Intelligent analyzer with sample dilution function

Abstract

The utility model discloses an intelligent analyzer with a sample dilution function. The intelligent analyzer with the sample dilution function comprises an ion chromatograph; the concentration detection module comprises a first driving pump, a second driving pump, a third driving pump, a quantitative loop, a multi-way valve, a first conductivity detector and a mixer, and the concentration regulation module comprises a first reversing valve, a second reversing valve, a sample temporary storage container, an injection pump, a mixing pool, a standard sample storage tank and a diluent storage tank. The first reversing valve is further connected with a liquid outlet of the third driving pump, a liquid inlet / outlet of the injection pump and a liquid inlet / outlet of the sample temporary storage container, and the second reversing valve is further connected with a liquid outlet of the diluent storage tank, a liquid inlet / outlet of the mixing tank, a liquid inlet / outlet of the standard sample storage tank and a liquid inlet of the ion chromatograph. The dilution ratio is automatically adjusted according to the concentration, so that the detection accuracy is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of intelligent measuring instruments and analyzers, in particular to an intelligent analyzer with a sample dilution function. Background Art

[0002] For the precise qualitative and quantitative detection and analysis of trace substances, chromatographic techniques are used for processing. Taking an ion chromatograph as an example, before the detection and analysis, the samples to be detected need to be pretreated (filtered, removing organic matter by water solution, etc.), and then diluted so that the concentration of the samples is within the measurement range of the ion chromatograph before the samples can be input into the ion chromatograph for analysis. In the laboratory, generally, the operator needs to initially judge the concentration of the unknown samples to be detected, and then manually dilute them and inject them into the ion chromatograph to analyze and observe the results. If the dilution factor is too large, no peak will appear or the peak area of the peak will be small, and accurate judgment and calculation cannot be carried out; if the dilution factor is too small, the chromatographic column will be overloaded and a flat peak will appear, and the data is also invalid. In view of this, how to design a technology that can automatically adjust the dilution factor according to the sample concentration and achieve full mixing of the sample and the diluent to improve the detection accuracy is the technical problem to be solved by the utility model. Summary of the Utility Model

[0003] The utility model provides an intelligent analyzer with a sample dilution function, which can automatically adjust the dilution factor according to the sample concentration and achieve full mixing of the sample and the diluent to improve the detection accuracy of the intelligent analyzer with a sample dilution function.

[0004] To achieve the above object, the utility model adopts the following technical solutions:

[0005] The utility model provides an intelligent analyzer with a sample dilution function, including:

[0006] An ion chromatograph, the ion chromatograph includes a separation column, a suppressor and a detector connected in sequence, an injection valve is arranged at the liquid inlet of the separation column, a first quantitative device, a second quantitative device and a peristaltic pump are further connected to the injection valve, the injection valve has at least ten valve ports, the first quantitative device, the second quantitative device and the peristaltic pump are connected to the corresponding valve ports of the injection valve, the liquid inlet of the peristaltic pump is connected to an eluent container, and the volume of the first quantitative device is smaller than the volume of the second quantitative device;

[0007] A concentration detection module, the concentration detection module includes a driving pump, a conductivity detector and a multi-way valve, the driving pump and the conductivity detector are respectively connected to the multi-way valve, and the liquid inlet of the driving pump is connected to a sample storage tank;

[0008] Concentration adjustment module, the concentration adjustment module includes a sample temporary storage container, an injection pump, a mixing tank, a standard sample storage tank, a diluent storage tank and a reversing valve, the sample temporary storage container, the injection pump, the mixing tank, the standard sample storage tank and the diluent storage tank are respectively connected to the reversing valve;

[0009] Wherein, the multi-way valve, the reversing valve and the sampling valve are connected in sequence;

[0010] The multi-way valve is configured to switch the drive pump to selectively communicate with the conductivity detector or the reversing valve;

[0011] The reversing valve is configured to switch the injection pump to selectively communicate with the sample temporary storage container, the mixing tank, the standard sample storage tank, the diluent storage tank or the sampling valve; the reversing valve is configured to switch the sample temporary storage container to communicate with the multi-way valve;

[0012] The sampling valve is configured to switch the first quantitative device to selectively connect to the reversing valve or the peristaltic pump, and the sampling valve is configured to switch the second quantitative device to selectively connect to the reversing valve or the peristaltic pump.

[0013] Further, the drive pump includes a first drive pump and a second drive pump;

[0014] The concentration detection module further includes a quantitative loop, the quantitative loop, the liquid outlet of the first drive pump, the liquid outlet of the second drive pump, and the liquid inlet of the first conductivity detector are respectively connected to the multi-way valve, the liquid inlet of the first drive pump is connected to the sample storage tank, and the liquid inlet of the second drive pump is connected to the pure water storage tank.

[0015] Further, the multi-way valve is used to switch the quantitative loop to communicate with the first drive pump and the first conductivity detector respectively;

[0016] The multi-way valve is also used to switch the quantitative loop to communicate with the second drive pump and the mixer respectively.

[0017] Further, the reversing valve includes a first reversing valve and a second reversing valve connected together;

[0018] The multi-way valve, the liquid inlet and outlet of the injection pump and the liquid inlet and outlet of the sample temporary storage container are respectively connected to the first reversing valve, and the liquid outlet of the diluent storage tank, the liquid inlet and outlet of the mixing tank, the standard sample storage tank and the sampling valve are respectively connected to the second reversing valve.

[0019] Further, the first reversing valve is used to switch the sample temporary storage container to communicate with the multi-way valve, and is also used to switch the injection pump to communicate with the sample temporary storage container or the second reversing valve;

[0020] The second switching valve is used to switch the connection between the first switching valve and the mixing tank, the standard sample storage tank, the diluent storage tank or the sampling valve.

[0021] Furthermore, the second switching valve is connected to the sampling valve. The second switching valve is used to switch the connection between the first switching valve and the first quantitative device through the sampling valve, and the second switching valve is also used to switch the connection between the first switching valve and the second quantitative device through the sampling valve.

[0022] Furthermore, a PH detector is also connected to the liquid outlet of the first conductivity detector.

[0023] Furthermore, two concentration adjustment modules are further included;

[0024] The intelligent analyzer with sample dilution function further includes a third switching valve;

[0025] The liquid inlets of the sample temporary storage containers of the two concentration adjustment modules and the liquid outlet of the multi-way valve are respectively connected to the third switching valve.

[0026] Furthermore, the third switching valve is used to switch the connection between the multi-way valve and the liquid inlet of the sample temporary storage container of one of the concentration adjustment modules.

[0027] The technical solution of the present utility model has the following technical effects compared with the prior art: By using the first conductivity detector to detect whether the concentration of the sample needs to be diluted, and performing pre-dilution through the second driving pump. Since the volumes of the mixer and the quantitative loop are fixed, a certain amount of pure water is transported to the sample temporary storage container of the concentration adjustment module through the second driving pump. According to the information of the detected sample concentration, the dilution by a set multiple can be further performed through the concentration adjustment module, realizing automatic adjustment of the dilution multiple according to the sample concentration and fully mixing the sample with the diluent, so as to improve the detection accuracy of the intelligent analyzer with sample dilution function.

[0028] Meanwhile, by configuring two quantitative devices on the sampling valve, the detection requirements of low-concentration samples can be satisfied simultaneously by using the second quantitative device with a large volume, effectively broadening the applicable range of the intelligent chromatograph and making it more intelligent. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is one of the structural schematic diagrams of an embodiment of the intelligent analyzer with sample dilution function of the present utility model;

[0030] Figure 2 It is the structural principle of the concentration detection module in an embodiment of the intelligent analyzer with sample dilution function of the present utility model Figure 2 .

[0031] Reference numerals:

[0032] 100, concentration detection module;

[0033] 110, first driving pump; 120, second driving pump; 130, third driving pump; 140, quantitative loop; 150, multi - way valve; 160, first conductivity detector; 170, mixer; 180, pH detector;

[0034] 111, sample storage tank; 121, pure water storage tank; 131, second conductivity detector;

[0035] 200, concentration adjustment module;

[0036] 210, first reversing valve; 220, second reversing valve; 230, sample temporary storage container; 240, injection pump; 250, mixing pool; 260, standard sample storage tank; 270, diluent storage tank; 280, third reversing valve;

[0037] 300, ion chromatograph;

[0038] 310, injection valve; 320, first quantifier; 330, second quantifier; 340, peristaltic pump; 350, eluent container. Detailed implementation mode

[0039] Example 1, as Figure 1 shown, the present utility model provides an intelligent analyzer with a sample dilution function, including: a concentration detection module 100, a concentration adjustment module 200, and an ion chromatograph 300.

[0040] The ion chromatograph 300 includes a separation column (not shown), a suppressor (not shown), and a detector (not shown) connected in sequence. The separation column is also provided with an injection valve 310, a first quantifier 320, a second quantifier 330, and a peristaltic pump 340. The injection valve 310 has at least ten valve ports. The first quantifier 320, the second quantifier 330, and the peristaltic pump 340 are connected to the corresponding valve ports of the injection valve 310. The inlet of the peristaltic pump 340 is connected to an eluent container 350; the volume of the first quantifier 320 is smaller than the volume of the second quantifier 330;

[0041] The concentration detection module 200 includes a driving pump, a first conductivity detector 160, and a multi - way valve 150. The driving pump and the first conductivity detector 160 are respectively connected to the multi - way valve 150. The inlet of the driving pump is connected to a sample storage tank 111;

[0042] The concentration adjustment module 300 includes a sample temporary storage container 230, an injection pump 240, a mixing tank 250, a standard sample storage tank 260, a diluent storage tank 270, and a reversing valve. The sample temporary storage container 230, the injection pump 249, the mixing tank 259, the standard sample storage tank 260, and the diluent storage tank 270 are respectively connected to the reversing valve;

[0043] Among them, the multi-way valve 150, the reversing valve, and the sampling valve 310 are connected in sequence;

[0044] The multi-way valve 150 is configured to switch the driving pump to selectively communicate with the first conductivity detector 160 or the reversing valve;

[0045] The reversing valve is configured to switch the injection pump 240 to selectively communicate with the sample temporary storage container 230, the mixing tank 250, the standard sample storage tank 260, the diluent storage tank 270, or the sampling valve 310; the reversing valve is configured to switch the sample temporary storage container 230 to communicate with the multi-way valve 150;

[0046] The sampling valve 310 is configured to switch the first quantitative device 320 to selectively connect to the reversing valve or the peristaltic pump 340, and the sampling valve 310 is configured to switch the second quantitative device 330 to selectively connect to the reversing valve or the peristaltic pump 340.

[0047] Specifically, during the actual detection process, since the concentration of the sample solution in the sample storage tank 111 is not a known concentration, it is also impossible to determine whether dilution is required. For this reason, for the sample in the sample storage tank 111, the sample is first transported to the quantitative loop 140 by the first driving pump 110 for quantitative sampling, and the excessive sample will flow through the first conductivity detector 160 to detect the concentration of the sample by using the first conductivity detector 160 (for the specific detection method, reference can be made to the record of Chinese Patent Publication No. CN 108267356 A, which will not be limited and elaborated here). According to the detected concentration, the dilution multiple required for the sample can be obtained. Then, the multi-way valve 150 is switched so that the second driving pump 120 sucks pure water from the pure water storage tank 121 and transports it to the quantitative loop 140 to transport the sample in the positioning loop to the concentration adjustment module 200 for dilution.

[0048] For the concentration adjustment module 200, it can dilute the sample according to the dilution multiple required for the concentration of the sample detected by the concentration detection module 100.

[0049] Specifically, for the solution delivered by the concentration detection module 100 to the sample temporary storage container, dilution treatment will be carried out through the concentration adjustment module 200. When the switching valve switches the injection pump 240 to be respectively connected with the sample temporary storage container 230 and the diluent storage tank 270, a certain amount of pure water is inhaled from the diluent storage tank 270 through the injection pump 240 to mix and dilute the sample inhaled into the injection pump 240 to meet the requirements of the final dilution multiple of the sample. The diluted sample will enter the first quantifier 320 through the sampling valve 310 for quantitative sampling. Then, the sampling valve 310 switches the peristaltic pump to communicate with the first quantifier 320 and aspirates the eluent to transport the sample in the first quantifier 320 into the ion chromatograph 300 for detection.

[0050] In addition, during the actual use process, in order to calculate the content of unknown samples, standard substances are usually used for calculation. By measuring a series of standard solutions of a certain substance, the peak areas of each solution can be obtained. With the concentration as the abscissa and the peak area as the ordinate, a standard curve can be obtained. Therefore, when detecting samples with unknown concentrations, the process of obtaining the standard curve through the standard sample storage tank 260 can refer to the specific operation process of conventional ion chromatography analysis, which will not be elaborated and restricted here.

[0051] The concentration of the sample is detected by the first conductivity detector to determine whether dilution treatment is required, and pre-dilution is carried out through the second drive pump. Since the volumes of the mixer and the quantitative loop are fixed, a quantitative amount of pure water is transported to the sample temporary storage container of the concentration adjustment module through the second drive pump. According to the information on the detected concentration of the sample, dilution with a set multiple can be carried out again through the concentration adjustment module, realizing automatic adjustment of the dilution multiple according to the sample concentration and ensuring full mixing of the sample and the diluent, so as to improve the detection accuracy of the intelligent analyzer with the function of sample dilution.

[0052] Similarly, for samples with too low concentrations, no dilution treatment is required, and there may also be situations where the ion chromatograph 300 cannot detect samples with low concentrations. Therefore, when the first conductivity detector 160 detects that the concentration is lower than the detection range of the ion chromatograph 300, no dilution treatment is required for the samples entering the sample temporary storage container.

[0053] The sample in the sample temporary storage container 230 is directly extracted by the injection pump 240 and then transported to the sampling valve and flows into the second quantifier 330.

[0054] For the situation where the concentration of the sample is too low and also exceeds the sample concentration detection range, and since the sample with low concentration cannot be concentrated, in order to meet the detection requirements of samples with too low concentrations, a second quantifier 330 with a larger capacity (such as a longer concentration column, etc.) can be configured on the sampling valve 310.

[0055] In this way, when the concentration of the sample is lower than the detection range of the set concentration, the injection valve 310 switches to the second quantifier 330 to participate in the work, so as to obtain a sufficient amount of the sample through the second quantifier 330. Since the total amount of the sample is large, when a large amount of the sample is transported from the injection valve 310 to the ion chromatography analysis under the action of the peristaltic pump 340, although the concentration of the sample is low, the total amount of the substance to be detected in the sufficient amount of the sample meets the detection requirements, and thus the detection requirements for the too low concentration of the sample can be satisfied, more effectively broadening the applicable range of the intelligent chromatograph and having a higher degree of intelligence.

[0056] In an embodiment of the present application, the driving pump includes a first driving pump 110 and a second driving pump 120. The concentration detection module 100 further includes a third driving pump 130 and a mixer 170. The sample loop 140, the liquid outlet of the first driving pump 110, the liquid outlet of the second driving pump 120, the liquid inlet of the first conductivity detector 160, and the liquid inlet of the mixer 170 are respectively connected to the multi-way valve 150. The liquid inlet of the first driving pump 110 is connected to the sample storage tank 111, the liquid inlet of the second driving pump 120 is connected to the pure water storage tank 121, and the liquid outlet of the mixer 170 is connected to the liquid inlet of the third driving pump 130;

[0057] The reversing valve includes a first reversing valve 210 and a second reversing valve 220. The first reversing valve 210 is connected to the second reversing valve 220. The first reversing valve 210 is further connected to the liquid outlet of the third driving pump 130, the liquid inlet and outlet of the injection pump 240, and the liquid inlet and outlet of the sample temporary storage container 230. The second reversing valve 220 is further connected to the liquid outlet of the diluent storage tank 270, the liquid inlet and outlet of the mixing pool 250, the standard sample storage tank 260, and the liquid inlet of the ion chromatograph 300.

[0058] Specifically, when it is detected by the concentration detection module that the concentration of the sample is too high, the mixer 170 and the third driving pump 130 connected between the multi-way valve 150 and the first reversing valve 210 cooperate, and the mixer 170 can first pre-dilute the sample. Since the volume in the mixer 170 is certain, the multiple of the pre-diluted sample is also certain. The pure water and the sample are mixed in the mixer 170 to form a pre-mixed solution, and the pre-mixed solution is transported to the sample temporary storage container 230 of the concentration adjustment module 200 through the third driving pump 130.

[0059] When the first switching valve 210 switches the injection pump 240 and the sample temporary storage container 230, a certain amount of premixed liquid is inhaled from the sample temporary storage container 230 through the injection pump 240. Then, the first switching valve 210 switches the injection pump 240 to be connected to the second switching valve 220, and the second switching valve 220 communicates with the diluent storage tank 270, so as to inhale a certain amount of pure water from the diluent storage tank 270 through the injection pump 240; the ratio of the premixed liquid and the pure water in the injection pump 240 exactly meets the requirements of the final dilution multiple of the sample.

[0060] The state in which the first switching valve 210 switches the injection pump 240 to be connected to the second switching valve 220 remains unchanged, and the second switching valve 220 switches to communicate with the mixing tank 250, so that the injection pump 240 and the mixing tank 250 communicate with each other. The injection pump 240 will reciprocate to enable the premixed liquid and the pure water to be fully mixed evenly to form a sample detection liquid. After the sample detection liquid is mixed evenly, the second switching valve 220 switches the injection pump 240 to be connected to the ion chromatograph 300, so that the sample detection liquid is input into the ion chromatograph 300 for detection.

[0061] Among them, for the multi-way valve 150, it has two states during the working process, that is, the multi-way valve 150 is used to switch the quantitative loop 140 to communicate with the first driving pump 110 and the first conductivity detector 160 respectively; the multi-way valve 150 is also used to switch the quantitative loop 140 to communicate with the second driving pump 120 and the mixer 170 respectively.

[0062] In addition, for the first switching valve 210, the first switching valve is used to switch the sample temporary storage container to communicate with the third driving pump, and is also used to switch the injection pump to communicate with the sample temporary storage container or the second switching valve. And the second switching valve is used to switch the first switching valve to communicate with the mixing tank, the standard sample storage tank, the diluent storage tank or the ion chromatograph.

[0063] The second switching valve 220 is connected to the injection valve 310. The second switching valve 220 has two independent valve ports connected to the corresponding two valve ports of the injection valve 310. The second switching valve is used to switch the first switching valve to connect to the first quantifier through the injection valve, and the second switching valve is also used to switch the first switching valve to connect to the second quantifier through the injection valve.

[0064] Specifically, for the premixed liquid that has been detected by the concentration detection module 100 and pre-diluted and is transported to the concentration adjustment module 200, if the concentration meets the detection range of the ion chromatograph 300, there is no need for additional dilution, and the injection pump 240 can sequentially transport the premixed liquid to the first quantifier 320 through the first switching valve 210, the second switching valve 220, and the injection valve 310.

[0065] Similarly, for the sample detection solution diluted by the concentration adjustment module 200 to a reasonable detection range, the injection pump 240 can sequentially deliver the sample detection solution to the first quantifier 320 through the first switching valve 210, the second reversing valve 220, and the sampling valve 310.

[0066] For the sample with a high concentration, after dilution treatment, the diluted sample flows into the first quantifier 320. The sampling valve 310 switches to connect the flat flow pump 340 with the first quantifier 320, and the eluent is used to deliver the sample detection solution in the first quantifier 320 to the ion chromatograph 300 for analysis.

[0067] For the sample with a low concentration, after pre-dilution by the concentration detection module 100, when the concentration of the pre-mixture is already lower than the minimum detection concentration value of the ion chromatograph 300, the injection pump 240 can sequentially deliver the sample detection solution to the second quantifier 330 through the first switching valve 210, the second reversing valve 220, and the sampling valve 310.

[0068] Among them, the first quantifier 320 and the second quantifier 330 can also be used for quantitative sampling with quantitative loops of different lengths.

[0069] The second reversing valve 220 is connected to the sampling valve 310. The second reversing valve 220 has two independent valve ports connected to the corresponding two valve ports of the sampling valve 310. The second reversing valve is used to switch the first reversing valve to connect the first quantifier through the sampling valve, and the second reversing valve is also used to switch the first reversing valve to connect the second quantifier through the sampling valve.

[0070] Specifically, for the pre-mixture detected and pre-diluted by the concentration detection module 100 and delivered to the concentration adjustment module 200, if the concentration meets the detection range of the ion chromatograph 300, no additional dilution is required, and the injection pump 240 can sequentially deliver the pre-mixture to the first quantifier 320 through the first switching valve 210, the second reversing valve 220, and the sampling valve 310.

[0071] Similarly, for the sample detection solution diluted by the concentration adjustment module 200 to a reasonable detection range, the injection pump 240 can sequentially deliver the sample detection solution to the first quantifier 320 through the first switching valve 210, the second reversing valve 220, and the sampling valve 310.

[0072] For the sample with a high concentration, after dilution treatment, the diluted sample flows into the first quantifier 320. The sampling valve 310 switches to connect the flat flow pump 340 with the first quantifier 320, and the eluent is used to deliver the sample detection solution in the first quantifier 320 to the ion chromatograph 300 for analysis.

[0073] When the concentration of the sample is relatively low and, after pre-dilution by the concentration detection module 100, the concentration of the pre-mixture has dropped below the minimum detection concentration value of the ion chromatograph 300, the injection pump 240 can sequentially deliver the sample detection solution to the second quantifier 330 through the first switching valve 210, the second reversing valve 220, and the injection valve 310.

[0074] Further, a second conductivity detector 131 is also provided between the liquid inlet of the third driving pump 130 and the liquid outlet of the mixer 170.

[0075] Specifically, the second conductivity detector 131 can further detect the concentration of the pre-mixture, thereby confirming whether the pre-dilution of the concentration detection module 100 has reached the set pre-dilution multiple. At the same time, the concentration adjustment module 200 will finally determine the final dilution multiple based on the concentration of the pre-mixture detected by the second conductivity detector 131.

[0076] In this way, it is possible to avoid the problem of inaccurate pre-dilution caused by the too low amount of pure water delivered by the second driving pump 120 resulting in the pre-dilution not reaching the set pre-dilution multiple, which is more conducive to the precise dilution of the sample.

[0077] Preferably, the liquid outlet of the first conductivity detector 160 is also connected to a PH detector 180.

[0078] Furthermore, as Figure 2 shown, the intelligent analyzer with sample dilution function includes two of the secondary dilution modules 200. The on-line desulfurized wastewater intelligent analyzer further includes a third reversing valve 280; the liquid inlets of the sample storage containers 230 of the two secondary dilution modules 200 and the liquid outlet of the third peristaltic pump 130 are respectively connected to the third reversing valve 280.

[0079] Specifically, in order to reduce the equipment investment cost, in the case of simultaneously meeting the detection requirements of cations and anions, two concentration adjustment modules 200 are configured, where one concentration adjustment module 200 is used for the dilution of cation samples, and the other concentration adjustment module 200 is used for the dilution of anion samples. A Na-type pretreatment column 201 is also provided at the inlet of the sample storage container 230 of the concentration adjustment module 200 for diluting anion samples. Each concentration adjustment module 200 is connected to a corresponding ion chromatograph 300.

[0080] Among them, the liquid outlet of the third driving pump 130 is switched to communicate with the liquid inlet of the sample storage container 230 of one of the concentration adjustment modules 200.

[0081] Embodiment 2, based on the above Embodiment 1, the present application also provides a control method for the above intelligent analyzer with sample dilution function, including:

[0082] Step 1: The first driving pump 110 sequentially transports the sample in the sample storage tank 111 to the quantitative loop 140 and the first conductivity detector 160, and the concentration of the sample is detected by the first conductivity detector 160.

[0083] Step 2: The second driving pump 120 transports the pure water in the pure water storage tank 121 to the quantitative loop 140 and transports the sample in the positioning loop to the mixer 170 together for pre-dilution by a set multiple to form a pre-mixed solution.

[0084] Step 3: The third driving pump 130 transports the pre-mixed solution in the mixer 170 to the sample temporary storage container 230.

[0085] Step 4: According to the concentration of the sample detected by the first conductivity detector 160, the injection pump 240 sucks a certain amount of pure water from the diluent storage tank 270, and then extracts a certain amount of the pre-mixed solution from the sample temporary storage container 230. The injection pump 240 reciprocates to push and pull so that the mixed solution and the pure water flow reciprocally between the mixing pool 250 and the injection pump 240 for mixing to form a sample detection solution.

[0086] Step 5: The injection pump 240 transports the well-mixed sample detection solution to the ion chromatograph 300.

[0087] Furthermore, a second conductivity detector 131 is also provided between the liquid inlet of the third driving pump 130 and the liquid outlet of the mixer 170.

[0088] The specific content of Step 3 is that during the process of the third driving pump 130 transporting the pre-mixed solution in the mixer 170 to the sample temporary storage container 230, the concentration of the pre-mixed solution is detected by the first conductivity detector 160.

[0089] The specific content of Step 4 is that according to the concentration of the pre-mixed solution detected by the second conductivity detector 131, the injection pump 240 sucks a certain amount of pure water from the diluent storage tank 270, and then extracts a certain amount of the pre-mixed solution from the sample temporary storage container 230. The injection pump 240 reciprocates to push and pull so that the mixed solution and the pure water flow reciprocally between the mixing pool 250 and the injection pump 240 for mixing to form a sample detection solution.

[0090] The technical solution of the present utility model has the following technical effects compared with the prior art: The first conductivity detector is used to detect whether the concentration of the sample needs to be diluted, and the second driving pump is used for pre-dilution. Since the volumes of the mixer and the quantitative loop are fixed, the second driving pump transports a certain amount of pure water to the mixer, so that the pure water transports the sample in the quantitative loop to the mixer for quantitative pre-dilution together; the third driving pump can transport the pre-mixed liquid to the sample storage container of the concentration adjustment module. According to the information of the detected concentration of the sample, dilution by a set multiple can be carried out again through the concentration adjustment module, realizing automatic adjustment of the dilution multiple according to the sample concentration and full mixing of the sample and the diluent, so as to improve the detection accuracy of the intelligent analyzer with the function of sample dilution.

[0091] The above is only the specific implementation manner of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present utility model should be covered by the protection scope of the present utility model. Therefore, the protection scope of the present utility model should be subject to the protection scope of the claims.

Claims

1. An intelligent analyzer with a sample dilution function, characterized in that, Comprising: An ion chromatograph, which includes a separation column, a suppressor, and a detector connected in sequence. An injection valve is provided at the liquid inlet of the separation column. A first quantitative device, a second quantitative device, and a peristaltic pump are also connected to the injection valve. The injection valve has at least ten valve ports. The first quantitative device, the second quantitative device, and the peristaltic pump are connected to the corresponding valve ports of the injection valve. The liquid inlet of the peristaltic pump is connected to an eluent container. The volume of the first quantitative device is smaller than the volume of the second quantitative device; A concentration detection module, which includes a driving pump, a first conductivity detector, and a multi-way valve. The driving pump and the conductivity detector are respectively connected to the multi-way valve. The liquid inlet of the driving pump is connected to a sample storage tank; A concentration adjustment module, which includes a sample temporary storage container, an injection pump, a mixing tank, a diluent storage tank, and a reversing valve. The sample temporary storage container, the injection pump, the mixing tank, a standard sample storage tank, and the diluent storage tank are respectively connected to the reversing valve; Wherein, the multi-way valve, the reversing valve, and the injection valve are connected in sequence; The multi-way valve is configured to switch the driving pump to selectively communicate with the first conductivity detector or the reversing valve; The reversing valve is configured to switch the injection pump to selectively communicate with the sample temporary storage container, the mixing tank, the diluent storage tank, or the injection valve; The reversing valve is configured to switch the sample temporary storage container to communicate with the multi-way valve; The injection valve is configured to switch the first quantitative device to selectively connect to the reversing valve or the peristaltic pump, and the injection valve is configured to switch the second quantitative device to selectively connect to the reversing valve or the peristaltic pump.

2. The intelligent analyzer with sample dilution function according to claim 1, characterized in that, The driving pump includes a first driving pump and a second driving pump; The concentration detection module further includes a sampling loop. The sampling loop, the liquid outlet of the first driving pump, the liquid outlet of the second driving pump, and the liquid inlet of the first conductivity detector are respectively connected to the multi-way valve. The liquid inlet of the first driving pump is connected to the sample storage tank. The liquid inlet of the second driving pump is connected to a pure water storage tank.

3. The intelligent analyzer with sample dilution function according to claim 2, characterized in that, The multi-way valve is used to switch the sampling loop to communicate with the first driving pump and the first conductivity detector respectively; The multi-way valve is also used to switch the sampling loop to communicate with the second driving pump and a mixer respectively.

4. The intelligent analyzer with sample dilution function according to claim 1, characterized in that, The reversing valve includes a first reversing valve and a second reversing valve connected together; The multi-way valve, the inlet and outlet of the injection pump, and the inlet and outlet of the sample temporary storage container are respectively connected to the first reversing valve. The liquid outlet of the diluent storage tank, the inlet and outlet of the mixing tank, the standard sample storage tank, and the injection valve are respectively connected to the second reversing valve.

5. The intelligent analyzer with a sample dilution function according to claim 4, characterized in that, The first reversing valve is used to switch the sample temporary storage container to communicate with the multi-way valve, and is also used to switch the injection pump to communicate with the sample temporary storage container or the second reversing valve; The second reversing valve is used to switch the first reversing valve to communicate with the mixing tank, the diluent storage tank, or the injection valve.

6. The intelligent analyzer with sample dilution function according to claim 5, characterized in that, The second switching valve is connected to the sampling valve. The second switching valve is used to switch the first switching valve to be connected to the first metering device through the sampling valve, and the second switching valve is further used to switch the first switching valve to be connected to the second metering device through the sampling valve.

7. The intelligent analyzer with sample dilution function according to claim 1, characterized in that, The liquid outlet of the first conductivity detector is further connected to a pH detector.

8. The intelligent analyzer with sample dilution function according to any one of claims 1-7, characterized in that, It further includes two of the concentration adjustment modules; The intelligent analyzer with the function of sample dilution further includes a third switching valve; The liquid inlets of the sample temporary storage containers of the two concentration adjustment modules and the liquid outlet of the multi-way valve are respectively connected to the third switching valve.

9. The intelligent analyzer with sample dilution function according to claim 8, characterized in that, The third switching valve is used to switch the multi-way valve to communicate with the liquid inlet of the sample temporary storage container of one of the concentration adjustment modules.

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