Electrolyte analysis device

Abstract

The utility model relates to an electrolyte analysis device which comprises an electrolyte analysis component, a reagent component and a pipeline for communicating the electrolyte analysis component with the reagent component, the reagent assembly is used for providing a measuring reagent; the electrolyte analysis assembly comprises a driving mechanism, a sampling mechanism and an electrolyte analysis electrode; the driving mechanism is respectively communicated with the reagent assembly and the sampling mechanism through pipelines and is used for conveying a measuring reagent; the sampling mechanism is used for receiving a test sample and a measuring reagent and guiding to the electrolyte analysis electrode; the electrolyte analysis electrode is used for measuring the current change on the surface of the electrolyte analysis electrode, and the current change is caused by the reaction between a test sample flowing through the electrolyte analysis electrode and the electrolyte analysis electrode. The electrolyte analysis device provided by the embodiment of the utility model can simplify the use and management, is simple to operate, shortens the analysis time, is convenient and efficient to use, and improves the working efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to an electrolyte analysis device. Background Art

[0002] Ion Selective Electrode (ISE) measurement is the measurement of the concentration of electrolyte ions (such as Li+, Na+, K+, Cl-) in samples (such as blood and urine) using an electrolyte analysis device.

[0003] At present, the instruments used to measure the concentration of Li+, Na+, K+, Cl- and other ions in samples are mostly stand-alone electrolyte analyzers that can only measure the concentration of one ion in the sample. During the electrolyte testing process, the stand-alone electrolyte analyzer needs to use measurement reagents, such as drift correction solution and slope correction solution, which are cumbersome to use and manage, and the operation is complicated, resulting in a long analysis time for the stand-alone electrolyte analyzer, which is not convenient and efficient to use. Utility Model Content

[0004] In view of this, an embodiment of the utility model provides an electrolyte analysis device, which simplifies use and management by setting a driving mechanism to transport measurement reagents, and is simple to operate, thereby shortening the analysis time of the electrolyte analysis device, making it convenient and efficient to use, and improving work efficiency.

[0005] In order to solve the above technical problems, the present utility model provides the following technical solutions:

[0006] The present invention provides an electrolyte analysis device, comprising:

[0007] An electrolyte analysis component, a reagent component, and a pipeline connecting the electrolyte analysis component and the reagent component;

[0008] The reagent assembly is used to provide measurement reagents;

[0009] The electrolyte analysis component comprises: a driving mechanism, a sampling mechanism and an electrolyte analysis electrode;

[0010] The driving mechanism is connected to the reagent assembly and the sampling mechanism through pipelines, respectively, and the driving mechanism is used to transport the measuring reagent;

[0011] The sampling mechanism is used to receive the test sample and the measuring reagent, and guide them to the electrolyte analysis electrode;

[0012] The electrolyte analysis electrode is used to measure the current change on the surface of the electrolyte analysis electrode, wherein the current change is caused by the reaction between the test sample flowing through the electrolyte analysis electrode and the electrolyte analysis electrode.

[0013] In some embodiments, the electrolyte analysis device further comprises:

[0014] A detection mechanism is provided between the sampling mechanism and the electrolyte analysis electrode, and is used to measure the capacity of the test sample and the measuring reagent.

[0015] In some embodiments, the detection mechanism is a liquid detector.

[0016] In some embodiments, the sampling mechanism is a sampling pool, and the sampling pool is connected to the driving mechanism through a pipeline;

[0017] The sampling pool, the liquid detector and the electrolyte analysis electrode are vertically arranged on the same axis, so that the flow path formed among the sampling pool, the liquid detector and the electrolyte analysis electrode is vertical to the horizontal plane.

[0018] In some embodiments, the electrolyte analysis electrode comprises:

[0019] A working electrode and a reference electrode, wherein the reference electrode is used to provide a stable reference potential, and the working electrode is used to measure the potential change of the working electrode according to the reference potential.

[0020] In some embodiments, the reagent assembly comprises:

[0021] a reagent pack storing a measuring reagent;

[0022] The reagent pack is connected to the driving mechanism through a pipeline, and the driving mechanism is used to extract the measuring reagent from the reagent pack and transport it to the sampling mechanism.

[0023] In some embodiments, the reagent assembly further comprises:

[0024] a reagent connector connected to the reagent pack, wherein the reagent connector is disposed on the reagent pack;

[0025] The reagent connector is connected to the driving mechanism through a pipeline, and the driving mechanism is used to extract the measuring reagent from the reagent package through the reagent connector and transport it to the sampling mechanism.

[0026] In some embodiments, the reagent assembly further comprises:

[0027] RFID readers and RFID tags;

[0028] The radio frequency tag is arranged on the reagent pack, and the radio frequency tag is used to store the information of the measuring reagent in the reagent pack;

[0029] The radio frequency reader is arranged on the reagent connector, and is used to obtain the information of the measuring reagent in the reagent pack stored in the radio frequency tag.

[0030] In some embodiments, the driving mechanism is also used to transport waste sample liquid, the reagent pack includes three containing bags, a first containing bag of the three containing bags is used to store a first measuring reagent, a second containing bag is used to store a second measuring reagent, and a third containing bag is used to store waste sample liquid;

[0031] The driving mechanism includes three peristaltic pumps, each of which is connected to a holding bag through a pipeline. The first peristaltic pump among the three peristaltic pumps is used to extract the first measuring reagent from the first holding bag and transport it to the sampling mechanism, the second peristaltic pump is used to extract the second measuring reagent from the second holding bag and transport it to the sampling mechanism, and the third peristaltic pump is used to extract sample waste liquid and transport it to the third holding bag.

[0032] Beneficial effects of the embodiments of the utility model: Different from the prior art, the electrolyte analysis device provided by the embodiments of the utility model includes: an electrolyte analysis component, a reagent component and a pipeline connecting the electrolyte analysis component and the reagent component; the reagent component is used to provide a measuring reagent; the electrolyte analysis component includes: a driving mechanism, a sampling mechanism and an electrolyte analysis electrode; the driving mechanism is connected to the reagent component and the sampling mechanism respectively through a pipeline, and the driving mechanism is used to transport the measuring reagent; the sampling mechanism is used to receive a test sample and a measuring reagent, and guide them to the electrolyte analysis electrode; the electrolyte analysis electrode is used to measure the current change on the surface of the electrolyte analysis electrode, wherein the current change is caused by the reaction between the test sample flowing through the electrolyte analysis electrode and the electrolyte analysis electrode.

[0033] The electrolyte analysis device provided by the embodiment of the utility model simplifies use and management by providing a driving mechanism to transport measurement reagents, and is easy to operate, thereby shortening the analysis time of the electrolyte analysis device, making it convenient and efficient to use and improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope of protection. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0035] Figure 1It is a schematic diagram of the structure of an electrolyte analysis device provided by some embodiments of the utility model;

[0036] Figure 2 yes Figure 1 A schematic structural diagram of the electrolyte analysis device shown in the embodiment from another perspective.

[0037] Description of reference numerals:

[0038] 100. Electrolyte analysis device;

[0039] 10. Electrolyte analysis component; 11. Driving mechanism; 111. First peristaltic pump; 112. Second peristaltic pump; 113. Third peristaltic pump; 12. Sampling mechanism; 13. Electrolyte analysis electrode; 131. Working electrode; 132. Reference electrode;

[0040] 20. Reagent assembly; 21. Reagent pack; 22. Reagent connector;

[0041] 30. Pipeline;

[0042] 40. Testing institutions;

[0043] 50. Install components. DETAILED DESCRIPTION

[0044] In order to have a clearer understanding of the technical features, purposes and effects of the utility model, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. The detailed description of the embodiments of the utility model in the drawings below does not limit the scope of protection claimed by the utility model, but only represents the selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0045] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may also be a centered element. When an element is considered to be "connected" to another element, it may be directly connected to the other element or there may be a centered element at the same time. The terms "vertical", "horizontal", "left", "right", "first", "second", "third" and other similar expressions used in this specification are only for the purpose of convenience of explanation and to distinguish between the same items or similar items with basically the same functions and effects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features. The meaning of "multiple" refers to a number of two or more, unless otherwise clearly and specifically limited. In addition, although the functional module division is performed in the device schematic diagram, structural schematic diagram and other figures, in some cases, it can be divided into modules different from those in the device or structure.

[0046] Unless otherwise defined, the technical terms and scientific terms used in this specification have the same meanings as those generally understood by those of ordinary skill in the technical field of the present utility model. The terms used in this specification are only for the purpose of describing specific implementations and are not used to limit the present utility model. The term "and / or" used in this specification includes any and all combinations of one or more related listed items. It should be understood that the technical features involved in each implementation of the present utility model described below can be combined with each other as long as there is no conflict.

[0047] See also Figure 1 As shown, Figure 1 Schematic diagram of the structure of the electrolyte analysis device 100 provided in some embodiments of the present invention. Figure 1As shown, the electrolyte analysis device 100 includes an electrolyte analysis component 10, a reagent component 20 and a pipeline 30. Among them, the electrolyte analysis component 10 and the reagent component 20 are connected through the pipeline 30, and the reagent component 20 is used to provide the measurement reagents required for the measurement, such as drift correction liquid and slope correction liquid. Among them, the drift correction liquid is used to correct the drift or drift error that may occur in the measurement results of the measuring instrument during long-term use. Drift refers to the deviation of the measurement result of the measuring instrument after running for a period of time. This deviation is usually caused by the aging of the measuring instrument, environmental changes or other factors. When the drift correction liquid is used to correct the measurement result error of the measuring instrument, the drift of the measuring instrument can be detected by measuring the signal of the drift correction liquid. Then, through the corresponding correction steps, the reading of the measuring instrument is adjusted to eliminate the error caused by drift. The slope correction liquid is used to correct the slope error that may exist in the measuring instrument during the measurement process. The slope refers to the proportional relationship between the response speed of the measuring instrument and the ion concentration. The slope error is usually caused by changes in the sensitivity of the measuring instrument or other factors. When the slope correction fluid is used to correct the slope error of the measuring instrument, the slope error of the measuring instrument can be detected by measuring the signal of the slope correction fluid, and then the response speed of the measuring instrument is adjusted through corresponding correction steps to ensure that its response speed under different ion concentrations is correct. It should be understood that by using the drift correction fluid and the slope correction fluid to correct the deviation or error of the measuring instrument, the accuracy and reliability of the measuring instrument can be improved, and the performance of the measuring instrument can be enhanced.

[0048] Specifically, the electrolyte analysis component 10 includes a driving mechanism 11, a sampling mechanism 12 and an electrolyte analysis electrode 13. The driving mechanism 11 is connected to the reagent component 20 and the sampling mechanism 12 through a pipeline 30, and the driving mechanism 11 is used to extract the measurement reagent from the reagent component 20 and transport the measurement reagent to the sampling mechanism 12. The sampling mechanism 12 is used to receive the test sample and the measurement reagent transported by the driving mechanism 11, and guide the test sample and the measurement reagent to the electrolyte analysis electrode 13. It should be understood that the test sample can be extracted and transported to the sampling mechanism 12 by a sample needle of other equipment.

[0049] The test sample and the measuring reagent flow through the electrolyte analysis electrode 13, and various ions in the test sample react with the electrolyte analysis electrode 13, causing the current on the surface of the electrolyte analysis electrode 13 to change. The electrolyte analysis electrode 13 is used to measure the current change on the surface of the electrolyte analysis electrode 13, thereby measuring the concentrations of various ions in the test sample. After the electrolyte analysis device 100 measures for a period of time, the measurement result of the electrolyte analysis device 100 may drift or have a drift error, or the electrolyte analysis device 100 may have a slope error, etc. The use of the measuring reagent to correct the drift error of the measurement result and the slope error of the electrolyte analysis device 100 can improve the accuracy and reliability of the electrolyte analysis device 100 and enhance the performance of the electrolyte analysis device 100.

[0050] Please refer again Figure 1 In some embodiments, the electrolyte analysis device 100 further includes a detection mechanism 40, which is disposed between the sampling mechanism 12 and the electrolyte analysis electrode 13. The sampling mechanism 12 directs the test sample and the measuring reagent to the detection mechanism 40. The detection mechanism 40 is used to measure the capacity of the test sample and the measuring reagent to ensure the correct and appropriate volume of the test sample and the measuring reagent required to measure the ion concentration in the test sample, so as to accurately measure the various ion concentrations in the test sample, reduce or even avoid wasting the test sample and the measuring reagent, and reduce the test cost. Then the test sample and the measuring reagent are directed to the electrolyte analysis electrode 13, and the various ions in the test sample react with the electrolyte analysis electrode 13, causing the current on the surface of the electrolyte analysis electrode 13 to change. The electrolyte analysis electrode 13 is used to measure the current change on the surface of the electrolyte analysis electrode 13, so that the various ion concentrations in the test sample can be accurately measured, and the drift error of the measurement result and the slope error of the electrolyte analysis device 100 can be accurately corrected. In some embodiments, the detection mechanism 40 can be a liquid detector.

[0051] In some embodiments, the sampling mechanism 12 is a sampling pool, and the sampling pool is connected to the driving mechanism 11 through a pipeline 30. Among them, the sampling pool, the liquid detector and the electrolyte analysis electrode 13 are vertically arranged on the same axis, so that the circulation liquid path formed between the sampling pool, the liquid detector and the electrolyte analysis electrode 13 is perpendicular to the horizontal plane. Thus, in the entire circulation liquid path, there is no need to use a hose to connect the various components, and a hose-free connection method is realized. Only by limiting and positioning each component and cooperating with each other, the concentrations of various ions in the test sample can be measured. In the entire circulation liquid path formed between the various components, the flow direction of the test sample and the measuring reagent is normal to the horizontal plane (i.e., perpendicular to the horizontal plane), which is different from the traditional circulation liquid path parallel to the horizontal plane, reducing or even avoiding the liquid flow rate and pressure sudden changes caused by the change of the flow path in the circulation liquid path, thereby affecting the stability and accuracy of the sample test, and can accurately and stably measure the concentrations of various ions in the test sample, and improve the accuracy and stability of the sample test.

[0052] See also Figure 2 As shown, Figure 2 A schematic diagram of the structure of the electrolyte analysis device 100 provided in some embodiments of the utility model from another perspective. In some embodiments, the electrolyte analysis electrode 13 includes a working electrode 131 and a reference electrode 132. The reference electrode 132 is used to provide a stable reference potential, and the reference electrode 132 is compared with the measuring electrode 131 to facilitate the measurement and determination of the potential of the working electrode 131.

[0053] The various ions in the test sample react with the working electrode 131, thereby causing the current on the surface of the working electrode 131 to change, and then the current change on the surface of the working electrode 131 is measured and compared with the reference potential provided by the reference electrode 132, so that the potential change of the working electrode 131 can be measured, and the concentration of various ions in the test sample can be measured. The reference electrode 132 provides a stable reference potential to offset the influence of changes in environmental conditions (such as temperature, pressure, etc.) to ensure that the measurement results accurately reflect the changes in ion concentration in the test sample, rather than the influence of environmental factors, so that the electrolyte analysis electrode 13 can accurately measure the concentration of various ions in the test sample.

[0054] Please refer again Figure 2In some embodiments, the reagent assembly 20 includes a reagent pack 21, in which the reagent pack 21 stores measurement reagents required for measuring the concentrations of various ions in the test sample, such as drift correction solution and slope correction solution. The reagent pack 21 is connected to the driving mechanism 11 through a pipeline 30, and the driving mechanism 11 is used to extract the measurement reagent from the reagent pack 21 and transport the measurement reagent to the sampling mechanism 12. By storing a variety of measurement reagents in the reagent pack 21, it is possible to prevent the measurement reagents from being contaminated, reduce or even avoid the volatilization and spillage of the measurement reagents, reduce the probability of contamination of the various components of the electrolyte analysis device 100, and ensure safety during the measurement process.

[0055] In some embodiments, the reagent assembly 20 further includes a reagent connector 22, which is disposed on the reagent pack 21 and communicated with the reagent pack 21. The reagent connector 22 is communicated with the drive mechanism 11 through a pipeline 30, and the drive mechanism 11 is used to extract the measurement reagent from the reagent pack 21 through the reagent connector 22 and transport the measurement reagent to the sampling mechanism 12.

[0056] In some embodiments, the reagent assembly 20 further includes a radio frequency reader and a radio frequency tag ( Figure 1 and Figure 2 The RFID tag is provided in the reagent pack 21, and the RFID tag is used to store the information of the measuring reagent in the reagent pack 21, for example, the validity period, batch number, remaining amount and region of the measuring reagent in the reagent pack; the RFID reader is provided in the reagent connector 22, and the RFID reader is used to identify and obtain the information of the measuring reagent in the reagent pack 21 stored in the RFID tag. By providing the RFID reader in the reagent connector 22 and the RFID tag in the reagent pack 21, the measuring reagent stored in the reagent pack 21 can be quickly and accurately identified, and the measuring reagent can be quickly and accurately extracted, so as to quickly and accurately correct the error or deviation of the electrolyte analysis device 100, and improve the stability and accuracy of the sample test.

[0057] In some embodiments, the drive mechanism 11 is also used to transport waste sample liquid, wherein the waste sample liquid is the test sample flowing through the electrolyte analysis electrode 13 to react and the test sample after the measurement is completed. The reagent package 21 includes three containing bags ( Figure 1 and Figure 2 The first storage bag of the three storage bags is used to store a first measurement reagent (such as a drift correction solution), the second storage bag is used to store a second measurement reagent (such as a slope correction solution), and the third storage bag is used to store a sample waste liquid;

[0058] The driving mechanism 11 includes three peristaltic pumps, each of which is connected to a storage bag through a pipeline 30. The first peristaltic pump 111 of the three peristaltic pumps is used to extract the first measuring reagent from the first storage bag and transport it to the sampling mechanism 12. The second peristaltic pump 112 is used to extract the second measuring reagent from the second storage bag and transport it to the sampling mechanism 12. The third peristaltic pump 113 is used to extract the sample waste liquid formed after the test is completed and transport it to the third storage bag for storage. By setting a plurality of storage bags through the reagent package 21 to store a variety of measuring reagents required for measuring the ion concentration in the test sample, and to store the sample waste liquid formed after the measurement is completed, the various ion concentrations in the test sample can be accurately and stably measured, and the stability and accuracy of the sample test can be improved. By recycling and storing the sample waste liquid, the various components in the electrolyte analysis device 100 are not contaminated, kept relatively clean, and the service life is extended.

[0059] Please refer again Figure 2 In some embodiments, the electrolyte analysis device 100 further includes a mounting assembly 50. The sampling mechanism 12, the detection mechanism 40, and the electrolyte analysis motor 13 are all mounted on the mounting assembly 50. When the electrolyte analysis device 100 is set in a biochemical analyzer, the electrolyte analysis device 100 can be installed and fixed to the biochemical analyzer as a whole through the mounting assembly 50. The electrolyte analysis device 100 can be installed and fixed to the biochemical analyzer by screwing, clamping, buckling, and welding, and the embodiments of the utility model do not make any limitation.

[0060] The electrolyte analysis device provided by the embodiment of the utility model is provided with a driving mechanism to transport the measuring reagent, which simplifies the use and management, and is simple to operate, thereby shortening the analysis time of the electrolyte analysis device, making it convenient and efficient to use, and improving work efficiency. In addition, there is no need to use a hose to connect the various components in the electrolyte analysis device, realizing a hose-free connection mode; the circulating liquid path formed between the various components is perpendicular to the horizontal plane (that is, the flow direction of the test sample and the measuring reagent is normal to the horizontal plane), which is different from the traditional circulating liquid path being parallel to the horizontal plane, reducing or even avoiding the occurrence of liquid flow rate, pressure changes, etc. due to changes in the flow path in the circulating liquid path, thereby affecting the stability and accuracy of the sample test, so that the ion concentration in the test sample can be accurately and stably measured, and the accuracy and stability of the sample test can be improved.

[0061] The embodiment of the utility model also provides a biochemical analyzer, which includes any one of the electrolyte analysis devices provided by the above-mentioned embodiment of the utility model. By setting the electrolyte analysis device provided by the embodiment of the utility model in the biochemical analyzer, the biochemical analyzer has an electrolyte detection function. When measuring the concentrations of multiple ions in the same test sample, it is not necessary to manually pack the test sample and use the biochemical analyzer alone for measurement, so there is no need to maintain two devices, a stand-alone electrolyte analyzer and a biochemical analyzer, which saves manpower and material resources, effectively reduces costs, and improves work efficiency.

[0062] It should be noted that the above-mentioned technical features can be used in any combination without limitation. The above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with this technology to more clearly understand the technical features, purposes and effects of the utility model and implement them accordingly. They cannot be used to limit the scope of protection of the rights of the utility model. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the utility model, or directly or indirectly used in other related technical fields, should be included in the scope of protection of the claims of the utility model.

Claims

1. An electrolyte analysis device, characterized in that: include: An electrolyte analysis component, a reagent component, and a pipeline connecting the electrolyte analysis component and the reagent component; The reagent assembly is used to provide measurement reagents; The electrolyte analysis component comprises: a driving mechanism, a sampling mechanism and an electrolyte analysis electrode; The driving mechanism is connected to the reagent assembly and the sampling mechanism through pipelines, respectively, and the driving mechanism is used to transport the measuring reagent; The sampling mechanism is used to receive the test sample and the measuring reagent, and guide them to the electrolyte analysis electrode; The electrolyte analysis electrode is used to measure the current change on the surface of the electrolyte analysis electrode, wherein the current change is caused by the reaction between the test sample flowing through the electrolyte analysis electrode and the electrolyte analysis electrode.

2. The electrolyte analysis device according to claim 1, characterized in that: The electrolyte analysis device also includes: A detection mechanism is provided between the sampling mechanism and the electrolyte analysis electrode, and is used to measure the capacity of the test sample and the measuring reagent.

3. The electrolyte analysis device according to claim 2, characterized in that: The detection mechanism is a liquid detector.

4. The electrolyte analysis device according to claim 3, characterized in that: The sampling mechanism is a sampling pool, and the sampling pool is connected to the driving mechanism through a pipeline; The sampling pool, the liquid detector and the electrolyte analysis electrode are vertically arranged on the same axis, so that the flow path formed among the sampling pool, the liquid detector and the electrolyte analysis electrode is vertical to the horizontal plane.

5. The electrolyte analysis device according to claim 1, characterized in that: The electrolyte analysis electrode comprises: A working electrode and a reference electrode, wherein the reference electrode is used to provide a stable reference potential, and the working electrode is used to measure the potential change of the working electrode according to the reference potential.

6. The electrolyte analysis device according to any one of claims 1 to 5, characterized in that: The reagent assembly comprises: a reagent pack storing a measuring reagent; The reagent pack is connected to the driving mechanism through a pipeline, and the driving mechanism is used to extract the measuring reagent from the reagent pack and transport it to the sampling mechanism.

7. The electrolyte analysis device according to claim 6, characterized in that: The reagent assembly also includes: a reagent connector connected to the reagent pack, wherein the reagent connector is disposed on the reagent pack; The reagent connector is connected to the driving mechanism through a pipeline, and the driving mechanism is used to extract the measuring reagent from the reagent package through the reagent connector and transport it to the sampling mechanism.

8. The electrolyte analysis device according to claim 7, characterized in that: The reagent assembly also includes: RFID readers and RFID tags; The radio frequency tag is arranged on the reagent pack, and the radio frequency tag is used to store the information of the measuring reagent in the reagent pack; The radio frequency reader is arranged on the reagent connector, and is used to obtain the information of the measuring reagent in the reagent pack stored in the radio frequency tag.

9. The electrolyte analysis device according to claim 7, characterized in that: The driving mechanism is also used to transport sample waste liquid, the reagent pack includes three containing bags, the first containing bag of the three containing bags is used to store a first measuring reagent, the second containing bag is used to store a second measuring reagent, and the third containing bag is used to store sample waste liquid; The driving mechanism includes three peristaltic pumps, each of which is connected to a holding bag through a pipeline. The first peristaltic pump among the three peristaltic pumps is used to extract the first measuring reagent from the first holding bag and transport it to the sampling mechanism, the second peristaltic pump is used to extract the second measuring reagent from the second holding bag and transport it to the sampling mechanism, and the third peristaltic pump is used to extract sample waste liquid and transport it to the third holding bag.

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