the first shelf opposite to the window, and the drive unit is used to drive the second liquid filling arm to rotate parallel to the first direction.

3. The titration apparatus as described in claim 1, characterized in that, The vision probe is also used to record video.

4. The titration apparatus as described in claim 2, characterized in that, Also includes: The second shelf is placed on the side of the first shelf away from the liquid addition assembly and includes a housing and a partition. The housing is closed to form a second receiving cavity. The second receiving cavity has a second opening that penetrates the top of the housing. The partition is horizontally disposed in the second receiving cavity to separate a first cavity area and a second cavity area. The first cavity area is disposed near the second opening for holding the titration container. as well as A first heating element is provided at least in the second cavity area. The first heating element is used to heat and digest the water sample in the titration container before titration. The robotic arm assembly is also used to transfer the heated and digested titration container from the second shelf to the first receiving cavity.

5. The titration apparatus as described in claim 4, characterized in that, Also includes: A temperature probe is mounted on the housing and located within the second cavity area.

6. The titration apparatus as described in claim 1, characterized in that, Also includes: The second heating element is disposed within the first accommodating cavity.

7. The titration apparatus as described in claim 2, characterized in that, The robotic arm assembly includes: The second guide rail slide module is located on the top side of the first shelf; The third guide rail slide module is provided protruding from the side end of the second guide rail slide module. The second guide rail slide module is used to drive the third guide rail slide module to reciprocate along the first direction. The fourth guide rail slide module protrudes from the bottom end of the third guide rail slide module, and the third guide rail slide module is used to drive the fourth guide rail slide module to reciprocate along the second direction; and An electric gripper is connected to the fourth guide rail slide module. The fourth guide rail slide module is used to drive the electric gripper to reciprocate along a third direction. The first direction, the second direction, and the third direction are arranged perpendicular to each other.

8. The titration apparatus as described in claim 4, characterized in that, The number of the second openings is at least nine, and the at least nine second openings are arranged in a square.

9. The titration apparatus as described in claim 4, characterized in that, Also includes: The container shell has a third accommodating cavity and a mounting groove. The third accommodating cavity has a third opening and a fourth opening. The liquid filling assembly is disposed in the third accommodating cavity. The second part and the second liquid filling arm both extend out of the third opening. The fourth opening communicates with the mounting groove and is disposed opposite to the window. The first shelf and the second shelf are connected and both are disposed in the mounting groove.

10. The titration apparatus as described in claim 9, characterized in that, The container shell also has: A storage slot is provided on the side of the mounting slot adjacent to the third opening. The storage slot has a fifth opening, which is disposed away from the third receiving cavity. The fifth opening is used to transfer the sample holder into and out of the storage slot.

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