A multi-channel vaporization detection platform and its application

Abstract

The present invention discloses a multi-channel vaporization detection platform, comprising at least two vaporization channels. The present invention discloses a multi-channel vaporization detection platform, which greatly shortens the sample measurement time by setting a plurality of vaporization channels, wherein when one channel is measuring, another channel is being purged and statically balanced, etc. The present application also provides an application of the multi-channel vaporization detection platform, wherein dry gas is used for purging before sampling, effectively removing the residual liquid in the vaporization channel, minimizing the memory effect, and then the liquid sample is used for purging, which can better homogenize the same sample, make the measurement result closer to the sample, and make the result more accurate. For the calibration of standard liquid samples, the traditional method requires a long period of preparation work, and the data of the previous period of time needs to be discarded, while the present invention can greatly shorten the preparation time and quickly calibrate the standard sample.

Description

Technical Field

[0001] The invention relates to a detection platform, and in particular to a multi-channel vaporization detection platform and application thereof. Background Art

[0002] At present, the samples that can be detected by the common concentration and isotope ratio analysis equipment on the market are gas samples. For the testing of liquid samples, different from the analytical technology used, a vaporization platform is required to vaporize the sample and convert it into a gas sample for testing. The existing vaporization platform and vaporization method for processing liquid samples cannot provide a good pre-treatment sample for the analytical test instrument, which will affect the accuracy of the test results. For example, the isotope ratio measurement of water.

[0003] The measurement of hydrogen and oxygen isotope ratios in liquids and water vapor has great applications in environmental monitoring, biomedical diagnosis, and some other industrial, medical, and environmental research fields. Since the sample state that can be detected by the hydrogen and oxygen isotope ratio analysis equipment in water is gas, for liquid samples, they need to be converted into gas before entering the hydrogen and oxygen isotope ratio analysis equipment in water for detection. Isotope ratio analysis is a very precise analysis, so there are strict requirements for the process of converting liquid samples into gas. The gas obtained by conventional vaporization platforms and vaporization methods often cannot meet the detection standards of later analytical instruments. The detection of hydrogen and oxygen isotope ratios in water requires that 100% of liquid water be converted into water vapor and all of it be transmitted to the analyzer for detection, or a part of it be detected after being mixed evenly. If a certain amount of liquid water is evaporated over a period of time, the isotope content of the water vapor will change over time. If the evaporation is incomplete and liquid remains at the end of a certain period of time, the isotopic content of the entire water vapor may be different from the original liquid and the remaining liquid. For example, due to temperature-related fractionation during the evaporation process, the evaporated liquid sample enters the analyzer in an uneven manner. In this case, the following process is required: a) The entire vapor volume must be analyzed; b) During the gas flow, the concentration, isotope ratio and flow rate are measured (or accurately controlled) as a function of time; c) The isotope ratio is determined by multiplying the measured gas isotope ratio by the concentration and flow rate. The above steps ac lead to complexity and inaccuracy in the determination of liquid isotope ratios, requiring other measurements or controls (such as flow rate), and introducing additional complexity and error sources, which brings many inconveniences to sample analysis. Summary of the invention

[0004] In order to overcome the deficiencies of the prior art, one of the objectives of the present invention is to provide a multi-channel vaporization platform that uses at least two vaporization channels to start detection simultaneously, thereby shortening the sample analysis time.

[0005] A second object of the present invention is to provide an application of the multi-channel vaporization platform, which reduces the memory effect and liquid residue, and makes the measurement result more accurate.

[0006] One of the purposes of the present invention is achieved by the following technical solution:

[0007] A multi-channel vaporization detection platform comprises at least two vaporization channels.

[0008] Furthermore, it includes two vaporization channels, namely a first vaporization channel and a second vaporization channel. The first vaporization channel includes a first vaporization chamber, and the second vaporization channel includes a second vaporization chamber. It also includes a dryer connected to the first vaporization chamber and the second vaporization chamber. The first vaporization chamber and the second vaporization chamber are connected to a gas analysis device, and the gas analysis device is connected to the dryer.

[0009] Furthermore, it also includes a vacuum pump, a first filter is provided between the first vaporization chamber and the gas analysis device, a second filter is provided between the second vaporization chamber and the gas analysis device, and the first filter and the second filter are both connected to the vacuum pump.

[0010] Furthermore, a first control device is provided between the dryer and the first vaporization chamber, a third control device is provided between the first vaporization chamber and the first filter, a fifth control device is provided between the first filter and the vacuum pump, a second control device is provided between the second vaporization chamber and the dryer, a fourth control device is provided between the second vaporization chamber and the second filter, and a sixth control device is provided between the second filter and the vacuum pump.

[0011] Furthermore, a seventh control device is provided between the first filter, the second filter and the gas analysis device, the seventh control device is connected to the fifth control device and the sixth control device respectively, and the seventh control device is connected to the dryer.

[0012] Furthermore, a first interconnection device is provided between the first control device, the second control device and the dryer, a second interconnection device is provided between the fifth control device, the sixth control device and the vacuum pump, and the fifth control device and the sixth control device are connected to the seventh control device via a third interconnection device. A fourth interconnection device is provided between the dryer and the gas analysis device, and an eighth control device and an air supply device are provided between the fourth linkage device and the gas analysis device. The eighth control device is connected to the air supply device and the seventh control device, respectively, and the first interconnection device is connected to the fourth interconnection device.

[0013] Furthermore, the first control device, the second control device, the third control device, and the fourth control device are all two-way solenoid valves, the fifth control device, the sixth control device, the seventh control device, and the eighth control device are all two-position three-way solenoid valves, and the first connecting device, the second connecting device, the third connecting device, and the fourth connecting device are all three-way connectors.

[0014] Furthermore, the first vaporization chamber and the second vaporization chamber are both provided with a sampling device, the sampling device comprising a sampling port, a sampling diaphragm located at the sampling port, and a sampling needle passing through the sampling diaphragm, and a porous screen is also provided in the sampling port.

[0015] Furthermore, the outer walls of the first vaporization chamber and the second vaporization chamber are provided with a temperature control device.

[0016] Furthermore, the gas analysis device is one of a spectrometer, a cavity ring-down spectrometer, and a cavity enhanced absorption spectrometer. Other gas analysis devices may also be selected as required.

[0017] The second object of the present invention is achieved by adopting the following technical solution:

[0018] The multi-channel vaporization detection platform is used to vaporize liquid samples and then introduce them into a gas analysis device.

[0019] Further, the following steps are included:

[0020] (1) A dry gas is used to purge the first vaporization channel, and then the liquid sample to be tested is used to purge the first vaporization channel 2-3 times. After the purge is completed, the first vaporization channel enters the state of the sample to be tested;

[0021] (2) injecting the sample to be tested into the first vaporization chamber, allowing the vapor to be homogenized after standing, and then introducing dry gas. After standing, the mixed gas reaches equilibrium in the first vaporization chamber, and the first vaporization channel completes the preparation of the sample to be tested before testing; the homogeneity of the vapor sample is ensured by standing, and when the conditioned sample enters the analytical instrument, the concentration and isotope ratio of the conditioned sample will not change significantly, so that a single measurement of the conditioned sample can provide a fast measurement result, which can correctly represent the original liquid sample. In addition, the conditioned sample can be measured multiple times and the average value can be taken to improve the measurement accuracy;

[0022] (3) passing the gas in the first vaporization chamber after the standing still into the gas analysis device to start the analysis test;

[0023] (4) When the gas in the first vaporization channel begins to be analyzed and tested, the second vaporization channel begins to be purged, first using dry gas for purging, and then purging with the liquid sample to be tested 2-3 times, and the second vaporization channel enters the state of the sample to be tested;

[0024] (5) injecting the liquid sample to be tested into the second vaporization channel, allowing the vapor to be homogenized after standing, and then introducing dry gas. After standing, the mixed gas reaches equilibrium in the second vaporization chamber, and the second vaporization channel completes the preparation before testing the sample to be tested;

[0025] (6) After the gas analysis device that has completed the analysis of the sample from the first vaporization channel is purged with dry gas, the analysis and detection of the sample from the second vaporization channel is started;

[0026] (7) To complete the analysis of one sample, the above process needs to be repeated 2 to 3 times.

[0027] Furthermore, before purging the first vaporization channel, a sample preparation process is also included, which includes: turning on the temperature control device of the first vaporization chamber and the second vaporization chamber, heating the first vaporization chamber and the second vaporization chamber to the sample vaporization temperature at the same time, turning on the vacuum pump, and running the gas analysis device to test the air.

[0028] Furthermore, the above step (1) includes:

[0029] A: First, open the first control device and the third control device, and the gas from the dryer will purge the first vaporization chamber. At the same time, the vacuum pump will absorb the dry gas;

[0030] B: then close the first control device, evacuate the first vaporization chamber to a vacuum state, and close the third control device;

[0031] C: inject the sample to be tested into the first vaporization chamber through the injection needle. After homogenization is completed, open the first control device, and the dry gas enters the first vaporization chamber. Then close the first control device, and let the vapor of the sample to be tested and the dry gas stand and mix evenly;

[0032] D: The third control device is turned on, and the vacuum pump completely extracts the mixed gas. When the first vaporization chamber is in a vacuum state, the third control device is turned off;

[0033] E: Inject the sample again through the sample injection device, repeat the above steps C and D, and the first vaporization channel enters the sample state to be tested.

[0034] Furthermore, the above step (2) includes:

[0035] A: Open the eighth control device, connect the dryer and the gas analysis device, and make the dryer purge the gas analysis device;

[0036] B: Inject the sample to be tested into the first vaporization chamber through the injection needle. After homogenization is completed, open the first control device, and the dry gas enters the first vaporization chamber. Then close the first control device and let the vapor of the sample to be tested and the dry gas stand and mix evenly.

[0037] Furthermore, the above step (3) includes synchronously opening the fifth control device and the seventh control device, closing the eighth control device, and allowing the sample vapor to be analyzed to enter the gas analysis device for analysis and testing.

[0038] Furthermore, the purge process of the second vaporization channel in the above step (4) is as follows:

[0039] A: First, open the second control device and the fourth control device, and the gas from the dryer will purge the second vaporization chamber. At the same time, the vacuum pump will absorb the dry gas;

[0040] B: Then close the second control device, evacuate the second vaporization chamber to a vacuum state, and close the fourth control device;

[0041] C: Inject the sample to be tested into the second vaporization chamber through the injection needle. After homogenization is completed, open the second control device, and the dry gas enters the second vaporization chamber. Then close the second control device and let the vapor of the sample to be tested and the dry gas stand and mix evenly;

[0042] D: Open the fourth control device, and the vacuum pump completely extracts the mixed gas. When the second vaporization chamber is in a vacuum state, close the fourth control device;

[0043] E: Inject the sample again through the sample injection device, repeat the above steps C and D, and the second vaporization channel enters the sample state to be tested.

[0044] Furthermore, the above step (5) includes injecting the sample to be tested into the second vaporization chamber through the injection needle, and after homogenization is completed, opening the second control device to allow the dry gas to enter the second vaporization chamber, and then closing the second control device to allow the vapor of the sample to be tested and the dry gas to be evenly mixed.

[0045] Furthermore, before analyzing and testing the sample of the second vaporization channel in the above step (6), the fifth control device needs to be closed, the sixth control device and the seventh control device need to be opened, and the sample of the second vaporization chamber enters the gas analysis device to start the analysis test.

[0046] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention discloses a multi-channel vaporization detection platform, which greatly shortens the sample measurement time by setting up multiple vaporization channels. When one channel is measuring, another channel is purging and static balancing, etc. The present application also provides an application of the above-mentioned multi-channel vaporization detection platform, in which dry gas is used for purging before sampling to effectively remove the residual liquid in the vaporization channel and minimize the memory effect. Then, liquid sample is used for purging, which can better homogenize the same sample, make the measurement result closer to the sample, and the result is more accurate. For the calibration of standard liquid samples, the traditional method requires a long time of preparation work, and the data of the previous period of time needs to be discarded, while the present invention can greatly shorten the preparation time and quickly calibrate the standard sample. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 This is a schematic diagram of the structure of a multi-channel vaporization platform according to Example 1 of the present invention;

[0048] In the figure: 1, first vaporization chamber; 2, first filter; 3, first control device; 4, third control device; 5, fifth control device; 6, second vaporization chamber; 7, second filter; 8, second control device; 9, fourth control device; 10, sixth control device; 11, first connecting device; 12, second connecting device; 13, third connecting device; 14, fourth connecting device; 15, dryer; 16, air supply device; 17, vacuum pump; 18, temperature control device; 19, seventh control device; 20, eighth control device; 21, gas analysis device; 22, injection device; 222, injection diaphragm; 223, injection needle; 224, porous screen. DETAILED DESCRIPTION

[0049] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

[0050] Example 1

[0051] A multi-channel vaporization detection platform includes at least two vaporization channels, such as Figure 1As shown: the arrow in the figure indicates the flow direction of the sample or gas. In this embodiment, two vaporization channels are included, namely the first vaporization channel and the second vaporization channel. The first vaporization channel includes a first vaporization chamber 1 and a first filter 2 arranged in sequence. The second vaporization chamber 6 includes a second vaporization chamber 6 and a second filter 7 arranged in sequence. Preferably, the first filter 2 and the second filter 7 are stainless steel sintered filters to ensure the cleanliness of the gas entering the gas analysis device 21. The first vaporization chamber 1 and the second vaporization chamber 6 are connected to the dryer 15, and the dryer is used to provide nitrogen or zero air. The first filter 2 and the second filter 7 are both connected to the gas analysis device 21, and the gas analysis device 21 is respectively connected to the dryer 15 and the air providing device 16. The preferred gas analysis device 21 is one of a spectrometer, a cavity ring-down spectrometer, and a cavity enhanced absorption spectrometer. Other gas analysis devices 21 can also be selected as needed. The first filter 2 and the second filter 7 are also connected to the vacuum pump 17, and the maximum vacuum degree that the vacuum pump 17 can provide is less than 1torr, which is convenient for vacuuming the first vaporization chamber 1 and the second vaporization chamber 6.

[0052] A first control device 3 is provided between the dryer 15 and the first vaporization chamber 1, a third control device 4 is provided between the first vaporization chamber 1 and the first filter 2, a fifth control device 5 is provided between the first filter 2 and the vacuum pump 17, a second control device 8 is provided between the second vaporization chamber 6 and the dryer 15, a fourth control device 9 is provided between the second vaporization chamber 6 and the second filter 7, and a sixth control device 10 is provided between the second filter 7 and the vacuum pump 17. A seventh control device 19 is provided between the first filter 2, the second filter 7 and the gas analysis device 21, and the seventh control device 19 is connected to the fifth control device 5 and the sixth control device 10 respectively, and the seventh control device is connected to the dryer 15.

[0053] The first control device 3 and the second control device 8 are connected to the dryer 15 through the first interconnection device 11, the fifth control device 5 and the sixth control device 10 are connected to the vacuum pump 17 through the second interconnection device 12, and the fifth and sixth control devices 10 are connected to the seventh control device 19 through the third interconnection device 13. The dryer 15 is connected to the gas analysis device 21 through the fourth interconnection device 14, and an eighth control device 20 is also provided between the fourth interconnection device 14 and the gas analysis device 21. The eighth control device 20 is connected to the seventh control device 19 and the air supply device 16 respectively, and the first interconnection device 11 is connected to the fourth interconnection device 14.

[0054] Preferably, the first control device 3, the second control device 8, the third control device 4, and the fourth control device 9 are all two-way solenoid valves, which are opened when powered to allow gas to pass through, and closed when powered off to prevent gas from passing through. The fifth control device 5, the sixth control device 10, the seventh control device 19, and the eighth control device 20 are all two-position three-way solenoid valves, which indicate that gas passes between interface A and interface B when powered on, and indicate that gas passes between interface C and interface B when powered off. The first connecting device 11, the second connecting device 12, the third connecting device 13, and the fourth connecting device 14 are all three-way connectors. The above-mentioned control devices are not limited to the valve types listed above, and those skilled in the art may also select other devices that can realize gas path control as needed.

[0055] The first vaporization chamber 1 and the second vaporization chamber 6 are both provided with a sample injection device 22, which includes a sample injection membrane 222 located at the injection port, a sample injection needle 223 passing through the sample injection membrane 222, and a porous screen 224 in the injection port for absorbing salt in the sample. Specifically, the sample can be injected by an automatic injection needle or manually.

[0056] The outer wall of the first vaporization chamber 1 and the second vaporization chamber 6 is provided with a temperature control device 18, and the vaporization temperature of the sample is reached during the measurement process. Preferably, the temperature control device 18 includes a heating control module and a temperature sensor (not shown in the figure, and can be set by a person skilled in the art according to the prior art). The temperature of the vaporization chamber is adjusted by the temperature control device 18, and its temperature is kept within a stable range. Preferably, an insulation layer is provided on the shell of the first vaporization chamber 1 and the second vaporization chamber 6, and an insulation layer can be provided on other components of the vaporization platform to reduce the fluctuation amplitude of the temperature and ensure the accuracy of the detection. The material of the first vaporization chamber 1 and the second vaporization chamber 6 is preferably corundum with a purity of more than 99%, or other materials with weak adsorption and rust-proof surface are selected. The present embodiment is a dual-channel vaporization chamber design, but it is not limited thereto. A three-channel vaporization chamber can be implemented for cyclic testing, or more channels, depending on the size of the sample and the requirements for the measurement time.

[0057] Example 2

[0058] The application of the multi-channel vaporization platform is used to vaporize the liquid sample and then introduce it into the gas analysis device 21, specifically, including the following steps:

[0059] (1) Sample preparation: Turn on the temperature control device 18 of the first vaporization chamber 1 and the second vaporization chamber 6, and heat the first vaporization chamber 1 and the second vaporization chamber 6 to 140° C. at the same time. Turn on the vacuum pump 17 so that the pressure at the interface connected to the vacuum pump 17 is less than 1 torr. The pressure of the dryer connected to the fourth communication device 14 is controlled at a pressure state of 2.5 PSI by a pressure reducing valve. Before starting the sample test, all solenoid valves used as control devices are de-energized, and the gas analysis device 21 is run dry to test the air;

[0060] (2) Sample purge of the first vaporization channel:

[0061] A: First, the first control device 3 and the third control device 4 are turned on, and the nitrogen gas or zero air from the dryer is purged into the first vaporization chamber 1, and at the same time, the vacuum pump 17 absorbs the dry gas, and this process lasts for 10 seconds;

[0062] B: Then close the first control device 3, evacuate the first vaporization chamber 1 to a vacuum state, the process lasts for 10 seconds, and close the third control device 4;

[0063] C: 2 μl of liquid water sample is injected into the first vaporization chamber 1 through the injection needle to completely vaporize the liquid water. After 30 seconds, the water vapor is homogenized in the first vaporization chamber 1. The first control device is turned on for 1 second, and the dry gas enters the first vaporization chamber 1. Then the first control device 3 is closed, and the sample vapor and the dry gas are allowed to stand and mix evenly. This process takes 60 seconds.

[0064] D: The third control device 4 is turned on, and the vacuum pump 17 completely extracts the mixed gas for 10 seconds. When the first vaporization chamber 1 is in a vacuum state, the third control device 4 is turned off;

[0065] E: Inject 2 microliters of liquid water sample again through the sample injection device 22, and repeat the above steps C and D. After completion, the first vaporization chamber 1 enters a vacuum state, and the first vaporization channel enters a sample state to be tested.

[0066] (3) Sample preparation in the first vaporization channel:

[0067] A: Open the eighth control device, connect the dryer and the gas analysis device 21, and make the dryer purge the gas analysis device 21;

[0068] B: 2 μl of the liquid water sample to be tested is injected into the first vaporization chamber 1 through the injection needle. After the liquid water sample is completely vaporized, it is left to stand for 30 seconds. The water vapor is homogenized, and the first control device is turned on. The dry gas enters the first vaporization chamber 1. After 1 second, the first control device 3 is closed. The vapor of the sample to be tested and the dry gas are left to stand for 90 seconds to mix evenly. The mixed gas reaches equilibrium in the first vaporization chamber 1;

[0069] (4) Sample test of the first vaporization channel: the fifth control device 5 and the seventh control device 19 are opened synchronously, and the eighth control device 20 is closed. The sample vapor to be analyzed enters the gas analysis device 21 from the first vaporization chamber 1 for analysis and testing. The test time is 270 seconds.

[0070] (5) Purge the second vaporization channel: When the gas in the first vaporization channel begins to be analyzed and tested, the second vaporization channel begins to be purged. The purge process of the second vaporization channel is as follows:

[0071] A: First, the second control device 8 and the fourth control device 9 are turned on, and the nitrogen from the dryer is used to purge the second vaporization chamber 6. At the same time, the vacuum pump 17 absorbs the dry gas. This process lasts for 10 seconds.

[0072] B: Then close the second control device 8, evacuate the second vaporization chamber 6 to a vacuum state, the process lasts for 10 seconds, and close the fourth control device 9;

[0073] C: 2 microliters of liquid water sample to be tested is injected into the second vaporization chamber 6 through the injection needle, and the liquid water is completely vaporized. After 30 seconds, the water vapor is homogenized in the second vaporization chamber 6. The second control device is turned on for 1 second, and the dry gas enters the second vaporization chamber 6. Then the second control device 8 is closed, and the sample vapor and the dry gas are left to stand for 60 seconds to make the gas mixed and balanced;

[0074] D: Open the fourth control device 9, and the vacuum pump 17 completely pumps out the mixed gas for 10 seconds. When the second vaporization chamber 6 is in a vacuum state, close the fourth control device 9;

[0075] E: Inject 2 μl of water liquid sample again through the sample injection device 22, repeat the above steps C and D, and the second vaporization channel enters the sample state to be tested.

[0076] (6) Sample preparation in the second vaporization channel: 2 μL of liquid water sample is injected into the second vaporization chamber 6 through the injection needle. After the liquid water sample is completely vaporized, it is allowed to stand for 30 seconds to allow the water vapor to be homogenized. The second control device is turned on to allow dry gas to enter the second vaporization chamber 6. The second control device 8 is then closed after 1 second to allow the vapor of the sample to be tested and the dry gas to be mixed evenly. After standing for 90 seconds, the mixed gas reaches equilibrium in the second vaporization chamber 6. The second vaporization channel completes the preparation of the sample to be tested before testing.

[0077] (7) At this time, the sample of the first vaporization channel has been measured, and the gas analysis device 21 that has completed the analysis of the sample of the first vaporization channel is purged with dry gas. After 60 seconds, the fifth control device 5 is closed, the sixth control device 10 and the seventh control device 19 are opened, and the sample of the second vaporization chamber 6 enters the gas analysis device 21, and the analysis and detection of the sample of the second vaporization channel is started. The test time is 270 seconds;

[0078] (8) The first vaporization channel repeats the above steps (2) and (3). After the sample of the second vaporization channel is analyzed, the sample of the first vaporization channel enters process (4). The second vaporization passes through the start steps (5) to (7) and repeats the above steps (2) to (7) 2-3 times until the analysis of a liquid sample is completed.

[0079] Comparative Example 1

[0080] Comparative Example 1 uses a traditional platform with only one vaporization chamber to analyze the sample.

[0081] The analysis process of the present invention has the following advantages compared with Comparative Example 1: the traditional method has only one vaporization chamber, and it is impossible to perform measurements alternately. Three dry gas purges are required, the first one takes 60 seconds, the second dry gas purge takes 90 seconds each time, the third sample preparation stage takes 150 seconds, the sample test stage takes 270 seconds, and after the test, the gas analysis device takes 60 seconds to purge, and each test of a sample takes about 630 seconds. The analysis process of Example 2 of the present invention adopts a dual-channel detection measurement method, and it takes about 320 seconds to complete the test of one needle. It can be seen that the present invention can shorten the detection time and improve the efficiency of sample analysis and measurement.

[0082] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. An application of a multi-channel vaporization detection platform, characterized in that: The method is used to vaporize a liquid sample and then introduce it into a gas analysis device, comprising the following steps: (1) A dry gas is used to purge the first vaporization channel, and then the liquid sample to be tested is used to purge the first vaporization channel 2-3 times. After the purge is completed, the first vaporization channel enters the state of the sample to be tested; (2) injecting the sample to be tested into the first vaporization chamber, allowing the vapor to be homogenized after standing, and then introducing dry gas. After standing, the mixed gas reaches equilibrium in the first vaporization chamber, and the first vaporization channel completes the preparation of the sample to be tested before testing; (3) passing the gas in the first vaporization chamber after the standing still into the gas analysis device to start the analysis test; (4) When the gas in the first vaporization channel begins to be analyzed and tested, the second vaporization channel begins to be purged, first using dry gas for purging, and then purging with the liquid sample to be tested 2-3 times, and the second vaporization channel enters the state of the sample to be tested; (5) injecting the liquid sample to be tested into the second vaporization channel, allowing the vapor to be homogenized after standing, and then introducing dry gas. After standing, the mixed gas reaches equilibrium in the second vaporization chamber, and the second vaporization channel completes the preparation before testing the sample to be tested; (6) After the gas analysis device that has completed the analysis of the first vaporization channel sample is purged with dry gas, the analysis and detection of the second vaporization channel sample is started; (7) To complete the test of a liquid sample, the above process needs to be repeated 2 to 3 times.

2. The application of the multi-channel vaporization platform according to claim 1, characterized in that: Before purging the first vaporization channel, a sample preparation process is also included, which includes: turning on the temperature control devices of the first vaporization chamber and the second vaporization chamber, heating the first vaporization chamber and the second vaporization chamber to the sample vaporization temperature at the same time, turning on the vacuum pump, and running the gas analysis device to test the air.

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