Continuous flow ion chromatography combination system
By designing a continuous flow ion chromatography system and employing a method for separate detection of total phosphorus and inorganic phosphorus, the problem of large detection errors in phosphorus-containing scale inhibitors was solved, enabling online, rapid, and accurate multi-component phosphorus content analysis.
Patent Information
- Application Number
- CN202423299584.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2026-01-27
- Estimated Expiration
- 2034-12-31
AI Technical Summary
Existing technologies cannot achieve online, rapid, and large-scale detection of total phosphate, organic phosphorus, and inorganic phosphorus content in phosphorus-containing scale inhibitors, and there are also problems with large detection errors.
Design a continuous flow ion chromatography system, including a continuous flow module for total phosphorus content analysis and an ion chromatography module for inorganic phosphorus content analysis. The system detects the total phosphorus and inorganic phosphorus contents separately using a peristaltic pump and an injection valve, and calculates the organic phosphorus content using the difference, thus achieving simultaneous online detection of samples.
It enables accurate, rapid, and automated detection of total phosphate, organic phosphorus, and inorganic phosphorus content in phosphorus-containing scale inhibitors, reducing human interference and cross-contamination, and improving detection efficiency and accuracy.
Smart Images
Figure CN223841845U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of industrial water treatment technology, and in particular to a continuous flow ion chromatography system. Background Technology
[0002] Scale inhibitors are agents that can disperse sparingly soluble inorganic salts in water, prevent or interfere with the precipitation and scaling of sparingly soluble inorganic salts on metal surfaces, and maintain good heat transfer performance in metal equipment. They mainly include inorganic phosphorus-containing polymer scale inhibitors, complex phosphates, organic phosphates, and other low-phosphorus or phosphorus-free agents. Phosphorus-containing scale inhibitors are widely used in circulating cooling water systems due to their good chemical stability, ability to withstand high temperatures and pH levels, and compatibility with other scale inhibitors.
[0003] Total phosphate, organic phosphorus, and inorganic phosphorus content are important indicators for evaluating the performance of phosphorus-containing scale inhibitors. Currently, the main methods for detecting phosphorus content in phosphorus-containing scale inhibitors include: spectrophotometry, gravimetric analysis, inductively coupled plasma atomic emission spectrometry (ICP-AES), inductively coupled plasma mass spectrometry (ICP-MS), volumetric methods, ion chromatography, gas chromatography-mass spectrometry (GC-MS), and liquid chromatography-mass spectrometry (LC-MS).
[0004] During the testing process, it was found that existing methods can only use different instruments to detect the total phosphate, organic phosphorus, and inorganic phosphorus content in phosphorus-containing scale inhibitors separately, which is labor-intensive and time-consuming, and cannot achieve online, rapid, and large-scale sample detection. Furthermore, due to the volatility of phosphate solutions, detection errors caused by inconsistent sample testing times cannot be avoided, resulting in low accuracy. Therefore, how to provide a device that can simultaneously and online detect the total phosphate, organic phosphorus, and inorganic phosphorus content of phosphorus-containing scale inhibitors is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content
[0005] The purpose of this invention is to provide a continuous flow ion chromatography system that solves the technical problem that current methods for detecting phosphorus content in phosphorus-containing scale inhibitors cannot achieve simultaneous online detection of samples in a single operation.
[0006] To achieve the above objectives, this utility model provides a continuous flow ion chromatography system, comprising:
[0007] A continuous flow module for total phosphorus content analysis is used to detect total phosphorus content. The continuous flow module for total phosphorus content analysis includes a peristaltic pump and a flow detection cell, wherein the peristaltic pump is connected to the flow detection cell.
[0008] An inorganic phosphorus content analysis ion chromatography module is used to detect inorganic phosphorus content. The inorganic phosphorus content analysis ion chromatography module includes an injection valve and a detector, and the injection valve is connected to the detector.
[0009] The pretreated phosphorus-containing scale inhibitor test solution flows to the total phosphorus content analysis continuous flow module and the inorganic phosphorus content analysis ion chromatography module, respectively. The pretreated phosphorus-containing scale inhibitor test solution enters the total phosphorus content analysis continuous flow module through the peristaltic pump, and the total phosphorus content is detected by the flow detection cell. The pretreated phosphorus-containing scale inhibitor test solution enters the inorganic phosphorus content analysis ion chromatography module through the injection valve, and the inorganic phosphorus content is detected by the detector. The organic phosphorus content is the difference between the total phosphorus content and the inorganic phosphorus content.
[0010] Preferably, the continuous flow module for total phosphorus content analysis further includes a mixing reaction coil, an ultraviolet digester, a first heating reaction tank, and a second heating reaction tank. The phosphorus-containing scale inhibitor test solution, after pretreatment, is processed by the mixing reaction coil, the ultraviolet digester, the first heating reaction tank, and the second heating reaction tank, and the total phosphorus content is detected by the flow detection tank.
[0011] Preferably, the inorganic phosphorus content analysis ion chromatography module further includes a guard column, an ion chromatography column, and a suppressor. After the phosphorus-containing scale inhibitor test solution is pretreated, it is processed by the guard column, the ion chromatography column, and the suppressor, and the inorganic phosphorus content is obtained by the detector.
[0012] Preferably, it further includes:
[0013] The solution pretreatment device is connected to the test solution containing phosphorus scale inhibitor through a pipeline, and is used to precipitate, remove impurities and filter the test solution containing phosphorus scale inhibitor.
[0014] An automatic sampler, connected to the solution pretreatment device, includes a dilution injection device for diluting a phosphorus-containing scale inhibitor solution. The dilution injection device is equipped with an injection pump connected to the injection valve and the peristaltic pump for injecting the diluted phosphorus-containing scale inhibitor test solution into the injection valve and the peristaltic pump.
[0015] Preferably, the inorganic phosphorus content analysis ion chromatography module further includes:
[0016] A rinse solution bottle containing rinse solution;
[0017] A high-pressure pump, connected to the eluent bottle, is used to deliver the eluent into the sample inlet valve;
[0018] An inhibitor liquid delivery device, connected to the inhibitor, is used to supply inhibitor liquid to the inhibitor.
[0019] Preferably, it further includes:
[0020] Workstations, including personal computers;
[0021] A waste liquid device, connected to the injection valve, the suppressor, the detector, and the flow detection cell, is used to collect waste liquid;
[0022] The control device is connected to the peristaltic pump, the ultraviolet digester, the first heating reaction cell, the second heating reaction cell, the flow detection cell, the autosampler, the injection valve, the high-pressure pump, the detector, and the workstation via signal connection.
[0023] The control device converts the electrical signals of ion concentration output from the flow detection cell and the detector into digital signals and transmits them to the personal computer, which then performs ion analysis on the transmitted digital signals.
[0024] Preferably, the dilution injection device is further provided with a piston pump, a reagent sprayer and a sampling needle. The piston pump is used to control the suction and spray of the phosphorus scale inhibitor test solution, and the reagent sprayer is used to apply the diluent and clean the sampling needle.
[0025] Preferably, the dilution injection device is also connected via pipeline to a collection point for the phosphorus-containing scale inhibitor test solution and a needle washing water point.
[0026] Preferably, the rinsing solution in the rinsing solution bottle is a carbonate or bicarbonate type rinsing solution.
[0027] Preferably, a metering loop is provided inside the injection valve.
[0028] Compared to the aforementioned background technology, the continuous flow ion chromatography system provided by this utility model, after pretreatment, directs the phosphorus-containing scale inhibitor test solution to a total phosphorus content analysis continuous flow module and an inorganic phosphorus content analysis ion chromatography module, respectively. The total phosphorus content is detected by the total phosphorus content analysis continuous flow module, the inorganic phosphorus content by the inorganic phosphorus content analysis ion chromatography module, and the organic phosphorus content is calculated by subtracting the total phosphorus content from the inorganic phosphorus content. This achieves simultaneous online detection of total phosphate, organic phosphorus, and inorganic phosphorus content in the phosphorus-containing scale inhibitor. The total phosphorus content analysis continuous flow module and the inorganic phosphorus content analysis ion chromatography module operate independently without interference, preventing cross-contamination of the phosphorus-containing water treatment agent samples in the two modules, reducing the interference of human factors on the test results, and ensuring high accuracy. The entire detection process is highly automated, reducing the labor intensity of operators and increasing detection efficiency. Attached Figure Description
[0029] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.
[0030] Figure 1 This is a schematic diagram of the continuous flow ion chromatography system provided in an embodiment of the present invention;
[0031] Figure 1 Chinese figure labels: 1. Peristaltic pump; 2. Mixing reaction coil; 3. Ultraviolet digester; 4. First heating reaction cell; 5. Second heating reaction cell; 6. Flow detection cell; 7. Solution pretreatment device; 8. Autosampler; 9. Injection valve; 10. Quantitative loop; 11. Eluent bottle; 12. High-pressure pump; 13. Guard column; 14. Ion chromatography column; 15. Suppressor liquid delivery device; 16. Suppressor; 17. Detector; 18. Control device; 19. Workstation; 20. Waste liquid device. Detailed Implementation
[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0033] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0034] This invention provides a continuous flow ion chromatography system for detecting the total phosphate, organic phosphorus, and inorganic phosphorus content in phosphorus-containing scale inhibitors. The total phosphorus content in the phosphorus-containing scale inhibitor is detected by a continuous flow module, the inorganic phosphorus content is detected by an ion chromatography module, and the organic phosphorus content is calculated by subtracting the total phosphorus content from the inorganic phosphorus content. This system enables simultaneous online detection of the total phosphate, organic phosphorus, and inorganic phosphorus content in phosphorus-containing scale inhibitors, effectively reducing detection errors and ensuring detection accuracy.
[0035] Please refer to Figure 1The continuous flow ion chromatography system provided by this utility model includes a continuous flow module for total phosphorus content analysis and an ion chromatography module for inorganic phosphorus content analysis. The continuous flow module for total phosphorus content analysis is used to detect total phosphorus content and includes a peristaltic pump 1 and a flow detection cell 6, with the peristaltic pump 1 connected to the flow detection cell 6. The ion chromatography module for inorganic phosphorus content analysis is used to detect inorganic phosphorus content and includes an injection valve 9 and a detector 17, with the injection valve 9 connected to the detector 17.
[0036] The pretreated phosphorus-containing scale inhibitor test solution flows to the total phosphorus content analysis continuous flow module and the inorganic phosphorus content analysis ion chromatography module, respectively. The pretreated phosphorus-containing scale inhibitor test solution enters the total phosphorus content analysis continuous flow module through peristaltic pump 1, and the total phosphorus content is obtained by detection in the flow detection cell 6. The pretreated phosphorus-containing scale inhibitor test solution enters the inorganic phosphorus content analysis ion chromatography module through injection valve 9, and the inorganic phosphorus content is obtained by detection in detector 17. The organic phosphorus content is the difference between the total phosphorus content and the inorganic phosphorus content.
[0037] This configuration allows the continuous flow ion chromatography module for total phosphorus analysis and the ion chromatography module for inorganic phosphorus analysis to operate independently without interference. The total phosphate, organic phosphorus, and inorganic phosphorus contents in phosphorus-containing scale inhibitors can be detected simultaneously in a single test. Samples from the two modules will not cross-contaminate, reducing the impact of human factors on the test results and ensuring high accuracy. The entire testing process is highly automated, reducing the workload of operators and increasing testing efficiency. This continuous flow ion chromatography system can be applied to industrial circulating water testing in the water treatment field, enabling accurate, high-volume, and rapid determination of the total phosphate, organic phosphorus, and inorganic phosphorus contents in phosphorus-containing scale inhibitors and industrial circulating water, demonstrating strong applicability.
[0038] Please refer to Figure 1 In the continuous flow ion chromatography system provided by this utility model, the continuous flow module for total phosphorus content analysis also includes a mixing reaction coil 2, an ultraviolet digester 3, a first heating reaction cell 4, and a second heating reaction cell 5. The phosphorus-containing scale inhibitor test solution, after pretreatment, is processed by the mixing reaction coil 2, the ultraviolet digester 3, the first heating reaction cell 4, and the second heating reaction cell 5, and the total phosphorus content is obtained by detection through the flow detection cell 6.
[0039] Specifically, the continuous flow module for total phosphorus content analysis operates as follows: The phosphorus-containing scale inhibitor test solution is mixed with potassium persulfate A2 solution and then subjected to ultraviolet digestion in ultraviolet digester 3. The digestion product is then mixed with sulfuric acid solution A3, and the mixture flows through the first heated reaction tank 4 to obtain an acidic digestion solution. This acidic digestion solution is then mixed with sodium hydroxide solution A5 to obtain a neutralized digestion solution. This neutralized digestion solution is then mixed with a molybdenum-antimony mixed solution A6 and an ascorbic acid solution A7, and the mixture flows through the second heated reaction tank 5 to generate an antimony-phosphate-molybdate complex solution. The antimony-phosphate-molybdate complex solution and the ascorbic acid solution A7 flow into the detection tank 6, where ascorbic acid A7 is used as a colorimetric reagent for absorbance determination, thereby determining the total phosphorus content in the phosphorus-containing water treatment agent sample. Preferably, the temperature of the first heated reaction tank 4 is 110°C, and the temperature of the second heated reaction tank 5 is 40°C.
[0040] Please refer to Figure 1 In the continuous flow ion chromatography system provided by this utility model, the inorganic phosphorus content analysis ion chromatography module also includes a guard column 13, an ion chromatography column 14, and an inhibitor 16. After the phosphorus-containing scale inhibitor test solution is pretreated by the guard column 13, the ion chromatography column 14, and the inhibitor 16, the inorganic phosphorus content is detected by the detector 17.
[0041] Specifically, the working process of the ion chromatography module for inorganic phosphorus content analysis is as follows: The phosphorus-containing scale inhibitor test solution is mixed with the eluent 11 at the injection valve 9 and then enters the guard column 13. After separation by the ion chromatography column 14, it enters the suppressor 16 to reduce background conductivity, and then the detector 17 detects the inorganic phosphorus content in the phosphorus-containing water treatment agent sample. The organic phosphorus content is the difference between the total phosphorus content and the inorganic phosphorus content.
[0042] The guard column 13 uses the same specialized packing material as the ion chromatography column 14, serving to protect the ion chromatography column 14. The ion chromatography column 14 can be any type of surface-aminated polymer resin column. The suppressor 16 is a self-regenerating anion suppressor, which converts the eluent into carbonic acid online, reducing the background conductivity of the mobile phase, increasing the conductivity response value of the analyte ion, and allowing the "counterion" to enter the waste liquid device 20, thereby improving sensitivity. The detector 17 can be a pentode conductivity detector.
[0043] Preferably, the continuous flow ion chromatography system provided by this utility model further includes a solution pretreatment device 7 and an autosampler 8. The solution pretreatment device 7 and the autosampler 8 are used to pretreat the phosphorus-containing scale inhibitor test solution. The solution pretreatment device 7 is connected to the phosphorus-containing scale inhibitor test solution through a pipeline. The solution pretreatment device 7 is used to precipitate, remove impurities, and filter the phosphorus-containing scale inhibitor test solution. The autosampler 8 is connected to the solution pretreatment device 7 and includes a dilution injection device. The dilution injection device is used to dilute the phosphorus-containing scale inhibitor solution. The dilution injection device is equipped with an injection pump, which is connected to the injection valve 9 and the peristaltic pump 1. It is used to inject the diluted phosphorus-containing scale inhibitor test solution into the injection valve 9 and the peristaltic pump 1.
[0044] The phosphorus-containing scale inhibitor test solution is transported into the pretreatment device 7 through a pipeline. After precipitation, impurity removal, and filtration in the pretreatment device 7, the phosphorus-containing scale inhibitor test solution enters the autosampler 8. The dilution injection device of the autosampler 8 dilutes the phosphorus-containing scale inhibitor solution by a corresponding multiple. The built-in injection pump of the dilution injection device injects the diluted phosphorus-containing scale inhibitor test solution into the injection valve 9 and the peristaltic pump 1. Thus, a portion of the pretreated phosphorus-containing scale inhibitor test solution is input into the total phosphorus content analysis continuous flow module to detect the total phosphorus content, and the other portion of the phosphorus-containing scale inhibitor test solution is input into the inorganic phosphorus content analysis ion chromatography module to detect the inorganic phosphorus content.
[0045] Please refer to Figure 1 The inorganic phosphorus content analysis ion chromatography module also includes an eluent bottle 11, a high-pressure pump 12, and an inhibitor liquid delivery device 15; the eluent bottle 11 contains eluent; the high-pressure pump 12 is connected to the eluent bottle 11 and is used to deliver the eluent into the injection valve 9; the inhibitor liquid delivery device 15 is connected to the inhibitor 16 and is used to input inhibitor liquid into the inhibitor 16.
[0046] When the inorganic phosphorus content is detected by the ion chromatography module, the high-pressure pump 12 carries the eluent from the eluent bottle 11 into the injection valve 9. The eluent is mixed with the pretreated phosphorus-containing scale inhibitor solution to be tested, and then enters the guard column 13. After separation by the ion chromatography column 14, it enters the suppressor 16. The suppressor liquid delivery device 15 inputs suppressor liquid into the suppressor 16 to reduce background conductivity. Finally, the inorganic phosphorus content in the phosphorus-containing water treatment agent sample is detected by the detector 17. The high-pressure pump 12 is a high-pressure, low-flow, and adjustable digital display high-pressure horizontal flow pump.
[0047] Please refer to Figure 1The continuous flow ion chromatography system provided by this utility model also includes a workstation 19, a waste liquid device 20, and a control device 18. The workstation 19 includes a personal computer and console software. The waste liquid device 20 is connected to the injection valve 9, the suppressor 16, the detector 17, and the flow detection cell 6 for collecting waste liquid. The control device 18 is connected to the peristaltic pump 1, the ultraviolet digester 3, the first heating reaction cell 4, the second heating reaction cell 5, the flow detection cell 6, the autosampler 8, the injection valve 9, the high-pressure pump 12, the detector 17, and the workstation 19. The control device 18 converts the electrical signals of ion component concentration output from the flow detection cell 6 and the detector 17 into digital signals and transmits them to the personal computer. The console software performs ion analysis on the transmitted digital signals and generates a report after the ion analysis, realizing online detection and analysis of the phosphorus-containing scale inhibitor test solution.
[0048] Preferably, in this embodiment, the dilution injection device is equipped with a piston pump, a reagent sprayer, and a sampling needle. The piston pump is used to control the suction and spray of the pretreated phosphorus-containing scale inhibitor test solution. The reagent sprayer is used to apply the diluent and clean the sampling needle. The reagent sprayer cleans the sampling needle by spraying out a needle cleaning solution.
[0049] Preferably, in this embodiment, the dilution injection device is also connected to a collection point for the phosphorus-containing scale inhibitor test solution and a needle washing water level via pipeline, thereby automatically completing dilution and a series of dilution tasks, including standard sample preparation.
[0050] Please refer to Figure 1 In this embodiment, the injection valve 9 is a solenoid two-position six-way valve with injection and analysis positions. A quantitative ring 10 is provided inside the injection valve 9. By setting the quantitative ring 10, the accuracy and consistency of injection are ensured.
[0051] Preferably, the eluent in the eluent bottle 11 is a carbonate or bicarbonate type eluent. When the inorganic phosphorus content is detected by the ion chromatography module for inorganic phosphorus content analysis, the high-pressure pump 12 carries the eluent in the eluent bottle 11 into the injection valve 9 for isocratic rinsing.
[0052] In operation, the continuous flow ion chromatography system provided by this invention firstly delivers the phosphorus-containing scale inhibitor test solution through a pipeline into the pretreatment device 7. After precipitation, impurity removal, and filtration in the pretreatment device 7, the phosphorus-containing scale inhibitor test solution enters the autosampler 8. The dilution injection device of the autosampler 8 dilutes the phosphorus-containing scale inhibitor solution by a corresponding multiple. The built-in injection pump of the dilution injection device injects the diluted phosphorus-containing scale inhibitor test solution into the injection valve 9 and the peristaltic pump 1. Thus, a portion of the pretreated phosphorus-containing scale inhibitor test solution is input into the total phosphorus content analysis continuous flow module to detect the total phosphorus content, while the other portion of the phosphorus-containing scale inhibitor test solution is input into the inorganic phosphorus content analysis ion chromatography module to detect the inorganic phosphorus content.
[0053] The working process of the continuous flow module for total phosphorus content analysis is as follows:
[0054] a) Air B, potassium persulfate solution A2, phosphorus-containing scale inhibitor test solution (after being treated by pretreatment device 7 and autosampler 8), and sulfuric acid solution A3 are sequentially introduced into peristaltic pump 1; the phosphorus-containing scale inhibitor test solution is mixed with potassium persulfate solution A2, and then subjected to ultraviolet digestion in ultraviolet digester 3; the digestion product is then mixed with sulfuric acid solution A3, and the mixture flows through the first heated reaction tank 4 to obtain acidic digestion solution;
[0055] b) Air B and sodium hydroxide solution A5 are sequentially introduced into peristaltic pump 1; the acidic digestion solution flowing out of the first heating reaction tank 4 is mixed with the introduced sodium hydroxide solution A5 to neutralize the remaining sulfuric acid in the acidic digestion solution, thus obtaining a neutralized digestion solution;
[0056] c) A molybdenum-antimony mixed solution A6 and ascorbic acid solution A7 are sequentially introduced into peristaltic pump 1. The molybdenum-antimony mixed solution A6 contains ammonium molybdate, sulfuric acid, and potassium antimony tartrate. The neutralization and digestion solution is mixed with the introduced molybdenum-antimony mixed solution A6 and ascorbic acid solution A7. After mixing, the solution flows through the second heating reaction tank 5 and is heated in the second heating reaction tank 5 to generate an antimony-phosphate-molybdate complex solution.
[0057] d) The antimony-phosphate-molybdate complex solution and ascorbic acid solution A7 flow into the flow detection cell 6. Ascorbic acid A7 is used as a colorimetric reagent to determine the absorbance, thereby obtaining the total phosphorus content in the phosphorus-containing water treatment agent sample.
[0058] The working process of the ion chromatography module for inorganic phosphorus content analysis is as follows:
[0059] The phosphorus-containing scale inhibitor test solution is mixed with the eluent 11 brought in by the high-pressure pump 12 after being injected through the injection valve 9. After mixing, it enters the guard column 13, is separated by the ion chromatography column 14, enters the suppressor 16 to reduce the background conductivity, and is then detected by the detector 17 to detect the content of inorganic phosphorus (phosphate and phosphite) in the phosphorus-containing water treatment agent sample.
[0060] In this way, the total phosphorus content and inorganic phosphorus content in phosphorus-containing scale inhibitors can be detected. The organic phosphorus content is the difference between the total phosphorus content and the inorganic phosphorus content. This allows for simultaneous online detection of total phosphate, organic phosphorus, and inorganic phosphorus content in phosphorus-containing scale inhibitors, resulting in high detection efficiency and accuracy. The continuous flow ion chromatography system provided by this invention can be used for phosphorus content detection in industrial circulating water.
[0061] It should be noted that in this specification, relational terms such as first and second are used only to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.
[0062] This article uses specific examples to illustrate the principles and implementation methods of this utility model. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principles of this utility model, and these improvements and modifications also fall within the protection scope of this utility model.
Claims
1. A continuous flow ion chromatography system, characterized in that, include: A continuous flow module for total phosphorus content analysis is used to detect total phosphorus content. The continuous flow module for total phosphorus content analysis includes a peristaltic pump and a flow detection cell, wherein the peristaltic pump is connected to the flow detection cell. An inorganic phosphorus content analysis ion chromatography module is used to detect inorganic phosphorus content. The inorganic phosphorus content analysis ion chromatography module includes an injection valve and a detector, and the injection valve is connected to the detector. The pretreated phosphorus-containing scale inhibitor test solution flows to the total phosphorus content analysis continuous flow module and the inorganic phosphorus content analysis ion chromatography module, respectively. The pretreated phosphorus-containing scale inhibitor test solution enters the total phosphorus content analysis continuous flow module through the peristaltic pump, and the total phosphorus content is detected by the flow detection cell. The pretreated phosphorus-containing scale inhibitor test solution enters the inorganic phosphorus content analysis ion chromatography module through the injection valve, and the inorganic phosphorus content is detected by the detector. The organic phosphorus content is the difference between the total phosphorus content and the inorganic phosphorus content.
2. The continuous flow ion chromatography system according to claim 1, characterized in that, The continuous flow module for total phosphorus content analysis also includes a mixing reaction coil, an ultraviolet digester, a first heating reaction tank, and a second heating reaction tank. The phosphorus-containing scale inhibitor test solution, after pretreatment, is processed by the mixing reaction coil, the ultraviolet digester, the first heating reaction tank, and the second heating reaction tank, and the total phosphorus content is obtained by detection through the flow detection tank.
3. The continuous flow ion chromatography system according to claim 2, characterized in that, The inorganic phosphorus content analysis ion chromatography module also includes a guard column, an ion chromatography column, and a suppressor. After the phosphorus-containing scale inhibitor test solution is pretreated, it is processed by the guard column, the ion chromatography column, and the suppressor, and the inorganic phosphorus content is obtained by the detector.
4. The continuous flow ion chromatography system according to claim 3, characterized in that, Also includes: The solution pretreatment device is connected to the test solution containing phosphorus scale inhibitor through a pipeline, and is used to precipitate, remove impurities and filter the test solution containing phosphorus scale inhibitor. An automatic sampler, connected to the solution pretreatment device, includes a dilution injection device for diluting a phosphorus-containing scale inhibitor solution. The dilution injection device is equipped with an injection pump connected to the injection valve and the peristaltic pump for injecting the diluted phosphorus-containing scale inhibitor test solution into the injection valve and the peristaltic pump.
5. The continuous flow ion chromatography system according to claim 4, characterized in that, The inorganic phosphorus content analysis ion chromatography module also includes: A rinse solution bottle containing rinse solution; A high-pressure pump, connected to the eluent bottle, is used to deliver the eluent into the sample inlet valve; An inhibitor liquid delivery device, connected to the inhibitor, is used to input inhibitor liquid into the inhibitor.
6. The continuous flow ion chromatography system according to claim 5, characterized in that, Also includes: Workstations, including personal computers; A waste liquid device, connected to the injection valve, the suppressor, the detector, and the flow detection cell, is used to collect waste liquid; The control device is connected to the peristaltic pump, the ultraviolet digester, the first heating reaction cell, the second heating reaction cell, the flow detection cell, the autosampler, the injection valve, the high-pressure pump, the detector, and the workstation via signal connection. The control device converts the electrical signals of ion concentration output from the flow detection cell and the detector into digital signals and transmits them to the personal computer, which then performs ion analysis on the transmitted digital signals.
7. The continuous flow ion chromatography system according to claim 4, characterized in that, The dilution injection device is also equipped with a piston pump, a reagent sprayer, and a sampling needle. The piston pump is used to control the suction and spray of the phosphorus scale inhibitor test solution, and the reagent sprayer is used to apply the diluent and clean the sampling needle.
8. The continuous flow ion chromatography system according to claim 4, characterized in that, The dilution injection device is also connected via pipeline to a collection point for the phosphorus-containing scale inhibitor test solution and a needle washing water level.
9. The continuous flow ion chromatography system according to claim 5, characterized in that, The rinsing solution in the rinsing solution bottle is a carbonate or bicarbonate type rinsing solution.
10. The continuous flow ion chromatography system according to any one of claims 1 to 9, characterized in that, The injection valve is equipped with a metering loop.