Fully automatic urine iodine and water iodine analyzer and analysis method

Abstract

The present invention discloses a fully automatic urine iodine and water iodine analyzer and an analysis method, wherein the fully automatic urine iodine and water iodine analyzer comprises an analyzer body, the analyzer body comprises a workbench and a three-dimensional motion platform arranged on the workbench, a graphite digestion device, a water bath container, a sample rack, a stirrer, a cleaning device and a detection device. The fully automatic urine iodine and water iodine analyzer of the present invention can realize fully automatic digestion of samples, fully automatic reagent addition, and rapid fully automatic detection, which not only has a high degree of automation, but also has high work efficiency, and meets the needs of customers for rapid analysis.

Description

Technical Field

[0001] The invention relates to a detection device, in particular to a full-automatic urine iodine and water iodine analyzer and an analysis method. Background Art

[0002] The analysis of urine iodine and water iodine generally adopts catalytic spectrophotometry. During the analysis process, the sample needs to be digested and the detection time requirement is relatively high.

[0003] Currently, the fully automatic instruments for analyzing urine iodine and water iodine on the market, such as a fully automatic intelligent urine iodine analyzer and its working method disclosed in CN108152285A, can detect urine iodine and water iodine, but cannot achieve fully automatic digestion of samples. The digestion process still requires manual analysis methods to complete, and digestion is the key to the success of the experiment. Therefore, an iodine analyzer with a fully automatic digestion function is urgently needed in the market. Summary of the invention

[0004] The present invention aims to provide a fully automatic urine iodine and water iodine analyzer and an analysis method, which can realize automatic addition of reagents, automatic stirring and automatic detection, and can realize automatic digestion, automatic heat preservation and automatic detection of samples.

[0005] The present invention solves the technical problem by adopting the following technical solution: a fully automatic urine iodine and water iodine analyzer, which includes an analyzer body, the analyzer body includes a workbench and a three-dimensional motion platform arranged on the workbench, a graphite digestion device, a water bath container, a sample rack, a stirrer, a cleaning device and a detection device;

[0006] A manipulator is installed on the Z axis of the three-dimensional motion platform, and the manipulator is used to grab the sample tube; an injection needle and three injection capillaries are arranged on the manipulator;

[0007] The graphite digestion device is provided with a plurality of blind holes for accommodating samples; the water bath container is located on the right side of the graphite digestion device; at least one sample rack is placed in the water bath container;

[0008] The stirrer is used to stir the sample in the sample tube; the stirrer is arranged behind the water bath container and on the right side of the graphite digestion device;

[0009] The cleaning device is arranged on the workbench, and is located behind the water bath container and on the right side of the agitator, and is used for cleaning the injection needle; the detection device is arranged on the workbench, and is located behind the water bath container and on the right side of the cleaning device.

[0010] Optionally, the graphite digestion device is a graphite digestion block coated with Teflon.

[0011] Optionally, the length direction of the graphite digestion device is the width direction of the workbench, and the length direction of the water bath container is parallel to the length direction of the workbench.

[0012] Optionally, the sample rack is a first sample rack and a second sample rack.

[0013] Optionally, the fully automatic urine iodine and water iodine analyzer further includes a hot water circulation device, and the hot water circulation device is connected to the water bath container.

[0014] Optionally, the agitator is a vortex mixing oscillator, which includes an oscillator and an auxiliary device, wherein the auxiliary device is fixed on the workbench and located above the oscillator, and a through hole is opened on the auxiliary device, in which a soft material is arranged, and the soft material is cylindrical, and its inner diameter is larger than the outer diameter of the sample tube.

[0015] Optionally, the detection device includes a light source, a spectroscopic system, a circulation colorimetric cell and a detector, the light source is a halogen lamp or an LED; the spectroscopic system is a grating or a filter; the light emitted by the light source is irradiated to the circulation colorimetric cell through the spectroscopic system, and the detector detects the light passing through the circulation colorimetric cell to obtain the iodine content.

[0016] The present invention also adopts the following technical solution to solve the technical problem: a urine iodine analysis method, which comprises:

[0017] S10, adding a proper amount of distilled water to the hot water circulation device and the water bath container, and allowing the hot water circulation device to add or extract a proper amount of water to the water bath container through the circulation pipeline; the water temperature in the water bath container and the hot water circulation device is consistent;

[0018] S15, taking out the first sample rack and the second sample rack, placing sample tubes containing 0.25 ml of urine sample on the sample racks in sequence; and then placing the sample racks in a water bath container;

[0019] S20, adding 1 mL of ammonium persulfate solution to the sample tubes of the first sample rack in turn, sending them into the stirrer to mix well, and then putting them back to the corresponding positions;

[0020] S25, sequentially placing the samples in the first sample rack into the graphite digestion block to digest the samples, and timing for 60 minutes;

[0021] S30, while the samples in the first sample rack are being digested, 1 mL of ammonium persulfate solution is added to the sample tubes in the second sample rack in sequence using a manipulator, and the sample tubes are sent into a stirrer for mixing, and then returned to the corresponding positions in the second sample rack;

[0022] S35, after the first sample of the first sample rack has completed the digestion for 60 minutes, the digested samples are taken out and put back to the corresponding positions of the first sample rack in turn; at the same time, the hot water circulation device is started, so that the water in the water bath container exchanges with the water in the hot water circulation device, and the sample in the sample tube is cooled to the set water bath temperature as soon as possible;

[0023] S40, using a manipulator to add 2.5 mL of arsenite solution to the sample tubes in the first sample rack in turn, send them into the stirrer to mix well, and then put them back to the corresponding position of the first sample rack, and start timing for 15 minutes at the same time;

[0024] S45, after the first sample of the first sample rack has been left to stand for 15 minutes, 0.3 mL of ammonium cerium sulfate solution is added to the sample tubes of the first sample rack in turn by a manipulator every 30 seconds, and the tubes are sent into the stirrer for mixing, and then returned to the corresponding positions of the first sample rack, and a timer of 30 minutes is started at the same time;

[0025] S50, while the samples in the first sample rack are waiting for 30 minutes, the samples in the second sample rack are sequentially placed into the graphite digestion block by a manipulator to digest the samples, and the time is 60 minutes;

[0026] S55, after the first sample of the first sample rack is left to stand for 30 minutes, every 30 seconds, the entire sample in the sample tube is drawn with a sampling needle and injected into the flow colorimetric cell for photometric measurement. After the measurement, the inner and outer walls of the flow cell and the sampling needle are cleaned and the next measurement is prepared;

[0027] S60, after the samples in the first sample rack are measured, the samples in the second sample rack are processed and measured according to steps S35, S40, S45, S50 and S55.

[0028] The present invention also adopts the following technical solution to solve the technical problem: a water iodine analysis method, which comprises:

[0029] S10, adding a proper amount of distilled water to the hot water circulation device and the water bath container, and allowing the hot water circulation device to add or extract a proper amount of water to the water bath container through the circulation pipeline; the water temperature in the water bath container and the hot water circulation device is consistent;

[0030] S15, taking out the first sample rack and the second sample rack, placing sample tubes containing 10 ml of water sample on the sample racks in sequence; and then placing the sample racks in a water bath container;

[0031] S20, using a manipulator to sequentially add 1 mL of sodium chloride solution, 0.5 mL of arsenite solution, and 1.0 mL of sulfuric acid solution to the sample tube in the first sample rack, send the mixture into a stirrer, mix well, and then put the mixture back to the corresponding position in the first sample rack;

[0032] S25, every 30 seconds, add 0.5 mL of ammonium cerium sulfate solution to the sample tubes in the first sample rack in turn using a manipulator, send them into the stirrer for mixing, and then put them back to the corresponding position of the first sample rack, and start timing for 20 minutes at the same time;

[0033] S30, while the samples in the first sample rack are waiting for 30 minutes, 1 mL of sodium chloride solution, 0.5 mL of arsenite solution, and 1.0 mL of sulfuric acid solution are added to the sample tubes in the second sample rack in sequence by a manipulator, and the mixture is sent to a stirrer for mixing, and then the mixture is returned to the corresponding position in the second sample rack;

[0034] S35, after the first sample in the first sample rack has been standing for 20 minutes, 1.0 mL of ammonium ferrous sulfate solution is added to the sample tube every 30 seconds, and the sample tube is mixed in a stirrer and then put back to the corresponding position of the first sample rack and start timing for 20 minutes;

[0035] S40, after the first sample in the first sample rack has been standing for 20 minutes, 1.0 mL of potassium thiocyanate solution is added to the sample tube every 30 seconds, and the sample tube is mixed in a stirrer and then returned to the first sample rack, and a timer of 45 minutes is started;

[0036] S45, after the first sample in the first sample rack is finished and left to stand for 45 minutes, all the samples in the sample tube are sucked out by the injection needle and injected into the circulation colorimetric cell for photometric measurement. After the measurement, the inner and outer walls of the circulation cell and the injection needle are cleaned and the next measurement is prepared;

[0037] S50, after the samples in the first sample rack are measured, the samples in the second sample rack are processed and measured according to steps S30, S35, S40, and S45.

[0038] The present invention has the following beneficial effects: the fully automatic urine iodine and water iodine analyzer of the present invention can realize fully automatic digestion of samples, fully automatic addition of reagents, and rapid fully automatic detection, which not only has a high degree of automation but also has high work efficiency, thus meeting the needs of customers for rapid analysis. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a structural schematic diagram of the fully automatic urine iodine and water iodine analyzer of the present invention;

[0040] Figure 2 It is a schematic diagram of the structure of the vortex mixing oscillator of the present invention;

[0041] The markings in the figure are as follows: 0-sample tube; 1-graphite digestion device; 2-water bath container; 3-sample rack; 3a-first sample rack; 3b-second sample rack; 4-vortex mixing oscillator; 41-oscillator; 42-auxiliary device; 43-soft material; 44-light-emitting component; 45-receiving component; 5-cleaning device; 6-detection device; 7-three-dimensional motion platform; 71-manipulator; 8-hot water circulation device. DETAILED DESCRIPTION

[0042] The technical solution of the present invention is further described below in conjunction with the embodiments and drawings.

[0043] Example 1

[0044] The present embodiment provides a fully automatic urine iodine and water iodine analyzer, which can realize automatic addition of reagents, automatic stirring and automatic detection, and can realize automatic digestion, automatic heat preservation and automatic detection of samples; the fully automatic urine iodine and water iodine analyzer includes an analyzer body, which includes a workbench and a three-dimensional motion platform arranged on the workbench, a graphite digestion device, a water bath container, a sample rack, a vortex mixing oscillator, a cleaning device and a detection device.

[0045] The three-dimensional motion platform can realize three-dimensional translation of the X-axis, the Y-axis and the Z-axis, and a manipulator is installed on the Z-axis of the three-dimensional motion platform, and the manipulator is used to grab the sample tube.

[0046] In this embodiment, three injection capillaries are arranged on the manipulator to add ammonium sulfate solution, arsenite solution and ammonium cerium sulfate solution into the sample tube through the three injection capillaries; and an injection needle can also be arranged on the manipulator to absorb the sample in the sample tube through the injection needle and inject the sample into the detection device.

[0047] In this embodiment, when the ammonium sulfate solution, the arsenous acid solution and the ammonium cerium sulfate are introduced through the capillary, a peristaltic pump or a syringe pump or any other pump that can be used for this application can be used.

[0048] In this embodiment, the three-dimensional motion platform and the manipulator can be implemented using structures in the prior art, and this embodiment will not describe this structure in detail.

[0049] A graphite digestion device is provided on the workbench. The graphite digestion device is a graphite digestion block coated with Teflon. A plurality of blind holes for accommodating samples are provided on the graphite digestion block. At this time, the Teflon is coated on the surface of the graphite digestion block and the inner surface of the blind hole. When the sample is injected into the blind hole, the sample can be digested by the graphite digestion device, and the temperature difference between the holes in the graphite digestion device is less than or equal to 1°C.

[0050] The workbench is also provided with a water bath container. When in use, warm water can be flowing in the water bath container to keep the sample tube at a reasonable temperature through the water bath container. For example, the temperature can be kept constant between room temperature and 100°C, and the temperature control accuracy is ±0.3°C.

[0051] Preferably, the water bath container is located on the right side of the graphite digestion device. More preferably, the length direction of the graphite digestion device is the width direction of the workbench, and the length direction of the water bath container is parallel to the length direction of the workbench.

[0052] At least one sample rack is placed in the water bath container, such as the first sample rack and the second sample rack provided in this embodiment, and sample tubes can be placed on the first sample rack and the second sample rack, so that the sample tubes on the first sample rack and the second sample rack are kept at a reasonable temperature by the warm water in the water bath container.

[0053] More preferably, the analyzer body further comprises a hot water circulation device, which is connected to the water bath container so as to make the hot water in the water bath container flow through the hot water circulation device. In this embodiment, the hot water circulation device can be a circulation pump with a heating function, and the water inlet and the water outlet of the circulation pump are respectively connected to the water bath device.

[0054] The vortex mixing oscillator is arranged on the workbench, and includes an oscillator and an auxiliary device. The oscillator can generate vortex motion. The auxiliary device is fixed on the workbench and is located above the oscillator. A through hole is provided on the auxiliary device. A soft material is arranged in the through hole. The soft material can be a sponge, etc. The soft material is cylindrical, and its inner diameter is larger than the outer diameter of the sample tube. When in use, the manipulator inserts the sample tube into the soft material, and makes the bottom of the sample tube contact the oscillator, starts the oscillator, and stirs the sample in the sample tube through the oscillator. That is to say, in the present embodiment, the vortex mixing oscillator is a specific implementation form of the agitator, which can realize stirring without contacting the solution.

[0055] Preferably, a photoelectric sensor is provided on the auxiliary device, and a light emitting component and a receiving component of the photoelectric sensor are arranged on the auxiliary device for detecting whether a sample tube is inserted into the auxiliary device, and when the insertion of the sample tube is detected, the oscillator is started.

[0056] In this embodiment, the vortex mixing oscillator is arranged behind the water bath container and located on the right side of the graphite digestion device.

[0057] The cleaning device is arranged on the workbench, and is located behind the water bath container and on the right side of the vortex mixing oscillator, and is used for cleaning the injection needle; the detection device is also arranged on the workbench, and is located behind the water bath container and on the right side of the cleaning device.

[0058] The detection device includes a light source, a spectroscopic system, a circulation colorimetric cell and a detector. The light source is a halogen lamp or an LED, and the wavelength covers 380nm, 400nm and 510nm; the spectroscopic system is a grating or a filter; the circulation colorimetric cell is a cuvette or a circulation cell, and the optical path is 10-100mm; the detector is a silicon photodiode or a photomultiplier tube or a CCD detector.

[0059] The fully automatic urine iodine and water iodine analyzer also includes a computer workstation system, which is connected to the detection device and further connected to the detector of the detection device to send the urine iodine and water iodine content detected by the detection device to the computer workstation system. The computer workstation system is also connected to the photoelectric sensor and oscillator to control the start and stop of the oscillator through the detection signal of the photoelectric sensor; the computer workstation system is also connected to the three-dimensional mobile platform to control the movement of the three-dimensional mobile platform.

[0060] Therefore, the fully automatic urine iodine and water iodine analyzer of this embodiment can realize fully automatic digestion of samples, fully automatic addition of reagents, and rapid fully automatic detection. It not only has a high degree of automation, but also has high work efficiency, meeting the needs of customers for rapid analysis.

[0061] Example 2

[0062] This embodiment provides a method for analyzing urine iodine, which is implemented using the fully automatic urine iodine and water iodine analyzer described in Example 1, and includes:

[0063] S10, add an appropriate amount of distilled water, for example, 20 L, to the hot water circulation device and the water bath container, and allow the hot water circulation device to add or extract an appropriate amount of water, for example, 1 L, from the water bath container 2 through the circulation pipeline. The water temperature in the water bath container 2 and the hot water circulation device is consistent, and in this embodiment, the temperature is set to 30°C.

[0064] S15, take out the first sample rack 3a and the second sample rack 3b, and place sample tubes containing 0.25 ml of urine sample on the sample racks in sequence; then put the sample racks into the water bath container 2;

[0065] S20, add 1 mL of ammonium persulfate solution to the sample tubes of the first sample rack 3a in turn, send them into the vortex mixer 4 for mixing, and then put them back to the corresponding positions;

[0066] S25, sequentially placing the samples in the first sample rack 3a into the graphite digestion block 1 to digest the samples, and timing for 60 minutes (starting from the time the first sample is placed);

[0067] S30, while the samples in the first sample rack 3a are being digested, 1 mL of ammonium persulfate solution is added to the sample tubes in the second sample rack 3b in sequence by a manipulator, and the tubes are sent into a vortex mixer for mixing, and then returned to the corresponding positions in the second sample rack 3b;

[0068] S35. After the first sample of the first sample rack 3a has been digested for 60 minutes, the digested samples are taken out and put back into the corresponding positions of the first sample rack 3a in sequence; at the same time, the hot water circulation device is started so that the water in the water bath container 2 exchanges with the water in the hot water circulation device, and the samples in the sample tubes are cooled to the set water bath temperature as quickly as possible.

[0069] S40, using a manipulator to add 2.5 mL of arsenite solution to the sample tubes in the first sample rack 3a in turn, send them into a vortex mixer to mix well, and then put them back to the corresponding position of the first sample rack 3a, and start timing for 15 minutes (starting from the time the first sample is put in).

[0070] S45, after the first sample of the first sample rack 3a is left to stand for 15 minutes, 0.3 mL of ammonium cerium sulfate solution is added to the sample tubes of the first sample rack 3a in turn by a manipulator every 30 seconds, and the tubes are sent to a vortex mixer for mixing, and then returned to the corresponding position of the first sample rack 3a, and a timing of 30 minutes is started at the same time;

[0071] S50, while the samples in the first sample rack 3a are waiting for 30 minutes, the samples in the second sample rack 3b are sequentially placed into the graphite digestion block 1 by a manipulator to digest the samples, and the timing is 60 minutes (starting from the first sample);

[0072] S55, after the first sample of the first sample rack 3a is left to stand for 30 minutes, the entire sample (about 2.5 ml) in the sample tube is drawn by the injection needle and injected into the circulation colorimetric cell for photometric measurement every 30 seconds. After the measurement, the inner and outer walls of the circulation cell and the injection needle are cleaned and the next measurement is prepared (this step is required to be completed within 30 seconds, and the sample interval time is consistent);

[0073] S60, after the samples in the first sample rack 3a are measured, the samples in the second sample rack 3b are processed and measured according to steps S35, S40, S45, S50 and S55.

[0074] In this embodiment, the injection needle needs to be cleaned by a cleaning device before each use to prevent mutual contamination between samples.

[0075] Example 3

[0076] This embodiment provides a method for analyzing water iodine, which is implemented using the fully automatic urine iodine and water iodine analyzer described in Example 1, and includes:

[0077] S10, add an appropriate amount of distilled water, for example, 20 L, to the hot water circulation device and the water bath container, and allow the hot water circulation device to add or extract an appropriate amount of water, for example, 1 L, from the water bath container 2 through the circulation pipeline. The water temperature in the water bath container 2 and the hot water circulation device is consistent, and in this embodiment, the temperature is set to 30°C.

[0078] S15, take out the first sample rack 3a and the second sample rack 3b, and place sample tubes containing 10 ml of water sample on the sample racks in sequence; then put the sample racks into the water bath container 2;

[0079] S20, using a manipulator to sequentially add 1 mL of sodium chloride solution, 0.5 mL of arsenite solution, and 1.0 mL of sulfuric acid solution to the sample tube in the first sample rack 3a, send the sample tube into the vortex mixer 4, mix well, and then put it back to the corresponding position of the first sample rack 3a;

[0080] S25, every 30 seconds, add 0.5 mL of ammonium cerium sulfate solution to the sample tubes in the first sample rack 3a in turn using a manipulator, place them in a vortex mixer, mix them well, and then place them back to the corresponding position in the first sample rack 3a, and start timing for 20 minutes at the same time;

[0081] S30, while the samples in the first sample rack 3a are waiting for 30 minutes, 1 mL of sodium chloride solution, 0.5 mL of arsenite solution, and 1.0 mL of sulfuric acid solution are added to the sample tubes in the second sample rack 3b in sequence by a manipulator, and sent to the vortex mixer 4 for mixing, and then returned to the corresponding position of the second sample rack 3b.

[0082] S35, after the first sample in the first sample rack 3a has been standing for 20 minutes, 1.0 mL of ammonium ferrous sulfate solution is added to the sample tube every 30 seconds, and the sample tube is mixed in a vortex mixer and then put back to the corresponding position in the first sample rack 3a and the timing for 20 minutes is started.

[0083] S40, after the first sample in the first sample rack 3a has been standing for 20 minutes, 1.0 mL of potassium thiocyanate solution is added to the sample tube every 30 seconds, and the sample tube is mixed in a vortex mixer and then put back into the first sample rack 3a, and a timer of 45 minutes is started.

[0084] S45, after the first sample in the first sample rack 3a is finished and left to stand for 45 minutes, all the samples in the sample tube are sucked out by the injection needle and injected into the circulation colorimetric cell for photometric measurement. After the measurement, the inner and outer walls of the circulation cell and the injection needle are cleaned and the next measurement is prepared (this step is required to be completed within 30 seconds, and the sample interval time is consistent);

[0085] S50, after the samples in the first sample rack 3a are measured, the samples in the second sample rack 3b are processed and measured according to steps S30, S35, S40, and S45.

[0086] In this embodiment, the injection needle needs to be cleaned by a cleaning device before each use to prevent mutual contamination between samples.

[0087] The order of the above embodiments is only for the convenience of description and does not represent the advantages or disadvantages of the embodiments.

[0088] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A fully automatic urine iodine and water iodine analyzer, characterized in that: The analyzer comprises an analyzer body, which comprises a workbench and a three-dimensional motion platform arranged on the workbench, a graphite digestion device, a water bath container, a sample rack, a stirrer, a cleaning device and a detection device; A manipulator is installed on the Z axis of the three-dimensional motion platform, and the manipulator is used to grab the sample tube; an injection needle and three injection capillaries are arranged on the manipulator; The graphite digestion device is provided with a plurality of blind holes for accommodating samples; the water bath container is located on the right side of the graphite digestion device; at least one sample rack is placed in the water bath container; The stirrer is used to stir the sample in the sample tube; the stirrer is arranged behind the water bath container and on the right side of the graphite digestion device; The cleaning device is arranged on the workbench, and is located behind the water bath container and on the right side of the agitator, and is used for cleaning the injection needle; the detection device is arranged on the workbench, and is located behind the water bath container and on the right side of the cleaning device.

2. The fully automatic urine iodine and water iodine analyzer according to claim 1, characterized in that: The graphite digestion device is a graphite digestion block coated with Teflon.

3. The fully automatic urine iodine and water iodine analyzer according to claim 2, characterized in that: The length direction of the graphite digestion device is the width direction of the workbench, and the length direction of the water bath container is parallel to the length direction of the workbench.

4. The fully automatic urine iodine and water iodine analyzer according to claim 3, characterized in that: The sample racks are a first sample rack and a second sample rack.

5. The fully automatic urine iodine and water iodine analyzer according to claim 1, characterized in that: It also includes a hot water circulation device, which is connected to the water bath container.

6. The fully automatic urine iodine and water iodine analyzer according to claim 1, characterized in that: The agitator is a vortex mixing oscillator, which includes an oscillator and an auxiliary device. The auxiliary device is fixed on the workbench and located above the oscillator. A through hole is opened on the auxiliary device. A soft material is arranged in the through hole. The soft material is cylindrical and its inner diameter is larger than the outer diameter of the sample tube.

7. The fully automatic urine iodine and water iodine analyzer according to claim 1, characterized in that: The detection device includes a light source, a spectroscopic system, a circulation colorimetric cell and a detector. The light source is a halogen lamp or an LED; the spectroscopic system is a grating or a filter; the light emitted by the light source is irradiated to the circulation colorimetric cell through the spectroscopic system, and the detector detects the light passing through the circulation colorimetric cell to obtain the iodine content.

8. A method for analyzing urine iodine, characterized in that: The analysis is performed using the fully automatic urine iodine and water iodine analyzer according to any one of claims 1 to 7, The urine iodine analysis method comprises: S10, adding a proper amount of distilled water to the hot water circulation device and the water bath container, and allowing the hot water circulation device to add or extract a proper amount of water to the water bath container through the circulation pipeline; the water temperature in the water bath container and the hot water circulation device is consistent; S15, taking out the first sample rack and the second sample rack, placing sample tubes containing 0.25 ml of urine sample on the sample racks in sequence; and then placing the sample racks in a water bath container; S20, adding 1 mL of ammonium persulfate solution to the sample tubes of the first sample rack in turn, sending them into the stirrer to mix well, and then putting them back to the corresponding positions; S25, sequentially placing the samples in the first sample rack into the graphite digestion block to digest the samples, and timing for 60 minutes; S30, while the samples in the first sample rack are being digested, 1 mL of ammonium persulfate solution is added to the sample tubes in the second sample rack in sequence using a manipulator, and the sample tubes are sent into a stirrer for mixing, and then returned to the corresponding positions in the second sample rack; S35, after the first sample of the first sample rack has completed the digestion for 60 minutes, the digested samples are taken out and put back to the corresponding positions of the first sample rack in turn; at the same time, the hot water circulation device is started so that the water in the water bath container exchanges with the water in the hot water circulation device, and the sample in the sample tube is cooled to the set water bath temperature as soon as possible; S40, using a manipulator to add 2.5 mL of arsenite solution to the sample tubes in the first sample rack in turn, send them into the stirrer to mix well, and then put them back to the corresponding position of the first sample rack, and start timing for 15 minutes at the same time; S45, after the first sample of the first sample rack has been left to stand for 15 minutes, 0.3 mL of ammonium cerium sulfate solution is added to the sample tubes of the first sample rack in turn by a manipulator every 30 seconds, and the tubes are sent into the stirrer for mixing, and then returned to the corresponding positions of the first sample rack, and a timer of 30 minutes is started at the same time; S50, while the samples in the first sample rack are waiting for 30 minutes, the samples in the second sample rack are sequentially placed into the graphite digestion block by a manipulator to digest the samples, and the time is 60 minutes; S55, after the first sample of the first sample rack is left to stand for 30 minutes, every 30 seconds, the entire sample in the sample tube is drawn with a sampling needle and injected into the circulation colorimetric cell for photometric measurement. After the measurement, the inner and outer walls of the circulation cell and the sampling needle are cleaned and the next measurement is prepared; S60, after the samples in the first sample rack are measured, the samples in the second sample rack are processed and measured according to steps S35, S40, S45, S50 and S55.

9. A method for analyzing water iodine, characterized in that: The analysis is performed using the fully automatic urine iodine and water iodine analyzer according to any one of claims 1 to 7, The water iodine analysis method comprises: S10, adding a proper amount of distilled water to the hot water circulation device and the water bath container, and allowing the hot water circulation device to add or extract a proper amount of water to the water bath container through the circulation pipeline; the water temperature in the water bath container and the hot water circulation device is consistent; S15, taking out the first sample rack and the second sample rack, placing sample tubes containing 10 ml of water sample on the sample racks in sequence; and then placing the sample racks in a water bath container; S20, using a manipulator to sequentially add 1 mL of sodium chloride solution, 0.5 mL of arsenite solution, and 1.0 mL of sulfuric acid solution to the sample tube in the first sample rack, send the mixture into a stirrer, mix well, and then put the mixture back to the corresponding position in the first sample rack; S25, every 30 seconds, add 0.5 mL of ammonium cerium sulfate solution to the sample tubes in the first sample rack in turn using a manipulator, send them into the stirrer for mixing, and then put them back to the corresponding position of the first sample rack, and start timing for 20 minutes at the same time; S30, while the samples in the first sample rack are waiting for 30 minutes, 1 mL of sodium chloride solution, 0.5 mL of arsenite solution, and 1.0 mL of sulfuric acid solution are added to the sample tubes in the second sample rack in sequence by a manipulator, and the mixture is sent to a stirrer for mixing, and then the mixture is returned to the corresponding position in the second sample rack; S35, after the first sample in the first sample rack has been standing for 20 minutes, 1.0 mL of ammonium ferrous sulfate solution is added to the sample tube every 30 seconds, and the sample tube is mixed in a stirrer and then put back to the corresponding position of the first sample rack and start timing for 20 minutes; S40, after the first sample in the first sample rack has been standing for 20 minutes, 1.0 mL of potassium thiocyanate solution is added to the sample tube every 30 seconds, and the sample tube is mixed in a stirrer and then returned to the first sample rack, and a timer of 45 minutes is started; S45, after the first sample in the first sample rack is finished and left to stand for 45 minutes, all the samples in the sample tube are sucked out by the injection needle and injected into the circulation colorimetric cell for photometric measurement. After the measurement, the inner and outer walls of the circulation cell and the injection needle are cleaned and the next measurement is prepared; S50, after the samples in the first sample rack are measured, the samples in the second sample rack are processed and measured according to steps S30, S35, S40, and S45.

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