Method and device for correcting flow velocity set value error of ion chromatograph and computer readable storage medium

Abstract

The invention relates to the technical field of ion chromatographs, and provides a method for correcting an error of a flow velocity set value of an ion chromatograph, which comprises the following steps of: calculating the actual flow velocity of a mobile phase and the actual rotating speed of a motor according to the theoretical flow velocity of the mobile phase of the ion chromatograph and the actual rotating speed of the motor, and performing a verification process; and finally, calculating a compression coefficient under a certain pressure-multiplying condition, and adjusting the actual rotating speed of the motor according to the compression coefficient, so that the instantaneous flow velocity of the mobile phase at the outlet is equal to the set theoretical flow velocity, thereby completing the correction of the flow velocity set value error of the ion chromatograph. Therefore, the stability of the separation effect of the sample in the ion chromatograph can be ensured, and the accuracy of the detection result is improved. The invention further discloses a device for correcting the error of the flow velocity set value of the ion chromatograph and a computer readable storage medium.

Description

Technical Field

[0001] The present invention belongs to the technical field of ion chromatographs, and in particular relates to a method and device for correcting an error in a flow rate setting value of an ion chromatograph, and a computer-readable storage medium. Background Art

[0002] At present, ion chromatographs are mainly used to analyze anions and cations in aqueous solutions. Ion separation is achieved through the reversible exchange between dissociable ions on ion exchange resins and solute ions with the same charge in the mobile phase, as well as analyzing the difference in affinity of the solute for the exchanger. In the detection process of ion chromatographs, the flow rate of the mobile phase is a key factor. Usually, the theoretical flow rate of the mobile phase is set before the detection. However, if the flow rate changes during the detection process, there will be a set value error between the actual flow rate of the mobile phase and the theoretical flow rate. If the set value error is large, it indicates that the flow rate is extremely unstable, and the retention time of each component in the sample will change, which may lead to incomplete separation or peak overlap, affecting the determination of peak area and peak height, and affecting the accurate analysis of the sample components. Moreover, if the flow rate changes suddenly during the detection process, it may cause the stationary phase to loosen or be damaged, affecting the service life of the chromatographic column.

[0003] In order to solve the above technical problems, the present invention designs a method and device for correcting the error of the flow rate setting value of an ion chromatograph, and a computer-readable storage medium. Summary of the Invention

[0004] The present invention provides a method and device for correcting an error in a flow rate setting value of an ion chromatograph, and a computer-readable storage medium, aiming to solve the problem of large error in the flow rate setting value of an ion chromatograph.

[0005] To achieve the above object, the present invention provides the following technical solution: a method for correcting an error in a flow rate setting value of an ion chromatograph, wherein the ion chromatograph includes a high-pressure cam pump, and the high-pressure cam pump includes a motor. The method for correcting an error in a flow rate setting value of the ion chromatograph comprises the following steps: S1, set the theoretical flow rate of the mobile phase of the ion chromatograph to , calculate the theoretical speed of the motor ; S2, at theoretical speed Run the motor and set the high pressure cam pump's pressure multiplier to the i-th pressure multiplier. p i After running for a period of time until the ion chromatograph reaches a steady state, the first actual flow rate of the mobile phase is measured by the balance. ; S3, according to the first actual flow rate of the mobile phase Calculate the first actual speed of the motor , the calculation formula is as follows:

[0006] S4, the first actual speed of the motor To check, at the same voltage p i When the ion chromatograph reaches a steady state, the second actual flow rate of the mobile phase is measured by the balance. ; S5, according to the second actual flow rate of the mobile phase and the first actual speed Calculate the second actual speed of the motor , the calculation formula is as follows:

[0007] S6, Judgment Is it equal to ,exist In the case of , it indicates that the calibration is correct, calculate the compression coefficient of the motor speed

[0008] exist In this case, repeat steps S4 and S5, when the actual flow rate n equal When the check is correct, calculate the actual speed of the motor , the calculation formula is as follows:

[0009] S7, calculate the compression coefficient of the motor speed , the calculation formula is as follows:

[0010] S8, according to the compression factor Adjust the actual speed of the motor so that the instantaneous flow rate of the mobile phase at the outlet is equal to the set theoretical flow rate.

[0011] Based on the above technical solution, the high-pressure cam pump further includes a cam. In step S1, the theoretical speed of the motor is The calculation formula is as follows:

[0012] In the above formula, 2.5 is the transmission ratio of the cam and the motor, 200 is the number of steps of the motor in one circle, and 60 is the unit converted to seconds. The volume of liquid discharged from the IC per cycle of the CAM run.

[0013] Based on the above technical solution, in step S2, 0≤p i ≤20, p i -p i-1 =0.1MPa.

[0014] Based on the above technical solution, step S2 includes the following steps: A1, at theoretical speed Run the motor and set the high pressure cam pump's pressure multiplier to the i-th pressure multiplier. p i , run for a period of time until the ion chromatograph reaches a steady state; A2: Use a balance to weigh the mass m of mobile phase flowing out during time t multiple times as a set of data and calculate multiple actual flow rates: F for

[0015] In the above formula, is the density of the mobile phase at the experimental temperature; A3, based on multiple actual flow rates in a set of data F Calculate the setpoint error and flow stability , the calculation formula is as follows:

[0016]

[0017] In the above formula, is the arithmetic mean of multiple actual flow rates F in the same set of data, is the maximum value of multiple actual flow rates F in the same set of data, is the minimum value of multiple actual flow rates F in the same set of data; A4, in the set value error and flow stability If both are within the target range, determine The first actual flow rate F 1.

[0018] Based on the above technical solution, in step A4, the set value error The target range is -1.5%~1.5%, and the flow stability The target range is 0~0.5%.

[0019] Based on the above technical solution, in steps S2 and S4, the time required to reach steady state is 20 minutes to 30 minutes.

[0020] Based on the above technical solution, in step S8, according to the compression coefficient Adjust the actual speed of the motor to

[0021] In the above formula, is the system constant, is the calibration factor.

[0022] Based on the above technical solution, in step S8, the set value error range between the instantaneous flow rate of the mobile phase at the outlet and the set theoretical flow rate is 0-0.17%.

[0023] In a second aspect, the present invention provides a device for correcting the error in the flow rate setting value of an ion chromatograph, comprising a processor and a memory storing program instructions, wherein the processor is configured to execute the method for correcting the error in the flow rate setting value of an ion chromatograph as described in any of the above embodiments when running the program instructions.

[0024] In a third aspect, the present invention provides a computer-readable storage medium storing program instructions, which, when executed, enable a computer to execute the method for correcting the error in the flow rate setting value of an ion chromatograph as described in any one of the above embodiments.

[0025] Compared with the related art, the present invention has the following beneficial effects: The present invention calculates the theoretical speed of the motor through the theoretical flow rate of the ion chromatograph. When the motor runs at the theoretical speed, the first actual flow rate of the ion chromatograph is measured when the high-pressure cam pump is at a certain pressure multiplication condition, and then the first actual speed of the motor is calculated based on the first actual flow rate. After the calculation is completed, a verification process needs to be performed. The actual flow rate is measured again under the same pressure multiplication condition, and it is observed whether the actual flow rate is equal to the theoretical flow rate. If they are equal, it proves that the verification is completed. If they are not equal, the measurement is repeated again until the measured actual flow rate is equal to the theoretical flow rate. The actual speed of the motor at this time is calculated, and the compression coefficient is calculated based on the actual speed. The motor speed is controlled based on the compression coefficient, so that the instantaneous flow rate of the ion chromatograph is equal to the set theoretical flow rate, the set value error is reduced, and the flow rate stability is improved.

[0026] In this way, the retention time and degree of separation of each component in the sample in the chromatographic column will be relatively stable, which can ensure the stability of the separation effect. During the ion chromatography detection process, the constant flow mode can make the residence time and concentration changes of the compound in the detector relatively stable, making the measurement of peak area and peak height more accurate. In addition, the mobile phase passes through the chromatographic column with uniform force and speed, reducing the impact and wear on the stationary phase in the chromatographic column, helping to maintain the normal function of the chromatographic column, extending its service life, and reducing its cost of use. At the same time, the constant flow state can ensure that the mobile phase flow rate is the same in each experiment, making the experimental conditions more consistent and improving the comparability and credibility of the experimental results. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only one embodiment of the present invention. Those skilled in the art can also derive other implementation drawings based on the provided drawings without inventive effort.

[0028] Figure 1 This is a flow chart of a method for correcting an error in a flow rate setting value of an ion chromatograph provided by the present invention; Figure 2 It is a fitting three-dimensional curve diagram of different pressure multiples and theoretical flow rates and compression coefficients provided by the present invention; Figure 3 The present invention is a schematic diagram of the structure of a device for correcting the error of the flow rate setting value of an ion chromatograph. DETAILED DESCRIPTION

[0029] The present invention will be further described below with reference to the accompanying drawings and examples: The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0030] In the description of the present invention, it should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0031] In the description of the present invention, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0032] Combine Figure 1 As shown, an embodiment of the present disclosure provides a method for correcting an error in a flow rate setting value of an ion chromatograph, wherein the ion chromatograph includes a high-pressure cam pump, and the high-pressure cam pump includes a motor. The method for correcting an error in a flow rate setting value of the ion chromatograph includes the following steps: S1, set the theoretical flow rate of the mobile phase of the ion chromatograph to , calculate the theoretical speed of the motor ; S2, at theoretical speed Run the motor and set the high pressure cam pump's pressure multiplier to the i-th pressure multiplier. p i After running for a period of time until the ion chromatograph reaches a steady state, the first actual flow rate of the mobile phase is measured by the balance. ; S3, according to the first actual flow rate of the mobile phase Calculate the first actual speed of the motor , the calculation formula is as follows:

[0033] S4, the first actual speed of the motor To check, at the same voltage p i When the ion chromatograph reaches a steady state, the second actual flow rate of the mobile phase is measured by the balance. ; S5, according to the second actual flow rate of the mobile phase and the first actual speed Calculate the second actual speed of the motor , the calculation formula is as follows:

[0034] S6, Judgment Is it equal to ,exist In the case of , it indicates that the calibration is correct, calculate the compression coefficient of the motor speed

[0035] exist In this case, repeat steps S4 and S5, when the actual flow rate n equal When the check is correct, calculate the actual speed of the motor , the calculation formula is as follows:

[0036] S7, calculate the compression coefficient of the motor speed , the calculation formula is as follows:

[0037] S8, according to the compression factor Adjust the actual speed of the motor so that the instantaneous flow rate of the mobile phase at the outlet is equal to the set theoretical flow rate.

[0038] A method for correcting the error in the flow rate setting value of an ion chromatograph provided in an embodiment of the present invention is adopted. The theoretical speed of the motor is calculated by the theoretical flow rate of the ion chromatograph. When the motor is running at the theoretical speed, the first actual flow rate of the ion chromatograph is measured when the high-pressure cam pump is at a certain pressure multiplication condition, and then the first actual speed of the motor is calculated based on the first actual flow rate. After the calculation is completed, a verification process is required. The actual flow rate is measured again under the same pressure multiplication condition, and it is observed whether the actual flow rate is equal to the theoretical flow rate. If they are equal, the verification is completed. If they are not equal, the measurement is repeated until the measured actual flow rate is equal to the theoretical flow rate. The actual speed of the motor at this time is calculated, and the compression coefficient is calculated based on the actual speed. The motor speed is controlled based on the compression coefficient, so that the instantaneous flow rate of the ion chromatograph is equal to the set theoretical flow rate, reducing the set value error and improving the flow rate stability.

[0039] In this way, the retention time and degree of separation of each component in the sample in the chromatographic column will be relatively stable, which can ensure the stability of the separation effect. During the ion chromatography detection process, the constant flow mode can make the residence time and concentration changes of the compound in the detector relatively stable, making the measurement of peak area and peak height more accurate. In addition, the mobile phase passes through the chromatographic column with uniform force and speed, reducing the impact and wear on the stationary phase in the chromatographic column, helping to maintain the normal function of the chromatographic column, extending its service life, and reducing its cost of use. At the same time, the constant flow state can ensure that the mobile phase flow rate is the same in each experiment, making the experimental conditions more consistent and improving the comparability and credibility of the experimental results.

[0040] Based on the above technical solution, the high-pressure cam pump further includes a cam. In step S1, the theoretical speed of the motor is The calculation formula is as follows:

[0041] In the above formula, 2.5 is the transmission ratio of the cam and the motor, 200 is the number of steps of the motor in one circle, and 60 is the unit converted to seconds. The volume of liquid discharged from the IC per cycle of the CAM run.

[0042] Based on the above technical solution, in step S2, 0≤ p i ≤20, p i -p i-1 =0.1MPa.

[0043] In this embodiment, the pressure doubling interval of the high-pressure cam pump is set at 0.1MPa. It can be understood that the pressure doubling interval can also be 0.2MPa, 0.05MPa, 0.02MPa or 0.01MPa. This application does not limit the pressure doubling interval as long as it can meet the set value error under the actual use requirements of the pump.

[0044] Based on the above technical solution, step S2 includes the following steps: A1, at theoretical speed Run the motor and set the high pressure cam pump's pressure multiplier to the i-th pressure multiplier. p i , run for a period of time until the ion chromatograph reaches a steady state; A2: Use a balance to weigh the mass m of mobile phase flowing out during time t multiple times as a set of data and calculate multiple actual flow rates: F for

[0045] In the above formula, is the density of the mobile phase at the experimental temperature; A3, based on multiple actual flow rates in a set of data F Calculate the setpoint error and flow stability , the calculation formula is as follows:

[0046]

[0047] In the above formula, is the arithmetic mean of multiple actual flow rates F in the same set of data, is the maximum value of multiple actual flow rates F in the same set of data, is the minimum value of multiple actual flow rates F in the same set of data; A4, in the set value error and flow stability If both are within the target range, determine The first actual flow rate F 1.

[0048] Based on the above technical solution, in step A4, the set value error The target range is -1.5%~1.5%, and the flow stability The target range is 0~0.5%.

[0049] According to the set value error and flow stability Two parameters determine the test data that meets the requirements to determine the first actual flow rate, when the set value error Between -1.5% and 1.5%, and the flow is stable When the value is between 0% and 0.5%, it indicates that the data of this test meets the requirements. At this time, the arithmetic average of multiple actual flow rates F in this set of data is taken as the first actual flow rate. F 1. If the setting value error Not between -1.5% and 1.5%, or flow stability If the value is not between 0 and 0.5%, it indicates that the test data does not meet the requirements. This data set should be discarded and the next data set should be tested to determine the first actual flow rate. F 1.

[0050] Based on the above technical solution, in steps S2 and S4, the time required to reach steady state is 20 minutes to 30 minutes.

[0051] Based on the above technical solution, in step S8, according to the compression coefficient Adjust the actual speed of the motor to

[0052] In the above formula, is the system constant, is the calibration factor.

[0053] Specifically, the system constant a It is only related to the entire ion chromatograph system and depends on three factors: the cam to motor transmission ratio, the displacement volume of the cam operation cycle, and the motor subdivision. b It only depends on the mechanical parameters of the high-pressure cam pump itself, such as installation parameters and interaction parameters between mechanical components. The value here is usually 0.9~1.1. At different voltage multiples p i Different theoretical flow rates under different conditions and settings Under different conditions, the fitting three-dimensional curves of different pressure multiples, theoretical flow rates and compression coefficients are obtained according to the above steps S1 to S7, as shown in FIG. Figure 2 As shown, the theoretical flow rate set in the embodiment of the present disclosure is between 0.5 and 2 mL / min. This range is the commonly used flow rate range of the mobile phase in the detection process of the ion chromatograph. The compression coefficient can also be measured in the same way in the remaining ranges, which will not be repeated here.

[0054] Based on the above technical solution, in step S8, the set value error range between the instantaneous flow rate of the mobile phase at the outlet and the set theoretical flow rate is 0-0.17%.

[0055] Combine Figure 3 As shown, an embodiment of the present disclosure provides a device for correcting an error in the flow rate setting value of an ion chromatograph, comprising a processor and a memory storing program instructions. Optionally, the device may further include a communication interface and a bus. The processor, the communication interface, and the memory may communicate with each other via the bus, and the communication interface may be used for information transmission. The processor is configured to execute the method for correcting an error in the flow rate setting value of an ion chromatograph as described in any of the above embodiments when running the program instructions.

[0056] In addition, the logic instructions in the above-mentioned memory can be implemented in the form of software functional units and can be stored in a computer-readable storage medium when sold or used as an independent product.

[0057] Memory, as a computer-readable storage medium, can be used to store software programs and computer-executable programs, such as the program instructions / modules corresponding to the methods described in the embodiments of the present disclosure. The processor executes the program instructions / modules stored in the memory to perform functional applications and data processing, thereby implementing the method for correcting the flow rate setpoint error of an ion chromatograph described in the above embodiments.

[0058] The memory may include a program storage area and a data storage area. The program storage area may store an operating system and at least one application required for a function; the data storage area may store data generated based on the use of the terminal device. Furthermore, the memory may include high-speed random access memory and non-volatile memory.

[0059] An embodiment of the present disclosure provides a computer-readable storage medium storing program instructions, which, when executed, enable a computer to execute the method for correcting an error in a flow rate setting value of an ion chromatograph as described in any one of the above embodiments.

[0060] The technical solutions of the embodiments of the present disclosure may be embodied in the form of a software product, which is stored in a storage medium and includes one or more instructions for causing a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the method described in the embodiments of the present disclosure. The aforementioned storage medium may be a non-transitory storage medium, such as a USB flash drive, a mobile hard drive, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, among other media capable of storing program code.

[0061] The above description and the accompanying drawings sufficiently illustrate the embodiments of the present disclosure to enable those skilled in the art to practice them. Other embodiments may include structural, logical, electrical, process and other changes. The embodiments represent only possible variations. Unless expressly required, individual components and functions are optional, and the order of operations may vary. Portions and features of some embodiments may be included in or replace portions and features of other embodiments. Moreover, the terms used in this application are only used to describe the embodiments and are not used to limit the claims. As used in the description of the embodiments and claims, the singular forms "a", "an" and "the" are intended to also include the plural forms unless the context clearly indicates otherwise. Similarly, the term "and / or" as used in this application means any and all possible combinations of one or more of the associated listings. In addition, when used in this application, the term "comprise" and its variations "comprises" and / or comprising refer to the presence of stated features, wholes, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or groups thereof. In the absence of further restrictions, an element defined by the sentence "comprising a..." does not exclude the presence of other identical elements in the process, method or device that includes the element. In this article, each embodiment may focus on the differences from other embodiments, and the same and similar parts between the various embodiments can be referenced to each other. For the methods, products, etc. disclosed in the embodiments, if they correspond to the method part disclosed in the embodiments, then the relevant parts can be referred to the description of the method part.

[0062] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software may depend on the specific application and design constraints of the technical solution. The technicians may use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the embodiments of the present disclosure. The technicians will clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0063] In the embodiments disclosed herein, the disclosed methods and products (including but not limited to devices and equipment) can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of units may be merely a logical functional division. In actual implementation, other divisions may be used, such as combining or integrating multiple units or components into another system, or omitting or disabling some features. Furthermore, the couplings or direct couplings or communication connections shown or discussed may be through interfaces, indirect couplings or communication connections between devices or units, and may be electrical, mechanical, or other forms. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, i.e., they may be located in one location or distributed across multiple network units. Some or all of these units may be selected to implement the embodiments according to actual needs. Furthermore, the functional units in the disclosed embodiments may be integrated into a single processing unit, each unit may exist physically separately, or two or more units may be integrated into a single unit.

[0064] The flowcharts and block diagrams in the accompanying drawings show the possible implementation architectures, functions and operations of the systems, methods and computer program products according to the embodiments of the present disclosure. In this regard, each box in the flowchart or block diagram can represent a module, program segment or part of the code, and the module, program segment or part of the code contains one or more executable instructions for implementing the specified logical functions. In some alternative implementations, the functions marked in the box can also occur in an order different from that marked in the accompanying drawings. For example, two consecutive boxes can actually be executed substantially in parallel, or they can sometimes be executed in the opposite order, which can depend on the functions involved. In the descriptions corresponding to the flowcharts and block diagrams in the accompanying drawings, the operations or steps corresponding to different boxes can also occur in an order different from that disclosed in the description, and sometimes there is no specific order between different operations or steps. For example, two consecutive operations or steps can actually be executed substantially in parallel, or they can sometimes be executed in the opposite order, which can depend on the functions involved. Each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, may be implemented by a dedicated hardware-based system that performs the specified function or action, or may be implemented by a combination of dedicated hardware and computer instructions.

[0065] The present invention has been described above by way of examples, but the present invention is not limited to the above specific embodiments. Any changes or modifications based on the present invention fall within the scope of protection claimed by the present invention.

Claims

1. A method for correcting the error of the flow rate setting value of an ion chromatograph, characterized in that: The ion chromatograph includes a high-pressure cam pump, and the high-pressure cam pump includes a motor. The method for correcting the error of the flow rate setting value of the ion chromatograph includes the following steps: S1, set the theoretical flow rate of the mobile phase of the ion chromatograph to , calculate the theoretical speed of the motor ; S2, at theoretical speed Run the motor and set the high pressure cam pump's pressure multiplier to the i-th pressure multiplier. p i After running for a period of time until the ion chromatograph reaches a steady state, the first actual flow rate of the mobile phase is measured by the balance. ; S3, according to the first actual flow rate of the mobile phase Calculate the first actual speed of the motor , the calculation formula is as follows: S4, the first actual speed of the motor To check, at the same voltage p i When the ion chromatograph reaches a steady state, the second actual flow rate of the mobile phase is measured by the balance. ; S5, according to the second actual flow rate of the mobile phase and the first actual speed Calculate the second actual speed of the motor , the calculation formula is as follows: S6, Judgment Is it equal to ,exist In the case of , it indicates that the calibration is correct, calculate the compression coefficient of the motor speed exist In this case, repeat steps S4 and S5, when the actual flow rate n equal When the check is correct, calculate the actual speed of the motor , the calculation formula is as follows: S7, calculate the compression coefficient of the motor speed , the calculation formula is as follows: S8, according to the compression factor Adjust the actual speed of the motor so that the instantaneous flow rate of the mobile phase at the outlet is equal to the set theoretical flow rate.

2. The method for correcting the flow rate setting value error of an ion chromatograph according to claim 1, characterized in that: The high-pressure cam pump also includes a cam. In step S1, the theoretical speed of the motor The calculation formula is as follows: In the above formula, 2.5 is the transmission ratio of the cam and the motor, 200 is the number of steps of the motor in one circle, and 60 is the unit converted to seconds. The volume of liquid discharged from the IC per cycle of the CAM run.

3. The method for correcting the flow rate setting value error of an ion chromatograph according to claim 1, characterized in that: In step S2, 0≤ p i ≤20, p i -p i-1 =0.1MPa.

4. The method for correcting the flow rate setting value error of an ion chromatograph according to claim 1, characterized in that: The step S2 comprises the following steps: A1, at theoretical speed Run the motor and set the high pressure cam pump's pressure multiplier to the i-th pressure multiplier. p i , run for a period of time until the ion chromatograph reaches a steady state; A2: Use a balance to weigh the mass m of mobile phase flowing out during time t multiple times as a set of data and calculate multiple actual flow rates: F for In the above formula, is the density of the mobile phase at the experimental temperature; A3, based on multiple actual flow rates in a set of data F Calculate the setpoint error and flow stability , the calculation formula is as follows: In the above formula, is the arithmetic mean of multiple actual flow rates F in the same set of data, is the maximum value of multiple actual flow rates F in the same set of data, is the minimum value of multiple actual flow rates F in the same set of data; A4, in the set value error and flow stability If both are within the target range, determine The first actual flow rate F 1.

5. The method for correcting the flow rate setting value error of an ion chromatograph according to claim 4, characterized in that: In step A4, the set value error The target range is -1.5%~1.5%, and the flow stability The target range is 0~0.5%.

6. The method for correcting the flow rate setting value error of an ion chromatograph according to claim 1, characterized in that: In the steps S2 and S4, the time required to reach a steady state is 20 to 30 minutes.

7. The method for correcting the flow rate setting value error of an ion chromatograph according to claim 1, characterized in that: In step S8, according to the compression coefficient Adjust the actual speed of the motor to In the above formula, is the system constant, is the calibration factor.

8. The method for correcting the flow rate setting value error of an ion chromatograph according to claim 1, characterized in that: In step S8, the set value error range between the instantaneous flow rate of the mobile phase at the outlet and the set theoretical flow rate is 0-0.17%.

9. A device for correcting an error in a flow rate setting value of an ion chromatograph, comprising a processor and a memory storing program instructions, characterized in that: The processor is configured to execute the method for correcting an error in a flow rate setting value of an ion chromatograph according to any one of claims 1 to 8 when running the program instructions.

10. A computer-readable storage medium storing program instructions, characterized in that: When the program instructions are executed, the computer is configured to execute the method for correcting the error in the flow rate setting value of an ion chromatograph according to any one of claims 1 to 8.

Images